Prefabricated assembly type temporary flood control wall structure and construction method thereof

Abstract

The invention relates to the technical field of hydraulic engineering, and discloses a prefabricated assembly type temporary flood control wall structure and a construction method thereof.The prefabricated assembly type temporary flood control wall structure comprises a base assembly, a main frame assembly is arranged at the top of the base assembly, an adjusting assembly is slidably arranged at the top of the main frame assembly, and the main frame assembly and the adjusting assembly jointly form a wall body; the front face and the back face of the wall body are each provided with a protection assembly, the base assemblies, the main frame assembly, the protection assemblies and the adjusting assemblies jointly form prefabricated retaining wall units, and when the flood control wall is assembled, the base assemblies of every two adjacent prefabricated retaining wall units are fixed through fasteners.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy engineering, and in particular to a prefabricated assembled temporary flood control wall structure and a construction method thereof. Background Art

[0002] In water conservancy projects, when flood control walls need to be demolished or gaps need to be opened due to river regulation, temporary flood control walls need to be built in advance to meet the requirements of flood control during construction.

[0003] However, traditional temporary flood control walls mostly use brick structures and are built on-site, with a long construction period and low production efficiency. After dismantling, they become construction waste and cannot be reused, which does not meet the national requirements for promoting ecological civilization construction and green building development.

[0004] To this end, the present invention provides a prefabricated and assembled temporary flood control wall structure and a construction method thereof. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] A first aspect of the present invention provides a prefabricated assembled temporary flood control wall structure and a construction method thereof, comprising a base assembly, a main frame assembly being arranged on the top of the base assembly, an adjustment assembly being slidably arranged on the top of the main frame assembly, the main frame assembly and the adjustment assembly together constitute a wall body, the front and back sides of the wall body are both provided with protective assemblies, the base assembly, the main frame assembly, the protective assembly and the adjustment assembly together constitute a prefabricated retaining wall unit, and when assembling the flood control wall, the base assemblies of two adjacent prefabricated retaining wall units are fixed by fasteners.

[0007] Furthermore, the base assembly includes a base body, the back side of the base body is fixedly connected to a base fixing ear, the top of the base fixing ear is fixedly connected to a wall fixing ear, and one side of the base fixing ear and the wall fixing ear are both provided with through holes.

[0008] The wall fixing ears can clamp the wall from both sides, and the base body clamps the wall from the bottom to ensure the stability of the wall.

[0009] Furthermore, the main frame assembly includes a bottom frame, a square groove is opened on the inner side of the base body, the top of the bottom frame is clamped on the inner side of the square groove of the base body, and the distance between the two wall fixing ears is the same as the length of the bottom frame.

[0010] Furthermore, rotating shafts are installed on both sides of the bottom frame, the top of the bottom frame is rotatably connected to a side frame, the side frame and the bottom frame are rotatably connected via a rotating shaft, and a placement groove that matches the clearance of the rotating shaft is provided on one side of the wall fixing ear close to the bottom frame.

[0011] The space occupied is further reduced, and it is more convenient to unfold when in use.

[0012] Furthermore, the adjustment assembly includes a telescopic assembly, the top of the telescopic assembly is fixedly connected to an upper frame assembly, and limiting assemblies are provided on both sides of the top of the upper frame assembly. The limitation of the upper frame assembly relative to the bottom frame is cancelled by moving the limiting assembly, and the upper frame assembly is pulled upward to the top to be limited by the rotating shaft. At this time, the wall is in a state to be assembled.

[0013] Furthermore, the telescopic assembly includes a support rod, and second movable blocks are fixedly connected to both sides of the support rod, and a telescopic wall is fixedly connected to the outer side of the support rod. The bottom frame and the side frame close to the adjustment assembly are both provided with convex grooves that are gap-matched with the second movable block.

[0014] Furthermore, the limit assembly includes a C-shaped drive block, the top and bottom of the inner side of the C-shaped drive block are fixedly connected to the limit block, the side of the limit block away from the C-shaped drive block is fixedly connected to a convex clamping block, and the side of the convex clamping block close to the telescopic wall is fixedly connected to a spring.

