A method for installing a steel bar of a pile foundation of a sheet pile stone retaining wall in a steep terrain

Abstract

The application discloses a method for installing steel bars of a pile foundation of a sheet pile stone retaining wall under a steep terrain, a plurality of steel bars are placed side by side on the surface of a positioning jig frame, a clamping and positioning assembly is used to fix the plurality of steel bars to form a steel bar row group, a traction rope of a hoisting mechanism is connected to one end of the steel bar row group away from a square pile hole, a top support mechanism is used to support the lower surface of the steel bar row group obliquely upwards, one end of the steel bar row group close to the square pile hole is slid obliquely downwards towards the square pile hole and abuts against the inner wall of the square pile hole, the hoisting mechanism pulls the steel bar row group, the steel bar row group continues to move downwards closely to the inner wall of the square pile hole until the steel bar row group is hung below the hoisting mechanism, and then the steel bar row group is vertically lowered to the bottom of the square pile hole and positioned; the above steps are repeated until four steel bar row groups are hoisted and placed into the square pile hole; the four steel bar row groups are enclosed to form a square steel bar structure, and then the four steel bar row groups are fixed by being bound with stirrups, and the application has the effects of reducing the operation difficulty of binding of the steel bars and the stirrups, shortening the operation time at the hole bottom and improving construction safety.

Description

Technical Field

[0001] This application relates to the field of pile foundation reinforcement installation construction, and in particular to a method for installing reinforcement in sheet pile retaining wall pile foundations in steep terrain. Background Technology

[0002] High mountain and canyon areas are generally prone to high seismic intensity due to the impact of continental plate collisions. Upper-bearing steel arch bridges have advantages such as aesthetic appeal, convenient construction, high structural rigidity, excellent seismic performance, and good environmental adaptability. The main arch, as a load-bearing structure, is naturally suited to the terrain of high-altitude mountain valleys, and therefore, it has been widely used in engineering construction in high-altitude mountainous areas.

[0003] When encountering a deep, incised "V"-shaped canyon with a tunnel beneath it and the bridge site located halfway up the canyon, challenges arise from unfavorable geological conditions such as falling rocks and rock piles. To prevent damage to trees on the canyon slopes from falling rocks during construction, and to ensure the stability of the tunnel entrance slope and the safety of railway operations, a pile-slab retaining wall needs to be designed on the tunnel entrance slope, serving as the construction boundary. The retaining wall uses square piles as its foundation. Due to the steep terrain, positioning construction equipment is difficult, so the pile foundation is excavated manually. Reinforcing steel bars are hoisted manually or using a triangular hand-operated hoist to lower them into the square pile holes. Workers then perform stirrup binding operations at the bottom of the holes, a process that is difficult and time-consuming, posing safety hazards. Therefore, there is room for improvement. Summary of the Invention

[0004] In order to reduce the difficulty of tying the stirrups of the reinforcing bars, shorten the working time at the bottom of the hole, and improve construction safety, this application provides a method for installing the reinforcing bars of the sheet pile retaining wall pile foundation in steep terrain.

[0005] This application provides a method for installing reinforcement bars in sheet pile retaining wall foundations in steep terrain, employing the following technical solution:

[0006] A method for installing reinforcement bars in sheet pile retaining wall foundations in steep terrain includes the following steps:

[0007] S1: Construction preparation: Erect a positioning frame on the outside of the square pile hole, install a top support mechanism inside the positioning frame, and erect a hoisting mechanism above the square pile hole.

[0008] S2: Assemble a row of steel bars: Place several steel bars side by side on the surface of the positioning frame, fix several steel bars with clamping positioning components, and assemble them into a row of steel bars. The traction rope of the hoisting mechanism is connected to the end of the steel bar row away from the square pile hole.

[0009] S3: Top support steel bar assembly: The top support mechanism obliquely supports the lower surface of the steel bar assembly. The end of the steel bar assembly closest to the square pile hole slides obliquely downward toward the square pile hole and abuts against the inner wall of the square pile hole.

