Prefabricated retaining wall and precast girder connecting structure and construction method thereof

Abstract

This invention relates to the field of water conservancy engineering, and in particular to a connection structure and construction method for a precast retaining wall and a precast ground beam. The connection structure includes a beam and a wall, and a base for mounting the wall. The beam is positioned at the top of the wall. A grouting cavity is formed in the base, and a layer of crushed stone is placed within the grouting cavity. One end of the beam is mounted on the wall, and the other end is mounted on the crushed stone layer. A through hole is provided on the side of the beam facing the wall, and a positioning rod is installed within the through hole. One end of the positioning rod has a stop bar, and the other end has a limiting plate. A fastener connected to the positioning rod is provided on the side of the limiting plate facing away from the beam. This invention effectively reinforces the ground beam on the precast retaining wall, improving the stability of the precast ground beam on the precast retaining wall.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering, and in particular to a connection structure between a precast retaining wall and a precast ground beam and its construction method. Background Technology

[0002] Precast retaining walls are concrete retaining walls that are prefabricated in a factory and can be customized to the required size and shape. Precast retaining walls are commonly used in projects such as fences, slope protection, and bank protection, and can effectively prevent soil collapse and protect the safety of land and buildings.

[0003] Precast ground beams are concrete ground beams that are prefabricated in a factory and can be customized to the required size and strength. Precast ground beams are commonly used for structural support and reinforcement, effectively improving the load-bearing capacity and stability of the structure.

[0004] During the installation of precast ground beams on precast retaining walls along the riverbank, the thickness of the ground beams exceeds that of the retaining walls, causing one end of the ground beam's sidewall to be flush with the retaining wall's sidewall, while the other end extends to the ground. Due to the lower stiffness of the ground soil and the higher stiffness of the retaining walls, when the center of gravity of the retaining walls tilts towards the ground, a large portion of the weight of the ground beam is compressed onto the ground. The ground cannot bear the weight of the ground beam, causing it to sink and tilt towards the ground. In severe cases, this can even lead to the ground beam sliding onto the ground. Summary of the Invention

[0005] In order to reinforce the precast ground beam on the precast retaining wall and improve the stability of the precast ground beam on the precast retaining wall, the present invention provides a connection structure between the precast retaining wall and the precast ground beam and its construction method.

[0006] This invention provides a connection structure between a precast retaining wall and a precast ground beam, employing the following technical solution:

[0007] A precast retaining wall and precast ground beam connection structure includes a beam and a wall, and a base for setting the wall. The beam is set at the top of the wall, and the base has a grouting cavity with a crushed stone layer inside. One end of the beam is set on the wall, and the other end is set on the crushed stone layer.

[0008] The beam has a through hole on the side facing the wall, and a positioning rod is provided in the through hole. One end of the positioning rod is provided with a stop bar, and the other end is provided with a limiting plate. The side of the limiting plate facing away from the beam is provided with a fastener that is connected to the positioning rod.

[0009] In one specific implementation, a first reinforcing block is provided on the side of the beam facing the stop bar, and the stop bar is disposed within the first reinforcing block. A second reinforcing block is provided on the side of the beam facing the limiting plate, and the limiting plate and the fastener are both disposed within the second reinforcing block.

[0010] In one specific implementation scheme, the wall is provided with a tie rod, the beam has an insertion hole on the side facing the wall for inserting the tie rod, the side wall of the beam has a clearance hole communicating with the insertion hole, and a locking nut that is threadedly connected to the tie rod is provided in the clearance hole.

[0011] In one specific implementation, the pull rod is threaded with a locking ring.

[0012] In one specific implementation, the locking ring is annular in shape, and the sidewall of the locking ring protrudes beyond the sidewall of the beam.

[0013] The limiting plate has a spirally extending transmission ridge on the side facing the beam. The side wall of the locking ring has a transmission groove for the transmission ridge to engage. Multiple transmission grooves are evenly spaced along the circumference of the locking ring, so that the transmission ridge drives the locking ring to rotate as it rotates within the transmission groove.