[0015] Furthermore, the upper frame assembly includes an upper frame body, and the top and bottom of both sides of the upper frame body are provided with first movable holes that are clearance-matched with the convex block away from the spring side, and the top and bottom of the upper frame body are provided with second movable holes that are clearance-matched with the limit block on both sides, and the middle part of both sides of the upper frame body is fixedly connected with a first movable block, and the other end of the spring is fixedly connected to the side wall of the first movable hole of the upper frame body.

[0016] The wall can be quickly unfolded when in use, saving space occupied by the wall during transportation.

[0017] Furthermore, the protective component includes a rubber baffle, and both sides of the top of the rubber baffle are provided with placement grooves that match the gap of the C-shaped driving block. When the wall body is in a state to be assembled, the protective component is clamped on the front and back sides of the wall body.

[0018] When pouring plain concrete, the rubber baffle can prevent the plain concrete from coming into direct contact with the telescopic wall.

[0019] A second aspect of the present invention provides a construction method for a prefabricated temporary flood control wall structure, comprising the following steps: S1. adjusting the length of the prefabricated retaining wall unit according to the target flood control wall length and determining the number of the prefabricated retaining wall units to be used, and inspecting the size and quality of each prefabricated retaining wall unit; S2, arranging the prefabricated retaining wall units side by side along the length direction of the flood control wall, fitting the left and right base fixing ears and the wall fixing ears of two adjacent prefabricated retaining wall units tightly one by one, and ensuring that the through holes of the base fixing ears are aligned one by one with the through holes of the wall fixing ears; S3, fixing the adjacent prefabricated retaining wall units one by one with the aligned base fixing ears and the wall body fixing ears by means of bolt fasteners to complete the assembly and fixation; S4. pouring a plain concrete cushion layer on the bottom surface of the assembled prefabricated retaining wall unit.

[0020] The beneficial effects of the present invention are: 1. The prefabricated and assembled temporary flood control wall structure and the construction method thereof described in the present invention are provided with a base assembly. When a plurality of prefabricated retaining wall units are spliced, the base fixing ears and the wall fixing ears of two adjacent prefabricated retaining wall units fit tightly together. After the wall fixing ears are fixed, the wall fixing ears can clamp the wall from both sides, and the base body clamps the wall from the bottom, thereby ensuring the stability of the wall.

[0021] 2. The prefabricated temporary flood control wall structure and the construction method thereof described in the present invention are provided with a frame assembly and an adjustment assembly that cooperate with each other, and the frame assembly and the adjustment assembly together form a wall body, such as Figure 4 As shown, the wall occupies the smallest space at this time, which is convenient for transportation. When the prefabricated retaining wall units need to be assembled, the wall can be unfolded to the following state: Figure 2 As shown, at this time, the wall body is in a state to be assembled, and it is quick to assemble and disassemble, and can be reused many times, thus saving construction time.

[0022] 3. The prefabricated temporary flood control wall structure and its construction method described in the present invention are provided with a side frame, and the side frame is rotated to Figure 4 The state shown is the state where the wall occupies the smallest area, which is easier to store and further reduces the space occupied. When in use, it only needs to be rotated again until the bottom frame and the side frame are in the same straight line to realize the sliding of the adjustment component, which makes storage and unfolding more convenient.

[0023] 4. The prefabricated assembled temporary flood control wall structure and the construction method thereof described in the present invention are provided with a protective component. When pouring plain concrete, the rubber baffle can prevent the plain concrete from directly contacting the telescopic wall surface. When disassembling the prefabricated retaining wall unit and reducing the volume of the wall body, the protective component is disassembled to expose the telescopic wall surface. The telescopic wall surface can be normally extended and retracted to the minimum state, and the rubber baffle can enhance the waterproof performance of the prefabricated retaining wall unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the assembly state of the prefabricated retaining wall unit of the present invention; Figure 2 is an exploded schematic diagram of a prefabricated retaining wall unit in the present invention; Figure 3 It is a structural schematic diagram of the main frame assembly in the present invention; Figure 4 It is a structural schematic diagram of the main frame assembly and the adjustment assembly in the present invention; Figure 5 It is a schematic diagram of the structural explosion of the regulating component in the present invention.

