Prefabricated concrete retaining wall

Abstract

Prefabricated concrete retaining wall comprising a retaining wall (1) and a holding device (13), wherein the lower end of the retaining wall (1) is fixedly mounted to a positioning device (2), characterized in that the positioning device (2) comprises a docking groove (3), a steel rod (4), a hexagonal precast slab (5), a tension rod anchor box (6), a tension rod (7), an end steel pad (8) and an end concrete block (9), wherein the docking groove (3) is provided at the upper end and the lower end of the hexagonal precast slab (5), wherein the steel rod (4) is fixedly mounted inside the hexagonal precast slab (5), wherein tension rod anchor boxes (6) are fixedly mounted at equal intervals on both sides inside the hexagonal precast slab (5), wherein the tension rod (7) is fixedly connected to the end steel pad (8), and wherein the end steel pad (8) is fixedly mounted inside the end concrete block (9).and wherein the end of the tension rod (7) facing away from the end steel pad (8) is slidably mounted in the tension rod anchor box (6), wherein the tension rod anchor box (6) comprises a positioning steel plate (10), a tension rod end (11) and an alignment groove (12), wherein the alignment groove (12) is provided within the positioning steel plate (10), and wherein positioning steel plates (10) are symmetrically fixed in the tension rod anchor box (6), wherein the tension rod end (11) is slidably inserted into the alignment groove (12).

Description

Precast concrete retaining wall and installation method Technical Field

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

[0002] A reinforced retaining wall consists primarily of three components: the face wall, the reinforcement, and the filler. The friction between the filler and the reinforcement balances the earth pressure on the face plate (i.e., the internal stability of the reinforced wall). This composite structure also resists the earth pressure generated by the filler behind the reinforcement (i.e., the external stability of the reinforced wall).

[0003] Reinforced retaining wall is a lightweight support structure suitable for fill embankments. It occupies less space, has beautiful appearance, is easy to construct and has low cost. It is widely used in fill projects in my country's transportation, municipal and other departments, and has achieved good engineering results.

[0004] At present, most retaining walls on the market are installed and used by on-site stacking. However, after a period of use, the retaining walls built by this method have a small ground contact area between the bottom of the retaining wall and the ground, and the higher the retaining wall is, the worse the stability is. Therefore, a device is needed to improve the above problems.

[0005] Summary of the Invention

[0006] In view of the problems in the prior art, the present invention provides a precast concrete retaining wall and an installation method.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a precast concrete retaining wall and an installation method, including a retaining wall and a blocking device, wherein a positioning device is fixedly installed at the bottom end of the retaining wall, and the positioning device includes a docking groove, steel bars, a hexagonal precast plate, a reinforcement anchor box, steel bars, an end steel pad and an end concrete block, the docking groove is opened on the top and bottom ends of the hexagonal precast plate, the steel bars are fixedly installed inside the hexagonal precast plate, the reinforcement anchor box is fixedly installed at equal distances on both sides of the inside of the hexagonal precast plate, the reinforcement is fixedly connected to the end steel pad, the end steel pad is fixedly installed inside the end concrete block, and the end of the reinforcement away from the end steel pad is slidably sleeved inside the reinforcement anchor box, the reinforcement anchor box includes a positioning steel plate, a reinforcement end and an alignment groove, the alignment groove is opened inside the positioning steel plate, and the positioning steel plate is symmetrically fixed inside the reinforcement anchor box, and the reinforcement end is slidably inserted into the alignment groove.

[0008] The retaining wall also includes a blocking device, a receiving sleeve and an alignment key. The receiving sleeve is fixedly installed on the side end of the blocking device, and the alignment key is fixedly installed on the bottom end of the receiving sleeve.

[0009] The blocking device includes a lifting device, a covering device and a connecting device. The covering device is slidably inserted into the interior of the lifting device, and the lifting device is fixedly installed in the interior of the connecting device.

