Composite retaining wall structure and construction method

Abstract

The present application relates to the technical field of slope protection, in particular to a composite retaining wall structure and construction method. The specific technical scheme is as follows: a composite retaining wall structure comprises cast-in-place piles arranged on both sides of the edge of the slope body, a plurality of fixed blocks are connected to one side of the cast-in-place piles, a plurality of movable blocks are detachably connected between the cast-in-place piles and between the two fixed blocks arranged correspondingly, and the fixed blocks and the movable blocks are fixed by I-beams in the vertical direction. The present application solves the problem of poor durability and firmness of the existing self-embedded retaining wall.

Description

Technical Field

[0001] This invention relates to the field of slope protection technology, specifically to a composite retaining wall structure and construction method. Background Technology

[0002] Retaining walls are structures commonly used to support roadbed fill, hillside soil, and prevent deformation of the fill soil on sloping terrain, thus preventing collapse and landslides. Currently used retaining walls are generally constructed from monolithic reinforced concrete blocks, offering excellent strength, but they are prone to cracking over time. Because they are integrally installed, repairs after cracking are extremely difficult, leading to increased maintenance costs. Addressing these problems, a self-embedding retaining wall has emerged. This type of retaining wall is formed by dry-laying single-row blocks in staggered layers, with upper and lower layers nested vertically to restrict horizontal displacement. However, under significant horizontal thrust, the blocks may tilt outwards, pushing apart upper and lower blocks and causing soil seepage, or even detaching from the wall surface, resulting in wall failure. Furthermore, uneven slopes and varying inclination angles result in inconsistent horizontal thrust resistance across the entire retaining wall, making it even more susceptible to damage. Furthermore, maintenance and repairs can cause the surrounding blocks to loosen, resulting in poor durability and strength of the retaining wall, and making it impossible to plant vegetation on the retaining wall. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a composite retaining wall structure and construction method, which solves the problems of poor durability and robustness of existing self-embedded retaining walls.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] This invention discloses a composite retaining wall structure, including cast-in-place piles arranged on both sides of the slope edge. One side of each cast-in-place pile is connected to a plurality of fixed blocks. A plurality of movable blocks are detachably connected between the cast-in-place piles and between two corresponding fixed blocks. Vertically, the fixed blocks and the movable blocks are fixed together by I-beams.

[0006] Preferably, one end of the fixed block is provided with at least one connecting bar, and the other end is provided with at least one connector. The connecting bar is fixed to the cast-in-place pile, and the connector is connected to the movable block through a connecting sleeve.

[0007] Preferably, the movable block has through holes at both ends along its length, and a steel cable is installed in the through hole. The two ends of the steel cable extend out of the through hole, and the two ends of the steel cable are provided with threads adapted to the connecting sleeve. The movable block and the fixed block, as well as the movable blocks and the movable blocks are connected by the connecting sleeve.

[0008] Preferably, a hanging ring or hook is provided at the center of the connection end between the fixed block and the movable block, and one end of the movable block is rotatably provided with a hook and the other end is provided with a hanging ring; when connected, the hanging ring and the hook correspond to each other.

[0009] Preferably, the contact positions of the hanging ring and the hook after they are engaged are respectively provided with notches, and the hanging ring is connected to both the movable block and the fixed block by threads.

[0010] Preferably, the movable block and the fixed block, as well as the movable blocks and the fixed blocks, are respectively positioned by snap-fit ​​connectors. One end of the movable block and the other end of the fixed block connected to one of the cast-in-place piles are provided with grooves, and a positioning rod is vertically arranged in the grooves. The other end of the movable block and the other end of the fixed block connected to another cast-in-place pile are provided with the snap-fit ​​connectors. The grooves and snap-fit ​​connectors are correspondingly arranged, and the snap-fit ​​connectors are interference-fitted with the positioning rods.

