Steel-concrete combined type sheet-pile wall structure and construction method

Abstract

The invention provides a steel-concrete combined type sheet-pile wall structure and a construction method, relates to a sheet-pile wall construction technology, and particularly discloses a first steel cage combined structure and a second steel cage combined structure which are installed in stages, and a distribution beam and a corrugated plate which are located on the back side of the structure. The pile holes and the steel pipes are filled with concrete, and the formwork erecting and dismantling procedures are omitted; the steel cage combined structure and the filled concrete have a synergistic effect, so that the structural rigidity and the bending and shearing resistance are improved; a first reinforcement cage, a first reinforcing reinforcement cage and a first steel pipe in a pile hole are structurally combined with concrete to form a reinforcing area, and pile body stress concentration at an earth-stone interface is effectively reduced; the distribution beam and the breast board are both of a steel structure, the construction safety is high, and the progress of follow-up procedures such as breast board installation and wall back backfilling can be accelerated. The pile-slab wall has the remarkable advantages of being small in pile body section size, small in burial depth, high in bending resistance and shear resistance, large in retaining height, low in safety risk and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of pile-sheet wall construction, and in particular to a steel-concrete combined pile-sheet wall structure and a construction method. Background Art

[0002] Pile-and-sheet walls are lightweight retaining structures commonly used in railway, highway, water conservancy, and municipal engineering applications, such as fill roadbed support, excavation slope reinforcement, and landslide control. Existing pile-and-sheet walls utilize reinforced concrete structures and are primarily categorized by cross-sectional form: square and round piles. Reinforced concrete piles generally have larger cross-sectional dimensions. Pile-and-sheet wall retaining walls are typically constructed using precast or cast-in-place reinforced concrete retaining panels.

[0003] Square piles are affected by the shape of the openings, and some pile foundations buried underground often use traditional manual bored pile construction technology. During the construction of their cantilever sections, it is necessary to tie steel bars section by section and install formwork before pouring concrete. This has low construction efficiency and extremely high safety risks. Although round piles are fast to construct, their bending and shear resistance are far lower than square piles, so their cantilever sections are often shorter and cannot be used in retaining projects with large retaining heights.

[0004] The retaining wall can only be constructed after the pile concrete reaches a certain strength. Due to size limitations, the prefabricated retaining wall has a small installation height. The cast-in-place retaining wall needs to go through the process of steel bar and formwork production, concrete pouring, demolding and curing, and reach a certain strength before the wall backfill can be implemented. The work efficiency is low and the construction period is long. Summary of the Invention

[0005] The object of the present invention is to provide a steel-concrete combined pile-sheet wall structure and a construction method, which can solve the problems raised by the above-mentioned background technology in view of the shortcomings of the existing technology.

[0006] The technical solution of the present invention is achieved as follows: The present invention provides a steel-concrete combined pile-sheet wall structure, comprising: a first steel cage combined structure installed in a pile hole, comprising a first steel pipe, a first steel cage, and a first reinforcing steel cage; the first steel pipe is installed inside the first steel cage; the first reinforcing steel cage is installed in the first steel pipe; and first concrete is poured into the first steel pipe; The second steel cage assembly structure includes a second steel pipe and a second reinforcing steel cage; the second reinforcing steel cage is connected to the first reinforcing steel cage; the second steel pipe is sleeved on the outside of the second reinforcing steel cage and fixedly connected to the first steel pipe; the second concrete is poured into the second steel pipe; Distribution beams are located between the exposed ground portion of the first steel pipe and the second steel pipe and the supported compacted material, extending horizontally to the first and second steel pipes at both ends, and are arranged vertically in a plurality of rows; The corrugated plate is located between the distribution beam and the fill, and is distributed on one side of the distribution beam.

[0007] Furthermore, the diameter of the pile hole is 400 mm to 500 mm larger than the outer diameter of the first steel pipe, and the outer diameter of the first reinforcing steel cage is 200 mm smaller than the outer diameter of the first steel pipe.

[0008] Furthermore, the top of the first steel pipe is at least 300 mm above the ground; the top of the first reinforcing steel cage is 1.0 m higher than the top of the first steel pipe.

[0009] Furthermore, the outer diameter of the second reinforcing steel cage is 200 mm smaller than the outer diameter of the second steel pipe.