[0010] The lifting device includes a cover, an intercepting frame, a central cavity, a motor, a threaded rod, a guide rod and a first rack. The cover is fixedly mounted on the top of the central cavity, the intercepting frame is fixedly mounted on the top front end of the central cavity, and the cover is located above the intercepting frame. The first rack is symmetrically fixedly mounted on the inner top of the central cavity, the guide rod is fixedly mounted on the inner two ends of the central cavity, the motor is fixedly mounted on the inner bottom end of the central cavity, and the threaded rod is fixedly mounted on the top of the motor.

[0011] The covering device includes a reinforced support rod, a first docking block, a second docking block, a connecting rod, an L-shaped barrier vertical plate, a gear and a second rack. The gear is symmetrically rotatably installed at the bottom end of the L-shaped barrier vertical plate, the second rack is engaged with the side end of the gear, and the connecting rod slides through the L-shaped barrier vertical plate and is fixedly connected to the second rack. The second docking block is fixedly installed on the top end of the connecting rod. The reinforced support rod is rotatably installed on both sides of the inner side of the L-shaped barrier vertical plate, and the first docking block is fixedly installed on the inner side of the reinforced support rod close to the second docking block.

[0012] The connecting device includes a sliding key, a sleeve plate, a positioning pin, an extended base plate, a reinforcing cross bar, an outer shell and a top baffle plate. The extended base plate is fixedly mounted on both sides of the sleeve plate, the positioning pins are equidistantly fixedly mounted on the bottom end of the extended base plate, the outer shell is fixedly mounted on the top end of the extended base plate, the reinforcing cross bar is equidistantly fixedly mounted on the inner side of the outer shell, the top baffle plate is fixedly mounted on the top end of the outer shell, and the sliding key is symmetrically fixedly mounted on the side end of the outer shell facing away from the reinforcing cross bar.

[0013] The cover is arranged with a multi-layer sliding sleeve, and support grooves are symmetrically opened inside the rear end of the blocking frame. Vertical slots adapted to the sliding keys are opened on the front and rear ends of the central cavity, and the first rack and the gear are vertically aligned with the side end away from the second rack.

[0014] The sliding key is slidably inserted on the front and rear sides of the central cavity, the L-shaped blocking vertical plate is threadedly sleeved on the threaded rod, and the alignment key is slidably inserted inside the sleeve plate.

[0015] A through hole is provided at the inner bottom end of the L-shaped baffle plate near the second rack, and the second rack is located inside the through hole. The opposite end surfaces of the first docking block and the second docking block are both inclined at 45°, and the top ends of the top baffle plate are both inclined at 45°.

[0016] A method for installing a precast concrete retaining wall comprises the following steps:

[0017] S1. First, according to the site layout, a site suitable for prefabrication is arranged and hardened. According to the construction schedule, a certain number of customized steel formworks are prepared, and steel bars, tie anchor boxes and rings are placed according to the design drawings. Then, concrete is poured and cured. During construction, the foundation cannot be completely flat, and cement mortar is needed to level the bottom before installing the hexagonal prefabricated panels.

[0018] S2. After that, the three processes of hexagonal prefabricated panel installation, reinforcement installation and sand filling are carried out alternately. The hexagonal prefabricated panel installation is hoisted by a small excavator, and a homemade clamp is used as a hoist. Sponge strips are used to block the gaps between the panels to prevent sand leakage. The tongue-and-groove structure ensures that the panels are tightly connected. After the first layer of panels is installed, sand filling is carried out in a timely manner. The compaction degree of sand filling is determined according to the design requirements. Heavy machinery is not allowed to enter within 1.5m of the panel. The panel is compacted by hand with a handheld plate compactor. The backfill height shall not exceed 375mm each time, and the height shall be adjusted according to the reinforcement position of the hexagonal prefabricated panel on site. After each compaction, a compaction test is carried out. If the compaction test does not meet the standard, the site needs to be re-compacted.