[0014] In one specific implementation scheme, a support member is provided inside the injection cavity, with one end of the support member connected to the bottom surface of the beam and the other end connected to the inner wall of the injection cavity.

[0015] In one specific implementation, the support member includes a support rod and a base plate, the support rod being disposed on the base plate, and the top end of the support rod being connected to the beam.

[0016] In one specific implementation, the support rod includes a fixed rod and a telescopic rod, and the fixed rod has a telescopic hole for accommodating the telescopic rod.

[0017] In one specific implementation, the fixing rod is provided with a relief groove that communicates with the telescopic hole.

[0018] In one specific implementation, a support plate is provided on the side wall of the support rod.

[0019] In one specific implementation, the support plate has a piercing rod on the side facing the support rod, and the support rod is hollow.

[0020] In one specific implementation scheme, a first positioning groove is provided on the side wall of the beam, and a second positioning groove communicating with the first positioning groove is provided on the side wall of the wall. A positioning block is provided in the first positioning groove, and one end of the positioning block extends into the second positioning groove.

[0021] This invention also provides a construction method for a precast retaining wall and precast ground beam connection structure, employing the following technical solution:

[0022] A construction method for a precast retaining wall and precast ground beam connection structure, used for constructing the aforementioned precast retaining wall and precast ground beam connection structure, includes the following steps:

[0023] Prefabricate the walls and beams.

[0024] The wall is fixed within the base.

[0025] An injection cavity is excavated in the substrate, and the injection cavity is filled with crushed stone to form the crushed stone layer;

[0026] Grouting is injected into the gravel layer.

[0027] The beam is placed on the wall, the positioning rod is inserted through the through hole, and the stop bar abuts against the side wall of the beam. A limiting plate is sleeved on the other end of the positioning rod and locked by fasteners.

[0028] Concrete is poured on the side wall of the beam to form a first reinforcing block, and concrete is poured on the side of the beam where the limiting plate is located to form a second reinforcing block.

[0029] In one specific implementation scheme, before pouring the first reinforcing block, the through hole is cleaned to remove the soil inside, and then grouting is performed.

[0030] In one specific implementation scheme, when the injection cavity is filled with crushed stone, a support is provided in the injection cavity, and the top of the support protrudes from the top surface of the substrate; the top surface of the crushed stone layer is flush with or 0.5-1cm higher than the top surface of the wall.

[0031] In summary, the present invention has at least one of the following beneficial technical effects:

[0032] 1. By setting up a grouting cavity and placing a crushed stone layer inside the grouting cavity, the crushed stone layer, which has better rigidity than soil, can provide more stable support for the beam, improve the support effect of the foundation on the beam, and make the beam less prone to tilting, thus improving the stability of the beam on the wall.

[0033] 2. One end of the limiting plate is attached to the side wall of the wall to prevent the beam from sliding towards the base. The first and second reinforcing blocks provide further blocking effect for the beam, improving the support effect of the beam, so that the beam can still remain stable when guardrails or other structures are built on the beam later. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of Example 1.

[0035] Figure 2 It is a cross-sectional view showing the internal structure of the beam.

[0036] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0037] Figure 4 This is a cross-sectional view of the internal structure of the beam in Example 2.

[0038] Figure 5 This is a schematic diagram illustrating the structure of the limiting plate.

[0039] Figure 6 This is a schematic diagram illustrating the structure of the support component.

[0040] Figure 7 It is a cross-sectional view showing the internal structure of the support component.

[0041] Figure 8 This is a schematic diagram illustrating the structure of the positioning block.

