Slope reinforcement construction method and reinforcement structure

Abstract

The application discloses a kind of side slope reinforcement construction method and reinforcing structure, wherein side slope reinforcement construction method includes the following steps: S1, construction first side retaining structure;S2, construction first temporary diagonal brace;S3, interval break the bottom plate of retaining wall;S4, first time construction second side retaining structure;The position of first time construction second side retaining structure is the ground position exposed after S3 step interval breaks the bottom plate of retaining wall;S5, construction first permanent diagonal brace, so that first permanent diagonal brace one end is connected retaining wall, one end is connected with the second side retaining structure of S4 step construction completion;S6, remove first temporary diagonal brace, break the bottom plate of remaining part of retaining wall;S7, second time construction second side retaining structure;The position of second time construction second side retaining structure is the ground position exposed after S6 step breaks the bottom plate of remaining part of retaining wall;S8, construction first top support of foundation pit.The side slope reinforcement construction method of the application can guarantee the safety of side slope and adjacent foundation pit.

Description

Technical Field

[0001] This invention belongs to the field of slope reinforcement technology, specifically relating to a slope reinforcement construction method and reinforcement structure. Background Technology

[0002] Currently, with the booming development of underground space engineering in my country, the surrounding environment of foundation pit projects is becoming increasingly complex and diverse. Especially in city centers, due to topographical differences and slopes formed by subsequent road embankments, there are situations where foundation pit projects are adjacent to each other. For this type of foundation pit excavation, the passive zone is prone to resistance loss, and large-scale unloading exacerbates the tendency for shear deformation of the soil outside the pit. When the resistance loss reaches a certain level, due to the imbalance of force and moment, landslides are likely to occur, causing construction accidents. In particular, for slopes supported by L-shaped retaining walls, the construction of the foundation pit retaining structure will damage the effective length of the toe of the L-shaped retaining wall base, causing passive zone weight loss, leading to the overturning or sliding failure of the L-shaped retaining wall at the top of the slope. Damage to the L-shaped retaining wall support will cause slope instability, subsequently affecting the safety of the underlying foundation pit project. Therefore, it is necessary to invent a slope reinforcement construction method that integrates slope reinforcement with the adjacent foundation pit construction process to ensure the safety of the upper slope while also guaranteeing the safety of the foundation pit excavation.

[0003] Therefore, a new technology is needed to address the lack of a slope reinforcement construction method in existing technologies to ensure the safety of slopes and adjacent foundation pits. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a slope reinforcement construction method that can ensure the safety of the slope and adjacent foundation pit. The present invention adopts the following technical solution: A slope reinforcement construction method includes the following steps: S1, Construction of the first side retaining structure; S2, the first temporary diagonal brace during construction, is used to reinforce the retaining wall on the slope side; S3, the base plate of the retaining wall is broken at intervals; S4. First construction of the second side retaining structure; the location of the first construction of the second side retaining structure is the ground exposed after the bottom plate of the retaining wall is broken in step S3. S5. Construct the first permanent diagonal brace, connecting one end of the first permanent diagonal brace to the retaining wall and the other end to the second side retaining structure completed in step S4. S6. Remove the first temporary diagonal brace and break the remaining part of the retaining wall base plate; S7. Second construction of the second side retaining structure; The location of the second side retaining structure during the second construction is the ground exposed after the remaining part of the retaining wall base plate is removed in step S6. S8, the first top support for the construction pit.

[0005] The first retaining structure is far from the slope, while the second retaining structure is adjacent to the slope. The second retaining structure was constructed in two phases.

[0006] Furthermore, the first side retaining structure includes a first side retaining pile, a first side water-stop curtain, and a first side capping beam; Step S1 includes the following steps: S11. First, construct the first side retaining piles; S12, then construct the first side waterstop curtain; S13, the final construction of the first side cap beam.

[0007] Furthermore, the retaining wall is an L-shaped retaining wall; the first temporary diagonal brace is a steel diagonal brace; Step S2 includes the following steps: S21. First, embed steel plates on the side walls and bottom plate of the L-shaped retaining wall using chemical anchors; S22. Weld the two ends of the steel diagonal brace securely to the steel plates embedded in the L-shaped retaining wall. S23. Following steps S21 and S22, steel diagonal bracing is installed every 4 to 6 meters along the longitudinal direction of the L-shaped retaining wall.