[0019] S3. Finally, before installing the reinforcement, the cover of the reinforcement anchor box reserved in the hexagonal precast plate should be removed. The front end of the reinforcement needs to be inserted from the wide direction of the reinforcement anchor box, and then cut into the alignment groove in the narrow direction for fixation. The rear end of the reinforcement needs to be inserted into a precast concrete block with a block size of 200x200x100mm. The rear end of the reinforcement is upset. After the reinforcement passes through the precast concrete block, it is fixed with an iron plate as a pad.

[0020] Beneficial effects of the present invention:

[0021] First, the present invention precisely aligns the tie rods inside the positioning device with the tie rod anchor box, so that the hexagonal precast panels can be kept taut at all times, thereby preventing the retaining wall from having an unstable foundation when in use. In addition, the interior of the tie rod anchor box also has a self-locking function, which prevents the tie rods from falling off from the hexagonal precast panels and enhances the installation stability of the retaining wall.

[0022] Secondly, when the motor inside the lifting device of the present invention is started, it can drive the threaded rod to indirectly lift the L-shaped blocking vertical plate, so that the top blocking area of ​​the retaining wall can be strengthened. Moreover, when the L-shaped blocking vertical plate moves, it can indirectly drive the strengthening support rod to rotate outward through the second rack, thereby driving the strengthening support rod to fit with the blocking frame, thereby improving the supporting strength of the L-shaped blocking vertical plate and completing the work of strengthening the strength of the L-shaped blocking vertical plate in intercepting soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and examples.

[0024] FIG1 is a schematic diagram of the three-dimensional structure of the main body of the present invention from the front perspective;

[0025] FIG2 is a schematic diagram of the three-dimensional structure of the positioning device according to the present invention from a front perspective;

[0026] FIG3 is a top view of the positioning device of the present invention;

[0027] FIG4 is a schematic diagram of the three-dimensional structure of the reinforcement anchoring box according to the present invention from a front perspective;

[0028] FIG5 is a schematic diagram of the three-dimensional structure of the retaining wall according to the second embodiment of the present invention from a front perspective;

[0029] FIG6 is a partial cross-sectional schematic diagram of the blocking device of the present invention;

[0030] FIG7 is a partial cross-sectional schematic diagram of the lifting device of the present invention;

[0031] FIG8 is a schematic diagram of the front perspective three-dimensional structure of the covering device of the present invention;

[0032] FIG9 is a schematic diagram of the three-dimensional structure of the connecting device of the present invention from a front perspective.

[0033] In the figure: 1-retaining wall, 2-positioning device, 3-jointing groove, 4-rebar, 5-hexagonal precast plate, 6-tension anchor box, 7-tension bar, 8-end steel pad, 9-end concrete block, 10-positioning steel plate, 11-tension bar end, 12-alignment groove, 13-blocking device, 14-receiving sleeve, 15-alignment key, 16-lifting device, 17-covering device, 18-connecting device, 19-cover, 20-blocking frame, 21-central cavity, 22- Motor, 23-threaded rod, 24-guide rod, 25-first rack, 26-reinforced support rod, 27-first docking block, 28-second docking block, 29-connecting rod, 30-L-shaped baffle vertical plate, 31-gear, 32-second rack, 33-slide key, 34-sleeve plate, 35-positioning pin, 36-extended bottom plate, 37-reinforced cross bar, 38-housing, 39-top baffle plate. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] The present invention will be further described below with reference to the accompanying drawings.

