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KR-102961745-B1 - Method of constructing a temporary retaining wall using a pre-fabricated retaining wall

KR102961745B1KR 102961745 B1KR102961745 B1KR 102961745B1KR-102961745-B1

Abstract

The present invention relates to a method for constructing a temporary earth retaining wall using a pre-cutting earth retaining plate, and more specifically, to a method for constructing a temporary earth retaining wall that combines water cutoff and earth retaining by installing a pre-cutting earth retaining plate at the surface in advance, which is a method commonly used in the construction of underground structures. According to the present invention, the installation of a pre-cutting earth retaining plate eliminates the need for a separate construction process to install earth retaining plates underground during excavation. Since the soil and groundwater behind the excavation are blocked by the pre-cutting earth retaining plate, a separate cutoff method is not required, thereby eliminating the need for earth retaining plate installation workers. Furthermore, settlement or sinkholes in the ground behind the excavation can be prevented. Additionally, after the underground structure is constructed, all temporary earth retaining members can be pulled out and reused, and by applying a rental fee to the temporary earth retaining members, there are advantages in terms of safety and economic efficiency.

Inventors

  • 박이근

Assignees

  • (주)지오알앤디

Dates

Publication Date
20260507
Application Date
20251107

Claims (10)

  1. A rear pile installation step (S101) in which a plurality of rear drilling holes (13) are formed parallel to the outer side of the temporary earth retaining construction line (L) of the ground (G), and rear H-piles (1000) and rear internal injection pipes (2000) are installed in the rear drilling holes (13); A rear soil filling step (S102) of injecting soil (M1) into the interior of the rear drilling hole (13); A heat transfer pile insertion step (S103) of forming a plurality of first heat transfer drilling holes (11) along a temporary earth retaining wall construction line (L) of the ground (G), and inserting a heat transfer pile structure (3000) and a heat transfer injection pipe (4000) into the first heat transfer drilling holes (11); A first heat transfer soil filling step (S104) of injecting soil (M2) into the interior of the first heat transfer perforation hole (11); A second heat transfer hole forming step (S105) for forming a second heat transfer hole (12) between adjacent first heat transfer holes (11); A secondary heat transfer soil filling step (S106) of injecting soil (M3) into the interior of the second heat transfer perforation hole (12); A plate insertion hole retaining member extraction step (S107) for extracting the plate insertion hole retaining member (3300) of the above-mentioned heat-resistant pile structure (3000); A soil plate insertion step (S108) of inserting a pre-emptive soil retaining plate (5000) into the second heat-insulated hole (12); A step of forming a support installation space (S109) of excavating the ground between the above rear drilling hole (13) and the first and second front drilling holes (11, 12) to a predetermined depth to form a support installation space (20); A support material installation step (S110) of installing a support material (6000) in the support material installation space (20) above; A step (S111) for forming a basement construction space (30) by excavating the ground inside the above-mentioned heat-resistant pile structure (3000) up to the final excavation surface (G0) to form a basement construction space (30); A drain board installation step (S112) of installing a drain board (7000) on the inner side (3120) of the above-mentioned heat transfer pile structure (3000); A basement floor construction step (S113) of constructing a basement floor (8000) by pouring a mat (8100), a slab (8200), and a wall (8300) in the above basement floor construction space (30); A soil backfilling step (S114) in which soil (M4) is backfilled inside the aforementioned pre-cutting earth retaining plate (5000); A support material dismantling step (S115) for dismantling the above support material (6000); A step (S116) for extracting the above-mentioned heat pile structure (3000) and the pre-cutting earth retaining plate (5000); A heat transfer fluid filling material injection step (S117) of injecting a fluid filling material (F1) into the pulled-out portions (h1, h2) from which the heat transfer pile structure (3000) and the preceding cutoff earth retaining plate (5000) are pulled out; A step of backfilling the support installation space with soil (M5) in the support installation space (20) (S118); A rear pile extraction step (S119) for extracting the rear H-pile (1000) above; The method includes a post-row fluid filling material injection step (S120) of injecting a fluid filling material (F2) into the pulled-out portion (h3) from which the above post-row H-pile (1000) is pulled out; The above rear H-pile (1000) A rear outer plate (1100) positioned