[0008] Furthermore, step S3 includes the following steps: S31. Avoid the first temporary diagonal brace and break the bottom plate of the retaining wall; the location where the bottom plate of the retaining wall is broken is the location where a conflict will occur when the second side retaining structure is to be constructed for the first time. S32. Based on step S31, break the bottom plate of the retaining wall sequentially and at intervals, ensuring that the length of each broken area is 3~4m.

[0009] Furthermore, the second side retaining structure includes second side retaining piles, a second side water-stop curtain, and a second side capping beam; Step S4 includes the following steps: S41. Within the area to be demolished for the first time, construct the second side retaining piles first; S42. Construct the second side waterstop curtain; S43. Finally, construct the second side capping beam; ensure that the second side retaining piles can be embedded 100mm into the second side capping beam; reserve steel rebar connectors at both ends of the second side capping beam.

[0010] Furthermore, the first permanent diagonal brace is a concrete diagonal brace; The S5 step includes the following steps: S51. Construct concrete diagonal bracing, connect the first end support reinforcement of the concrete diagonal bracing to the side wall reinforcement of the retaining wall, and anchor the second end support reinforcement of the concrete diagonal bracing into the capping beam of the already constructed second side retaining structure. S52. Based on step S51, install a concrete diagonal brace every 4-6m along the longitudinal direction of the retaining wall, and arrange it at equal intervals with the first temporary diagonal brace.

[0011] Furthermore, step S6 includes the following steps: S61. Along the longitudinal direction of the retaining wall, remove the first temporary diagonal bracing in sequence; S62. Along the longitudinal direction of the retaining wall, the remaining part of the bottom plate of the retaining wall is broken in sequence; the remaining part of the bottom plate is the bottom plate that will cause conflict when the second side retaining structure is constructed for the second time, and the remaining part of the bottom plate includes the bottom plate at the position vacated after the first temporary diagonal brace is removed.

[0012] Furthermore, the second side retaining structure includes second side retaining piles, a second side water-stop curtain, and a second side capping beam; Step S7 includes the following steps: S71. In the second demolition area (i.e., the area after the remaining bottom slab of the retaining wall is demolished), the second side retaining piles shall be constructed first. S72. Construct the second side waterstop curtain; S73. Finally, construct the second side capping beam to ensure its continuous connection with the second side capping beam of the second side retaining structure constructed in the first stage.

[0013] Furthermore, the first top support is a first concrete support; Step S8 includes the following steps: S81. Construct the first concrete support, connecting one end of the first concrete support to the capping beam of the first side retaining structure and the other end of the first concrete support to the capping beam of the second side retaining structure, while ensuring that the central axis of the first concrete support and the central axis of the first permanent diagonal brace are in the same vertical plane. S82. Based on step S81, the first concrete support is installed sequentially along the longitudinal direction of the first side retaining structure.

[0014] Another objective of this invention is to provide a reinforcement structure that provides systematic support for the slope based on the basic framework of the foundation pit engineering, which can protect the safety of both the slope and the foundation pit adjacent to the slope.