[0037] Example 1

[0038] As shown in Figures 1, 2, 3 and 4, a precast concrete retaining wall and installation method of the present invention includes a retaining wall 1 and a blocking device 13. A positioning device 2 is fixedly installed at the bottom end of the retaining wall 1. The positioning device 2 includes a docking groove 3, steel bars 4, a hexagonal precast panel 5, a tie bar anchor box 6, a tie bar 7, an end steel plate 8 and an end concrete block 9. The docking groove 3 is opened on the top and bottom ends of the hexagonal precast panel 5, the steel bars 4 are fixedly installed inside the hexagonal precast panel 5, the tie bar anchor box 6 is equidistantly fixed on both sides of the inside of the hexagonal precast panel 5, and the tie bar 7 is fixedly connected to the end steel plate 8. The end steel pad 8 is fixedly installed inside the end concrete block 9, and the end of the reinforcement 7 away from the end steel pad 8 is slidably sleeved inside the reinforcement anchor box 6. The reinforcement anchor box 6 includes a positioning steel plate 10, a reinforcement end 11 and an alignment groove 12. The alignment groove 12 is opened inside the positioning steel plate 10, and the positioning steel plate 10 is symmetrically fixedly installed inside the reinforcement anchor box 6, and the reinforcement end 11 is slidably inserted into the alignment groove 12.

[0039] A method for installing a precast concrete retaining wall comprises the following steps:

[0040] S1. First, based on the site layout, a site suitable for prefabrication is arranged and hardened. According to the construction schedule, a certain number of custom steel formworks are prepared. Rebar 4, tie anchor boxes 6, and lifting rings are placed according to the design drawings. Then, concrete is poured and cured. During construction, the foundation cannot be completely flat, so cement mortar is needed to level the bottom, and then the hexagonal prefabricated panels 5 are installed.

[0041] S2. After that, the three processes of installing the hexagonal prefabricated panels 5, installing the reinforcement 7 and filling with sand are carried out alternately. The hexagonal prefabricated panels 5 are installed by a small excavator for hoisting, and homemade clamps are used as hoists. Sponge strips are used to block the gaps between the panels to prevent sand leakage. The tongue-and-groove structure ensures that the panels are tightly connected. After the first layer of panels is installed, sand filling is carried out in a timely manner. The compaction degree of sand filling is determined according to the design requirements. Heavy machinery is not allowed to enter within 1.5m of the panel. The panel is compacted by hand using a handheld plate compactor. The backfill height shall not exceed 375mm each time, and the height shall be adjusted according to the reinforcement position of the hexagonal prefabricated panels 5 on site. After each compaction, a compaction test is carried out. If the compaction test does not meet the standard, the site needs to be re-compacted.

[0042] S3. Finally, before installing the reinforcement 7, the cover of the reinforcement anchor box 6 reserved in the hexagonal precast panel 5 should be removed. The front end of the reinforcement 7 needs to be inserted from the width direction of the reinforcement anchor box 6, and then cut into the alignment groove 12 in the narrow direction for fixation. The rear end of the reinforcement 7 needs to be inserted into a precast concrete block with a block size of 200x200x100mm. The rear end of the reinforcement 7 is upset. After the reinforcement 7 passes through the precast concrete block, it is fixed with an iron plate as a pad.

[0043] The working principle of Example 1 is as follows: when in use, the end steel plate 8 and the end concrete block 9 are first pre-buried and installed under the ground respectively, and then the external lifting equipment is operated to lift the hexagonal precast panel 5 as a whole until the hexagonal precast panel 5 is moved to the specified installation position so that the tie bar end 11 can be horizontally aligned with the alignment groove 12. After that, the hexagonal precast panel 5 can be installed upright under the ground, and then the tie bar end 11 is moved and inserted into the inside of the alignment groove 12, so that the tie bar end 11 can be snapped into the inside of the alignment groove 12. After that, the tie bar 7 is pulled to adjust the position between the hexagonal precast panel 5 and the end steel plate 8. When the tie bar end 11 is tightened to the alignment groove 12, the external coarse sand can be backfilled to cover the end steel plate 8, the end concrete block 9 and the hexagonal precast panel 5, so that the stability of the retaining wall 1 can be improved, and the retaining wall 1 can be prevented from tilting or tipping during use.