[0010] S4: Lifting the steel bar assembly: The lifting mechanism pulls the steel bar assembly, and the steel bar assembly continues to move down close to the inner wall of the square pile hole until it is suspended below the lifting mechanism. Then, the steel bar assembly is vertically lowered to the bottom of the square pile hole.

[0011] S5: Repeat S2 to S4 until the four sets of steel bars are hoisted into the square pile hole; the four sets of steel bars are enclosed to form a square steel structure, and then the four sets of steel bars are tied and fixed with stirrups.

[0012] By adopting the above technical solution, multiple steel bars are first fixed using a positioning jig and clamping positioning components, and then hoisted as a whole in the form of steel bar rows. After hoisting four steel bar rows, the stirrups are tied. There is no need to position the steel bars one by one at the bottom of the square pile hole, which helps to reduce the difficulty of the stirrup tying operation and shortens the time that construction personnel spend working at the bottom of the hole, thus improving construction safety. In addition, by using the upward jacking method of the jacking mechanism and the traction method of the hoisting mechanism's traction rope, the steel bar rows are gradually swung upward from the horizontal state and moved down along the side wall of the square pile hole until the steel bar rows are stably placed into the square pile hole, which helps to improve the stability and efficiency of the steel bar rows during hoisting.

[0013] Preferably, in the construction preparation of S1, a steel plate is pre-installed on one inner wall of the square pile hole away from the formwork; in S3, the top support mechanism obliquely supports the lower surface of the steel bar assembly, and the end of the steel bar assembly near the square pile hole abuts against the surface of the steel plate on the inner wall of the square pile hole.

[0014] Due to the large weight of the steel reinforcement assemblies, the horizontal component of the force exerted on the square pile hole wall during the supporting and pulling process is large, which can easily cause damage to the square pile hole wall. In some cases, the steel reinforcement assemblies may even get stuck between the stones in the square pile hole wall, which is not conducive to the smooth lifting of the steel reinforcement assemblies. By adopting the above technical solution, the steel plate improves the structural strength and flatness of the square pile hole wall, which is conducive to the smooth lifting of the steel reinforcement assemblies and improves the smoothness and stability of the steel reinforcement assemblies lifting process.

[0015] Preferably, in the construction preparation of S1, a side winch is set outside the square pile hole, and the connecting rope of the side winch is connected to the steel plate. The side winch is used to drive the steel plate to rise and fall. During the downward movement of the steel bar group in S4, the steel plate moves with the inclined lower end of the steel bar group.

[0016] Due to the complex terrain of the canyon slope and the long depth of the square pile holes, it is difficult to install steel plates of suitable length on the inner wall of the square pile holes. By adopting the above technical solution, the steel plates are driven to rise and fall by a side winch. Thus, during the downward movement of the S4 rebar assembly, the steel plates move with the inclined lower end of the rebar assembly. This improves the smoothness and stability of the rebar assembly hoisting process, while also reducing the manufacturing and handling costs of the steel plates and the difficulty of steel plate installation.

[0017] Preferably, the clamping and positioning assembly includes two clamping plates arranged opposite each other and a locking member for locking the two clamping plates. Each of the two clamping plates is provided with a plurality of limiting grooves on the side facing each other. The plurality of limiting grooves are spaced apart and correspond one-to-one with a plurality of reinforcing bars. The reinforcing bars are clamped in the mutually facing limiting grooves in the two clamping plates.

[0018] By adopting the above technical solution, the limiting groove plays a positioning role, so that the adjacent steel bars maintain a certain distance. At the same time, the locking device locks the two clamping plates, forcing the two clamping plates to lock several steel bars at the same time. This helps to improve the connection stability between the clamping and positioning component and the steel bars, and makes it easier to stably hoist the steel bars into the square pile hole in rows.

[0019] Preferably, the positioning frame has a plurality of positioning grooves on its surface, the positioning grooves being used to position the reinforcing bars.