[0015] A reinforcement structure includes an enclosure structure, a first permanent diagonal brace, and a first top support; The enclosure structure includes a first side enclosure structure and a second side enclosure structure; The first side retaining structure is far from the slope; The first side retaining structure includes a first side retaining pile, a first side water-stop curtain, and a first side capping beam; The first side retaining pile is located underground; the first side water-stop curtain is located on one side of the first side retaining pile; the first side capping beam is located on the top of the first side retaining pile, and the top of the first side capping beam is flush with the top of the first side water-stop curtain. The second side retaining structure is adjacent to the slope; the second side retaining structure is constructed sequentially after the bottom slab of the retaining wall blocking the slope is broken off one after another. The second side retaining structure includes second side retaining piles, a second side water-stop curtain, and a second side capping beam; The second side retaining pile is located underground, parallel to the first side retaining pile, and maintains a set distance from the first side retaining pile; the second side water-stop curtain is located on one side of the second side retaining pile; the second side capping beam is located on the top of the second side retaining pile, and the top of the second side capping beam is flush with the top of the second side water-stop curtain. The top of the first side waterstop curtain is flush with the top of the second side waterstop curtain, and the tops of both reach the ground; One end of the first permanent diagonal brace is connected to the side wall of the retaining wall that blocks the slope, and the other end of the first permanent diagonal brace is connected to the second side capping beam; The first permanent diagonal brace is provided in several units, and is arranged at a set interval along the longitudinal direction of the second side cap beam; The first top support is connected at one end to the first side crown beam and at the other end to the second side crown beam, and the central axis of the first top support and the central axis of the first permanent diagonal brace are in the same vertical plane; The first top support is provided with several of them, which are arranged at a set interval along the longitudinal direction of the first side crown beam.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The slope reinforcement construction method of the present invention first constructs a first-side retaining structure away from the slope to lay the foundation for subsequent works; then, a first temporary diagonal brace is installed to provide temporary support for the retaining wall, and the bottom plate of the retaining wall that interferes with the construction of the second-side retaining structure is broken off for the first time; then, the second-side retaining structure adjacent to the slope is constructed for the first time; then, a first permanent diagonal brace is installed to establish a support relationship between the side wall of the retaining wall and the second-side retaining structure; then, the first temporary diagonal brace is removed, and the remaining part of the bottom plate of the retaining wall that interferes with the construction of the second-side retaining structure is broken off; the second-side retaining structure adjacent to the slope is constructed for the second time. Thus, the second-side retaining structure is constructed twice to form a complete second-side retaining structure adjacent to the slope; finally, a first top support is established to connect it with the first-side retaining structure away from the slope, forming the basic framework of the foundation pit. This invention ensures the smooth construction of the retaining structure for the foundation pit project by setting up a first temporary diagonal brace, alternately breaking down the bottom plate of the retaining wall and constructing the second side retaining structure, and setting up a first permanent diagonal brace during the process. The connection between the first permanent diagonal brace and the retaining structure effectively establishes a support system for the retaining wall, avoiding the risk of slope collapse and endangering adjacent foundation pits due to the reduced support area and weakened bearing capacity of the bottom plate after its removal. The slope reinforcement construction method of this invention ensures the safety of the slope and adjacent foundation pits.

[0017] The present invention provides a reinforcement structure that connects a first permanent diagonal brace with the retaining structure of the foundation pit project to form a system. This system can effectively provide support for the slope, avoid the situation where the retaining wall base plate is broken and the retaining wall support is insufficient, protect the safety of the slope, and also protect the safety of the adjacent foundation pit. The reinforcement structure of the present invention can be applied to projects where right-angle slopes are blocked by L-shaped retaining walls and the slope is adjacent to the foundation pit. Attached Figure Description

[0018] The technology of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a flowchart illustrating the slope reinforcement construction method. Figure 2 This is a schematic diagram of the reinforced structural facade; Figure 3 This is a top view of the first side retaining structure and the first temporary diagonal bracing constructed using slope reinforcement methods. Figure 4 This is a top view of the base slab of the retaining wall being broken down in the first stage using the slope reinforcement construction method; Figure 5 This is a top view of the second side retaining structure and the connection between the first permanent diagonal brace and the second side retaining structure in the area of ​​the first demolition using the slope reinforcement construction method. Figure 6This is a top view of the construction method used to remove the remaining part of the retaining wall base slab and to install a second side retaining structure in the area of ​​the second removal; Figure 7 This is a top view of the first top support being installed using slope reinforcement construction methods; Figure 8 This is a schematic diagram of a steel plate embedded in a retaining wall using chemical anchors. Figure 9 yes Figure 8 A front view of the steel plate.

