Assembled retaining wall and construction method thereof

Abstract

The invention provides a split mounting type retaining wall and a construction method thereof. The split mounting type retaining wall is used for a retaining wall which is 5-7.5 m away from the ground. Comprising a strip-shaped foundation which is arranged on construction foundation soil to form a foundation layer; the retaining wall comprises a plurality of unit blocks, the unit blocks are spliced to form the retaining wall with the preset height, the retaining wall comprises a plurality of layers of wall bodies, and the layers of wall bodies are arranged in an embedded mode; the retaining wall comprises a first retaining wall body and a second retaining wall body, and the first retaining wall body and the second retaining wall body are connected through a corner unit. Each unit block is a precast block, a net-shaped structure assembled by deformed steel bars is arranged in each precast block, and the area of each net-shaped structure covers more than 80% of the area of the cross section of each unit block; tie bar anchoring assemblies are embedded in the precast blocks, and openings of the tie bar anchoring assemblies are located in the outer surfaces of the precast blocks. Due to the universality of the unit blocks, batch production can be achieved, materials are saved, stacking of on-site materials is reduced, and the construction site is cleaner and tidier.

Description

Technical Field

[0001] The invention relates to the technical field of retaining wall structure and construction, and in particular to an assembled retaining wall and a construction method thereof. Background Art

[0002] In municipal viaduct projects, there will be a ramp structure filled with earth and stone at the intersection of the bridge superstructure and the ground road surface. Generally, there will be retaining wall structures on both sides of the ramp. The traditional method of retaining wall is generally to use cast-in-place method for construction. Cast-in-place retaining wall requires a series of operations such as steel bars, formwork, concrete, etc. In addition, scaffolding is required, and the construction period is longer. Therefore, it is considered to use a prefabricated assembled retaining wall structure instead of the cast-in-place retaining wall structure. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an assembled retaining wall and a construction method thereof, and to improve the overall efficiency by utilizing unit blocks.

[0004] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows: On the one hand, an assembled retaining wall is used for a retaining wall with a distance of 5-7.5m from the ground; it includes a strip foundation, the strip foundation is placed on the construction base soil to form a foundation layer; Unit blocks, the unit blocks are several blocks, several unit blocks are spliced ​​to form a retaining wall of a preset height, the retaining wall includes several layers of walls, and each layer of walls is inlaid; The retaining wall comprises a first retaining wall and a second retaining wall, wherein the first retaining wall and the second retaining wall are connected via a corner unit; The unit block is a prefabricated block, and a mesh structure assembled with threaded steel bars is arranged inside the prefabricated block, and the area of ​​the mesh structure covers more than 80% of the cross-sectional area of ​​the unit block; A tie rod anchoring assembly is pre-embedded in the prefabricated block, and an opening of the tie rod anchoring assembly is located on the outer surface of the prefabricated block.

[0005] Furthermore, the tie rod anchoring assembly comprises an anchor box, a box cover is provided at the anchor box, and a slot for plugging into the anchor box is provided at the prefabricated block near the anchor box.

[0006] Furthermore, it also includes a U-shaped hook connected to the threaded steel bar, wherein the U-shaped hook is partially embedded in the unit block and forms a horizontal hanging point outside the unit block.

[0007] Furthermore, the standard block is a regular polygon, and a concave-convex structure is provided on the outer periphery of the regular polygon.

[0008] On the other hand, the construction method of the assembled retaining wall includes the following steps: S1) Lay the strip foundation along the length of the construction area and stabilize it; S2) on the strip foundation, laying the unit blocks of the bottom retaining wall and the corner unit blocks by hoisting and horizontally moving to form a first foundation layer and a second foundation layer; S3) backfilling graded crushed stone on the first foundation layer so that the height of the graded crushed stone is at least as high as the pre-buried anchor box, installing the reinforcing bar anchor assembly for anchoring after road rolling and performing a compaction test to determine whether the backfill meets the standard; S4) when the unit blocks of the second layer of retaining wall are laid to the same height as the embedded anchor boxes of the second layer of retaining wall, repeat step S3) until the laying of the first retaining wall is completed; Repeating step S3) to step S4) to complete the construction of the second retaining wall, or simultaneously constructing the first retaining wall or the second retaining wall; and repeatedly completing the first retaining wall and the second retaining wall; S5) Slab laying and casting of bridge abutments.