[0025] Figure 6 It is a schematic diagram of the structural cross section of the telescopic component in the present invention.

[0026] Description of reference numerals: 1. Base assembly; 101. Base body; 102. Base fixing ear; 103. Wall fixing ear; 2. Main frame assembly; 201. Bottom frame; 202. Side frame; 203. Rotation axis; 3. Protection assembly; 301. Rubber baffle; 302. Placement slot; 4. Adjustment assembly; 401. Upper frame assembly; 4011. Upper frame body; 4012. First movable block; 402. Telescopic assembly; 4021. Telescopic wall; 4022. Support rod; 4023. Second movable block; 403. Limit assembly; 4031. C-type drive block; 4032. Convex block; 4033. Spring; 4034. Limit block. DETAILED DESCRIPTION

[0027] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0028] like Figures 1 to 5 As shown, a prefabricated temporary flood control wall structure according to an embodiment of the present invention is shown in Figure 1 , Figure 2 , including a base component 1, a main frame component 2 is arranged on the top of the base component 1, an adjustment component 4 is slidably arranged on the top of the main frame component 2, the main frame component 2 and the adjustment component 4 together constitute a wall body, and the front and back sides of the wall body are both provided with protection components 3. The base component 1, the main frame component 2, the protection component 3 and the adjustment component 4 together constitute a prefabricated retaining wall unit. When assembling the flood control wall, the base components 1 of two adjacent prefabricated retaining wall units are fixed by fasteners.

[0029] Please refer to Figure 2 The base assembly 1 includes a base body 101, a base fixing ear 102 is fixedly connected to the back of the base body 101, a wall fixing ear 103 is fixedly connected to the top of the base fixing ear 102, and a through hole is opened on one side of the base fixing ear 102 and the wall fixing ear 103.

[0030] Please refer to Figure 1 , Figure 2 , Figure 3 The main frame assembly 2 includes a bottom frame 201 , a square groove is provided on the inner side of the base body 101 , the top of the bottom frame 201 is clamped on the inner side of the square groove of the base body 101 , and the distance between the two wall fixing ears 103 is the same as the length of the bottom frame 201 .

[0031] Specifically, the thickness of the wall fixing ear 103 is the distance from the front of the bottom frame 201 to the back of the base fixing ear 102. The back of the base fixing ear 102 and the back of the wall fixing ear 103 are on the same straight line. The through hole of the wall fixing ear 103 is located on the back of the bottom frame 201. The sum of the thickness of the two wall fixing ears 103 and the length of the bottom frame 201 is the same as the length of the base body 101, ensuring that when multiple prefabricated retaining wall units are spliced, the two adjacent prefabricated retaining wall units are tightly fitted, and after fixing the wall fixing ears 103, the wall fixing ears 103 can clamp the wall from both sides, and the base body 101 clamps the wall from the bottom to ensure the stability of the wall.

[0032] Please refer to Figure 2 , Figure 3 A rotating shaft 203 is installed on both sides of the bottom frame 201, and the top of the bottom frame 201 is rotatably connected to the side frame 202. The side frame 202 and the bottom frame 201 are rotatably connected through the rotating shaft 203. A placement groove that is clearance-matched with the rotating shaft 203 is opened on the side of the wall fixing ear 103 close to the bottom frame 201.

[0033] Specifically, when the wall is stored, the side frame 202 can be rotated to Figure 4 In the state shown, the wall occupies the smallest area, which is easier to store and further reduces the occupied space. When in use, the adjustment component 4 can be slid by simply rotating it again until the bottom frame 201 and the side frame 202 are in the same straight line, making storage and unfolding more convenient.

[0034] Please refer to Figure 4 , Figure 5The adjustment component 4 includes a telescopic component 402, and the top of the telescopic component 402 is fixedly connected to the upper frame component 401. Limiting components 403 are arranged on both sides of the top of the upper frame component 401. The limit of the upper frame component 401 relative to the bottom frame 201 is cancelled by moving the limiting component 403, and the upper frame component 401 is pulled to the top until it is limited by the rotating shaft 203 at the top. At this time, the wall is in a state to be assembled.