[0019] Figure label: 1-First side retaining structure; 11-First side retaining piles; 12-First side water-stop curtain; 13-First side capping beam; 2-Second side retaining structure; 21-Second side retaining piles; 22-Second side water-stop curtain; 23-Second side capping beam; 3-First temporary diagonal brace; 4-Slope; 5-Retaining wall; 51-Side wall; 52-Base slab; 521-First demolition area; 522-Remaining part (later becoming the second demolition area); C-Longitudinal direction; 6-First permanent diagonal brace; 7 - First top support; 8-First steel support.

[0020] 91-Chemical anchor; 92-Steel plate. Detailed Implementation

[0021] The following will provide a clear and complete description of the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of the present invention. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The same reference numerals used throughout the accompanying drawings indicate the same or similar parts.

[0022] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. Furthermore, the descriptions of "up," "down," "left," and "right" used in this invention are only relative to the relative positional relationships of the various components of the invention in the accompanying drawings.

[0023] Reference Figures 1 to 9 A slope reinforcement construction method includes the following steps: S1, Construction of the first side retaining structure 1; S2, the first temporary diagonal brace 3, is used to reinforce the retaining wall 5 on the side of the slope; S3, the base plate 52 of the retaining wall is broken at intervals; S4, First construction of the second side retaining structure 2; The location of the second side retaining structure 2 during the first construction is the ground exposed after the bottom plate of the retaining wall is broken off in step S3; S5. Construct the first permanent diagonal brace 6, so that one end of the first permanent diagonal brace 6 is connected to the retaining wall 5 and the other end is connected to the second side retaining structure 2 completed in step S4. S6. Remove the first temporary diagonal brace 3 and break the remaining part of the retaining wall base plate 52; S7, Second construction of the second side retaining structure 2; The location of the second side retaining structure 2 during the second construction is the ground exposed after the remaining part of the retaining wall base plate is removed in step S6; S8, the first top support of the construction pit 7.

[0024] The first side retaining structure 1 is far from the slope 4, and the second side retaining structure 2 is adjacent to the slope 4. The second side retaining structure 2 was constructed in two phases.

[0025] In one embodiment, the first side retaining structure 1 includes a first side retaining pile 11, a first side water-stop curtain 12, and a first side capping beam 13; Step S1 includes the following steps: S11, First construct the first side retaining pile 11; S12, then construct the first side waterstop curtain 12; S13, the last construction of the first side cap beam 13.

[0026] In one embodiment, the retaining wall 5 is an L-shaped retaining wall; the first temporary diagonal brace 3 is a steel diagonal brace; Step S2 includes the following steps: S21. First, steel plates 92 are embedded in the side walls 51 and bottom plate 52 of the L-shaped retaining wall using chemical anchors 91. In one embodiment, the chemical anchors 91 are M20×260mm in size and have an anchoring length of 160mm. In one embodiment, the steel plates 92 are made of Q235B material, have a thickness of 20mm, and have a planar dimension of 800mm×800mm.

[0027] S22. Weld the two ends of the steel diagonal brace securely to the steel plate 92 embedded in the L-shaped retaining wall. S23. Following steps S21 and S22, steel diagonal bracing is installed every 4 to 6 meters along the longitudinal direction C of the L-shaped retaining wall. The angle between the steel diagonal bracing and the bottom plate 52 of the retaining wall is in the range of 45° to 60°.

[0028] In one embodiment, step S3 includes the following steps: S31, Avoid the first temporary diagonal brace 3 and break the retaining wall base plate 52; the location of breaking the retaining wall base plate 52 is the location where the first construction of the second side retaining structure 2 will cause conflict; S32. Based on step S31, break the retaining wall base plate 52 sequentially and at intervals, ensuring that the length of each broken area is 3~4m.

[0029] In one embodiment, the second side retaining structure 2 includes a second side retaining pile 21, a second side water-stop curtain 22, and a second side capping beam 23; Step S4 includes the following steps: S41. Within the first demolition area 521, first construct the second side retaining piles 21; S42, then construct the second side waterstop curtain 22; S43. Finally, construct the second side capping beam 23; ensure that the second side retaining pile 21 can be embedded 100mm into the second side capping beam 23; reserve steel rebar connectors at both ends of the second side capping beam 23 for subsequent capping beam connection.

