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CN-117846001-B - Civil foundation pile construction method

CN117846001BCN 117846001 BCN117846001 BCN 117846001BCN-117846001-B

Abstract

The invention discloses a construction method of a civil foundation pile, which aims to provide the construction method of the civil foundation pile with strong stability, simple construction method, strong practicability and greatly improved reinforcing effect on the foundation pile, and the technical scheme is characterized in that in the invention, the cooperation between a steel pipe column and a column jacket is adopted, the traditional method of only adopting the steel pipe column is changed, the column jacket is firstly half screwed into the ground, soil in the column jacket is excavated, when the steel pipe column is matched, the protection of the steel pipe column is realized, meanwhile, the support of the steel pipe column is improved, a powerful reinforcing and guaranteeing effect is formed, the subsequent operation space can be increased after the steel pipe column is half screwed into the ground, soil is excavated first, the subsequent screwing-in stability is facilitated, the phenomenon that the column jacket falls down is avoided, and the installation of the steel pipe column is influenced.

Inventors

  • ZHANG JUN
  • XIAO HONGSONG

Assignees

  • 浙江润方建设有限公司

Dates

Publication Date
20260505
Application Date
20230426

Claims (5)

  1. 1. S1, preparing a steel pipe column (1) and a column jacket (2), firstly half screwing the column jacket (2) into the ground, and excavating soil in the column jacket (2); s2, sinking the steel pipe column (1) along the inner wall of the column jacket (2) towards the ground, and completely pressing the steel pipe column (1) into the ground, so as to keep the column jacket (2) at the original position for subsequent construction; s3, downwards drilling through the steel pipe upright post (1) to form a filling pile hole (3) for drilling the filling pile, and protecting walls by mud in the drilling process; S4, placing a plurality of sections of wall protection sleeves (5) into the bored concrete pile hole (3), fixing the sections of wall protection sleeves (5) through a clamping structure, and forming a support for the bored concrete pile hole (3); S5, ensuring that the reinforcement cage (4) and the retaining wall sleeve (5) are positioned at the same axial line through the reinforcement cage (4) under the steel pipe column (1), enabling the reinforcement cage (4) to extend upwards from the bottom of the filling pile hole (3) to enter one section of the inner bottom of the steel pipe column (1), filling concrete into the filling pile hole (3) and one section of the bottom of the steel pipe column (1), enabling the filled concrete to cover the cage section of the reinforcement cage (4) entering the steel pipe column (1), and forming a bored pile after the concrete is filled last time; S6, screwing the upright post sheath (2) into the ground completely, and tamping the compaction degree of soil around the upright post sheath (2) gradually; s7, pouring concrete into the steel pipe upright post (1), and forming a steel pipe concrete upright post after pouring concrete next time; S8, after the concrete is solidified, the column jacket (2) is screwed out, the steel tube column (1) is taken out to finish processing, the column jacket (2) comprises an outer rotary sleeve body (20), an inner rotary sleeve body (21) and a supporting sleeve body (22) which are sequentially arranged from outside to inside, the outer rotary sleeve body (20) comprises an outer thread (201), an outer buckle and an outer sleeve body end face (202), the outer sleeve body end face (202) and the outer buckle are respectively positioned at the upper end and the lower end of the outer thread (201), the outer thread (201) is gradually reduced from the outer sleeve body end face (202) at the upper end to the outer buckle at the lower end, the outer rotary sleeve body (20) is further provided with an axial through hole (203) and a plurality of grooves (204), each groove (204) is arranged on the radial outer side of the outer thread (201) and the outer buckle, the grooves (204) are communicated with the axial through hole (203) and the outer rotary sleeve body (20) so that the outer buckle is provided with a plurality of buckling parts, the inner rotary sleeve body (21) comprises a plurality of inner rotary sleeve body (21) parts, the inner rotary sleeve body (21) comprises a plurality of inner rotary sleeve body 21) parts, the inner rotary sleeve body 21) comprises a guide block (212) and an inner rotary sleeve body (21) is arranged on an inner rotary sleeve body (212) and an inner rotary guide block (212), the inner clamping groove (214) is positioned at the outer side of the guide plate (212), the guide plate (212) is inserted into the axial through hole (203), the clamping part is inserted into the inner clamping groove (214), the supporting sleeve body (22) comprises an inner main sleeve body (220) and annular protrusions (221) arranged on the inner main sleeve body (220), the supporting sleeve body (22) is inserted between the axial through hole (203) and a plurality of guide plates (212), the diameter of the inner main sleeve body (220) is larger than or equal to the diameter of a vertical through hole defined by the four guide plates (212), the annular protrusions (221) are inserted into a plurality of inner grooves (213), the axial through hole (203) comprises conical hole sections penetrating through the lower end of the outer rotating sleeve body (20), the inner diameter of the conical hole sections is gradually reduced along the installation direction, so that a space is reserved between the axial through hole (203) and the guide plate (212), the outer surface of the guide plate (212) comprises gradually reduced surfaces arranged from top to bottom, the inner threads are arranged on the gradually reduced surfaces, the inner clamping groove (214) and the inner circumferential surface of the outer clamping sleeve body (21) are combined with the outer circumferential surface of the inner circumferential surface (201).
  2. 2. The construction method of the civil foundation pile according to claim 1, wherein the outer surface of the guide plate (212) further comprises a cylindrical surface connected to the upper end of the descending surface, the axial through hole (203) is a step hole, the upper end of the axial through hole (203) is larger than the lower end, the support sleeve body (22) further comprises an extension sleeve body (222) arranged at the upper end of the clamping post, the extension sleeve body (222) is fixed on the end face (202) of the outer sleeve body through bolts, the extension sleeve body (222) is installed at the upper end of the axial through hole (203), the extension sleeve body (222) is provided with a piece taking hook hole, the piece taking hook hole is arc-shaped, and two ends of the piece taking hook hole penetrate through the upper surface of the extension sleeve body (222).
  3. 3. The construction method of the civil foundation pile according to claim 2, wherein the outer clip comprises a descending part (223) connected to the lower end of the outer screw thread (201) and an upper insertion projection (224) protruding outwards from the lower end of the descending part (223), the inner clip groove (214) comprises an upward opening slot (225) and a lower insertion projection (226) arranged on the outer side wall of the slot (225), the descending part (223) is inserted into the slot (225), and the upper insertion projection (224) is positioned on the lower side of the lower insertion projection (226).
  4. 4. The construction method of the civil foundation pile according to claim 1, wherein the retaining wall sleeve (5) comprises an upper assembly (50) and a lower assembly (51) far away from one side of the upper assembly (50), inner pipes (52) and splicing pieces (53) uniformly arranged between the upper assembly (50) and the lower assembly (51) and distributed along the periphery of the inner pipes (52) are sleeved in the upper assembly (50) and the lower assembly (51), mounting grooves (54) are uniformly formed in one side of the upper assembly (50), insertion blocks (55) are arranged in the mounting grooves (54), empty grooves (56) are formed in the insertion blocks (55), locking blocks (57) are arranged in the empty grooves (56), and inserted rods (58) matched with the empty grooves (56) are arranged on the lower assembly (51).
  5. 5. The construction method of the civil foundation pile according to claim 1, wherein the end face of the outer rotary sleeve body (20) is provided with a jack for being matched with rotary equipment to press the outer rotary sleeve body (20) into the ground.