[0035] Please refer to Figure 4 , Figure 5 The telescopic component 402 includes a support rod 4022, and the second movable blocks 4023 are fixedly connected to both sides of the support rod 4022. The outer side of the support rod 4022 is fixedly connected to the telescopic wall 4021. The bottom frame 201 and the side frame 202 close to the adjustment component 4 are both provided with convex grooves that are gap-matched with the second movable block 4023.

[0036] Specifically, Figure 6 As shown, the telescopic wall 4021 is in a state of minimum footprint, at which time the telescopic wall 4021 is corrugated, and at this time the distance between two adjacent support rods 4022 is also the smallest, wherein the support rods 4022 are equidistantly distributed on the inner side of the telescopic wall 4021, and the support rods 4022 penetrate the longitudinal internal space of the telescopic wall 4021; Since the telescopic wall 4021 is elastic and made of rubber, the second movable blocks 4023 are fixedly connected to both sides of each support rod 4022, and the second movable blocks 4023 are clamped in the convex grooves of the bottom frame 201 and the convex grooves of the side frame 202 so that the telescopic assembly 402 is clamped in the inner side of the convex grooves of the bottom frame 201 and the convex grooves of the side frame 202. By pulling the upper frame assembly 401 to the top, the telescopic assembly 402 moves along the convex grooves of the bottom frame 201 and the convex grooves of the side frame 202. At this time, the telescopic wall 4021 is squeezed to stretch, deform and flatten. Figure 2 As shown, the distance between the support rods 4022 is synchronously expanded as the telescopic wall 4021 is flattened, and the support rods 4022 support the telescopic wall 4021 to ensure that it will not deform during repeated telescopic process.

[0037] Please refer to Figure 4 , Figure 5 The limit assembly 403 includes a C-shaped driving block 4031, and the top and bottom of the inner side of the C-shaped driving block 4031 are fixedly connected to the limit block 4034. The side of the limit block 4034 away from the C-shaped driving block 4031 is fixedly connected to a convex block 4032, and the side of the convex block 4032 close to the telescopic wall 4021 is fixedly connected to a spring 4033.

[0038] Specifically, a limiting square groove is provided on one side of the bottom frame 201 and the side frame 202 close to the limiting assembly 403. When the convex clamping block 4032 moves to the limiting square groove of the bottom frame 201 and the limiting square groove of the rotating shaft 203, the convex clamping block 4032 will be clamped into the inner side of the limiting square groove of the bottom frame 201 and the limiting square groove of the rotating shaft 203 under the action of the spring 4033, thereby limiting the position of the upper frame assembly 401.

[0039] Please refer to Figure 4 , Figure 5 The upper frame assembly 401 includes an upper frame body 4011. The top and bottom of both sides of the upper frame body 4011 are provided with first movable holes that are clearance-matched with the convex block 4032 away from the spring 4033. The top and bottom of the upper frame body 4011 are provided with second movable holes that are clearance-matched with the limit block 4034. The middle of both sides of the upper frame body 4011 is fixedly connected with the first movable block 4012, and the other end of the spring 4033 is fixedly connected to the side wall of the first movable hole of the upper frame body 4011.

[0040] Specifically, the first movable block 4012 and the second movable block 4023 have the same size and shape, and are both clamped in the convex groove of the bottom frame 201 and the inner side of the convex groove of the side frame 202. The C-shaped driving blocks 4031 on both sides are pulled toward the middle direction to drive the limit block 4034 to move along the second movable hole, so that the limit block 4034 drives the convex clamping block 4032 to detach from the limit square groove of the bottom frame 201 along the first movable hole.

[0041] Please refer to Figure 2 The protective component 3 includes a rubber baffle 301. Both sides of the top of the rubber baffle 301 are provided with placement grooves 302 that are gap-matched with the C-shaped driving block 4031. When the wall body is in a state to be assembled, the protective component 3 is clamped on the front and back sides of the wall body.

[0042] Specifically, when pouring plain concrete, the rubber baffle 301 can prevent the plain concrete from directly contacting the telescopic wall 4021. When dismantling the prefabricated retaining wall unit and reducing the volume of the wall, the protective component 3 is dismantled to expose the telescopic wall 4021. The telescopic wall 4021 can be normally retracted to the minimum state, and the rubber baffle 301 can enhance the waterproof performance of the prefabricated retaining wall unit.