[0030] In one embodiment, the first permanent diagonal brace 6 is a concrete diagonal brace; The S5 step includes the following steps: S51. Construct concrete diagonal bracing, connect the first end support reinforcement of the concrete diagonal bracing to the side wall 51 of the retaining wall 5, and anchor the second end support reinforcement of the concrete diagonal bracing into the capping beam of the constructed second side retaining structure 2. S52. Based on step S51, a concrete diagonal brace is installed at intervals of 4 to 6 m along the longitudinal direction C of the retaining wall 5, and it is arranged at equal intervals with the first temporary diagonal brace 3; the angle between the concrete diagonal brace and the bottom plate 52 of the retaining wall 5 is in the range of 45° to 60°.

[0031] In one embodiment, step S6 includes the following steps: S61. Along the longitudinal direction C of the retaining wall 5, remove the first temporary diagonal brace 3 in sequence; S62. Along the longitudinal direction C of the retaining wall 5, the remaining part 522 bottom plate of the retaining wall 5 is broken in sequence; the remaining part 522 bottom plate is the bottom plate that will cause conflict when the second side retaining structure 2 is constructed for the second time, and the remaining part 522 bottom plate includes the bottom plate at the position vacated after the first temporary diagonal brace 3 is removed.

[0032] In one embodiment, the second side retaining structure 2 includes a second side retaining pile 21, a second side water-stop curtain 22, and a second side capping beam 23; Step S7 includes the following steps: S71. In the second demolition area (i.e., the area after the remaining bottom slab of the retaining wall is demolished), the second side retaining piles 21 are constructed first. S72, then construct the second side waterstop curtain 22; S73. Finally, construct the second side capping beam 23 to ensure its continuous connection with the second side capping beam of the second side retaining structure 2 constructed in the first stage.

[0033] In one embodiment, the first top support 7 is a first concrete support; Step S8 includes the following steps: S81. Construct the first concrete support, so that one end of the first concrete support is connected to the capping beam of the first side retaining structure 1, and the other end of the first concrete support is connected to the capping beam of the second side retaining structure 2, while ensuring that the central axis of the first concrete support and the central axis of the first permanent diagonal brace are in the same vertical plane. S82. Based on step S81, the first concrete support is installed sequentially along the longitudinal direction C of the first side retaining structure 1.

[0034] The slope reinforcement construction method of this invention first uses steel diagonal braces to temporarily reinforce the L-shaped retaining wall, then intermittently removes a portion of the bottom slab of the L-shaped retaining wall to construct the second side retaining structure 2 for the first time. Next, the second side capping beam 23 of the retaining structure is poured simultaneously with the concrete diagonal braces, forming a permanent reinforcement support for the retaining wall sidewall 51. Then, the steel diagonal braces are removed, and the remaining retaining wall bottom slab that interferes with the construction of the retaining structure is removed. Finally, the second side retaining structure 2 is constructed for the second time, forming a complete second side retaining structure 2. This method allows for the smooth construction of the foundation pit project's base frame while avoiding the risk of slope collapse caused by removing the retaining wall bottom slab. The steel diagonal braces, as temporary components, are easy to install and remove and can be reused; the concrete diagonal braces, as permanent components, are durable, have reliable joint connections, and strong load-bearing capacity. The combined use of steel and concrete diagonal braces, depending on the construction method, allows the second side retaining structure to be implemented in two stages, avoiding the construction risk of slope collapse caused by removing the toe of the retaining wall bottom slab during foundation pit construction.

[0035] Another objective of this invention is to provide a reinforcement structure that provides systematic support for the slope 4 based on the basic framework of the foundation pit project, which can protect the safety of the slope 4 as well as the foundation pit project of the adjacent slope.