[0009] Furthermore, before laying the strip foundation, the step also includes base treatment, specifically, excavating and backfilling the bottom graded gravel layer, and vibrating and compacting it so that its compaction degree reaches the set requirements.

[0010] Furthermore, the laying of strip foundations also includes, when the foundation elevation changes, stacking a number of strip foundations in a stepped manner along the length direction of the construction area, with the height difference between adjacent successions being half the height of the unit block, and placing slopes between adjacent steps.

[0011] Furthermore, it also includes the laying of half-width unit blocks, specifically, laying half-width unit blocks at intervals on the strip foundation and the retaining wall of the last layer.

[0012] Furthermore, it also includes position adjustment between adjacent unit blocks and between half-width unit blocks and unit blocks, specifically, the position adjustment is performed by plugging with wooden wedges and temporarily fixing with a reinforcement device.

[0013] Furthermore, the installation of the tie rod anchor assembly for anchoring specifically involves opening the cover of the anchor box, connecting the steel bars into the slot of the anchor box, the connecting steel bars drive the anchor box to move into the slot, and anchoring is achieved by filling soil.

[0014] The present invention has the following beneficial effects: Compared with traditional cast-in-place retaining walls, the construction process of prefabricated retaining walls is easier. The assembly construction only requires a 2-ton forklift for installation, and no high-altitude work is required, which is safer. Due to the versatility of the unit blocks, they can be mass-produced during prefabrication, which saves more materials and reduces the stacking of materials on site, making the construction site tidier. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a retaining wall in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of the basic strip provided by the present invention; Figure 3 A schematic diagram of the structure of a unit block provided by the present invention; Figure 4 A cross-sectional view of a unit block provided by the present invention; Figure 5 A schematic diagram of the structure of the reinforcement anchoring assembly provided by the present invention; Figure 6 An assembly diagram of a half-width unit block provided by the present invention; Figure 7 A schematic diagram of the structure of a half-width unit block provided by the present invention; Figure 8 A schematic diagram of the structure of a corner unit block provided by the present invention; Fig. 9 A schematic diagram of the structure of a corner prism block provided by the present invention; In the figure: 1. Strip foundation; 2. Unit block; 21. Threaded steel bar; 3. Retaining wall; 31. First retaining wall; 32. Second retaining wall; 4. Wall; 5. Corner unit; 51. Corner unit block; 52. Corner prism block; 6. Tie bar anchor assembly; 61. Anchor box; 62. Tie bar; 63. Block; 64. Slot; 7. Half-width unit block; DETAILED DESCRIPTION

[0016] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0017] See attached Figure 1-9 As shown, the specific scheme in this embodiment is as follows: First, an introduction will be given in conjunction with the retaining wall in this embodiment.

[0018] The entire cast-in-place retaining wall structure is divided into unit blocks 2 of various forms and assembled and installed on site, which simplifies the on-site construction process and reduces the impact of the construction on the surrounding environment.

[0019] In this embodiment, the assembled retaining wall is used for a retaining wall with a distance of 5-7.5m from the ground; it includes a strip foundation 1, the strip foundation 1 is placed on the construction base soil to form a foundation layer; The unit block 2 is composed of a plurality of unit blocks 2, and the plurality of unit blocks 2 are spliced ​​to form a retaining wall 3 of a preset height. The retaining wall 3 includes a plurality of wall layers 4, and each wall layer 4 is inlaid. In the present embodiment, the wall 4 between the upper and lower layers is staggered by a concave-convex structure. For example, when a regular hexagon is used to form the unit block, the unit block of the upper layer is inlaid between two unit blocks of the lower layer to complete the staggered splicing. In the present embodiment, a plurality of unit blocks 2 are staggered to form a honeycomb shape, especially at the walls of adjacent layers, the splicing positions at corresponding positions of different layers are staggered, for example, the upper unit block corresponds to the lower layer, which is staggered, so that the upper unit block is partially connected to the staggered position of the lower layer.