[0010] Furthermore, the horizontal height of the joint between the first concrete and the second concrete is lower than the horizontal height of the joint between the first steel pipe and the second steel pipe.

[0011] Furthermore, the horizontal height of the joint between the second steel pipe and the first steel pipe is lower than the horizontal height of the joint between the second reinforcing steel cage and the first reinforcing steel cage.

[0012] Furthermore, the inner walls of the first steel pipe and the inner walls of the second steel pipe are welded with ship-shaped steel bars at intervals; the ship-shaped steel bars are welded and fixed to the first reinforcing steel cage and the second reinforcing steel cage respectively.

[0013] Furthermore, the top surface of the concrete surrounding the outer side of the first steel cage assembly structure is flush with the ground.

[0014] Furthermore, the distribution beam is fixed to the adjacent first steel pipe and the adjacent second steel pipe by welding, and the distribution beam is fixed to the corrugated plate by bolts.

[0015] A construction method for a steel-concrete combined pile-sheet wall structure comprises the following steps: S1. Locate and determine the pile center hole position, and excavate the pile hole to the pile bottom elevation; S2. Install the first steel cage assembly structure; The main reinforcement of the first steel cage is welded along the longitudinal direction of the outer wall of the first steel pipe in the first steel cage assembly structure, and the spiral stirrups of the first steel cage are installed after completion. The overlap length of the first steel cage and the first steel pipe is 3.0m; S3, hoisting the connected first steel pipe and the first reinforcement cage into the pile hole, with a portion of the first steel pipe exposed from the pile hole, and aligning the first steel cage assembly structure with the pile center in place, temporarily supporting and fixing the first steel pipe exposed from the pile hole; S4, hoisting the first reinforcing steel cage into the first steel pipe and extending the top of the first reinforcing steel cage out of the top of the first steel pipe; S5. pouring first concrete into the first steel pipe using a conduit method; S6. The top concrete of the first steel cage assembly structure is roughened, the surface is cleaned and cured. After the concrete reaches 70% of the design strength grade, the temporary support of the first steel pipe is removed and preparations are made for the installation of the second steel cage assembly structure. S7, hoisting the second reinforcing steel cage and fixing it to the first reinforcing steel cage; S8, installing the second steel pipe in the second reinforcing steel cage to the periphery of the second reinforcing steel cage, and welding the second steel pipe to the first steel pipe; S9, pouring the second concrete into the second steel pipe using a conduit method; S10. Install the distribution beam and the corrugated plate layer by layer from bottom to top. The distribution beam and the second steel pipe are fixed by welding, and the distribution beam and the corrugated plate are fixed by bolts. S11. Implement backfilling of the wall.

[0016] Compared with the existing reinforced concrete pile-sheet wall structure, the present invention has the following advantages: (1) In terms of construction efficiency and safety, the pile body of the present invention has a small cross-sectional size and a small burial depth, and the pile hole can be excavated and formed quickly; the pile body adopts a steel tube concrete structure, which eliminates the process of template support and removal, and has high construction efficiency; the distribution beam and retaining plate (steel corrugated plate) are both steel structures, which are highly safe and help to speed up the subsequent processes such as retaining plate installation and wall backfill. (2) In terms of structural design, the present invention combines the steel pipe with the reinforced steel cage to improve the structural rigidity and bending and shear resistance; the first steel cage extends to the ground to form a reinforced area, which effectively reduces the stress concentration of the pile body at the soil-rock interface; the steel cage, steel pipe and concrete are staggered (staggered joints) to avoid overlapping weak points / areas and improve the integrity of the structure; the steel corrugated plate and H-shaped steel distribution beam combination has good stress resistance and strong anti-pushing ability, and can evenly transfer landslide or fill loads to the pile body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the installation structure diagram of the steel-concrete combined pile-sheet wall structure in the present invention.

[0018] Figure 2 It is a side view of the steel-concrete combined pile-sheet wall structure of the present invention.

[0019] Figure 3 It is a schematic diagram of the installation structure of the corrugated plate and the distribution beam in the present invention.

[0020] Figure 4 Schematic diagram of the construction structure of the first steel cage combination structure in the present invention.

[0021] Figure 5 Schematic diagram of the construction structure of the second steel cage combination structure in the present invention.