on the outer side, and A rear inner piece (1200) positioned on the inner side, and It includes a rear web (1300) positioned between the rear outer piece (1100) and the rear inner piece (1200), and The above-mentioned heat transfer pile structure (3000) is The heat transfer H-pile (3100) and, A retaining plate installation guide (3200) coupled to both sides of the web (3130) with the web (3130) of the above-mentioned heat transfer H-pile (3100) in between, and It includes a plate insertion hole maintaining member (3300) that is fitted and coupled to the inner side of the above earth retaining plate installation guide (3200), and The above-mentioned electric H-pile (3100) A front outer plate (3110) positioned on the outside, and A front-facing inner piece (3120) positioned on the inner side, and It includes a heat transfer web (3130) disposed between the above-mentioned heat transfer outer piece (3110) and heat transfer inner piece (3120), and The above earth retaining plate installation guide (3200) is A first L-shaped steel member (3210) joined to both sides of the heat transfer web (3130), and It includes a second L-shaped steel section (3220) coupled to one side of the first L-shaped steel section (3210), and The above first angle steel (3210) is A first-1 section (3211) that is in close contact with both sides of the heat transfer web (3130), and It includes a first-2 section (3212) extending in a direction perpendicular to the first-1 section (3211), and The above second angle steel (3220) is A second-first steel section (3221) that is in close contact with the outer surface of the first-second steel section (3212), and It includes a second-second steel section (3222) that extends in a direction perpendicular to the second-first steel section (3221) above, but extends in a direction approaching the inner section (3120), and The above second angle steel (3220) is It is characterized by having a guide space (S) formed on the inner side, and The above 2-2 section (3222) is The end is characterized by being positioned with a predetermined distance (d) from the inner piece (3120), and The above-mentioned pre-emptive earth retaining plate (5000) is An arch-shaped earth retaining section (5100) that is convex outwardly, and A first bent portion (5200) formed by bending outward from one end of the above earth retaining portion (5100) and inserted into the guide space (S) of the second-2 section (3222), and A second bent portion (5300) formed by bending outward at the other end of the above earth retaining portion (5100) and inserted into the guide space (S) of the second-2 section steel piece (3222), and It includes a press guide shoe (5400) that is coupled to the bottom of the earth retaining member (5100) and has a width that decreases as it goes down so that the earth retaining member (5100) can be easily pressed in, and The above first bending portion (5200) is It is characterized by being formed longer than the above gap (d) so as not to detach from the above second-2 section (3222), and The above second bending part (5300) is Characterized by being formed longer than the above gap (d) so as not to detach from the second-2 section (3222). Construction method for temporary earth retaining using a pre-cutting earth retaining plate.
  2. A rear pile installation step (S201) in which a plurality of rear drilling holes (13) are formed parallel to the outer side of the temporary earth retaining construction line (L) of the ground (G), and rear H-piles (1000) and rear internal injection pipes (2000) are installed in the rear drilling holes (13); A rear soil filling step (S202) of injecting soil (M1) into the interior of the rear drilling hole (13); A heat transfer pile insertion step (S203) of forming a plurality of first heat transfer drilling holes (11) along a temporary earth retaining wall construction line (L) of the ground (G), and inserting a heat transfer pile structure (3000) and a heat transfer injection pipe (4000) into the first heat transfer drilling holes (11); A first heat transfer soil filling step (S204) of injecting soil (M2) into the interior of the first heat transfer perforation hole (11); A second heat transfer hole forming step (S205) for forming a second heat transfer hole (12) between adjacent first heat transfer holes (11); A plate insertion hole retaining member extraction step (S206) for extracting the plate insertion hole retaining member (3300) of the above-mentioned heat-resistant pile structure (3000); A soil barrier plate installation step (S207) of installing a pre-emptive soil barrier plate (5000) into the second heat-insulated hole (12); A soil injection step (S208) for injecting soil (M6) into the outer side of the soil retaining part (5100) of the preceding cutoff earth retaining plate (5000) among the above second heat-perforated holes (12); A step of forming a support installation space (S209) of excavating the ground between the above rear drilling hole (13) and the first and second front drilling holes (11, 12) to a predetermined depth to form a support installation space (20); A support