[0036] Reference Figure 2 and Figure 7 A reinforced structure includes an enclosure structure, a first permanent diagonal brace 6, and a first top support 7; The enclosure structure includes a first side enclosure structure 1 and a second side enclosure structure 2; The first side retaining structure 1 is far from the slope 4; The first side retaining structure 1 includes a first side retaining pile 11, a first side water-stop curtain 12, and a first side capping beam 13; The first side retaining pile 11 is located underground; the first side water-stop curtain 12 is located on one side of the first side retaining pile 11; the first side capping beam 13 is located on the top of the first side retaining pile 11, and the top of the first side capping beam 13 is flush with the top of the first side water-stop curtain 12. The second side retaining structure 2 is adjacent to the slope 4; the second side retaining structure 2 is constructed sequentially after the bottom plate 52 of the retaining wall blocking the slope is broken off one after another. The second side retaining structure 2 includes a second side retaining pile 21, a second side water-stop curtain 22, and a second side capping beam 23; The second side retaining pile 21 is located underground, parallel to the first side retaining pile 11, and maintains a set distance from the first side retaining pile 11; the second side water-stop curtain 22 is located on one side of the second side retaining pile 21; the second side capping beam 23 is located on the top of the second side retaining pile 21, and the top of the second side capping beam 23 is flush with the top of the second side water-stop curtain 22. The top of the first side water-stop curtain 12 is flush with the top of the second side water-stop curtain 22, and both of their tops reach the ground; One end of the first permanent diagonal brace 6 is connected to the side wall 51 of the retaining wall that blocks the slope, and the other end of the first permanent diagonal brace 6 is connected to the second side cap beam 23; The first permanent diagonal brace 6 is provided in several units and is arranged at a set interval along the longitudinal direction C of the second side cap beam 23; One end of the first top support 7 is connected to the first side crown beam 13, and the other end is connected to the second side crown beam 23. The central axis of the first top support 7 and the central axis of the first permanent diagonal brace 6 are in the same vertical plane. The first top support 7 is provided in several parts, and is arranged at a set interval along the longitudinal direction C of the first side crown beam 13.

[0037] In one embodiment, the foundation pit is subsequently excavated, and a first steel support 8 is connected between the first side retaining structure 1 and the second side retaining structure 2. The first steel support 8 is made of Q235B, has a diameter of 609mm, and a wall thickness of 16mm. During the excavation of the foundation pit, measures are retained to monitor the dynamics of the slope 4.

[0038] In one embodiment, the retaining wall 5 is an L-shaped retaining wall, which is a reinforced concrete structure used for slope 4 support.

[0039] In one embodiment, the first temporary diagonal brace 3 is a steel diagonal brace made of Q235B material, with a diameter of 609mm and a wall thickness of 16mm.

[0040] In one embodiment, the first permanent diagonal brace 6 is a concrete diagonal brace, which is a reinforced concrete structure using C35 concrete, and the cross-sectional dimensions of the concrete diagonal brace are 600mm × 800mm.

[0041] In one embodiment, the retaining piles (including the first side retaining pile 11 and the second side retaining pile 21) are reinforced concrete structures, and the concrete used is C35 concrete.

[0042] In one embodiment, the capping beam (including the first side capping beam 13 and the second side capping beam 23) is a reinforced concrete structure, and the concrete used is C35 concrete; the cross-sectional dimensions of the capping beam are 600mm × 800mm.

[0043] In one embodiment, the water-stop curtain (including the first water-stop curtain 12 and the second water-stop curtain 22) is located outside the retaining piles; the length of the top of the water-stop curtain to the ground meets the requirements for anti-seepage stability.

[0044] In one embodiment, the first top support 7 is a first concrete support, the first concrete support is a reinforced concrete structure, the concrete is C35 concrete, and the cross-sectional dimensions of the first concrete support are 600mm × 800mm.