[0020] By adopting the above technical solution, the positioning groove is used to position the steel bars to keep them in a parallel state, which facilitates the clamping and positioning components to clamp several steel bars as a whole.

[0021] Preferably, the top support mechanism includes a plurality of jacks, each corresponding to a plurality of reinforcing bars, and the telescopic end of each jack is provided with an arc-shaped plate, which is engaged below the reinforcing bars.

[0022] By adopting the above technical solution, multiple sets of jacks can simultaneously support the steel bar assembly, which helps the steel bar assembly to swing stably upwards and reduces the probability of the steel bar assembly rotating to the side.

[0023] Preferably, in the reinforcement bar assembly jacking step S3, several jacks are installed inside the positioning frame at the end furthest from the square pile hole. These jacks provide initial jacking support to the reinforcement bar assembly, causing the end furthest from the square pile hole to swing upwards. Simultaneously, the hoisting mechanism's traction rope pulls the reinforcement bar assembly, causing it to slide towards the square pile hole and abut against the steel plate surface on the inner wall of the hole. Then, at least two jacks are removed and installed inside the positioning frame at the end closest to the square pile hole. These jacks near the square pile hole provide further jacking support to the reinforcement bar assembly, causing the end furthest from the square pile hole to swing upwards. Simultaneously, the hoisting machine... The traction rope of the hoisting mechanism pulls the steel bar assembly, and the inclined lower end of the steel bar assembly slides down the surface of the steel plate. Then, several jacks that were set away from the square pile hole in the positioning frame are removed and installed at the upper part of the positioning frame near the square pile hole. The jacks at the upper part of the positioning frame near the square pile hole continue to support the steel bar assembly, and the end of the steel bar assembly away from the square pile hole swings upward. At the same time, the traction rope of the hoisting mechanism pulls the steel bar assembly, and the inclined lower end of the steel bar assembly slides down the surface of the steel plate until the center of gravity of the steel bar assembly moves to directly above the square pile hole. The steel bar assembly slides down under its own weight until it is vertically suspended in the square pile hole.

[0024] Due to the canyon environment, only simple hoisting mechanisms can be erected, using jacks to lift the steel reinforcement assemblies. However, the steel reinforcement assemblies are long, and the extension stroke of the jacks is limited, making it difficult to complete the large-angle swinging operation. By adopting the above-mentioned technical solution, several jacks are divided into two groups, which alternately support the steel reinforcement assemblies. While keeping the steel reinforcement assemblies stable, they are driven to gradually swing upwards. With the traction of the hoisting mechanism, the ends of the steel reinforcement assemblies are always in contact with the steel plate on the inner wall of the square pile hole. This helps maintain the stability of the steel reinforcement assemblies during the swinging process and improves the construction safety when the steel reinforcement assemblies are placed.

[0025] Preferably, in the construction preparation of S1, a U-shaped groove is opened in advance on the bottom wall of the square pile hole, and four steel bar groups are inserted into the groove at the bottom of the square pile hole in sequence under the repeated steps of S5, and enclosed to form a square steel bar structure.

[0026] By adopting the above technical solution, the slots play a positioning role, which helps to maintain the vertical and enclosed state of the four groups of steel bars, and facilitates the construction personnel to carry out the stirrup binding work of the four groups of steel bars.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. First, fix multiple steel bars using a positioning jig and clamping positioning components, and then hoist them as a whole in the form of steel bar rows. After hoisting four steel bar rows, tie the stirrups. There is no need to position the steel bars one by one at the bottom of the square pile hole, which helps to reduce the difficulty of tying the stirrups and shortens the time that construction workers spend working at the bottom of the hole, thus improving construction safety. By using the upward jacking method of the jacking mechanism and the traction method of the hoisting mechanism's traction rope, the steel bar rows are gradually swung upward from the horizontal state and moved down along the side wall of the square pile hole until the steel bar rows are stably placed into the square pile hole, which helps to improve the stability and efficiency of hoisting the steel bar rows.