[0020] The retaining wall 3 includes a first retaining wall 31 and a second retaining wall 32, and the first retaining wall 31 and the second retaining wall 32 are connected by a corner unit 5; The unit block 2 is a prefabricated block, and a mesh structure assembled with threaded steel bars 21 is arranged inside the prefabricated block, and the area of ​​the mesh structure covers more than 80% of the cross-sectional area of ​​the unit block 2; in this embodiment, the mesh structure is actually a structure spliced ​​with steel bars, and the thickness of the protective layer formed by the steel bars is not less than 20 mm, so that the strength of the unit block composed of the regular polygon of the cavity can be guaranteed after casting.

[0021] A tie rod anchoring assembly 6 is embedded in the prefabricated block, and an opening of the tie rod anchoring assembly 6 is located on the outer surface of the prefabricated block.

[0022] The detailed introduction of prefabricated blocks is as follows: 1. Prefabricated strip foundation1.

[0023] The strip foundation 1 in this embodiment constitutes the foundation structure, which is specifically plain concrete with a size of 0.35m×0.15m×2m. It is placed on the bottom soil compaction layer and the bottom of the standard retaining wall block, which plays the role of leveling and diffusing the upper load. Each block is 3m long and can be arranged in a stepped manner according to the different bottom elevations of the retaining wall, which can meet the requirements of uneven settlement of the retaining wall. In this embodiment, in the stepped structure, the height difference between adjacent steps is half the height of the unit block, which is convenient for splicing between the bottom unit blocks, and this half-height difference setting enables the adjacent layers between multi-layer walls to be well embedded when splicing. At the same time, in the horizontal direction, a concrete slope is set between adjacent steps so that the block is just placed in the height difference; in this embodiment, the unit block can be selected from regular hexagons, etc.

[0024] In this embodiment, the half height difference between adjacent steps can also reduce the filling of other special-shaped structures. The standard structure is selected, the operation is simpler, and it is convenient for subsequent mass production.

[0025] 2. Unit block 2.

[0026] In this embodiment, the prefabricated block constitutes the entire unit block 2, and its concrete strength grade is not less than C30; the steel bar is selected from threaded steel with a diameter of not less than 10mm; and then the unit block 2 is also provided with a tie bar anchoring block (i.e., a tie bar anchoring assembly), a U-shaped hook, a hoisting hole, and a positioning groove; In this embodiment, the unit block 2 can be a polygon, such as a pentagon or a hexagon. The unit block 2 in this embodiment is a hexagon with a height of 1530mm, a width of 2000mm, and a thickness of 140mm, 180mm and 220mm (140mm thickness is applicable to a height not exceeding 7.6m). Unit blocks of different thicknesses are selected according to different height positions. To facilitate the installation, positioning and connection of the prefabricated blocks, the six sides of the hexagon are provided with concave and convex patterns, and the concave and convex patterns of the two opposite sides complement each other; in this embodiment, in order to make a better connection, the hexagon is provided with a staggered concave and convex arrangement, for example, if one side is a groove, then its adjacent side constitutes a convexity, which is convenient for the concave and convex clamping connection. The clamping here is staggered splicing, which ensures the flatness and integrity of the final surface.

[0027] The steel skeleton in the standard unit block is composed of 9 10mm threaded steel bars forming a mesh structure; See attached Figure 5 As shown, the tie rod anchoring assembly 6 in this embodiment includes an anchor box 61 and a tie rod 62 matched with the anchor box. In this embodiment, the tie rod anchoring block is pre-embedded and consists of a plastic box and a steel plate clamp ring; In this embodiment, the anchor box 61 forms an opening on the outside, and a box cover is provided at the opening. During construction, the box cover is covered. When the reinforcement anchoring is required, the box cover is opened and the reinforcement 62 is inserted into the opening. In this embodiment, the anchor box 61 includes an upper box body, the upper box body matches the reinforcement 62, and an assembly box vertically matched with the upper box body, the assembly box is provided with a groove body, and then a U-shaped slot is pre-embedded in the unit block. During use, the reinforcement 62 is first inserted into the unit block through the horizontal direction of the opening, and then the reinforcement 62 is pulled to move along the width direction of the unit block. When it moves to the moving position, the groove body matches the U-shaped slot. At this time, the reinforcement is pulled to be adjusted into the slot in the vertical direction to complete the assembly.