[0022] Figure numerals: 1. pile hole; 2. first steel cage assembly structure; 3. first steel cage; 4. first steel pipe; 5. first reinforcing steel cage; 6. second steel cage assembly structure; 7. second steel pipe; 8. second reinforcing steel cage; 9. distribution beam; 10. corrugated plate. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0025] Example The present invention provides a steel-concrete combined pile-sheet wall structure, such as Figure 1-Figure 5 As shown, it includes a first steel cage assembly structure 2 installed in a pile hole 1, including a first steel pipe 4, a first steel cage 3 and a first reinforcing steel cage 5; the first steel pipe 4 is installed inside the first steel cage 3; the first reinforcing steel cage 5 is installed in the first steel pipe 4; the first concrete is poured into the first steel pipe 4; The second steel cage assembly structure 6 includes a second steel pipe 7 and a second reinforcing steel cage 8; the second reinforcing steel cage 8 is connected to the first reinforcing steel cage 5; the second steel pipe 7 is sleeved on the outside of the second reinforcing steel cage 8 and fixedly connected to the first steel pipe 4; the second concrete is poured into the second steel pipe 7; Distribution beams 9 are located between the exposed portion of the first steel pipe 4 and the second steel pipe 7 and the supported compacted material, extending horizontally to the first steel pipe 4 and the second steel pipe 7 at both ends, and are arranged in a plurality of rows vertically; The corrugated plate 10 is located between the distribution beam 9 and the compacted material, and is distributed on one side of the distribution beam 9 .

[0026] When installing the above structure, it is necessary to stake out the pile core hole position; mechanically excavate the pile hole 1 to the pile bottom elevation to inspect the pile hole 1; and clean the scum in the pile hole 1 to increase the bonding between the concrete and the bedrock of the pile hole 1.

[0027] Ship-shaped steel bars are welded to the inner wall of the first steel pipe 4, and the main bars of the first steel cage 3 are welded to the outer wall of the first steel pipe 4 along its longitudinal direction. After completion, the spiral stirrups of the first steel cage 3 are installed. The overlap length of the first steel cage 3 and the first steel pipe 4 is 3.0m.

[0028] Then, the connected first reinforcement cage 3 and the first steel pipe 4 are hoisted into the pile hole 1 by mechanical hoisting equipment, and the first reinforcement cage 3 is brought into contact with the bottom of the pile hole 1 so that a portion of the first steel pipe 4 is exposed to a height of at least 300 mm from the pile hole 1. Then, the first steel pipe 4 exposed from the pile hole 1 is temporarily supported and fixed.

[0029] The first reinforcing steel cage 5 is then hoisted into the first steel tube 4, with the top surface of the first reinforcing steel cage 5 at least 1.0m above the top surface of the first steel tube 4. The bottom of the first reinforcing steel cage 5 is then flush with the bottom of the first steel cage 3. The first reinforcing steel cage 5 is then welded to the ship-shaped steel bars on the inner wall of the first steel tube 4. This arrangement effectively reduces the pile stress concentration that can easily occur at the soil-rock interface after the first concrete is poured, thereby improving the structural rigidity and bending and shear resistance.

[0030] The conduit method is used to pour concrete into the first steel tube 4. When the first concrete is poured into the first steel tube 4, the top surface of the first concrete inside the first steel tube 4 is 200 mm lower than the top surface of the first steel tube 4. The top surface of the concrete surrounding the outer surface of the first steel cage assembly 2 is flush with the ground. This design facilitates installation of the second steel cage assembly 6. The first concrete is self-compacting, slightly expansive concrete.

[0031] Before installing the second steel cage assembly structure 6, the top surface of the first concrete needs to be roughened and cured, after which the corresponding components of the second steel cage assembly structure 6 can be installed. The second reinforcing steel cage 8 is hoisted above the first steel pipe 4, arranged coaxially with the first reinforcing steel cage 5, and extended to the first reinforcing steel cage 5 via a steel bar connecting sleeve. The second steel pipe 7 is then installed, extending the first steel pipe 4 around the periphery of the second reinforcing steel cage 8. The first reinforcing steel cage 5 and the second steel pipe 7 are then welded and secured using ship-shaped steel bars. The first and second steel cage assemblies 2 and 6 are installed in stages, achieving modular construction of the anti-slip piles, reducing the difficulty of individual construction, the number of assembly times, and the overall construction time.

[0032] The second concrete also adopts self-compacting micro-expansive concrete and is poured into the top of the second steel pipe 7 at one time by using the conduit method.