[0029] 2. By setting a steel plate on the side wall of the square pile hole and driving it to rise and fall by a side winch, the steel plate moves with the inclined lower end of the steel bar group during the downward movement of the steel bar group. This improves the smoothness and stability of the steel bar group hoisting process, while also reducing the manufacturing and handling costs of the steel plate and the difficulty of steel plate installation.

[0030] 3. By dividing several jacks into two groups and alternately supporting the steel bar group, while keeping the steel bar group stable, the steel bar group is driven to swing upwards gradually. With the traction of the hoisting mechanism, the end of the steel bar group is always in contact with the steel plate on the inner wall of the square pile hole. This helps to maintain the stability of the steel bar group during the swinging process and improves the construction safety when the steel bar group is placed. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the state of the reinforcing bars in the positioning frame during the installation of the reinforcing bars of the sheet pile retaining wall in steep terrain, according to an embodiment of this application.

[0032] Figure 2 This is a schematic diagram of the initial support state of the sheet pile row during the installation of steel reinforcement in a sheet pile retaining wall pile foundation in a steep terrain according to an embodiment of this application.

[0033] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0034] Figure 4 This is a schematic diagram showing the state of the jacks being placed in two installation cavities in a method for installing the reinforcement of a sheet pile retaining wall in steep terrain, according to an embodiment of this application.

[0035] Figure 5 This is a schematic diagram of the state when the steel sheet assembly is re-supported in a method for installing steel reinforcement in a sheet pile retaining wall under steep terrain, according to an embodiment of this application.

[0036] Figure 6This is a schematic diagram of the state of the steel sheet assembly during the third jacking of the steel sheet assembly in a steel sheet pile retaining wall reinforcement installation method under steep terrain according to an embodiment of this application.

[0037] Figure 7 This is a schematic diagram showing the state of the steel reinforcement group inserted into the slot in a method for installing steel reinforcement in a sheet pile retaining wall under steep terrain, according to an embodiment of this application.

[0038] Explanation of reference numerals in the attached drawings: 1. Positioning frame; 11. Installation cavity; 12. Positioning groove; 2. Rebar row; 3. Square pile hole; 31. Groove; 4. Side winch; 41. Connecting rope; 42. Steel plate; 5. Lifting mechanism; 51. Support; 52. Top winch; 521. Traction rope; 6. Jack; 7. Clamping and positioning assembly; 71. Clamping plate; 72. Locking element; 73. Limiting groove. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0040] This application discloses a method for installing reinforcement bars in sheet pile retaining wall foundations in steep terrain, including the following steps:

[0041] S1: Construction Preparation: Refer to Figure 1 and Figure 2 A positioning frame 1 and a side winch 4 are erected on the outside of the square pile hole 3. A top support mechanism is installed inside the positioning frame 1, and a hoisting mechanism 5 is erected above the square pile hole 3.

[0042] One end of the positioning frame 1 faces the square pile hole 3. Several positioning grooves 12 are opened on the surface of the positioning frame 1, and the positioning grooves 12 correspond one-to-one with several reinforcing bars. The length direction of the positioning grooves 12 is consistent with the length direction of the positioning frame 1. The positioning grooves 12 are evenly distributed along the width direction of the positioning frame 1. The positioning grooves 12 are used to position the reinforcing bars.

[0043] The positioning frame 1 has two mounting cavities 11 at each end. The mounting cavity 11 is used to accommodate the top support mechanism, and the upper end of the mounting cavity 11 is open, from which the top support mechanism can extend.

[0044] In this application, the supporting mechanism includes a plurality of jacks 6, each of which corresponds one-to-one with a plurality of steel bars on the positioning frame 1. In addition, the telescopic end of the jacks 6 is fixed with an arc-shaped plate, the opening of which faces upward, and the arc-shaped plate is used to engage with the lower part of the steel bars.

[0045] The initial installation position of several jacks 6 is located in an installation cavity 11 of the positioning frame 1 away from the square pile hole 3, and the several jacks 6 are tilted towards the square pile hole 3.