[0042] Explanation of reference numerals in the attached drawings: 1. Wall; 2. Beam; 3. Base; 4. Crushed stone layer; 5. Positioning rod; 6. Limiting plate; 7. Fastener; 8. Stop bar; 9. First reinforcing block; 10. Second reinforcing block; 11. Tie rod; 12. Insertion hole; 13. Clearance hole; 14. Locking nut; 15. Locking ring; 17. Transmission ridge; 18. Transmission groove; 19. Support component; 191. Base plate; 192. Support rod; 193. Fixing rod; 194. Telescopic rod; 20. Clearance groove; 21. Support plate; 22. Piercing rod; 23. First positioning groove; 24. Second positioning groove; 25. Positioning block. Detailed Implementation

[0043] The following is in conjunction with the appendix Figure 1-7 The present invention will be described in further detail below.

[0044] Example 1:

[0045] Reference Figure 1 and Figure 2The precast retaining wall and precast ground beam connection structure includes a beam 2 and a wall 1. The wall 1 is fixed within a base 3. A grouting cavity is formed in the base 3, and the grouting cavity is filled with a crushed stone layer 4. The beam 2 is positioned at the top of the wall 1, with one end resting on the wall 1 and the other end supported by the crushed stone layer 4. The crushed stone layer 4 has better rigidity than soil and can withstand greater gravitational pressure, making it less prone to tilting under the pressure of the beam 2, thus improving the stability of the beam 2 on the wall 1.

[0046] By injecting cement grout into the crushed stone layer 4, the load-bearing capacity of the crushed stone layer 4 is further improved, providing better support for the beam 2.

[0047] Reference Figure 2 and Figure 3 Multiple through holes are provided on the bottom surface of the beam 2. The through holes extend from the end of the beam 2 near the crushed stone layer 4 to the end near the wall 1. A positioning rod 5 is inserted into the through hole. A stop bar 8 is fixed to the end of the positioning rod 5 near the crushed stone layer 4. A limiting plate 6 is provided at the end of the positioning rod 5 near the wall 1. The limiting plate 6 can slide along the positioning rod 5. A fastener 7 is threadedly connected to the positioning rod 5. The fastener 7 is specifically a nut.

[0048] Reference Figure 2 and Figure 3 After the positioning rod 5 is inserted into the through hole, the positioning rod 5 is pulled so that the side wall of the stop rod 8 is pressed tightly against the side wall of the beam 2. The nut is turned so that the limiting plate 6 is pressed tightly against the side wall of the beam 2 and the side wall of the wall 1, and a pulling force is applied to the beam 2 in the direction of the wall 1 to offset part of the pressure of the beam 2 on the crushed stone layer 4, reduce the pressure of the beam 2 on the crushed stone layer 4, and further prevent the beam 2 from tilting on the wall 1.

[0049] Reference Figure 1 and Figure 2 A first reinforcing block 9 is poured at the end of beam 2 near the crushed stone layer 4, and a stop bar 8 is installed inside the first reinforcing block 9. A second reinforcing block 10 is poured on the side wall of the end of beam 2 near the wall 1, and a limiting plate 6 and a nut are both installed inside the second reinforcing block 10. The first reinforcing block 9 supports beam 2, and the second reinforcing block 10 enhances the pulling effect of the limiting plate 6 on beam 2, thereby further improving the stability of beam 2 on wall 1 and minimizing the possibility of beam 2 tilting on wall 1.

[0050] Example 2:

[0051] Reference Figure 4 and Figure 5The difference between Embodiment 2 and Embodiment 1 is that multiple tie rods 11 are vertically fixed on the top surface of the wall 1, and multiple insertion holes 12 for inserting the tie rods 11 are provided on the beam 2. A clearance hole 13 communicating with the insertion hole 12 is provided on the side wall of the beam 2, and a locking nut 14 threadedly connected to the tie rod 11 is provided inside the clearance hole 13. The outer diameter of the locking nut 14 is larger than the diameter of the insertion hole 12, so that when the locking nut 14 is screwed onto the wall 1 on the tie rod 11, it can provide downward pressure to the beam 2, pressing the beam 2 tightly against the wall 1.

[0052] Reference Figure 4 and Figure 5 A locking ring 15 is threaded onto the tie rod 11. The locking ring 15 is located inside the relief hole 13 and is positioned above and below the locking nut 14. Rotating the locking ring 15 moves it toward the wall 1, and then moving the locking nut 14 toward the locking ring 15, forming a double-nut locking structure, which enhances the locking effect of the locking nut 14 on the beam 2.