[0028] In this embodiment, a limiting mechanism is provided on the side of the lower box body of the anchor box 61, so that after the groove body enters the U-shaped slot, due to the setting of the limiting mechanism, it will not move too much, etc., thereby achieving the functions of anti-deviation, pressure resistance and stability.

[0029] During the specific anchoring effect, the reinforcement 62 is placed on the side of the retaining wall, and then during the process of filling concrete, the reinforcement on the side close to the anchor box forms an active anchoring force, while the reinforcement on the side away from the anchor box forms a passive anchoring force. The mutual resistance between these forces realizes anchoring.

[0030] In this embodiment, the first end of the tie rod 62 is fixed in the block 63 located on the outside, and then the second end is connected to the insertion part 64, which is inserted into the entire anchor box 61 and drives the anchor box 61 to move so that it is assembled with the U-shaped slot 64. Then, through subsequent filling or adding a gravel layer, one of the two ends of the tie rod actively generates an anchoring force, and the other passively generates an anchoring force to complete the anchoring.

[0031] 3. Half-width unit block See attached Figure 7 As shown, the half-width unit block 7 in this embodiment is trapezoidal, arranged at the bottom of the retaining wall, initially positioned, and controls the position of the upper and lower and left and right prefabricated blocks. It is 740mm high and also includes three thicknesses of 140mm, 180mm and 220mm. In this embodiment, an anchor box 6 and the like can also be provided in the half-width unit block.

[0032] 4. Corner unit block The corner unit 5 in this embodiment includes a corner unit block 51 and a corner prism block 52 .

[0033] The corner unit block 51 is a pentagonal unit block with one side corner cut off. It is arranged at the corner, with one side vertical and close to the corner prism block. It is 1530mm high and 1500mm wide, and also includes three thicknesses of 140mm, 180mm and 220mm. The corner unit block 51 in this embodiment is arranged close to the retaining wall, and the corner unit blocks 51 are arranged on both sides of the corner prism block 52.

[0034] As for the corner prism block 52, concave-convex grooves and an anchor box are added on the upper and lower sides thereof, and the corner unit block 51 on the side is assembled through the grooves or convex blocks.

[0035] The corner prism block 52 is 1530 mm high, has an axisymmetric cross section, is 345 mm wide, has grooves on both sides, and can be embedded on both sides of the corner unit block 51. There are concave and convex tooth blocks on the upper and lower sides to vertically position the corner prism.

[0036] In actual construction, construction can be arranged according to the positive and negative corners.

[0037] 6. Top non-standard block In this embodiment, non-standard blocks are needed to fill some gaps. For example, the role of the non-standard blocks on the top is to fill the gaps with blocks of different sizes so that the upper edge of the retaining wall can be controlled to be a straight line, which is convenient for the construction of subsequent structures.

[0038] The non-standard blocks on the top are made according to the dimensions shown in the construction drawings, and a small part can be made on site after measuring.

[0039] 7. Anchoring mechanism.

[0040] In this embodiment, an anchoring mechanism is also included, and the anchoring mechanism includes an anchoring concrete block; an anchoring connecting steel bar and a clamping ring; The anchoring tie steel bars are made of galvanized high-strength steel bars, both ends of which are upset. The diameter and length of the steel bars are selected according to the design requirements. At this time, the anchoring tie steel bars are arranged in the hollow unit block 2.

[0041] Anchored concrete prefabricated blocks can be used as pads for stacking standard blocks. Rectangular, with a reserved hole in the middle, the hole diameter is slightly larger than the upsetting head of the tie steel bar, the block thickness is 100mm, the height is 200mm, and the length is 200mm, 400mm, and 600mm in three different sizes for anchoring at different buried depths.

[0042] The clamping ring is made of galvanized steel plate with a size of 70*70*10, and a clamping gap is left on one side. After the tie steel bar is passed through the reserved hole of the anchor block, the clamping ring is used to cling to the outside of the anchor concrete block and clamp the upset head of the steel bar at the same time.