[0046] The hoisting mechanism 5 includes a support 51 spanning above the square pile hole 3 and a top winch 52 installed and fixed on the top of the support 51. The support 51 can be fixed by diagonal bracing (not shown in the figure) to improve the overall stability of the hoisting mechanism 5.

[0047] S2: Assembling the rebar assembly 2: Construction workers lift and place several rebars one by one onto the surface of the positioning frame 1, positioning the rebars in the corresponding positioning grooves 12. Two clamping positioning components 7 are then used to fix the rebars, assembling them into a rebar assembly 2. The two clamping positioning components 7 are located at opposite ends of the rebar assembly 2.

[0048] Reference Figure 2 and Figure 3 In this embodiment, the clamping and positioning assembly 7 includes two opposing clamping plates 71 and a locking member 72 for locking the two clamping plates 71. Each of the two clamping plates 71 has a plurality of limiting grooves 73 on its opposite side. These limiting grooves 73 are evenly spaced along the length of the clamping plates 71, and each limiting groove 73 corresponds to a plurality of reinforcing bars on the positioning jig 1. The reinforcing bars are clamped within the opposing limiting grooves 73 in the two clamping plates 71. The locking member 72 is specifically a bolt, and the two clamping plates 71 are locked and fixed by the bolts. The traction rope 521 of the top winch 52 is connected to a clamping and positioning assembly 7 on the reinforcing bar group 2 away from the square pile hole 3.

[0049] In addition, before the hoisting construction is carried out, the construction personnel first move to the bottom of the square pile hole 3 by a lifting platform driven by a winch to carry out the work. The bottom wall of the square pile hole 3 is chiseled in advance in a U-shaped groove 31. Each of the four sides of the groove 31 corresponds to a group of steel bars 2. The ends of the steel bars 2 can be inserted into the corresponding groove 31 to maintain the verticality of the steel bars 2.

[0050] The connecting rope 41 of the side winch 4 is connected to a steel plate 42, and the steel plate 42 is hoisted into the square pile hole 3, with the steel plate 42 abutting against an inner side wall of the square pile hole 3 away from the frame.

[0051] S3: Supporting the Reinforcing Bar Group 2: All jacks 6 provide initial support to the reinforcing bar group 2. The jacks 6 support the lower surface of the reinforcing bar group 2 at an angle upwards from a position away from the square pile hole 3. The arc-shaped plate is clamped onto the reinforcing bars of the reinforcing bar group 2. The end of the reinforcing bar group 2 away from the square pile hole 3 slowly swings upwards. At the same time, the traction rope 521 of the top winch 52 pulls the reinforcing bar group 2. The end of the reinforcing bar group 2 near the square pile hole 3 slides downwards at an angle towards the square pile hole 3 and abuts against the surface of the steel plate 42 on the inner wall of the square pile hole 3. The top winch 52 stops pulling after the jacks 6 reach their maximum extension stroke.

[0052] Reference Figure 4 and Figure 5Then, two jacks 6 are disassembled and installed in the mounting cavity 11 at the end of the positioning frame 1 closest to the square pile hole 3, maintaining the same tilt angle. The two jacks 6 closest to the square pile hole 3 provide further support to the rebar group 2, and the end of the rebar group 2 away from the square pile hole 3 continues to swing upward. At the same time, the traction rope 521 of the top winch 52 pulls the rebar group 2, so that as the tilted upper end of the rebar group 2 continues to swing upward, the tilted lower end of the rebar group 2 slides down along the surface of the steel plate 42. The side winch 4 releases the connecting rope 41 simultaneously, so that the steel plate 42 follows the tilted lower end of the rebar group 2 and descends synchronously. The tilted lower end of the rebar group 2 always abuts against the surface of the steel plate 42, which is beneficial to the stability of the rebar group 2 during swinging. The top winch 52 stops pulling after the jacks 6 reach their maximum extension stroke.

