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KR-102963986-B1 - Retaining wall method using guide blocks

KR102963986B1KR 102963986 B1KR102963986 B1KR 102963986B1KR-102963986-B1

Abstract

The present invention relates to an earth retaining method using guide blocks, wherein a pair of guide blocks with guide grooves formed on their front surfaces are embedded facing each other and spaced apart above the ground, thereby accurately maintaining the verticality of the drilled hole and the steel reinforcement during drilling and guiding the installation position of the steel reinforcement. The present invention relates to a method for constructing an earth retaining wall by forming a bore hole in the ground and filling the bore hole with grout material, comprising: (a) a step of excavating a portion of the upper ground at the location where the earth retaining wall is to be installed, and then burying a pair of guide blocks, each having an arc-shaped guide groove formed on its front surface with a diameter corresponding to the diameter of the bore hole, in the upper ground so as to face each other and be spaced apart; (b) a step of continuously drilling the ground between the facing and spaced-apart guide blocks to form two rows of bore holes that are mutually connected in the lateral direction and overlap each other in the front and rear directions, and then inserting a guide pipe, having an arc-shaped guide groove formed on its front surface, into the bore hole so as to be connected to the front surface of the guide groove of the rear guide block, and inserting a steel pipe reinforcement formed by welding a pair of steel pipe units front and rear into the bore hole through the space between the guide groove of the guide pipe and the guide groove of the front guide block; and (c) a step of constructing an earth retaining wall by filling the bore hole with grout material. Includes

Inventors

  • 강민수
  • 이준태
  • 박진수

Assignees

  • 케이에이치건설 주식회사
  • 진영산업개발 주식회사

Dates

Publication Date
20260513
Application Date
20250822

Claims (7)

  1. The method is for constructing a retaining wall (2) by forming a bore hole (10) in the ground (1) and then filling the bore hole (10) with grout material (4). (a) After excavating a portion of the upper part of the ground (1) at the location where the earth retaining wall (2) is to be installed, a pair of guide blocks (3a, 3b) are installed on the upper part of the ground (1) such that they face each other and are spaced apart, with an arc-shaped guide groove (31a, 31b) formed on the front surface having a diameter corresponding to the diameter of the drilled hole (10); (b) a step of continuously drilling the ground (1) between the guide blocks (3a, 3b) that are spaced apart from each other and facing each other to form two rows of drilled holes (10) that are mutually connected in the lateral direction and overlap each other in the front and rear directions, and then inserting a guide tube (5b) having an arc-shaped guide groove (51b) formed on its front surface into the drilled holes (10) so as to be connected to the front surface of the guide groove (31a) of the rear guide block (3a), and inserting a steel pipe reinforcing body (6) formed by welding a pair of steel pipe units (60) in the front and rear directions into the drilled holes (10) through the space between the guide groove (51b) of the guide tube (5b) and the guide groove (31b) of the front guide block (3b); and (c) a step of constructing a retaining wall (2) by filling the above-mentioned bore hole (10) with grout material (4); a retaining wall construction method using a guide block characterized by including:
  2. The method is for constructing a retaining wall (2) by forming a bore hole (10) in the ground (1) and then filling the bore hole (10) with grout material (4). (a) After excavating a portion of the upper part of the ground (1) at the location where the earth retaining wall (2) is to be installed, a pair of guide blocks (3a, 3b) are installed on the upper part of the ground (1) such that they face each other and are spaced apart, with an arc-shaped guide groove (31a, 31b) formed on the front surface having a diameter corresponding to the diameter of the drilled hole (10); (b) continuously drilling the ground (1) between the guide blocks (3a, 3b) that are spaced apart from each other to form two rows of drilled holes (10) that are mutually connected in the lateral direction and overlap each other in the front and rear directions, and then inserting a steel pipe reinforcing body (6), which is formed by welding a pair of steel pipe units (60) front and rear and has a vertical guide protrusion (61) formed on the rear side that is guided by the guide groove (31a) of the rear guide block (3a), into the drilled holes (10) such that the steel pipe units (60) are spaced apart from the guide groove (31a) of the rear guide block (3a) and connected to the guide groove (31b) of the front guide block (3b); and (c) a step of constructing a retaining wall (2) by filling the above-mentioned bore hole (10) with grout material (4); a retaining wall construction method using a guide block characterized by including:
  3. In paragraph 1, The above step (b) is characterized by drilling a one-sided drilling hole (10a) in conjunction with a guide groove (31a) of a one-sided guide block (3a), and inserting a guide tube (5a) having an arc-shaped guide groove (51a) formed on its front surface into the one-sided drilling hole (10a) to drill a other-sided drilling hole (10b) between the guide groove (51a) of the guide tube (5a) and the guide groove (31b) of the other-sided guide block (3b).
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  7. In Paragraph 3, A method for earth retaining using a guide block, characterized in that, in step (b) above, after installing the guide pipes (5a, 5b), a support (7) is installed to connect the upper end of the guide pipes (5a, 5b) and the upper surface of the guide block (3b) to fix the position of the guide pipes (5a, 5b).