[0044] Example 2

[0045] Based on Example 1, as shown in Figure 5, the retaining wall 1 also includes a blocking device 13, a receiving sleeve 14 and an alignment key 15. The receiving sleeve 14 is fixedly installed on the side end of the blocking device 13, and the alignment key 15 is fixedly installed on the bottom end of the receiving sleeve 14.

[0046] As shown in FIG6 , the blocking device 13 includes a lifting device 16 , a covering device 17 and a connecting device 18 . The covering device 17 is slidably inserted into the interior of the lifting device 16 , and the lifting device 16 is fixedly installed inside the connecting device 18 to support the covering device 17 for transmission.

[0047] As shown in Figure 7, the lifting device 16 includes a cover 19, an intercepting frame 20, a central cavity 21, a motor 22, a threaded rod 23, a guide rod 24 and a first rack 25. The cover 19 is fixedly mounted on the top of the central cavity 21, the intercepting frame 20 is fixedly mounted at the top front end of the central cavity 21, and the cover 19 is located above the intercepting frame 20. The first rack 25 is symmetrically fixedly mounted on the inner top of the central cavity 21, the guide rod 24 is fixedly mounted on the two inner ends of the central cavity 21, the motor 22 is fixedly mounted on the inner bottom end of the central cavity 21, and the threaded rod 23 is fixedly mounted on the top of the motor 22. A square hole compatible with the L-shaped blocking vertical plate 30 is opened on the top of the central cavity 21, so that the L-shaped blocking vertical plate 30 can pass through the top of the central cavity 21.

[0048] As shown in Figure 8, the covering device 17 includes a reinforced support rod 26, a first docking block 27, a second docking block 28, a connecting rod 29, an L-shaped blocking vertical plate 30, a gear 31 and a second rack 32. The gear 31 is symmetrically rotatably installed at the bottom end of the L-shaped blocking vertical plate 30, the second rack 32 is engaged with the side end of the gear 31, and the connecting rod 29 slides through the L-shaped blocking vertical plate 30 and is fixedly connected to the second rack 32. The second docking block 28 is fixedly installed on the top end of the connecting rod 29. The reinforced support rod 26 is rotatably installed on both sides of the inner side of the L-shaped blocking vertical plate 30, and the first docking block 27 is fixedly installed on the inner side of the reinforced support rod 26 close to the second docking block 28. The limiting horizontal plate is symmetrically fixedly installed through the inner side of the L-shaped blocking vertical plate 30, and the connecting rod 29 slides through the inside of the limiting horizontal plate, so that the second docking block 28 can be ensured to move up and down in a straight line.

[0049] As shown in Figure 9, the connecting device 18 includes a sliding key 33, a sleeve plate 34, a positioning pin 35, an extended base plate 36, a reinforcing cross bar 37, an outer shell 38 and a top baffle 39. The extended base plate 36 is fixedly mounted on both sides of the sleeve plate 34, the positioning pins 35 are equidistantly fixedly mounted on the bottom end of the extended base plate 36, the outer shell 38 is fixedly mounted on the top of the extended base plate 36, the reinforcing cross bar 37 is equidistantly fixedly mounted on the inner side of the outer shell 38, the top baffle 39 is fixedly mounted on the top of the outer shell 38, and the sliding key 33 is symmetrically fixedly mounted on the side end of the outer shell 38 away from the reinforcing cross bar 37. The top end of the top baffle 39 is tilted at 45° to prevent external impurities from accumulating at the top of the outer shell 38.

[0050] The cover 19 adopts a multi-layer sliding sleeve arrangement, and support grooves are symmetrically opened inside the rear end of the blocking frame 20. Vertical card slots adapted to the sliding key 33 are opened on the front and rear ends of the central cavity 21. The first rack 25 is vertically aligned with the side end of the gear 31 away from the second rack 32. When the L-shaped blocking vertical plate 30 rises, it can drive the gear 31 to contact the first rack 25.