[0053] Reference Figure 4 and Figure 5 The outer wall of the locking ring 15 protrudes from the side wall of the beam 2. Multiple transmission ribs 17 are fixed to the side of the limiting plate 6 facing the beam 2. The transmission ribs 17 extend spirally about the axis of the positioning rod 5, and the limiting plate 6 is threadedly connected to the positioning rod 5. A transmission groove 18 is provided on the outer wall of the locking ring 15 for the transmission ribs 17 to slide. Multiple transmission grooves 18 are spaced apart along the circumference of the locking wheel. As the limiting plate 6 rotates on the positioning rod 5, it gradually approaches the beam 2 until the transmission ribs 17 are engaged in the transmission grooves 18 on the locking ring 15. At this point, the limiting plate 6 continues to rotate, causing the locking wheel to rotate towards the locking nut 14. As the limiting plate 6 moves towards the beam 2, the locking ring 15 moves towards the wall 1 until the transmission ribs 17 are tightly against the side wall of the beam 2. Finally, the locking nut 14 is rotated to lock the locking ring 15. When the locking ring 15 is released, the limiting plate 6 needs to rotate in the opposite direction and overcome the locking force of the locking nut 14. The release of the limiting plate 6 requires the locking ring 15 to move toward the locking nut 14, forming an interlocking structure. This improves the locking stability of the locking ring 15 and the locking stability of the limiting plate 6.

[0054] Reference Figure 6 and Figure 7A support member 19 is provided inside the injection chamber. The support member 19 includes a support rod 192 and a base plate 191. The base plate 191 is disposed within the crushed stone layer 4 inside the injection chamber, and the support rod 192 is disposed on the base plate 191. The support rod 192 includes a fixed rod 193 and a telescopic rod 194. The fixed rod 193 is fixed to the top surface of the base plate 191, and a telescopic hole is provided on the fixed rod 193. The telescopic rod 194 is disposed within the telescopic hole and is threadedly connected to the fixed rod 193. The top end of the telescopic rod 194 abuts against the bottom surface of the beam 2, allowing the telescopic rod 194 to extend and retract within the fixed rod 193 while supporting the beam 2. The base plate 191 increases the contact area with the crushed stone layer 4, improving the stability of the telescopic rod 194 in supporting the beam 2.

[0055] Reference Figure 6 and Figure 7 Multiple vertically extending clearance grooves 20 are provided on the inner wall of the fixed rod 193. The clearance grooves 20 penetrate the top surface of the fixed rod 193, so that there is a gap between the telescopic rod 194 and the inner wall of the telescopic hole. Cement grout can enter the fixed rod 193 through the clearance grooves 20. After the cement grout hardens, it improves the stability of the telescopic rod 194 in the fixed rod 193 and improves the support stability of the telescopic rod 194 for the beam 2.

[0056] Reference Figure 6 and Figure 7 Multiple support plates 21 are provided on the outer wall of the fixed rod 193, and a piercing rod 22 is fixed on the side of the support plate 21 facing the fixed rod 193. After the telescopic rod 194 is positioned inside the fixed rod 193, it is inserted into the fixed rod 193 by piercing the side wall of the fixed rod 193 through the piercing rod 22. After the cement grout is poured into the fixed rod 193, the support plate 21 is fixed to the outer wall of the fixed rod 193. After the crushed stone layer 4 is filled, when the telescopic rod 194 is compressed by the beam 2, the pressure is distributed to the crushed stone layer 4 through the support plate 21, thereby improving the support stability of the telescopic rod 194 on the beam 2.

[0057] Reference Figure 8 A first positioning groove 23 is formed on the side wall of the beam 2 near the wall 1. A second positioning groove 24, which communicates with the first positioning groove 23, is formed on the side of the wall 1 opposite to the base 3. A positioning block 25 is provided in the first positioning groove 23, and the bottom end of the positioning block 25 extends into the second positioning groove 24. The positioning groove and the positioning block 25 are used to position the beam 2 on the wall 1, thereby improving the positioning accuracy of the beam 2 on the wall 1.