[0011] Preferably, the snap-fit ​​component includes a fixing cylinder embedded in the other end of the movable block and the other end of the fixed block connected to another cast-in-place pile. A fixing rod is inserted into the fixing cylinder and connected by a spring. The other end of the fixing rod extends out of the fixing cylinder and is interference-fitted with the positioning rod by a positioning head.

[0012] Preferably, the positioning head is U-shaped, with its open end facing the positioning rod; symmetrical strip holes are provided on both sides of the positioning head, a rotating shaft is vertically arranged in the strip holes, and a baffle is rotatably arranged on the rotating shaft. The two baffles abut against each other at one end inside the positioning head. An elastic element is provided in the strip holes, and one end of the elastic element is connected to the side wall near the other end of the baffle; the positioning head is provided with a groove for interference fit with the positioning rod.

[0013] Preferably, the fixing rod has a fixing hole through it, and the movable block and the fixed block have positioning holes that communicate with the groove. A screw is installed in the positioning hole, and the screw extends into the groove, passes through the fixing hole, and extends into the bottom of the groove.

[0014] Accordingly, a construction method for a composite retaining wall structure includes the following steps:

[0015] (1) Open channels along the slope on both sides of the slope, with the channels being larger than the diameter of the cast-in-place piles;

[0016] (2) First, fix one row of fixed blocks, place a casting mold in one of the channels, place a reinforcing cage in the casting mold, and set insertion holes for inserting connecting bars on the side wall of the casting mold. The connecting bars on the fixed blocks extend into the reinforcing cage, and a limiting rod is inserted into the end of the connecting bar. Pour concrete into the casting mold; set multiple positioning blocks on the outer wall of the reinforcing cage that abut against the inner wall of the casting mold.

[0017] (3) Connect the fixed block to the other end of the movable block through the hanging ring and the hook of the movable block, and adjust the distance between the two by rotating the hanging ring. During the connection process, insert the fixing rod into the groove at the same time. Connect other movable blocks in this way until the last fixed block is connected, and fix another column of fixed blocks according to steps (1) and (2).

[0018] (4) Fix the fixed blocks and movable blocks with connecting sleeves.

[0019] The present invention has the following beneficial effects:

[0020] This invention uses multiple flexible connections to fix the slope, which can withstand the thrust of the slope on the blocks to a certain extent without causing them to break. Furthermore, because each block is connected by hooks, clips, and steel cables, multiple connections ensure that even if any component is damaged, the block will not fall off. The detachable connection method also facilitates block replacement. Simultaneously, the cast-in-place pile foundations on both sides of the slope better adapt to the slope environment. The entire installation process is simple and convenient, and vegetation can be planted in the area between the I-beams, providing a greening effect and enhancing aesthetics. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the connection structure between the snap-fit ​​component and the positioning rod.

[0023] Figure 3 This is a structural diagram of the hook and loop;

[0024] Figure 4 This is a schematic diagram of the connecting sleeve structure;

[0025] Figure 5 This is a schematic diagram of the end face of the movable block;

[0026] Figure 6 This is a schematic diagram of the rib cage structure;

[0027] Figure 7 A schematic diagram of the casting mold structure;

[0028] Figure 8 This is a structural schematic diagram of the end of the connecting rib;

[0029] In the diagram: 1. Fixed block; 2. Movable block; 3. I-beam; 4. Connecting rib; 5. Connecting head; 6. Connecting sleeve; 7. Through hole; 8. Steel cable; 9. Hanging ring; 10. Hook; 11. Notch; 12. Groove; 13. Positioning rod; 14. Fixing cylinder; 15. Fixing rod; 16. Spring; 17. Positioning head; 18. Strip hole; 19. Baffle; 20. Elastic element; 21. Slot; 22. Fixing hole; 23. Casting mold; 24. Reinforcing cage; 25. Insertion hole; 26. Limiting rod; 27. Positioning block; 28. L-shaped angle steel; 29. ​​Anchor rod; 30. Partition plate; 31. Bearing; 32. Limiting block; 33. Gasket; 34. Ring plate; 35. Conical rod; 36. Grab hook. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Unless otherwise specified, the technical means used in the implementation examples are conventional means well known to those skilled in the art.