Description

Civil foundation pile construction method Technical Field The invention relates to the technical field of civil engineering, in particular to a construction method of a civil foundation pile. Background Bored piles are a common foundation form, and are indispensable in almost all civil engineering works such as bridge works, construction works, dock works, etc., and can provide very good vertical bearing capacity, but have very poor horizontal bearing capacity. For foundations which generally need to provide large horizontal bearing capacity, such as bridge piers, anti-collision piers, arch bridge pier foundations and the like, almost all the bored pile group pile foundations are adopted, and in the casting process, the situation that pile body inclination occurs when the pile body is at the casting tail end is influenced due to the reason of staged casting, so that the integral foundation pile strength is influenced. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide the civil foundation pile construction method which has the advantages of strong stability, simple construction method and strong practicability and greatly improves the reinforcing effect on the foundation pile. S1, preparing a steel pipe column and a column jacket, firstly half screwing the column jacket into the ground, and excavating soil in the column jacket; S2, sinking the steel pipe column along the inner wall of the column jacket to the position below the ground, and completely pressing the steel pipe column below the ground, so as to keep the column jacket at the original position for subsequent construction; S3, downwards drilling through the steel pipe upright post to form a filling pile hole for drilling the filling pile, and protecting the wall by mud in the drilling process; S4, placing a plurality of sections of wall protection sleeves into the bored concrete pile hole, fixing the wall protection sleeves through a clamping structure, and forming a support for the bored concrete pile hole; S5, ensuring that the reinforcement cage and the retaining wall sleeve are positioned at the same axial position through the reinforcement cage arranged under the steel pipe upright post, and enabling the reinforcement cage to extend upwards from the bottom of the filling pile hole to a section entering the inner bottom of the steel pipe upright post; s6, screwing the upright post sheath into the ground completely, and tamping the compaction degree of soil around the upright post sheath gradually; S7, pouring concrete into the steel pipe upright post, and forming the steel pipe concrete upright post after the next concrete pouring; and S8, after the concrete is solidified, the column jacket is screwed out, and the steel pipe column is taken out, so that the processing is completed. The invention further provides that the upright post sheath comprises an outer rotary sleeve body, an inner rotary sleeve body and a supporting sleeve body which are sequentially arranged from outside to inside, wherein the outer rotary sleeve body comprises an outer thread, an outer buckle and an outer sleeve body end face, the outer sleeve body end face and the outer buckle are respectively positioned at the upper end and the lower end of the outer thread, the outer thread is gradually decreased from the outer sleeve body end face at the upper end to the outer buckle at the lower end, the outer rotary sleeve body is further provided with an axial through hole and a plurality of grooves, each groove is arranged on the outer thread and the outer buckle, and the grooves are communicated with the axial through hole and the radial outer side of the outer rotary sleeve body so that the outer buckle is provided with a plurality of buckle parts. The inner rotating sleeve body comprises a plurality of inner rotating sleeve body parts, each inner rotating sleeve body part comprises an inner rotating sleeve body stop block and a guide plate, each inner rotating sleeve body stop block is arranged at the lower end of each guide plate, an inner groove is formed in the inner side of each guide plate, an inner clamping groove is formed in each inner rotating sleeve body stop block and located on the outer side of each guide plate, each guide plate is inserted into each axial through hole, and each clamping part is inserted into each inner clamping groove. The support sleeve body comprises an inner main sleeve body and annular protrusions arranged on the inner main sleeve body, the support sleeve body is inserted between the axial through holes and the guide plates, the diameter of the inner main sleeve body is larger than or equal to that of a vertical through hole defined by the four guide plates, the annular protrusions are inserted into the inner grooves, the axial through holes comprise conical hole sections penetrating through the lower ends of the outer rotary sleeve bodies, the inner diameters of the conical hole sections