[0045] Other aspects of the slope reinforcement construction method and reinforcement structure described in this invention are found in the prior art and will not be repeated here.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A slope reinforcement construction method, characterized in that, Includes the following steps: S1, Construction of the first side retaining structure; S2, the first temporary diagonal brace during construction, is used to reinforce the retaining wall on the slope side; S3. The base slab of the retaining wall is broken at intervals; the retaining wall is an L-shaped retaining wall used for slope protection; the retaining wall includes side walls and a base slab. Step S3 includes the following steps: S31. Avoid the first temporary diagonal brace and break through the bottom plate of the retaining wall; the location where the bottom plate of the retaining wall is broken is the location where the second side retaining structure will be constructed for the first time; S32. Based on step S31, break the bottom plate of the retaining wall sequentially and at intervals; S4. First construction of the second side retaining structure; the location of the first construction of the second side retaining structure is the ground exposed after the bottom plate of the retaining wall is broken in step S3. S5. Construct the first permanent diagonal brace, connecting one end of the first permanent diagonal brace to the retaining wall and the other end to the second side retaining structure completed in step S4. S6. Remove the first temporary diagonal brace and break the remaining part of the retaining wall base plate; S7. Second construction of the second side retaining structure; The location of the second side retaining structure during the second construction is the ground exposed after the remaining part of the retaining wall base plate is removed in step S6. S8, the first top support of the construction pit; The first retaining structure is far from the slope, while the second retaining structure is adjacent to the slope.

2. The slope reinforcement construction method according to claim 1, characterized in that, The first side retaining structure includes a first side retaining pile, a first side water-stop curtain, and a first side capping beam; Step S1 includes the following steps: S11. First, construct the first side retaining piles; S12, then construct the first side waterstop curtain; S13, the final construction of the first side cap beam.

3. The slope reinforcement construction method according to claim 1, characterized in that, The first temporary diagonal brace is a steel diagonal brace; Step S2 includes the following steps: S21. First, embed steel plates on the side walls and bottom plate of the L-shaped retaining wall using chemical anchors; S22. Weld the two ends of the steel diagonal brace securely to the steel plates embedded in the L-shaped retaining wall. S23. Following steps S21 and S22, steel diagonal bracing is installed every 4 to 6 meters along the longitudinal direction of the L-shaped retaining wall.

4. The slope reinforcement construction method according to claim 1, characterized in that, The second side retaining structure includes second side retaining piles, second side water-stop curtain, and second side capping beam; Step S4 includes the following steps: S41. Within the area to be demolished for the first time, construct the second side retaining piles first; S42. Construct the second side waterstop curtain; S43. Finally, construct the second side capping beam; ensure that the second side retaining piles can be embedded 100mm into the second side capping beam; reserve steel rebar connectors at both ends of the second side capping beam.

5. The slope reinforcement construction method according to claim 1, characterized in that, The first permanent diagonal brace is a concrete diagonal brace; Step S5 includes the following steps: S51. Construct concrete diagonal bracing, connect the first end support reinforcement of the concrete diagonal bracing to the side wall reinforcement of the retaining wall, and anchor the second end support reinforcement of the concrete diagonal bracing into the capping beam of the already constructed second side retaining structure. S52. Based on step S51, install a concrete diagonal brace every 4-6m along the longitudinal direction of the retaining wall, and arrange it at equal intervals with the first temporary diagonal brace.

6. The slope reinforcement construction method according to claim 1, characterized in that, Step S6 includes the following steps: S61. Along the longitudinal direction of the retaining wall, remove the first temporary diagonal bracing in sequence; S62. Along the longitudinal direction of the retaining wall, break off the remaining part of the bottom plate of the retaining wall in sequence; the remaining part of the bottom plate is the bottom plate of the location where the second side retaining structure will be constructed for the second time.

7. The slope reinforcement construction method according to claim 1, characterized in that, The second side retaining structure includes second side retaining piles, second side water-stop curtain, and second side capping beam; Step S7 includes the following steps: S71. Within the area to be demolished for the second time, the second side retaining piles shall be constructed first. S72. Construct the second side waterstop curtain; S73. Finally, construct the second side capping beam to ensure its continuous connection with the second side capping beam of the second side retaining structure constructed in the first stage.

8. The slope reinforcement construction method according to claim 1, characterized in that, The first top support is the first concrete support; Step S8 includes the following steps: S81. Construct the first concrete support, connecting one end of the first concrete support to the capping beam of the first side retaining structure and the other end of the first concrete support to the capping beam of the second side retaining structure, while ensuring that the central axis of the first concrete support and the central axis of the first permanent diagonal brace are in the same vertical plane. S82. Based on step S81, the first concrete support is installed sequentially along the longitudinal direction of the first side retaining structure.

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