material installation step (S210) of installing a support material (6000) in the support material installation space (20) above; A step (S211) for forming a basement construction space (30) by excavating the ground inside the above-mentioned heat-resistant pile structure (3000) up to the final excavation surface (G0) to form a basement construction space (30); A drain board installation step (S212) of installing a drain board (7000) on the inner side (3120) of the above-mentioned heat-resistant pile structure (3000); A basement floor construction step (S213) of constructing a basement floor (8000) by pouring a mat (8100), a slab (8200), and a wall (8300) in the above basement floor construction space (30); A soil backfilling step (S214) in which soil (M4) is backfilled inside the aforementioned pre-cutting earth retaining plate (5000); A support material dismantling step (S215) for dismantling the above support material (6000); A step (S216) for extracting the above-mentioned heat-resistant pile structure (3000) and the pre-emptive earth retaining plate (5000); A heat transfer fluid filling material injection step (S217) of injecting a fluid filling material (F1) into the pulled-out portions (h1, h2) from which the heat transfer pile structure (3000) and the preceding cutoff earth retaining plate (5000) are pulled out; A step of backfilling the support installation space with soil (M5) in the above support installation space (20) (S218); A rear pile extraction step (S219) for extracting the rear H-pile (1000) above; The method includes a post-row fluid filling material injection step (S220) of injecting a fluid filling material (F2) into the pulled-out portion (h3) from which the above post-row H-pile (1000) is pulled out, and The above rear H-pile (1000) A rear outer plate (1100) positioned on the outer side, and A rear inner piece (1200) positioned on the inner side, and It includes a rear web (1300) positioned between the rear outer piece (1100) and the rear inner piece (1200), and The above-mentioned heat transfer pile structure (3000) is The heat transfer H-pile (3100) and, A retaining plate installation guide (3200) coupled to both sides of the web (3130) with the web (3130) of the above-mentioned heat-resistant H-pile (3100) in between, and It includes a plate insertion hole maintaining member (3300) that is fitted and coupled to the inner side of the above earth retaining plate installation guide (3200), and The above-mentioned electric H-pile (3100) A front outer plate (3110) positioned on the outside, and A front-facing inner piece (3120) positioned on the inner side, and It includes a heat transfer web (3130) disposed between the above-mentioned heat transfer outer piece (3110) and heat transfer inner piece (3120), and The above earth retaining plate installation guide (3200) is A first L-shaped steel member (3210) joined to both sides of the heat transfer web (3130), and It includes a second L-shaped steel section (3220) coupled to one side of the first L-shaped steel section (3210), and The above first angle steel (3210) is A first-1 section (3211) that is in close contact with both sides of the heat transfer web (3130), and It includes a first-2 section (3212) extending in a direction perpendicular to the first-1 section (3211), and The above second angle steel (3220) is A second-first steel section (3221) that is in close contact with the outer surface of the first-second steel section (3212), and It includes a second-second steel section (3222) that extends in a direction perpendicular to the second-first steel section (3221) above, but extends in a direction approaching the inner section (3120), and The above second angle steel (3220) is It is characterized by having a guide space (S) formed on the inner side, and The above 2-2 section (3222) is The end is characterized by being positioned with a predetermined distance (d) from the inner piece (3120), and The above-mentioned pre-emptive earth retaining plate (5000) is An arch-shaped earth retaining section (5100) that is convex outwardly, and A first bent portion (5200) formed by bending outward from one end of the above earth retaining portion (5100) and inserted into the guide space (S) of the second-2 section (3222), and A second bent portion (5300) formed by bending outward at the other end of the above earth retaining portion (5100) and inserted into the guide space (S) of the second-2 section steel piece (3222), and It includes a press guide shoe (5400) that is coupled to the bottom of the earth retaining member (5100) and has a width that decreases as it goes down so that the earth retaining member (5100) can be easily pressed in, and The above first bending portion (5200) is It is characterized by being formed longer than the above gap (d) so as not to detach from the above second-2 section (3222), and The above second bending part (5300) is Characterized by being formed longer than the above gap (d) so as not to detach from the above second-2 section (3222). Construction method for temporary earth retaining using a pre-cutting earth retaining plate.