[0033] A distribution beam 9 is provided between the exposed ground portion of the first steel pipe 4 and the second steel pipe 7 and the supported compacted mass; the distribution beam 9 is welded and fixed to the first steel pipe 4 and the second steel pipe 7 respectively; a corrugated plate 10 is provided between the distribution beam 9 and the compacted mass, and the distribution beam 9 and the corrugated plate 10 are fixed with bolts.

[0034] Preferably, the lower end of the distribution beam 9 is supported by a corbel, which is welded and fixed to the second steel pipe 7; the corbel has the effect of limiting the position of the distribution beam 9 and preventing it from overturning.

[0035] Subsequently, the original ground steps are excavated and then backfilled layer by layer.

[0036] Preferably, the distribution beam 9 is made of H-shaped steel, and the corrugated plate 10 is made of steel plate; bolt holes are respectively provided on the distribution beam 9 and the corrugated plate 10 for bolt connection between the distribution beam 9 and the corrugated plate 10.

[0037] Furthermore, the diameter of the pile hole 1 is 400 mm to 500 mm larger than the outer diameter of the first steel pipe 4 , and the outer diameter of the first reinforcing steel cage 5 is 200 mm smaller than the outer diameter of the first steel pipe 4 .

[0038] Furthermore, the top of the first steel pipe 4 is at least 300 mm above the ground; the top of the first reinforcing steel cage 5 is 1.0 m above the top of the first steel pipe 4 .

[0039] Furthermore, the outer diameter of the second reinforcing steel cage 8 is 200 mm smaller than the outer diameter of the second steel pipe 7 .

[0040] Furthermore, the horizontal height of the joint between the first concrete and the second concrete is lower than the horizontal height of the joint between the first steel pipe 4 and the second steel pipe 7 .

[0041] Furthermore, the horizontal height of the joint between the second steel pipe 7 and the first steel pipe 4 is lower than the horizontal height of the joint between the second reinforcing steel cage 8 and the first reinforcing steel cage 5 .

[0042] Furthermore, the top surface of the concrete surrounding the outer side of the first steel cage assembly structure 2 is flush with the ground.

[0043] The joint between the second steel tube 7 and the first steel tube 4 is staggered with the joint between the second reinforcing steel cage 8 and the first reinforcing steel cage 5 to avoid overlapping structural weaknesses, improve overall shear strength, and enhance the ability of the first and second steel cage structures 2 and 6 to resist deformation and displacement of weak structural surfaces at the joint. The second concrete pour ensures that the concrete in the second steel tube 7 flows into the first steel tube 4 and that the top surface of the second concrete in the second steel tube 7 is flush with the top surface of the second steel tube 7. The second concrete fills the first steel tube 4, forming a continuous load-bearing structure and improving the strength and rigidity of the pile-sheet wall.

[0044] Furthermore, ship-shaped steel bars are welded to the inner walls of the first steel tube 4 and the inner walls of the second steel tube 7 at intervals; the ship-shaped steel bars are welded to the first reinforcing steel cage 5 and the second reinforcing steel cage 8, respectively. The first steel tube 4 and the first reinforcing steel cage 5, as well as the second steel tube 7 and the second reinforcing steel cage 8, are connected by ship-shaped steel bars welded to the inner walls of the first steel tube 4 or the second steel tube 7, respectively. This improves the overall performance of the steel tubes and the steel cages. The ship-shaped steel bars also enhance the bonding between the first reinforcing steel cage 5, the second reinforcing steel cage 8, the first steel tube 4, and the second steel tube 7 and the filled concrete.

[0045] Furthermore, the distribution beam 9 is fixed to the first steel pipe 4 and the second steel pipe 7 by welding, and the distribution beam 9 is fixed to the corrugated plate 10 by bolts.

[0046] Preferably, the exposed steel materials such as the first steel pipe 4, the second steel pipe 7, the distribution beam 9, the corrugated plate 10 are made of weathering steel to avoid the steel from rusting during long-term use, which may lead to a decrease in the compressive strength.

[0047] Preferably, a tension anchor structure connected to the inner filling body can be provided on the outer wall of the second steel pipe 7 to improve the bending, tensile and deformation resistance of the pile body.