[0043] 8. Auxiliary devices 1) Vertical lifting device It is convenient for the vertical installation and positioning of the retaining wall block; conventionally, it is penetrated by drilling, but in this embodiment, the lifting is completed by partial insertion.

[0044] 2) Crowbar Adjust the position of the retaining wall 3) wooden wedge; Adjust the gap between retaining wall blocks; 4) Clamping device; Adjust the flatness of the vertical surface of the retaining wall block.

[0045] 3. Construction process: 1. Substrate treatment The first step is to conduct foundation bearing capacity tests in the areas where retaining walls are needed, and determine foundation treatment requirements based on the test results.

[0046] Excavation is carried out according to the requirements of edge and depth, and the original soil must not be disturbed. The original soil surface after excavation is leveled and compacted. A layer of geogrid is laid between the interface of the original soil and the backfill material to enhance the bearing capacity of the foundation.

[0047] Backfill the bottom graded gravel layer, compact it by vibration, and test the compaction degree of the material. Once the requirements are met, you can start installing the retaining wall.

[0048] 2. Install strip foundation The strip foundation 1 is arranged directly below the retaining wall 3. As a compression member at the bottom of the retaining wall, it plays a role in leveling and bearing force. During installation, a layer of fine sand is laid on the compacted base soil, and then the strip foundation is laid flat on the fine sand in accordance with the wall line shape and stabilized. When the bottom foundation elevation is inconsistent, the strip foundation should be arranged in a stepped manner, with a height difference of 760mm per level (the height of the half-width unit block at the bottom of the retaining wall), and a slope is placed between adjacent steps.

[0049] 3. Install the bottom unit block 1) Installation of the bottom half unit block: Draw lines on the foundation to mark the positions of the retaining wall blocks, first install the half-width unit blocks 7 with the facing facing outwards, and arrange them in sequence according to the principle of one every other (one standard block every other).

[0050] 2) Installation of the bottom standard unit block Install the standard unit block 2 between the two half-width blocks that are already in place, use small wooden wedges to insert between adjacent blocks to adjust the position of the standard block, and use a clamping device to temporarily clamp two adjacent wall panels.

[0051] 3) Bottom corners and other unit blocks The bottom corner and other unit blocks are placed in sequence according to the position of the elastic line and temporarily fixed. Specifically, the corner unit block 51 is generally connected and assembled with the unit block 2, and then the corner unit blocks 51 at the first retaining wall 31 and the second retaining wall 32 on both sides are respectively spliced ​​with the two sides of the corner prism block 52 to complete the assembly of the overall structure.

[0052] 4. Paving graded stone After the bottom unit block is installed, lay the first layer of graded gravel to the bottom of the embedded anchor plastic box (height about 375mm). When paving, pay attention to the outside being higher and the inside being lower (2% slope). Use a roller for vibration compaction. During the process, pay attention to using small compacting machinery within 1.5m from the retaining wall instead of large rollers.

[0053] 5. Install the reinforcement and anchor blocks The embedded anchor box 61 is opened, one end of the connecting steel bar (i.e., the tie bar 62) is inserted into the box, and then the wall panel end is clamped by pulling it outward after horizontal movement. The other end of the connecting steel bar is passed through the hole of the anchor block, and the steel plate is used to clamp the upset head of the steel bar to fix the anchor end of the steel bar.

[0054] In actual construction, in the subsequent filling of concrete and gravel, the reinforcement will also be acted on to complete the anchoring. In this embodiment, a plurality of reinforcements can be arranged on each unit block to perform anchoring at a plurality of locations.

[0055] In this embodiment, when arranging the anchor boxes in the unit blocks formed in the standard blocks, the force and the like are fully taken into consideration. For example, in the entire retaining wall, in the unit blocks within 7.6 m in height, the horizontal and vertical spacings between the card blocks 63 and the prefabricated anchor boxes 61 are 0.75 m. When the wall is higher, the spacing between the card blocks 63 and the anchor boxes 61 will be smaller. At this time, there can be multiple tie bars 62, and the area of ​​the anchoring surface formed by the tie bars in each unit block reaches 0.75 m*0.5 m. At this time, more card blocks 63 and anchor boxes 61 can be set; and as the retaining wall increases further, for example, when the height is greater than 7.6 m, the area of ​​the anchoring surface formed by multiple tie bars in the unit blocks is 0.5 m*0.5 m. At this time, the higher the wall is, the more pulling points are required, and the number of anchor boxes that can be installed in the standard blocks will also increase, for example, it can be set to 4 to 10, so that there will be more steel bars in the corresponding standard blocks (i.e., unit blocks).