  3. In either Article 1 or Article 2, The above support material (6000) A band member (6200) connected in a direction perpendicular to the outer plate (3110) of the H-pile (3100), and A horizontal connecting member (6300) connecting the above-mentioned tie beam (6200) and the rear inner section (1200) of the rear H-pile (1000), and Characterized by including a sub-beam (6400) that is coupled to the upper part of the horizontal connecting member (6300) and simultaneously coupled in a direction orthogonal to the rear inner section (1200) of the rear H-pile (1000). Construction method for temporary earth retaining using a pre-cutting earth retaining plate.
  4. In paragraph 3, The above support material (6000) It further includes a support member (6100) that is coupled to the outer plate (3110) of the H-pile (3100) and simultaneously supports the tie beam (6200), The above-mentioned hook (6100) is It is characterized by three first, second, and third beam hangers (6110, 6120, 6130) made of angle steel being arranged in the shape of a right triangle, and The above first hanging piece (6110) is The open portion of the angle steel is directed toward the heat transfer H-pile (3100) and is in close contact with the heat transfer outer portion (3110) of the heat transfer H-pile (3100). The above second hanging piece (6120) is One end (6120a) is connected to the upper end (6110a) of the first beam member (6110) and installed in a horizontal direction, characterized in that the open part of the angle steel faces upward. The above third hanging piece (6130) is It is installed obliquely between the lower end (6110b) of the first beam hanger (6110) and the other end (6120b) of the second beam hanger (6120), characterized in that the open part of the L-shaped steel faces the first and second beam hangers (6110, 6120). Construction method for temporary earth retaining using a pre-cutting earth retaining plate.
  5. In paragraph 3, The above support material (6000) It further includes a first heat transfer groove filling (6500) that supports the outer heat transfer member (6200) while being coupled to the outer heat transfer member (3110) and simultaneously adjusting the gap between the outer heat transfer member (3110) and the tie member (6200) of the heat transfer H-pile (3100). The above first heat transfer groove filling (6500) is An outer contact piece (6510) that is in close contact with the outer surface of the front outer piece (3110), and A first inner contact piece (6520) that is in close contact with one side of the inner surface of the outer front piece (3110), and A second inner contact piece (6530) that is in close contact with the other side of the inner surface of the front outer piece (3110), and A first connecting piece (6540) connecting the outer contact piece (6510) and the first inner contact piece (6520), and A second connecting piece (6550) connecting the outer contact piece (6510) and the second inner contact piece (6530), and A support piece (6560) extending from the lower end of the first connecting piece (6540) to support the tie beam (6200), and A first coupling means (6570) that screws together the above-mentioned band (6200), outer contact piece (6510), first inner contact piece (6520), and first connecting piece (6540) by penetrating through them, and Characterized by including a second coupling means (6580) that screws through the above-mentioned band (6200), outer contact piece (6510), second inner contact piece (6530), and second connecting piece (6550). Construction method for temporary earth retaining using a pre-cutting earth retaining plate.
  6. In paragraph 3, The above support material (6000) A second heat-filling groove (6600) that is coupled to the heat-outer piece (3110) and supports the strip (6200) while adjusting the gap between the heat-outer piece (3110) and the strip (6200) of the heat-outer H-pile (3100), and It further includes a C-shaped fitting means (6700) that connects the horizontal connecting member (6300) and the tie beam (6200) in a fitting manner, and The above second heat transfer groove filling (6600) is An outer contact piece (6610) that is in close contact with the outer surface of the front outer piece (3110), and A first inner contact piece (6620) that is in close contact with one side of the inner surface of the outer front piece (3110), and A second inner contact piece (6630) that is in close contact with the other side of the inner surface of the outer front piece (3110), and A first connecting piece (6640) connecting the outer contact piece (6610) and the first inner contact piece (6620), and A second connecting piece (6650) connecting the outer contact piece (6610) and the second inner contact piece (6630), and A support piece (6660) extending from the lower end of the outer contact piece (6610) and supporting the tie beam (6200), and A first coupling means (6670) formed in a U-shape that surrounds and fits the band (6200), wherein one end penetrates the upper part of the outer contact piece (6610), the upper part of the first inner contact piece (6620), and the upper part of the first connecting piece (6640) to be screw-coupled, and the other end penetrates the lower part of the outer contact piece (6610), the lower part of the first inner contact piece (6620), and the lower part of the first connecting piece (6640) to be screw-coupled, and A first pad member (6675) disposed between the strip (6200) and the outer contact piece (6610) while the first coupling means (6670) is penetrated, and A second coupling means (6680) formed in a U-shape that surrounds and fits the band (6200), wherein one end penetrates the upper part of the outer contact piece (6610), the upper part of the second inner contact piece (6630), and the upper part of the second connecting piece (6650) to be screw-coupled, and the other end penetrates the lower part of the outer contact piece (6610), the lower part of the second inner contact piece (6630), and the lower part of the second connecting piece (6650) to be screw-coupled, and Characterized by including a second pad member (6685) that is positioned between the strip (6200) and the outer contact piece (6610) while penetrating the second coupling means (6680). Construction method for temporary earth retaining using a pre-cutting earth retaining plate.