[0032] refer to Figures 1-8 This invention discloses a composite retaining wall structure, comprising cast-in-place piles correspondingly arranged on both sides of the slope edge. The cast-in-place piles are positioned on both sides of the slope so that fixed and movable masonry blocks between the piles cover the entire slope surface. The fixed masonry blocks connected to the two cast-in-place piles have certain differences and their structures are not entirely identical. (Refer to...) Figure 1 As shown, taking the fixed block on the right as an example, the snap-fit ​​component is installed on the fixed block on this side, and the hook is also installed on this block. The specific setup can be adjusted according to the actual situation, such as the position and orientation of each component. Both the fixed and movable blocks are precast concrete blocks, and each block contains reinforcing steel bars.

[0033] Furthermore, to increase the gripping ability of the movable and fixed blocks, hooks 36 are provided at the bottom of the movable and fixed blocks. The hooks are strip-shaped and arranged along the length of the block. Preferably, two hooks are provided in this invention, and they are parallel to each other with the hooks facing the same direction. In use, the hooks are positioned with the hooks facing downwards.

[0034] Based on the cast-in-place pile on the left, multiple fixed blocks 1 are connected along the length of one side of the cast-in-place pile. Multiple movable blocks 2 are detachably connected between the cast-in-place piles and between corresponding fixed blocks 1. That is, multiple movable blocks 2 are connected sequentially along the fixed blocks 1, finally ending with another fixed block and the cast-in-place pile (the cast-in-place pile and fixed blocks on the right). To ensure the stability of the fixed and movable blocks, I-beams 3 are used for vertical fixation between the fixed blocks 1 and between the movable blocks 2, which can alleviate block slippage to some extent. Figure 1 As shown, the masonry blocks between the two cast-in-place piles are arranged in multiple rows (horizontal rows), with each row fixed by I-beams 3. Vegetation can be planted between the I-beams in each horizontal row. At the lowest point of the slope, the bottom of the movable block 2 and the fixed block 1 are provided with L-shaped angle steel 28. One side of the L-shaped angle steel is fixed to the fixed block and the movable block by bolts, and the other end is nailed into the slope by anchor rods 29 to increase the stability of the masonry blocks.

[0035] Furthermore, one end of the fixed block 1 is provided with at least one connecting rib 4, and the other end is provided with at least one connector 5, which is threaded. The connecting rib 4 is fixed to the cast-in-place pile, and the connector 5 is connected to the movable block 2 through a connecting sleeve 6. The connecting sleeve 6 is provided with internal threads and can be threadedly connected to the connector 5.

[0036] Furthermore, through holes 7 are provided at both ends of the movable block 2 along its length direction, and steel cables 8 are provided in the through holes 7. The number of steel cables is the same as the number of connectors and they are correspondingly arranged. The two ends of the steel cables 8 extend out of the through holes 7 respectively, and the steel cables are fitted with the through holes with a clearance, so that the steel cables can slide in the through holes. The two ends of the steel cables 8 are provided with threads that are adapted to the connecting sleeves 6. The movable block 2 and the fixed block 1, as well as the movable blocks 2 and the movable blocks 2 are connected by the connecting sleeves 6.

[0037] Furthermore, a partition 30 is provided in the middle of the connecting sleeve 6 to control the length of the steel cable and connector extending into the connecting sleeve. As a preferred embodiment, the diameter of the threaded ends of the steel cable can be larger than the inner diameter of the through hole 7, which can prevent the steel cable from falling out of the through hole and ensure that the steel cable always moves within the through hole. The direction of the threads on both sides of the partition inside the connecting sleeve is based on the direction in which the connector and steel cable move towards the inside of the connecting sleeve when the sleeve is rotated. If two movable blocks are connected, the direction is based on the direction in which the steel cables on different movable blocks move towards the inside of the connecting sleeve when the connecting sleeve is rotated. It should be noted that the steel cable has a certain deformation capacity, and the through hole is preferably located near the bottom of the movable block so that when the steel cable is taut, the movable block can be well attached to the slope. At the same time, the connectors and connecting bars on the fixed block are located in the same positions as the reinforcing bars to avoid the dispersion of forces on the fixed block and the movable block.