[0048] A steel-concrete combined pile-sheet wall construction method comprises the following steps: S1. Locate and determine the pile center hole position, and excavate pile hole 1 to the pile bottom elevation; S2, installing the first steel cage assembly structure 2; The main reinforcement of the first reinforcement cage 3 is welded along the longitudinal direction of the outer wall of the first steel pipe 4 in the first steel cage assembly structure 2. After completion, the spiral stirrups of the first reinforcement cage 3 are installed. The overlap length of the first reinforcement cage 3 and the first steel pipe 4 is 3.0m. S3, hoisting the connected first steel pipe 4 and the first reinforcement cage 3 into the pile hole 1, with a portion of the first steel pipe 4 exposed from the pile hole 1, and aligning the first steel cage assembly structure 2 with the pile center in place, temporarily supporting and fixing the first steel pipe 4 exposed from the pile hole 1; S4, hoisting the first reinforcing steel cage 5 into the first steel pipe 4 and making the top of the first reinforcing steel cage 5 extend out of the top of the first steel pipe 4; S5. Pour the first concrete into the first steel pipe 4 using a conduit method; S6. The top concrete of the first steel cage assembly structure 2 is roughened, the surface is cleaned and cured. After the concrete reaches 70% of the design strength grade, the temporary support of the first steel pipe 4 is removed and the second steel cage assembly structure 6 is prepared for installation; S7, hoisting the second reinforcing steel cage 8 and fixing it to the first reinforcing steel cage 5; S8, installing the second steel pipe 7 in the second reinforcing steel cage 8 to the periphery of the second reinforcing steel cage 8, and welding the second steel pipe 7 to the first steel pipe 4; S9, pouring the second concrete into the second steel pipe 7 using the conduit method; S10. Install the distribution beam 9 and the corrugated plate 10 layer by layer from bottom to top. The distribution beam 9 is fixed to the first steel pipe 4 and the second steel pipe 7 by welding, and the distribution beam 9 is fixed to the corrugated plate 10 by bolts. After installing the distribution beam 9 layer by layer, the corrugated plate 10 is connected to the distribution beam 9 by bolts. The corrugated plate 10 can better withstand the soil pressure, and the load is evenly transferred to the pile body through the distribution beam 9, thereby improving the resistance of the structure to the fill body.

[0049] S11. Implement backfilling of the wall.

[0050] The technical advantages brought by the present invention are as follows: in terms of construction efficiency and safety, the cross-sectional size of the pile body of the present invention is small, the burial depth is small, and the excavation and forming of the pile hole 1 is fast; the pile body adopts a steel tube concrete structure, which eliminates the process of template support and dismantling, and has high construction efficiency; the distribution beam 9 and the retaining plate (steel corrugated plate 10) are both steel structures, which are highly safe and help to speed up the subsequent processes such as retaining plate installation and wall backfill. In terms of structural design, the present invention combines the steel pipe with the reinforced steel cage to improve the structural rigidity and bending and shear resistance; the first steel cage 3 extends to the ground to form a reinforced area, which effectively reduces the stress concentration of the pile body at the soil-rock interface; the steel cage, steel pipe and concrete are staggered (staggered joints) to avoid overlapping weak points / areas and improve the integrity of the structure; the steel corrugated plate 10 and the H-shaped steel distribution beam 9 are well-stressed and have strong anti-pushing ability, and can evenly transfer landslide or fill loads to the pile body.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A steel-concrete combined pile-sheet wall structure, characterized in that: include: A first steel cage assembly structure (2) installed in the pile hole (1) comprises a first steel pipe (4), a first steel cage (3) and a first reinforcing steel cage (5); the first steel pipe (4) is installed inside the first steel cage (3); the first reinforcing steel cage (5) is installed inside the first steel pipe (4); and first concrete is filled in the first steel pipe (4); The second steel cage assembly structure (6) comprises a second steel pipe (7) and a second reinforcing steel cage (8); the second reinforcing steel cage (8) is connected to the first reinforcing steel cage (5); the second steel pipe (7) is sleeved on the outside of the second reinforcing steel cage (8) and fixedly connected to the first steel pipe (4); and the second concrete is poured into the second steel pipe (7); A plurality of distribution beams (9) are arranged between the exposed portion of the first steel pipe (4) and the second steel pipe (7) and the supported fill, with both ends of the distribution beams (9) extending horizontally to the ends of the first steel pipe (4) and the second steel pipe (7), and the plurality of distribution beams (9) are arranged vertically in a plurality of rows; The corrugated plate (10) is located between the distribution beam (9) and the built-up body, and is arranged on one side of the distribution beam.