Description

Retaining wall method using guide blocks The present invention relates to an earth retaining method using guide blocks, wherein a pair of guide blocks with guide grooves formed on their front surfaces are embedded facing each other and spaced apart above the ground, thereby accurately maintaining the verticality of the drilled hole and the steel reinforcement during drilling and guiding the installation position of the steel reinforcement. When excavating ground for the construction of underground structures, retaining walls are constructed first to prevent surrounding soil or water from flowing into the site and to prevent settlement of the surrounding ground and adjacent structures. Earth retaining methods for constructing earth retaining walls include the sheet pile method, steel sheet pile method, and continuous underground wall method. In particular, among underground continuous wall construction methods, the continuous pile earth retaining wall method, which constructs an earth retaining wall by continuously installing concrete piles in situ, is widely used at construction sites because it produces less noise and vibration compared to conventional driven piles, has greater rigidity than the sheet pile method resulting in less deformation under earth pressure, and is cheaper than the slurry wall method. These pile-type earth retaining methods include the SCW (Soil Cement Wall) method and the CIP (Cast In Place pile) method. The SCW method utilizes a multi-axis auger to bore into the ground and creates a soil-cement wall within the soil by ejecting cement grout from the tip and mixing it with the excavated soil. Due to the high water-impermeability of the soil-cement wall, it forms a relatively high-quality retaining wall even in cohesive soil. The CIP method involves drilling the ground with an earth auger, inserting a steel mesh into the drilled hole, and then filling it with concrete to form a pile in place. In the column-type earth retaining wall construction method, steel reinforcing members such as H-shaped steel are often embedded in a portion of the borehole to reinforce the flexural rigidity of the earth retaining wall (Registered Patent No. 10-1633840). At this time, if the verticality of the borehole or steel reinforcement is not accurately maintained, it is difficult to install the tie beams installed on the front of the earth retaining wall. Consequently, the tie beams do not adhere properly to the earth retaining wall, resulting in an imbalance in earth pressure support, and the load acts unevenly on the tie beams, making them structurally disadvantageous. In addition, brackets installed on the front of the earth retaining wall for the construction of the tie beam are generally welded to the front of the steel reinforcement. To achieve this, the steel reinforcement must be installed eccentrically from the inside of the earth retaining wall inward so that it is exposed to the front of the earth retaining wall. However, if the steel reinforcement is embedded outward or the verticality is incorrect, it is difficult to expose the steel reinforcement to the front of the retaining wall. FIG. 1 is a perspective view illustrating a guide block. FIGS. 2 to 4 are drawings illustrating the step-by-step process of an earth retaining method using the guide block of the present invention. FIG. 5 is a plan view illustrating a state in which perforated holes are formed in two rows. FIG. 6 is a perspective view illustrating a guide tube for drilling. FIG. 7 is a perspective view illustrating the installation process of a drilling guide tube. FIG. 8 is a perspective view illustrating the state in which a drilling guide tube is installed. FIG. 9 is a perspective view illustrating the state in which the other side hole is drilled. FIG. 10 is a perspective view illustrating a steel pipe reinforcement composed of a pair of steel pipe units. FIG. 11 is a plan view illustrating the state in which a steel pipe reinforcement is constructed. FIG. 12 is a perspective view illustrating a guide tube for a steel pipe reinforcement. FIG. 13 is a perspective view illustrating the installation process of a steel pipe reinforcement using a guide tube for the steel pipe reinforcement. FIG. 14 is a perspective view illustrating a steel pipe reinforcing member equipped with a guide projection. FIG. 15 is a perspective view illustrating the installation process of a support. FIG. 16 is a plan view illustrating the fixed state of a drilling guide tube by means of a support. FIG. 17 is a plan view illustrating the fixed state of a guide tube for a steel pipe reinforcement by a support. FIG. 18 is a plan view illustrating the fixed state of a pair of guide blocks by a support. The present invention will be described in detail below according to the attached drawings and preferred embodiments. FIG. 1 is a perspective view illustrating a guide block, and FIG. 2 to 4 are drawings illustrating the step-by-step process of an earth reta