[0043] A construction method of a prefabricated temporary flood control wall structure, using the above-mentioned prefabricated temporary flood control wall structure, comprises the following steps: S1. Adjust the length of the prefabricated retaining wall unit according to the target flood control wall length and determine the number of prefabricated retaining wall units to be used, and inspect the size and quality of each prefabricated retaining wall unit; S2, arrange the prefabricated retaining wall units side by side along the length direction of the flood control wall, fit the left and right base fixing ears 102 and the wall fixing ears 103 of two adjacent prefabricated retaining wall units tightly one by one, and ensure that the through holes of the base fixing ears 102 are aligned one by one with the through holes of the wall fixing ears 103; S3, fixing the aligned base fixing ears 102 and wall fixing ears 103 of adjacent prefabricated retaining wall units one by one through bolt fasteners to complete the assembly and fixing; S4. Pour a plain concrete cushion layer on the bottom surface of the assembled prefabricated retaining wall unit.

[0044] How it works The initial state of the prefabricated retaining wall unit is the storage state, and the wall body, the protection component 3 and the base component are separated. Figure 4 As shown, the wall occupies the smallest space at this time, which is convenient for transportation; When the prefabricated retaining wall unit needs to be assembled, first unfold the wall to Figure 2 As shown, the wall is in a state to be assembled, and the unfolding process is: First, rotate the bottom frame 201 and the side frame 202 to be in the same straight line. Figure 3 As shown, the C-shaped driving blocks 4031 on both sides are pulled toward the middle direction so that the convex block 4032 is disengaged from the limiting square groove of the bottom frame 201, and then the limiting assembly 403 is released, and then the upper frame body 4011 is pulled to make the first movable block 4012 move along the convex groove of the bottom frame 201 and the convex groove of the side frame 202, and the upper frame body 4011 drives the telescopic wall 4021 to move toward the top together, so that the telescopic wall 4021 is extended, and the support rod 4022 drives the second movable block 4023 to move along the convex groove of the bottom frame 201 and the convex groove of the side frame 202 until the upper frame assembly 401 moves to the top, and the convex block 4032 is engaged with the limiting square groove of the side frame 202 under the action of the spring 4033 to complete the deployment.

[0045] When the wall body is in a state to be assembled, the rubber baffle 301 is clamped on the front and back sides of the wall body, and the base assembly 1 is clamped on the bottom of the wall body. Then the prefabricated retaining wall units are arranged side by side along the length direction of the flood control wall, and the left and right base fixing ears 102 and wall fixing ears 103 of the two adjacent prefabricated retaining wall units are tightly fitted one by one, and it is ensured that the through holes of the base fixing ears 102 are aligned one by one with the through holes of the wall fixing ears 103, and the two adjacent base fixing ears 102 and wall fixing ears 103 are connected by bolt fasteners. After the two adjacent prefabricated retaining wall units are tightly fitted and the wall fixing ears 103 are fixed, the wall fixing ears 103 can clamp the wall body from both sides.

[0046] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. A prefabricated temporary flood control wall structure, characterized in that: The invention comprises a base assembly (1), a main frame assembly (2) is arranged on the top of the base assembly (1), an adjustment assembly (4) is slidably arranged on the top of the main frame assembly (2), the main frame assembly (2) and the adjustment assembly (4) together constitute a wall body, and protection assemblies (3) are arranged on the front and back sides of the wall body. The base assembly (1), the main frame assembly (2), the protection assembly (3) and the adjustment assembly (4) together constitute a prefabricated retaining wall unit. When assembling a flood control wall, the base assemblies (1) of two adjacent prefabricated retaining wall units are fixed by fasteners.

2. A prefabricated temporary flood control wall structure according to claim 1, characterized in that: The base assembly (1) comprises a base body (101), the back of the base body (101) being fixedly connected to a base fixing ear (102), the top of the base fixing ear (102) being fixedly connected to a wall fixing ear (103), and through holes being provided on one side of each of the base fixing ear (102) and the wall fixing ear (103).