[0038] Furthermore, although movable blocks and fixed blocks, as well as movable blocks among themselves, can be connected and fixed using steel cables and connectors, once the steel cables and connecting sleeves or connectors are disconnected, the movable blocks will lose their protection of the slope. Therefore, to strengthen the fixation of fixed and movable blocks, a hanging ring 9 or hook 10 is provided at the center of the connection end between fixed block 1 and movable block 2. One end of movable block 2 is rotatably equipped with hook 10, and the other end is equipped with hanging ring 9; during connection, hanging ring 9 corresponds to hook 10. It should be noted that the setting of hanging rings and hooks can be set as needed, as long as the corresponding surfaces of fixed and movable blocks, and the corresponding surfaces of movable blocks among themselves are connected by hooks and hanging rings. The specific block with a hook and the block with a hanging ring can be set conventionally. The setting of hooks and hanging rings allows for a certain degree of deformation between fixed and movable blocks, and between movable blocks among themselves, effectively resisting the thrust from the slope and preventing block breakage. Moreover, during maintenance, since the connections at both ends of the block are detachable, the damaged block can be simply removed and replaced.

[0039] Furthermore, notches 11 are provided at the contact positions of the hook 9 and hook 10 after they are engaged, which increases the friction between the hook and hook and prevents the hook from easily slipping off the hook. The hook 9 is threadedly connected to both the movable block 2 and the fixed block 1. It should be noted that the connecting post of the hook is threaded and is threadedly connected to the block. When the hook is engaged with the hook, rotating the hook can move the block connected to the hook toward the block connected to the hook, thereby adjusting the distance between the two blocks to accommodate the connection operation of the snap-fit ​​parts and the connecting sleeve.

[0040] Furthermore, to increase the stability between the hanging ring, hook, and block, a connecting cylinder is embedded within the block. The connecting cylinder has threads, allowing the connecting post on the hanging ring to connect threadedly with the connecting cylinder. This avoids the connecting post being directly embedded in the block, which could cause wear on the concrete during use and lead to unstable hanging ring connections. Similarly, the hook is designed in the same way. A sleeve adapted to the hanging ring rod is embedded within the block where the hook is located. To ensure the rotation of the hanging ring, a bearing 31 is fixedly fitted onto the hanging ring rod, with its outer ring fixed within the sleeve, allowing the hanging ring to rotate. As a further preferred embodiment, a limiting block 32 is fixed to the end of the hanging ring rod. Simultaneously, an annular groove is provided within the sleeve to accommodate the limiting block 32, minimizing the risk of the hanging ring detaching from the block or sleeve.

[0041] Furthermore, movable block 2 and fixed block 1, as well as movable block 2 and movable block 2, are respectively positioned by snap-fit ​​connectors. One end of movable block 2 and the other end of fixed block 1, which is fixed to one of the cast-in-place piles, are provided with a groove 12, within which a positioning rod 13 is vertically installed. The other end of movable block 2 and the other end of fixed block 1, which is fixed to another cast-in-place pile, are provided with snap-fit ​​connectors. The groove 12 and the snap-fit ​​connectors are correspondingly positioned, and the snap-fit ​​connectors are interference-fitted with the positioning rod 13. It should be noted that, similar to the hook configuration, a cylindrical body can be embedded within the groove to increase the stability of the positioning rod and the stability of the connection between the positioning rod and the snap-fit ​​connector. The main purpose of the snap-fit ​​connector is to address the issue that after the hook and ring are connected, the slope's inclination and unevenness can easily cause the connected movable block to slide downwards. This necessitates ensuring that the movable block and its adjacent block are aligned, or that the steel cable is aligned with the connector or another block, each time the cable and connector are connected via the connecting sleeve. This makes the operation difficult for workers. Therefore, the snap-fit ​​connector ensures that after the hook and ring are connected, adjacent blocks remain horizontal to a certain extent, allowing the connecting sleeve to secure adjacent steel cables or cables to connectors.