  7. In paragraph 5, The above support material (6000) It further includes a rear groove filling (6800) that allows the gap between the rear inner piece (1200) of the rear H-pile (1000) and the horizontal connecting member (6300) and the gap between the rear inner piece (1200) of the rear H-pile (1000) and the sub-beam (6400) to be joined while simultaneously adjusting the gap. The above rear groove filling (6800) is An outer contact piece (6810) that is in close contact with the outer surface of the rear inner piece (1200), and A first inner contact piece (6820) that is in close contact with one side of the inner surface of the rear inner piece (1200), and A second inner contact piece (6830) that is in close contact with the other side of the inner surface of the rear inner piece (1200), and A first connecting piece (6840) connecting the outer contact piece (6810) and the first inner contact piece (6820), and A second connecting piece (6850) connecting the outer contact piece (6810) and the second inner contact piece (6830), and A first coupling means (6860) that screws through the lower part of the horizontal connecting member (6300) and the outer contact piece (6810), the lower part of the first inner contact piece (6820), and the lower part of the first connecting piece (6840), and A second coupling means (6870) that screws through the lower part of the horizontal connecting member (6300) and the outer contact piece (6810), the lower part of the second inner contact piece (6830), and the lower part of the second connecting piece (6850), and A third coupling means (6880) that screws through the upper part of the sub-beam (6400) and the outer contact piece (6810), the upper part of the first inner contact piece (6820), and the upper part of the first connecting piece (6840), and Characterized by including a fourth coupling means (6890) that screws through the upper part of the sub-beam (6400) and the outer contact piece (6810), the upper part of the second inner contact piece (6830), and the upper part of the second connecting piece (6850). Construction method for temporary earth retaining using a pre-cutting earth retaining plate.
  8. In paragraph 6, It further includes a rear groove filling (6800) coupled to the rear inner piece (1200) while simultaneously adjusting the gap between the rear inner piece (1200) of the rear H-pile (1000) and the horizontal connecting member (6300) and the gap between the rear inner piece (1200) of the rear H-pile (1000) and the sub-beam (6400). The above rear groove filling (6800) is An outer contact piece (6810) that is in close contact with the outer surface of the rear inner piece (1200), and A first inner contact piece (6820) that is in close contact with one side of the inner surface of the rear inner piece (1200), and A second inner contact piece (6830) that is in close contact with the other side of the inner surface of the rear inner piece (1200), and A first connecting piece (6840) connecting the outer contact piece (6810) and the first inner contact piece (6820), and A second connecting piece (6850) connecting the outer contact piece (6810) and the second inner contact piece (6830), and A first coupling means (6860) that screws through the lower part of the horizontal connecting member (6300) and the outer contact piece (6810), the lower part of the first inner contact piece (6820), and the lower part of the first connecting piece (6840), and A second coupling means (6870) that screws through the lower part of the horizontal connecting member (6300) and the outer contact piece (6810), the lower part of the second inner contact piece (6830), and the lower part of the second connecting piece (6850), and A third coupling means (6880) that screws through the upper part of the sub-beam (6400) and the outer contact piece (6810), the upper part of the first inner contact piece (6820), and the upper part of the first connecting piece (6840), and Characterized by including a fourth coupling means (6890) that screws through the upper part of the sub-beam (6400) and the outer contact piece (6810), the upper part of the second inner contact piece (6830), and the upper part of the second connecting piece (6850). Construction method for temporary earth retaining using a pre-cutting earth retaining plate.