[0056] 6. Retaining wall construction layer by layer (filled with graded gravel) The upper layer of various unit blocks and backfill graded crushed stones are alternately assembled. The verticality of the wall and the position between the blocks should be checked multiple times during assembly to keep them consistent. Rubber cushions are used between the upper and lower blocks to ensure uniform force and buffer the blocks. After each layer of backfill is compacted, a compaction test is carried out in a timely manner.

[0057] 7. Casting of abutment slab When the height of the retaining wall is installed to the design height of the abutment slab, the slab can be cast. The slab is used to connect the bridge superstructure and the ground subgrade structure. One end is placed on the abutment and connected to the dowel rod, and the other end is placed inside the retaining wall. After compacting the backfill material, the concrete cushion is cast and the slab is placed.

[0058] 8. L-shaped wall casting The L-shaped wall is arranged on the inner side of the top of the retaining wall, and is the closing of the retaining wall. It can protect the retaining wall and can also connect the upper guardrail. At the same time, the upper end of the retaining wall forms a stable whole, which is convenient for arranging the drainage system. In this embodiment, a foam layer is arranged between the L-shaped wall casting and the prefabricated board structure, and the foam layer isolates the two. The foam layer can achieve a buffering effect, and the drainage pipe is arranged at the cast-in-place wall.

[0059] In this embodiment, pouring is specifically added before the standard blocks at the top are assembled, so that the cast-in-place wall close to the top is located between the prefabricated blocks to complete the setting of the drainage pipe and the like.

[0060] 9. Connection between retaining wall and ground road As the height of the retaining wall decreases, the road surface gets closer to the ground. When the height drops to less than 1.5 meters, it is more convenient for cast-in-place construction. It is not appropriate to continue using prefabricated blocks, and consideration should be given to using a variable-section cast-in-place retaining wall to connect to the ground.

[0061] 10. Guardrail installation.

[0062] The implementation scheme of the present invention is applied to a local confidentiality project, as follows: This project is located in Malaysia. In a section of the viaduct, a total of 7 ramps are set up. At each junction with the ground, a prefabricated and assembled retaining wall structure is designed. The heights of the retaining walls vary, with the maximum height reaching 13 meters.

[0063] Take the C ramp retaining wall of the project as an example. Here, at the location of CAB2, the bridge deck is 7.5 meters above the ground, and the lowest point is less than 5 meters from the ground. Considering the cost and construction period, the pier structure is no longer suitable. The retaining wall structure is selected to connect with the ground. Compared with the reinforced concrete retaining wall structure, it not only reduces the cost to a certain extent, but also improves the quality, and the appearance quality is more in line with the requirements of beautifying the city.

[0064] In this embodiment, the entire cast-in-place retaining wall structure is divided into various standard unit blocks, which are assembled and installed on site, simplifying the on-site construction process and reducing the impact of the construction process on the surrounding environment. During the construction process, the impact on the existing roads is small, the construction work surface is controllable, the construction safety is controllable, and the construction quality is controllable. Compared with traditional cast-in-place retaining walls, the construction process of prefabricated retaining walls is easier. The assembly construction only requires a 2-ton forklift for installation, and no high-altitude work is required, which is safer. Due to the versatility of the unit blocks, they can be mass-produced during prefabrication, which saves more materials and reduces the stacking of materials on site, making the construction site tidier.

[0065] The invention was applied to the viaduct project. According to calculations, if cast-in-place retaining walls were used, the construction measures cost would be 300,000 Malaysian ringgits, the equipment rental fee would be 180,000 Malaysian ringgits, the labor cost would be 500,000 Malaysian ringgits, and the construction period would be 360 ​​days. After the replacement, the construction measures cost would be 100,000 Malaysian ringgits, the equipment rental fee would be 80,000 Malaysian ringgits, the labor cost would be 120,000 Malaysian ringgits, and the construction period would be 180 days. This saved 680,000 Malaysian ringgits and 180 days of construction time.