[0051] The sliding key 33 is slidably inserted on the front and rear sides of the central cavity 21, the L-shaped blocking vertical plate 30 is threadedly sleeved on the threaded rod 23, and the positioning key 15 is slidably inserted inside the sleeve plate 34, which facilitates the side-by-side installation of the shell 38.

[0052] A through hole is provided at the inner bottom end of the L-shaped baffle plate 30 near the second rack 32, and the second rack 32 is located inside the through hole. The opposite end surfaces of the first docking block 27 and the second docking block 28 are both inclined at 45°, and the top ends of the top baffle plate 39 are both inclined at 45° to prevent external impurities from accumulating on the top of the shell 38.

[0053] When implementing this embodiment, when the retaining wall 1 is in use, the motor 22 can be started to drive the threaded rod 23 to rotate, and the bottom end of the L-shaped barrier vertical plate 30 is threadedly sleeved on the threaded rod 23, so that when the threaded rod 23 rotates, it can drive the L-shaped barrier vertical plate 30 to move upward, and the two ends of the L-shaped barrier vertical plate 30 are slidably sleeved on the guide rod 24, so that the L-shaped barrier vertical plate 30 can be ensured to move in a straight line. When the L-shaped barrier vertical plate 30 moves upward, it can drive the top end of the L-shaped barrier vertical plate 30 to squeeze the cover 19, so that the cover 19 can extend its length upward. The setting of the cover 19 can prevent external soil from entering the interior of the L-shaped barrier vertical plate 30. At the same time, when the L-shaped barrier vertical plate 30 moves upward, the top end of the L-shaped barrier vertical plate 30 can be driven to squeeze the cover 19, so that the cover 19 can extend its length upward. By setting the cover 19, external soil can be prevented from entering the interior of the L-shaped barrier vertical plate 30. When the vertical plate 30 continues to move upward, it can drive the gear 31 away from the side end of the second rack 32 and engage with the first rack 25. At this time, the bottom end of the strengthening support rod 26 passes the top of the central cavity 21. Afterwards, when the gear 31 moves along the surface of the first rack 25, it can drive the gear 31 to rotate, so that the second rack 32 will move upward. It is fixedly installed between the second docking block 28 and the second rack 32 through the connecting rod 29, so that when the second rack 32 moves upward, the second docking block 28 can be squeezed upward by the connecting rod 29. The opposite ends of the second docking block 28 and the first docking block 27 are both inclined at 45 degrees, so that the second docking block 28 and the first docking block can be lifted. When the second docking block 28 contacts the first docking block 27, the first docking block 27 is squeezed to move toward the front end, and the first docking block 27 is fixedly mounted on the reinforcing support rod 26, so that the first docking block 27 drives the reinforcing support rod 26 to rotate toward the front end, so that the reinforcing support rod 26 can be maintained in an inclined state. When the L-shaped blocking vertical plate 30 is subjected to external soil landslides or heavy objects pushing, the L-shaped blocking vertical plate 30 will be squeezed and tilted, causing the reinforcing support rod 26 to move to the support groove inside the blocking frame 20 close to the cover 19. The reinforcing support rod 26 is in contact with the inside of the blocking frame 20, so that a support point can be provided for the reinforcing support rod 26, thereby strengthening the support rod 26. The outer shell 38 is connected to the central cavity 21 by sliding the key 33 and inserting it into the vertical slots on both sides of the central cavity 21, so that the outer shell 38 can be moved downward in a straight line to complete the installation of the outer shell 38 and the central cavity 21. At the same time, when the outer shell 38 moves downward to the limit position, the outer shell 38 can be driven to fit the top of the central cavity 21, so as to prevent the outer shell 38 from falling. Afterwards, the outer shell 38 can be hoisted to the ground as a whole, and the positioning nails 35 are inserted under the ground to improve the stability of the outer shell 38 when it is placed. When the outer shell 38 is in use, the alignment key 15 is slidably inserted into the sleeve plate 34, so that multiple outer shells 38 can be connected together side by side. At the same time, the external concrete can be poured into the inside of the receiving sleeve 14, so that the gaps between the outer shells 38 can be filled.Complete the installation of the housing 38.