  9. A heat transfer pile insertion step (S301) of forming a plurality of first heat transfer drilling holes (11) along a temporary earth retaining wall construction line (L) of the ground (G) and inserting a heat transfer pile structure (3000) and a heat transfer injection pipe (4000) into the first heat transfer drilling holes (11); A first heat transfer soil filling step (S302) of injecting soil (M2) into the interior of the first heat transfer perforation hole (11); A second heat transfer hole forming step (S303) for forming a second heat transfer hole (12) between adjacent first heat transfer holes (11); A secondary heat transfer soil filling step (S304) of injecting soil (M3) into the interior of the second heat transfer perforation hole (12); A plate insertion hole retaining member extraction step (S305) for extracting the plate insertion hole retaining member (3300) of the above-mentioned heat transfer pile structure (3000); A soil plate insertion step (S306) of inserting a pre-emptive soil retaining plate (5000) into the second heat-insulated hole (12); A step (S307) for forming a basement construction space (30) by excavating the ground inside the above-mentioned heat-resistant pile structure (3000) up to the final excavation surface (G0) to form a basement construction space (30); A drain board installation step (S308) of installing a drain board (7000) on the inner side (3120) of the above-mentioned heat transfer pile structure (3000); A basement floor construction step (S309) for constructing a basement floor (8000) by pouring a mat (8100), a slab (8200), and a wall (8300) in the above basement floor construction space (30); A soil backfilling step (S310) in which soil (M4) is backfilled inside the aforementioned pre-cutting earth retaining plate (5000); A step (S311) for extracting the above-mentioned heat pile structure (3000) and the preceding cutoff earth retaining plate (5000); The method includes a heat transfer fluid filling material injection step (S312) of injecting a fluid filling material (F1) into the pulled-out portions (h1, h2) from which the heat transfer pile structure (3000) and the pre-cutting earth retaining plate (5000) are pulled out, and The above-mentioned heat transfer pile structure (3000) is The heat transfer H-pile (3100) and, A retaining plate installation guide (3200) coupled to both sides of the web (3130) with the web (3130) of the above-mentioned heat-resistant H-pile (3100) in between, and It includes a plate insertion hole maintaining member (3300) that is fitted and coupled to the inner side of the above earth retaining plate installation guide (3200), and The above-mentioned electric H-pile (3100) A front outer plate (3110) positioned on the outside, and A front-facing inner piece (3120) positioned on the inner side, and It includes a heat transfer web (3130) disposed between the above-mentioned heat transfer outer piece (3110) and heat transfer inner piece (3120), and The above earth retaining plate installation guide (3200) is A first L-shaped steel member (3210) joined to both sides of the heat transfer web (3130), and It includes a second L-shaped steel section (3220) coupled to one side of the first L-shaped steel section (3210), and The above first angle steel (3210) is A first-1 section (3211) that is in close contact with both sides of the heat transfer web (3130), and It includes a first-second steel section (3212) extending in a direction perpendicular to the first-first steel section (3211), and The above second angle steel (3220) is A second-first steel section (3221) that is in close contact with the outer surface of the first-second steel section (3212), and It includes a second-second steel section (3222) that extends in a direction perpendicular to the second-first steel section (3221) above, but extends in a direction approaching the inner section (3120), and The above second angle steel (3220) is It is characterized by having a guide space (S) formed on the inner side, and The above 2-2 section (3222) is The end is characterized by being positioned with a predetermined distance (d) from the inner piece (3120), and The above-mentioned pre-emptive earth retaining plate (5000) is An arch-shaped earth retaining section (5100) that is convex outwardly, and A first bent portion (5200) formed by bending outward from one end of the above earth retaining portion (5100) and inserted into the guide space (S) of the second-2 section (3222), and A second bent portion (5300) formed by bending outward at the other end of the above earth retaining portion (5100) and inserted into the guide space (S) of the second-2 section steel piece (3222), and It includes a press guide shoe (5400) that is coupled to the bottom of the earth retaining member (5100) and has a width that decreases as it goes down so that the earth retaining member (5100) can be easily pressed in, and The above first bending portion (5200) is It is characterized by being formed longer than the above gap (d) so as not to detach from the above second-2 section (3222), and The above second bending part (5300) is Characterized by being formed longer than the above gap (d) so as not to detach from the above second-2 section (3222). Construction method for temporary earth retaining using a pre-cutting earth retaining plate.