[0066] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0067] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Assembled retaining wall, used for retaining wall with a distance of 5-7.5m from the ground; characterized in that: It includes a strip foundation, which is placed on the construction base soil to form a foundation layer; Unit blocks, the unit blocks are several blocks, several unit blocks are spliced ​​to form a retaining wall of a preset height, the retaining wall includes several layers of walls, and each layer of walls is inlaid; The retaining wall comprises a first retaining wall and a second retaining wall, wherein the first retaining wall and the second retaining wall are connected via a corner unit; The unit block is a prefabricated block, and a mesh structure assembled with threaded steel bars is arranged inside the prefabricated block, and the area of ​​the mesh structure covers more than 80% of the cross-sectional area of ​​the unit block; A tie rod anchoring assembly is pre-embedded in the prefabricated block, and an opening of the tie rod anchoring assembly is located on the outer surface of the prefabricated block.

2. The assembled retaining wall according to claim 1, characterized in that: The reinforcing bar anchoring assembly comprises an anchoring box, a box cover is arranged at the anchoring box, and a slot for plugging with the anchoring box is arranged near the anchoring box on the prefabricated block.

3. The assembled retaining wall according to claim 1, characterized in that: It also includes a U-shaped hook connected to the threaded steel bar, wherein the U-shaped hook is partially embedded in the unit block and forms a horizontal hanging point outside the unit block.

4. The assembled retaining wall according to claim 1, characterized in that: The standard block is a regular polygon, and a concave-convex structure is arranged on the outer periphery of the regular polygon.

5. The construction method of the assembled retaining wall is characterized in that: The following steps are included: S1) Lay the strip foundation along the length of the construction area and stabilize it; S2) on the strip foundation, laying the unit blocks of the bottom retaining wall and the corner unit blocks by hoisting and horizontally moving to form a first foundation layer and a second foundation layer; S3) backfilling graded crushed stone on the first foundation layer so that the height of the graded crushed stone is at least as high as the pre-buried anchor box, installing the reinforcing bar anchor assembly for anchoring after road rolling and performing a compaction test to determine whether the backfill meets the standard; S4) when the unit blocks of the second layer of retaining wall are laid to the same height as the embedded anchor boxes of the second layer of retaining wall, repeat step S3) until the laying of the first retaining wall is completed; Repeating step S3) to step S4) to complete the construction of the second retaining wall, or simultaneously constructing the first retaining wall or the second retaining wall; and repeatedly completing the first retaining wall and the second retaining wall; S5) Slab laying and casting of bridge abutments.

6. The construction method of the assembled retaining wall according to claim 5, characterized in that: Before laying the strip foundation, the step also includes base treatment, specifically, excavating and backfilling the bottom graded crushed stone layer, and vibrating and compacting it so that its compaction degree reaches the set requirements.

7. The construction method of the assembled retaining wall according to claim 5, characterized in that: The strip foundation laying also includes laying a plurality of strip foundations in a stepped manner along the length direction of the construction area when the foundation elevation changes, and the height difference between adjacent successions is half of the unit block height, and a slope is placed between adjacent steps.

8. The construction method of the assembled retaining wall according to claim 5, characterized in that: It also includes the laying of half-width unit blocks, specifically, laying half-width unit blocks at intervals on the strip foundation and the retaining wall of the last layer.

9. The construction method of the assembled retaining wall according to claim 8, characterized in that: It also includes position adjustment between adjacent unit blocks and between half-width unit blocks and unit blocks, specifically, the position adjustment is performed by plugging with wooden wedges and temporarily fixing with reinforcement devices.

10. The construction method of the assembled retaining wall according to claim 5, characterized in that: The installation of the tie rod anchor assembly for anchoring specifically involves opening the cover of the anchor box, connecting the steel bars into the slot of the anchor box, the connecting steel bars drive the anchor box to move into the slot, and anchoring is achieved by filling soil.

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