2. The steel-concrete combined pile-sheet wall structure according to claim 1, characterized in that: The diameter of the pile hole (1) is 400 mm to 500 mm larger than the outer diameter of the first steel pipe (4), and the outer diameter of the first reinforcing steel cage (5) is 200 mm smaller than the outer diameter of the first steel pipe (4).

3. The steel-concrete combined pile-sheet wall structure according to claim 2, characterized in that: The top of the first steel pipe (4) is at least 300 mm above the ground; the top of the first reinforcing steel cage (5) is 1.0 m above the top of the first steel pipe (4).

4. The steel-concrete combined pile-sheet wall structure according to claim 3, characterized in that: The outer diameter of the second reinforcing steel cage (8) is 200 mm smaller than the outer diameter of the second steel pipe (7).

5. The steel-concrete combined pile-sheet wall structure according to claim 4, characterized in that: The horizontal height of the joint between the first concrete and the second concrete is lower than the horizontal height of the joint between the first steel pipe (4) and the second steel pipe (7).

6. The steel-concrete combined pile-sheet wall structure according to claim 5, characterized in that: The horizontal height of the joint between the second steel pipe (7) and the first steel pipe (4) is lower than the horizontal height of the joint between the second reinforcing steel cage (8) and the first reinforcing steel cage (5).

7. A steel-concrete combined pile-sheet wall structure according to any one of claims 1 to 6, characterized in that: The inner wall of the first steel pipe (4) and the inner wall of the second steel pipe (7) are both welded with ship-shaped steel bars at intervals; the ship-shaped steel bars are respectively welded and fixed to the first reinforcing steel cage (5) and the second reinforcing steel cage (8).

8. The steel-concrete combined pile-sheet wall structure according to claim 1, characterized in that: The top surface of the concrete surrounding the outside of the first steel cage assembly structure (2) is flush with the ground.

9. The steel-concrete combined pile-sheet wall structure according to claim 1, characterized in that: The distribution beam (9) is fixed to the adjacent first steel pipe (4) and second steel pipe (7) by welding, and the distribution beam (9) is fixed to the corrugated plate (10) by bolts.

10. A construction method for a steel-concrete combined pile-sheet wall structure, characterized in that: The steps include: S1. Lofting and determining the pile center hole position, excavating the pile hole (1) to the pile bottom elevation; S2, installing the first steel cage assembly structure (2); The main reinforcement of the first reinforcement cage (3) is welded to the outer wall of the first steel pipe (4) in the first steel cage assembly structure (2) along its longitudinal direction, and after completion, the spiral stirrups of the first reinforcement cage (3) are installed, and the overlap length of the first reinforcement cage (3) and the first steel pipe (4) is 3.0m; S3, hoisting the connected first steel pipe (4) and the first steel cage (3) into the pile hole (1), partially exposing the first steel pipe (4) to the pile hole (1), and aligning the first steel cage assembly structure (2) with the pile center in place, and temporarily supporting and fixing the first steel pipe (4) exposed to the pile hole (1); S4, hoisting the first reinforcing steel cage (5) into the first steel pipe (4) and allowing the top of the first reinforcing steel cage (5) to extend out of the top of the first steel pipe (4); S5, pouring the first concrete into the first steel pipe (4) using a conduit method; S6, the top concrete of the first steel cage composite structure (2) is roughened, the surface is cleaned and cured, and after the concrete reaches 70% of the design strength grade, the temporary support of the first steel pipe (4) is removed and the second steel cage composite structure (6) is prepared for installation; S7, hoisting the second reinforcing steel cage (8) and fixing it to the first reinforcing steel cage (5); S8, installing the second steel pipe (7) in the second reinforcing steel cage (8) on the periphery of the second reinforcing steel cage (8), and welding the second steel pipe (7) to the first steel pipe (4); S9, pouring the second concrete into the second steel pipe (7) using a conduit method; S10, installing the distribution beam (9) and the corrugated plate (10) layer by layer from bottom to top, the distribution beam (9) and the second steel pipe (7) are respectively fixed by welding, and the distribution beam (9) and the corrugated plate (10) are fixed by bolts; S11. Implement backfilling of the wall.

Images