[0042] Specifically, the snap-fit ​​component includes a fixing cylinder 14 embedded at the other end of the movable block 2 and at the other end of the fixed block 1 connected to another cast-in-place pile. One end of the fixing cylinder 14 extends out of the block, and a fixing rod 15 is inserted into the fixing cylinder 14 and connected by a spring 16. That is, inside the fixing cylinder, the end of the fixing rod is connected to the inner bottom of the fixing cylinder by the spring 16, and the other end of the fixing rod 15 extends out of the fixing cylinder 14 and is press-fitted with the positioning rod 13 by a positioning head 17. The arrangement of the fixing cylinder and the fixing rod can adapt to different spacings between blocks to accommodate hooks, hanging rings, and connections between connectors and steel cables, and between steel cables. Both of these connection methods can adapt to different spacings between blocks and can better adapt to the slope environment. As one embodiment, a gasket 33 can be set at the end of the fixing rod that extends into the fixing cylinder. The gasket 33 is press-fitted with the fixing cylinder 14 to prevent water from entering the fixing cylinder, and one end of the spring is fixed to the pad surface of the gasket.

[0043] Furthermore, the positioning head 17 is U-shaped, with its open end facing the positioning rod 13. The bottom end of the positioning head is connected to the fixing rod 15. The positioning head 17 is provided with a groove 21 that is interference-fitted with the positioning rod 13. The groove is also U-shaped, with its open end facing the positioning rod 13. When the positioning head 17 is inserted into the groove 12, the positioning rod is directly engaged in the groove, which reduces the possibility of the positioning head disengaging from the groove to a certain extent.

[0044] Furthermore, to increase the stability of the connection between the positioning rod 13 and the positioning head 17, symmetrically arranged transversely arranged strip holes 18 are provided on both sides of the positioning head 17. A rotating shaft is vertically arranged inside the strip hole 18, and a baffle 19 is rotatably arranged on the rotating shaft. The two baffles 19 abut against each other at one end inside the positioning head 17. An elastic element 20 is provided inside the strip hole 18, and one end of the elastic element 20 is connected to the side wall near the other end of the baffle 19. The elastic element is arranged transversely and includes, but is not limited to, a spring. When the positioning head extends into the groove, the positioning rod pushes the two baffles apart, allowing the positioning rod to enter the area enclosed by the positioning head and the baffles until the positioning rod is stuck in the slot. At this time, the baffles are reset under the action of the elastic element. It should be noted that there are two ways to set the baffles. One is that after the positioning rod enters the slot, the positioning rod can no longer exit from the positioning head. It can only exit by breaking the baffle. In this case, the baffle restricts the positioning rod from detaching. This invention adopts this method. Another method involves adjusting the size of the slotted hole to allow the baffle to rotate freely. In this case, under external force, the positioning rod can freely enter and exit the positioning head. This method uses the force of an elastic element to restrict the positioning rod, resulting in a weaker force on the positioning rod. However, with the first method, when replacing the block, external force can damage the baffle inside the positioning head, causing the positioning head to disengage from the groove. Since the movable block has a locking mechanism, whether the locking mechanism on the block to be replaced is damaged or not does not affect the process.