[0054] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A prefabricated concrete retaining wall, comprising a retaining wall (1) and a blocking device (13), wherein a positioning device (2) is fixedly mounted at the bottom end of the retaining wall (1), characterized in that: The positioning device (2) comprises a docking groove (3), a steel bar (4), a hexagonal precast panel (5), a tie bar anchoring box (6), a tie bar (7), an end steel pad (8) and an end concrete block (9), wherein the docking groove (3) is provided at the top and bottom ends of the hexagonal precast panel (5), the steel bar (4) is fixedly installed inside the hexagonal precast panel (5), the tie bar anchoring box (6) is fixedly installed at equal distances on both sides inside the hexagonal precast panel (5), the tie bar (7) is fixedly connected to the end steel pad (8), and the end The steel pad (8) is fixedly installed inside the end concrete block (9), and the end of the tie rod (7) away from the end steel pad (8) is slidably sleeved inside the tie rod anchor box (6), the tie rod anchor box (6) includes a positioning steel plate (10), a tie rod end (11) and an alignment groove (12), the alignment groove (12) is opened inside the positioning steel plate (10), and the positioning steel plate (10) is symmetrically fixedly installed inside the tie rod anchor box (6), and the tie rod end (11) is slidably inserted into the alignment groove (12).

2. A precast concrete retaining wall according to claim 1, characterized in that: The retaining wall (1) further comprises a blocking device (13), a receiving sleeve (14) and an alignment key (15), wherein the receiving sleeve (14) is fixedly mounted on the side end of the blocking device (13), and the alignment key (15) is fixedly mounted on the bottom end of the receiving sleeve (14).

3. A precast concrete retaining wall according to claim 2, characterized in that: The blocking device (13) comprises a lifting device (16), a covering device (17) and a connecting device (18); the covering device (17) is slidably inserted into the interior of the lifting device (16), and the lifting device (16) is fixedly mounted inside the connecting device (18).

4. A precast concrete retaining wall according to claim 3, characterized in that: The lifting device (16) includes a cover (19), an intercepting frame (20), a central cavity (21), a motor (22), a threaded rod (23), a guide rod (24) and a first rack (25), wherein the cover (19) is fixedly mounted on the top of the central cavity (21), the intercepting frame (20) is fixedly mounted at the top front end of the central cavity (21), and the cover (19) is located above the intercepting frame (20), the first rack (25) is symmetrically fixedly mounted on the inner top of the central cavity (21), the guide rod (24) is fixedly mounted on the inner two ends of the central cavity (21), the motor (22) is fixedly mounted on the inner bottom end of the central cavity (21), and the threaded rod (23) is fixedly mounted on the top of the motor (22).

5. The precast concrete retaining wall according to claim 4, characterized in that: The covering device (17) comprises a reinforcing support rod (26), a first docking block (27), a second docking block (28), a connecting rod (29), an L-shaped blocking vertical plate (30), a gear (31) and a second rack (32); the gear (31) is symmetrically rotatably mounted on the bottom end of the L-shaped blocking vertical plate (30); the second rack (32) is meshed with the side end of the gear (31); the connecting rod (29) slides through the L-shaped blocking vertical plate (30) and is fixedly connected to the second rack (32); the second docking block (28) is fixedly mounted on the top end of the connecting rod (29); the reinforcing support rod (26) is rotatably mounted on both sides of the inside of the L-shaped blocking vertical plate (30); and the first docking block (27) is fixedly mounted on the inner side of the reinforcing support rod (26) close to the second docking block (28).