[0053] Reference Figure 6 Then, three jacks 6 located away from the square pile hole 3 are disassembled and installed on the upper part of the positioning frame 1 near the square pile hole 3. Several jacks 6 on the upper part of the positioning frame 1 near the square pile hole 3 continue to support the steel bar group 2. The end of the steel bar group 2 away from the square pile hole 3 swings upward. At the same time, the traction rope 521 of the top winch 52 pulls the steel bar group 2. The inclined lower end of the steel bar group 2 slides down along the surface of the steel plate 42. The side winch 4 releases the connecting rope 41 in sync, so that the steel plate 42 follows the inclined lower end of the steel bar group 2 and descends synchronously.

[0054] S4: Lifting steel bar assembly 2: Refer to Figure 6 and Figure 7 When the center of gravity of the rebar assembly 2 moves directly above the square pile hole 3, the top winch 52 is started again. The rebar assembly 2 slides down under its own weight and the traction of the top winch 52 until it is vertically suspended inside the square pile hole 3. Then, the rebar assembly 2 is vertically lowered to the bottom of the square pile hole 3. Construction workers outside the square pile hole 3 use a hooked rod to hook the traction rope 521 and pull it to one side of the square pile hole 3, so that the rebar assembly 2 is vertically suspended directly above the trench 31. Construction workers at the bottom of the square pile hole 3 correct the position of the rebar assembly 2, and then vertically lower the rebar assembly 2 until its lower end is inserted into the trench 31.

[0055] In other embodiments, the support 51 of the hoisting mechanism 5 is slidably connected to the construction ground outside the square pile hole 3, allowing the hoisting mechanism 5 to slide along the length of the positioning frame 1 to move the rebar assembly 2 directly above the slot 31. It should be noted that when the hoisting mechanism 5 pulls the rebar assembly 2 outside the square pile hole 3, the support 51 and the construction ground need to be fixed to maintain the stability of the hoisting mechanism 5.

[0056] S5: Repeat S2 to S4 until the four sets of reinforcing bars 2 are lowered into the square pile hole 3; the four sets of reinforcing bars 2 form a square reinforcing bar structure, and then the construction workers use stirrups to tie and fix the four sets of reinforcing bars 2. This completes the installation of the reinforcing bars for the rock retaining wall foundation pit.

[0057] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for installing reinforcing steel bars in sheet pile retaining wall foundations in steep terrain, characterized in that: Includes the following steps: S1: Construction preparation: Erect a positioning frame (1) on the outside of the square pile hole (3), install a top support mechanism inside the positioning frame (1), and erect a hoisting mechanism (5) above the square pile hole (3); S2: Assemble a row of steel bars (2): Place several steel bars side by side on the surface of the positioning frame (1), fix several steel bars with the clamping positioning component (7) to assemble a row of steel bars (2), and connect the traction rope (521) of the hoisting mechanism (5) to the end of the steel bar row (2) away from the square pile hole (3). S3: Top support steel bar group (2): The top support mechanism obliquely supports the lower surface of the steel bar group (2) upward. The end of the steel bar group (2) near the square pile hole (3) slides obliquely downward in the direction of the square pile hole (3) and abuts against the inner wall of the square pile hole (3); S4: Lifting the steel bar assembly (2): The hoisting mechanism (5) pulls the steel bar assembly (2), and the steel bar assembly (2) continues to move down close to the inner wall of the square pile hole (3) until it is suspended below the hoisting mechanism (5). Then the steel bar assembly (2) is vertically lowered to the bottom of the square pile hole (3). S5: Repeat S2 to S4 until the four sets of steel bar groups (2) are hoisted into the square pile hole (3) and the four sets of steel bar groups (2) are enclosed to form a square steel bar structure. Then, the four sets of steel bar groups (2) are tied and fixed with stirrups.

2. The method for installing reinforcement bars in sheet pile retaining wall foundations under steep terrain according to claim 1, characterized in that: In the construction preparation of S1, a steel plate (42) is pre-installed on an inner wall of the square pile hole (3) away from the formwork; in S3, the top support mechanism obliquely supports the lower surface of the steel bar group (2), and the end of the steel bar group (2) near the square pile hole (3) abuts against the surface of the steel plate (42) on the inner wall of the square pile hole (3).