[0045] Furthermore, after the blocks are installed, in order to enhance the stability of the snap-fit ​​parts and the blocks with grooves, a fixing hole 22 can be vertically provided through the fixing rod 15. The fixing hole can be a smooth hole or a threaded hole. The movable block 2 and the fixed block 1 are provided with positioning holes (not shown in the figure) that communicate with the groove 12. A screw (not shown in the figure) is provided in the positioning hole. The screw passes through the positioning hole in sequence, extends into the groove 12, and passes through the fixing hole 22 to be inserted into the bottom of the groove 12. This can, to a certain extent, prevent the snap-fit ​​parts and the positioning rod from separating under the action of external force when the blocks are pushed by the slope.

[0046] This invention also discloses a construction method for a composite retaining wall structure, comprising the following steps:

[0047] (1) Open channels along the slope on both sides of the slope. The channels are larger than the diameter of the cast-in-place piles. Since it is difficult to accurately estimate the number of blocks between the two cast-in-place piles, the cast-in-place piles on one side are usually cast first.

[0048] (2) First, fix one row of fixed blocks 1, specifically: place a casting mold 23 in one of the channels. The bottom of the casting mold is closed and the top is open. A reinforcing cage 24 is placed inside the casting mold 23. The outer diameter of the reinforcing cage is smaller than the inner diameter of the casting mold. Multiple positioning blocks 27 that abut against the inner wall of the casting mold 23 are set on the outer wall of the reinforcing cage 24, so that the poured concrete fills the cavity between the reinforcing cage and the casting mold, thereby making the reinforcing cage completely placed in the concrete. Insertion holes 25 for inserting connecting bars 4 are set on the side wall of the casting mold 23. The connecting bars 4 on the fixed blocks 1 extend into the reinforcing cage 24, and a limiting rod 26 is inserted into the end of the connecting bar 4. Finally, concrete is poured into the casting mold 23. It should be noted that: the end of the connecting bar is as follows: Figure 8 As shown, it is ring-shaped and allows the insertion of a limiting rod to fix the connecting bar. The limiting rod is made of steel reinforcement.

[0049] Furthermore, in order to increase the friction between the casting mold and the channel, an annular plate 34 is fixed on the contact surface between the casting mold and the channel, and several pointed cone rods 35 are staggered on the annular plate 34 to facilitate insertion into the soil, thereby increasing the firmness of the cast-in-place pile in the channel.

[0050] (3) After a cast-in-place pile is cast, it is connected to the other end of the fixed block 1 by the hook 10 of the movable block 2 through the hanging ring 9, and the distance between the two is adjusted by rotating the hanging ring 9. During the connection process, the fixing rod 15 is inserted into the groove 12. In this way, other movable blocks 2 are connected in sequence until the fixed block 1 is finally connected. Then, another row of fixed blocks 1 is fixed according to steps (1) and (2). After the connection is completed, another cast-in-place pile is cast.

[0051] (4) Fix the fixed block 1 and the movable block 2 with the connecting sleeve 6. This step can be performed during the process of connecting the movable block, that is, after connecting the hook and the hanging ring, and after connecting the snap fastener.