  10. A heat transfer pile insertion step (S401) of forming a plurality of first heat transfer drilling holes (11) along a temporary earth retaining wall construction line (L) of the ground (G) and inserting a heat transfer pile structure (3000) and a heat transfer injection pipe (4000) into the first heat transfer drilling holes (11); A first heat transfer soil filling step (S402) of injecting soil (M2) into the interior of the first heat transfer perforation hole (11); A second heat transfer hole forming step (S403) for forming a second heat transfer hole (12) between adjacent first heat transfer holes (11); A plate insertion hole retaining member extraction step (S404) for extracting the plate insertion hole retaining member (3300) of the above-mentioned heat-resistant pile structure (3000); A soil barrier plate installation step (S405) of installing a pre-emptive soil barrier plate (5000) into the second heat-insulated hole (12); A soil injection step (S406) for injecting soil (M6) into the outer side of the soil retaining part (5100) of the preceding cutoff earth retaining plate (5000) among the second heat-perforated holes (12); A step (S407) for forming a basement construction space (30) by excavating the ground inside the above-mentioned heat-resistant pile structure (3000) up to the final excavation surface (G0) to form a basement construction space (30); A drain board installation step (S408) of installing a drain board (7000) on the inner side (3120) of the above-mentioned heat transfer pile structure (3000); A basement floor construction step (S409) in which a basement floor (8000) is constructed by pouring a mat (8100), a slab (8200), and a wall (8300) into the above basement floor construction space (30); A soil backfilling step (S410) in which soil (M4) is backfilled inside the aforementioned pre-cutting earth retaining plate (5000); A step (S411) for extracting the above-mentioned heat pile structure (3000) and the preceding cutoff earth retaining plate (5000); The method includes a heat transfer fluid filling material injection step (S412) of injecting a fluid filling material (F1) into the pulled-out portions (h1, h2) from which the heat transfer pile structure (3000) and the pre-cutting earth retaining plate (5000) are pulled out, and The above-mentioned heat transfer pile structure (3000) is The heat transfer H-pile (3100) and, A retaining plate installation guide (3200) coupled to both sides of the web (3130) with the web (3130) of the above-mentioned electric H-pile (3100) in between, and It includes a plate insertion hole maintaining member (3300) that is fitted and coupled to the inner side of the above earth retaining plate installation guide (3200), and The above-mentioned electric H-pile (3100) A front outer plate (3110) positioned on the outside, and A front-facing inner piece (3120) positioned on the inner side, and It includes a heat transfer web (3130) disposed between the above-mentioned heat transfer outer piece (3110) and heat transfer inner piece (3120), and The above earth retaining plate installation guide (3200) is A first L-shaped steel member (3210) joined to both sides of the heat transfer web (3130), and It includes a second L-shaped steel section (3220) coupled to one side of the first L-shaped steel section (3210), and The above first angle steel (3210) is A first-1 section (3211) that is in close contact with both sides of the heat transfer web (3130), and It includes a first-second steel section (3212) extending in a direction perpendicular to the first-first steel section (3211), and The above second angle steel (3220) is A second-first steel section (3221) that is in close contact with the outer surface of the first-second steel section (3212), and It includes a second-second steel section (3222) that extends in a direction perpendicular to the second-first steel section (3221) above, but extends in a direction approaching the inner section (3120), and The above second angle steel (3220) is It is characterized by having a guide space (S) formed on the inner side, and The above 2-2 section (3222) is The end is characterized by being positioned with a predetermined distance (d) from the inner piece (3120), and The above-mentioned pre-emptive earth retaining plate (5000) is An arch-shaped earth retaining section (5100) that is convex outwardly, and A first bent portion (5200) formed by bending outward from one end of the above earth retaining portion (5100) and inserted into the guide space (S) of the second-2 section (3222), and A second bent portion (5300) formed by bending outward at the other end of the above earth retaining portion (5100) and inserted into the guide space (S) of the second-2 section steel piece (3222), and It includes a press guide shoe (5400) that is coupled to the bottom of the earth retaining member (5100) and has a width that decreases as it goes down so that the earth retaining member (5100) can be easily pressed in, and The above first bending portion (5200) is It is characterized by being formed longer than the above gap (d) so as not to detach from the above second-2 section (3222), and The above second bending part (5300) is Characterized by being formed longer than the above gap (d) so as not to detach from the second-2 section (3222). Construction method for temporary earth retaining using a pre-cutting earth retaining plate.