6. The precast concrete retaining wall according to claim 5, characterized in that: The connecting device (18) comprises a sliding key (33), a sleeve plate (34), a positioning pin (35), an extended base plate (36), a reinforcing cross bar (37), an outer shell (38) and a top baffle plate (39), wherein the extended base plate (36) is fixedly mounted on both sides of the sleeve plate (34), the positioning pins (35) are fixedly mounted at equal distances on the bottom end of the extended base plate (36), the outer shell (38) is fixedly mounted on the top end of the extended base plate (36), the reinforcing cross bar (37) is fixedly mounted at equal distances on the inner side of the outer shell (38), the top baffle plate (39) is fixedly mounted on the top end of the outer shell (38), and the sliding key (33) is symmetrically fixedly mounted on the side end of the outer shell (38) away from the reinforcing cross bar (37).

7. The precast concrete retaining wall according to claim 6, characterized in that: The cover (19) is arranged in a multi-layer sliding sleeve, a supporting groove is symmetrically provided inside the rear end of the blocking frame (20), vertical slots adapted to the sliding key (33) are provided on the front and rear ends of the central cavity (21), and the first rack (25) is vertically aligned with the side end of the gear (31) away from the second rack (32).

8. The precast concrete retaining wall according to claim 7, characterized in that: The sliding key (33) is slidably inserted on the front and rear sides of the central cavity (21), the L-shaped blocking vertical plate (30) is threadedly sleeved on the threaded rod (23), and the alignment key (15) is slidably inserted inside the sleeve plate (34).

9. The precast concrete retaining wall according to claim 8, characterized in that: A through hole is formed at the inner bottom of the L-shaped baffle plate (30) near the second rack (32), and the second rack (32) is located inside the through hole. The surfaces of the opposite ends of the first docking block (27) and the second docking block (28) are both inclined at 45 degrees, and both ends of the top end of the top baffle plate (39) are both inclined at 45 degrees.

10. A method for installing a precast concrete retaining wall, using the precast concrete retaining wall as claimed in claim 1, characterized in that: It includes the following steps: S1. First, according to the site layout, a site that can be prefabricated is arranged and hardened. According to the construction schedule, a certain number of customized steel formworks are prepared, and steel bars (4), tie anchor boxes (6) and lifting rings are placed according to the design drawings. Then concrete is poured and maintained. During construction, the foundation cannot be completely flat, and cement mortar needs to be used to level the bottom, and then the hexagonal prefabricated panels (5) are installed; S2, then, the three processes of installation of hexagonal prefabricated panels (5), installation of tie bars (7) and sand filling are carried out alternately. The installation of hexagonal prefabricated panels (5) is carried out by a small excavator, and a self-made clamp ring is used as a lifting tool. Sponge strips are used to block the gap between the panels to prevent sand leakage. The tongue-and-groove structure allows the panels to be tightly connected. After the first layer of panels is installed, sand filling is carried out in a timely manner. The compaction degree of sand filling is determined according to the design requirements. Heavy machinery is not allowed to enter within 1.5m of the panel. The panel is compacted by hand using a handheld plate compactor. The backfill height shall not exceed 375mm each time, and the height shall be adjusted according to the tie bar position of the hexagonal prefabricated panels (5) on site. After each compaction, a compaction test is carried out. If the compaction test does not meet the standard, the site needs to be re-compacted; S3. Finally, before installing the tie bars (7), remove the The cover of the reinforcing bar anchoring box (6) is formed. The front end of the reinforcing bar (7) needs to be inserted from the wide direction of the reinforcing bar anchoring box (6) and then inserted into the alignment groove (12) in the narrow direction for fixation. The rear end of the reinforcing bar (7) needs to be inserted into a precast concrete block. The block size is 200x200x100mm. The rear end of the reinforcing bar (7) is upset. After the reinforcing bar (7) passes through the precast concrete block, it is fixed with an iron plate as a pad.

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