[0052] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0053] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A composite retaining wall structure, characterized in that: It includes cast-in-place piles that are set on both sides of the slope edge. One side of each cast-in-place pile is connected to a number of fixed blocks (1). Multiple movable blocks (2) are detachably connected between the cast-in-place piles and between the two fixed blocks (1) set on the same side. In the vertical direction, the fixed blocks (1) and the movable blocks (2) are fixed by I-beams (3). The movable block (2) and the fixed block (1), and the movable block (2) and the movable block (2) are respectively positioned by snap-fit ​​components. One end of the movable block (2) and the other end of the fixed block (1) fixed to one of the cast-in-place piles are provided with a groove (12). A positioning rod (13) is vertically arranged in the groove (12). The other end of the movable block (2) and the other end of the fixed block (1) fixed to another cast-in-place pile are provided with the snap-fit ​​component. The groove (12) and the snap-fit ​​component are correspondingly arranged. The snap-fit ​​component is interference-fitted with the positioning rod (13). The snap-fit ​​component includes a fixing cylinder (14) embedded in the other end of the movable block (2) and the other end of the fixed block (1) connected to another cast-in-place pile. A fixing rod (15) is inserted into the fixing cylinder (14) and connected by a spring (16). The other end of the fixing rod (15) extends out of the fixing cylinder (14) and is interference-fitted with the positioning rod (13) by a positioning head (17). The positioning head (17) is U-shaped, with its open end facing the positioning rod (13); the positioning head (17) has symmetrically arranged strip holes (18) on both sides, and a rotating shaft is vertically arranged in the strip hole (18). A baffle (19) is rotatably arranged on the rotating shaft. The two baffles (19) are located at one end in the positioning head (17) and abut against each other. An elastic element (20) is arranged in the strip hole (18), and one end of the elastic element (20) is connected to the side wall near the other end of the baffle (19); the positioning head (17) has an interference fit groove (21) for the positioning rod (13).

2. The composite retaining wall structure according to claim 1, characterized in that: One end of the fixed block (1) is provided with at least one connecting bar (4), and the other end is provided with at least one connector (5). The connecting bar (4) is fixed to the cast-in-place pile, and the connector (5) is connected to the movable block (2) through the connecting sleeve (6).

3. The composite retaining wall structure according to claim 2, characterized in that: The movable block (2) has through holes (7) at both ends along its length. A steel cable (8) is installed in the through hole (7). Both ends of the steel cable (8) extend out of the through hole (7). The two ends of the steel cable (8) are provided with threads that are compatible with the connecting sleeve (6). The movable block (2) and the fixed block (1) are connected by the connecting sleeve (6). The movable block (2) and the movable block (2) are connected by the connecting sleeve (6).

4. The composite retaining wall structure according to claim 1, characterized in that: A hanging ring (9) or hook (10) is provided at the center of the connection end between the fixed block (1) and the movable block (2). One end of the movable block (2) is rotatably provided with a hook (10) and the other end is provided with a hanging ring (9). When connected, the hanging ring (9) corresponds to the hook (10).

5. A composite retaining wall structure according to claim 4, characterized in that: The contact positions of the hanging ring (9) and hook (10) after being fastened are respectively provided with notches (11), and the hanging ring (9) is connected to the movable block (2) and the fixed block (1) by threads.

6. A composite retaining wall structure according to claim 1, characterized in that: A fixing hole (22) is provided through the fixing rod (15). The movable block (2) and the fixed block (1) are provided with positioning holes that communicate with the groove (12). A screw is provided in the positioning hole. The screw extends into the groove (12), passes through the fixing hole (22), and extends into the bottom of the groove (12).

7. A construction method for a composite retaining wall structure according to any one of claims 1 to 6, characterized in that: Includes the following steps: (1) Open channels along the slope on both sides of the slope, with the channels being larger than the diameter of the cast-in-place piles; (2) First, fix one row of fixed blocks (1), place a casting mold (23) in one of the channels, place a reinforcing cage (24) in the casting mold (23), and set an insertion hole (25) on the side wall of the casting mold (23) for inserting the connecting bar (4). The connecting bar (4) on the fixed block (1) extends into the reinforcing cage (24), and a limiting rod (26) is inserted into the end of the connecting bar (4). Pour concrete into the casting mold (23); set multiple positioning blocks (27) on the outer wall of the reinforcing cage (24) that abut against the inner wall of the casting mold (23). (3) Connect the fixed block (1) to the hook (10) of the movable block (2) through the hanging ring (9) and adjust the distance between them by rotating the hanging ring (9). During the connection process, insert the fixing rod (15) into the groove (12). Connect other movable blocks (2) in this way until the last fixed block (1) is connected. Then fix another row of fixed blocks (1) according to steps (1) and (2). (4) Fix the fixed block (1) and the movable block (2) by means of the connecting sleeve (6).

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