Description

Method of constructing a temporary retaining wall using a pre-fabricated retaining wall The present invention relates to a method for constructing a temporary earth retaining wall using a pre-cutting earth retaining plate, and more specifically, to a method for constructing a temporary earth retaining wall that combines water cutoff and earth retaining by installing a pre-cutting earth retaining plate at the surface in advance, which is a method commonly used in the construction of underground structures. When planning a new building, securing underground space is almost essential. Temporary earth retaining walls must be constructed to excavate to the planned depth of the underground structure. It is common practice to construct these temporary earth retaining walls on the inner side of the project site, extending from the site boundary, and then extract and dismantle them to reuse the materials after excavation and the completion of the underground structure. Furthermore, since waterproofing measures must be established for the temporary walls, additional site space and costs are incurred for such measures; consequently, construction methods that incorporate waterproofing functions are frequently chosen. Due to these circumstances, practitioners have long been making great efforts to devise a method to use walls with waterproofing capabilities for temporary earth retaining walls. Representative methods include the overlapping C.I.P method and the deep mixing method, but they are facing problems due to the difficulty of securing waterproofing capabilities, the application of large equipment, and space limitations at the project site. Furthermore, these construction methods present significant difficulties in extracting king piles located within temporary walls after excavation and underground structure completion. Moreover, the extraction space is not sufficiently filled after extraction, which can become a future groundwater flow path, thereby causing sinkholes or ground subsidence. This fact runs counter to the recent implementation of the Special Act on Underground Safety Management aimed at preventing subsidence of surrounding ground during underground excavation. Therefore, the development of this patented technology is particularly important given the social reality that demands measures to promptly resolve issues arising during underground excavation. A major advantage of this patented technology is that after the underground structure is completed, the king piles and pre-cutting earth retaining plates within the temporary earth retaining wall can be easily pulled out, and the pulled-out space can be densely filled. FIG. 1 is a flowchart of a construction method for a temporary earth retaining wall according to the first embodiment of the present invention. Figure 2 is a drawing of the rear pile installation stage (S101). Figure 3 is a drawing of the rear soil filling step (S102). Figure 4 is a drawing of the heat pile insertion step (S103). FIG. 5 is a drawing of the first heat transfer soil filling step (S104) and the second heat transfer perforation hole formation step (S105). FIG. 6 is a drawing of the secondary heat transfer soil filling step (S106) and the plate insertion hole retaining member pulling step (S107). Figure 7 is a drawing of the earth retaining plate insertion step (S108). Figure 8 is a drawing of the step (S109) for forming the space for installing support materials. Figure 9 is a drawing of the support installation step (S110). FIG. 10 is a drawing of the underground floor construction space formation step (S111) and the drain board installation step (S112). Figure 11 is a drawing of the underground floor construction stage (S113) and the backfilling stage of soil inside the retaining plate (S114). Figure 12 is a drawing of the support dismantling stage (S115). FIG. 13 is a drawing of the heat pile and earth retaining plate extraction step (S116) and the heat fluid filling material injection step (S117). FIG. 14 is a drawing of the backfilling stage of the support installation space (S118) and the rear pile extraction stage (S119). FIG. 15 is a drawing of the post-heat fluid filling re-injection step (S120). FIG. 16 is a flowchart of a construction method for a temporary earth retaining wall according to a second embodiment of the present invention. FIG. 17 is a drawing of the plate insertion hole retaining member drawing step (S206). Figure 18 is a drawing of the earth retaining plate installation stage (S207). FIG. 19 is a drawing of the soil injection step (S208) outside the earth retaining plate. FIG. 20 is a flowchart of a construction method for a temporary earth retaining wall according to the third embodiment of the present invention. FIG. 21 is a drawing of the heat pile insertion step (S301). FIG. 22 is a drawing of the first heat transfer soil filling step (S302) and the second heat transfer perforation hole formation step (S303). FIG. 23 is a drawing of the secondary