3. A prefabricated temporary flood control wall structure according to claim 2, characterized in that: The main frame assembly (2) comprises a bottom frame (201), a square groove is provided on the inner side of the base body (101), the top of the bottom frame (201) is clamped on the inner side of the square groove of the base body (101), and the distance between the two wall fixing ears (103) is the same as the length of the bottom frame (201).

4. A prefabricated temporary flood control wall structure according to claim 3, characterized in that: Rotating shafts (203) are installed on both sides of the bottom frame (201); the top of the bottom frame (201) is rotatably connected to a side frame (202); the side frame (202) and the bottom frame (201) are rotatably connected via the rotating shaft (203); and a placement groove that is clearance-matched with the rotating shaft (203) is provided on a side of the wall fixing ear (103) close to the bottom frame (201).

5. The prefabricated temporary flood control wall structure according to claim 4, characterized in that: The adjustment assembly (4) comprises a telescopic assembly (402), the top of the telescopic assembly (402) is fixedly connected to an upper frame assembly (401), and both sides of the top of the upper frame assembly (401) are provided with limit assemblies (403). By moving the limit assemblies (403), the limit of the upper frame assembly (401) relative to the bottom frame (201) is cancelled, and the upper frame assembly (401) is pulled upward to the top to be limited by the rotating shaft (203), and the wall is now in a state ready for assembly.

6. The prefabricated temporary flood control wall structure according to claim 5, characterized in that: The telescopic assembly (402) comprises a support rod (4022), the two sides of the support rod (4022) are fixedly connected to second movable blocks (4023), the outer side of the support rod (4022) is fixedly connected to a telescopic wall (4021), and the bottom frame (201) and the side of the side frame (202) close to the adjustment assembly (4) are both provided with convex grooves that are clearance-matched with the second movable blocks (4023).

7. The prefabricated temporary flood control wall structure according to claim 6, characterized in that: The limit assembly (403) comprises a C-shaped driving block (4031), the top and bottom of the inner side of the C-shaped driving block (4031) are fixedly connected to a limit block (4034), a side of the limit block (4034) away from the C-shaped driving block (4031) is fixedly connected to a convex clamping block (4032), and a side of the convex clamping block (4032) close to the telescopic wall (4021) is fixedly connected to a spring (4033).

8. The prefabricated temporary flood control wall structure according to claim 7, characterized in that: The upper frame assembly (401) comprises an upper frame body (4011), the top and bottom of both sides of the upper frame body (4011) are provided with first movable holes that are clearance-matched with the side of the convex block (4032) away from the spring (4033), the top and bottom of both sides of the upper frame body (4011) are provided with second movable holes that are clearance-matched with the limit block (4034), the middle of both sides of the upper frame body (4011) are fixedly connected with the first movable block (4012), and the other end of the spring (4033) is fixedly connected to the side wall of the first movable hole of the upper frame body (4011).

9. The prefabricated temporary flood control wall structure according to claim 7, characterized in that: The protective component (3) comprises a rubber baffle (301), and both sides of the top of the rubber baffle (301) are provided with placement grooves (302) that are clearance-matched with the C-shaped driving block (4031). When the wall body is in a state to be assembled, the protective component (3) is clamped on the front and back sides of the wall body.

10. A construction method of a prefabricated temporary flood control wall structure, using a prefabricated temporary flood control wall structure according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. adjusting the length of the prefabricated retaining wall unit according to the target flood control wall length and determining the number of the prefabricated retaining wall units to be used, and inspecting the size and quality of each prefabricated retaining wall unit; S2, arranging the prefabricated retaining wall units side by side along the length direction of the flood control wall, fitting the left and right base fixing ears (102) and the wall body fixing ears (103) of two adjacent prefabricated retaining wall units tightly one by one, and ensuring that the through holes of the base fixing ears (102) are aligned one by one with the through holes of the wall body fixing ears (103); S3, fixing the adjacent prefabricated retaining wall units one by one with the aligned base fixing ears (102) and the wall body fixing ears (103) by means of bolt fasteners, thereby completing assembly and fixing; S4. pouring a plain concrete cushion layer on the bottom surface of the assembled prefabricated retaining wall unit.

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