3. The method for installing reinforcement bars in sheet pile retaining wall foundations under steep terrain according to claim 2, characterized in that: In the construction preparation of S1, a side winch (4) is set outside the square pile hole (3). The connecting rope (41) of the side winch (4) is connected to the steel plate (42). The side winch (4) is used to drive the steel plate (42) to rise and fall. During the downward movement of the steel bar group (2) in S4, the steel plate (42) moves with the inclined lower end of the steel bar group (2).

4. The method for installing reinforcement bars in sheet pile retaining wall foundations in steep terrain according to claim 1, characterized in that: The clamping and positioning assembly (7) includes two opposing clamping plates (71) and a locking member (72) for locking the two clamping plates (71). Each of the two clamping plates (71) has a number of limiting grooves (73) on one side facing each other. The limiting grooves (73) are spaced apart and correspond one-to-one with a number of reinforcing bars. The reinforcing bars are clamped in the limiting grooves (73) facing each other in the two clamping plates (71).

5. The method for installing reinforcement bars in sheet pile retaining wall foundations under steep terrain according to claim 1, characterized in that: The positioning frame (1) has several positioning grooves (12) on its surface, which are used to position the reinforcing bars.

6. The method for installing reinforcement bars in sheet pile retaining wall foundations in steep terrain according to claim 2, characterized in that: The top support mechanism includes several jacks (6), each of which corresponds to a number of steel bars. The telescopic end of each jack (6) is provided with an arc plate, which is positioned below the steel bars.

7. The method for installing reinforcement bars in sheet pile retaining wall foundations in steep terrain according to claim 5, characterized in that: In the S3 step of supporting the steel bar assembly (2), several jacks (6) are installed inside the end of the positioning frame (1) away from the square pile hole (3). The jacks (6) provide initial support for the steel bar assembly (2), and the end of the steel bar assembly (2) away from the square pile hole (3) swings upward. At the same time, the traction rope (521) of the hoisting mechanism (5) pulls the steel bar assembly (2). Under the pull of the hoisting mechanism (5), the steel bar assembly (2) slides towards the square pile hole (3) and reaches the surface of the steel plate (42) on the inner wall of the square pile hole (3). At least two jacks (6) are removed and installed inside the end of the positioning frame (1) near the square pile hole (3). The jacks (6) near the square pile hole (3) provide further support for the steel bar assembly (2), and the end of the steel bar assembly (2) away from the square pile hole (3) swings upward. At the same time, the traction rope (521) of the hoisting mechanism (5) pulls the steel bar assembly (2). The traction rope (521) pulls the steel bar assembly (2), and the lower inclined end of the steel bar assembly (2) slides down the surface of the steel plate (42). Then, several jacks (6) set away from the square pile hole (3) in the positioning frame (1) are removed and installed at the upper part of the end of the positioning frame (1) near the square pile hole (3). The jacks (6) at the upper part of the end of the positioning frame (1) near the square pile hole (3) continue to support the steel bar assembly (2), and the end of the steel bar assembly (2) away from the square pile hole (3) swings upward. At the same time, the traction rope (521) of the hoisting mechanism (5) pulls the steel bar assembly (2), and the lower inclined end of the steel bar assembly (2) slides down the surface of the steel plate (42) until the center of gravity of the steel bar assembly (2) moves to the top of the square pile hole (3). The steel bar assembly (2) slides down under its own weight until it is vertically suspended in the square pile hole (3).

8. The method for installing reinforcement bars in sheet pile retaining wall foundations in steep terrain according to claim 1, characterized in that: In the construction preparation of S1, a U-shaped groove (31) is opened in advance on the bottom wall of the square pile hole (3). Four steel bar groups (2) are inserted into the groove (31) at the bottom of the square pile hole (3) in sequence under the repeated steps of S5, and enclosed to form a square steel bar structure.

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