[0058] This invention also discloses a construction method for a precast retaining wall and precast ground beam connection structure, which is used in conjunction with the above-mentioned precast retaining wall and precast ground beam connection structure, and includes the following steps:

[0059] S100, prefabricated wall 1 and beam 2, fixing wall 1 within base 3.

[0060] S200, excavate a grouting cavity on the base 3, fill the grouting cavity with 1 / 4 of a crushed stone layer 4, and support member 19 is erected on the crushed stone layer 4. After the support member 19 is erected, fill the grouting cavity with crushed stone, and make the top surface of the support member 19 and the top surface of the crushed stone layer 4 both 0.5-1cm higher than the top surface of the wall 1.

[0061] S300, inject cement grout into the crushed stone layer 4 and wait for the cement grout to harden.

[0062] S400, hoist beam 2 onto wall 1, insert positioning rod 5 into the through hole, rotate limiting plate 6 to lock locking ring 15 onto pull rod 11, rotate locking nut 14 to lock locking ring 15. Screw nut onto positioning rod 5 to form double nut locking structure with limiting plate 6. Positioning block 25 is engaged in first positioning groove 23.

[0063] S500 cleans the through hole, removing gravel, soil, and other debris.

[0064] S600, the first reinforcing block 9 and the second reinforcing block 10 are cast on the side wall of beam 2, and cement grout is injected into the through hole.

[0065] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A precast retaining wall and precast ground beam connection structure, comprising a beam (2) and a wall (1), and a base (3) for setting the wall (1), wherein the beam (2) is disposed at the top of the wall (1), characterized in that: The substrate (3) has an injection cavity, and the injection cavity has a crushed stone layer (4). One end of the beam (2) is set on the wall (1), and the other end is set on the crushed stone layer (4). The beam (2) has a through hole on the side facing the wall (1), and a positioning rod (5) is provided in the through hole. One end of the positioning rod (5) is provided with a stop rod (8), and the other end is provided with a limiting plate (6). The side of the limiting plate (6) facing away from the beam (2) is provided with a fastener (7) connected to the positioning rod (5). The beam (2) is provided with a first reinforcing block (9) on the side facing the stop bar (8), and the stop bar (8) is located in the first reinforcing block (9). The beam (2) is provided with a second reinforcing block (10) on the side facing the limiting plate (6), and the limiting plate (6) and the fastener (7) are both located in the second reinforcing block (10). The wall (1) is provided with a tie rod (11), and the beam (2) facing the wall (1) is provided with a hole (12) for inserting the tie rod (11). The side wall of the beam (2) is provided with a clearance hole (13) communicating with the hole (12). The clearance hole (13) is provided with a locking nut (14) threadedly connected to the tie rod (11). A locking ring (15) is threaded onto the pull rod (11); The locking ring (15) is circular, and the sidewall of the locking ring (15) protrudes from the sidewall of the beam (2). The limiting plate (6) has a spirally extending transmission rib (17) on the side facing the beam (2). The side wall of the locking ring (15) has a transmission groove (18) for the transmission rib (17) to engage. The transmission groove (18) is evenly spaced along the circumference of the locking ring (15), so that the transmission rib (17) drives the locking ring (15) to rotate during the rotation of the transmission groove (18).

2. The connection structure between the precast retaining wall and the precast ground beam according to claim 1, characterized in that: The injection cavity is provided with a support member (19), one end of which is connected to the bottom surface of the beam (2), and the other end is connected to the inner wall of the injection cavity.

3. The connection structure between the precast retaining wall and the precast ground beam according to claim 2, characterized in that: The support member (19) includes a support rod (192) and a base plate (191). The support rod (192) is disposed on the base plate (191), and the top end of the support rod (192) is connected to the beam (2).

4. The connection structure between the precast retaining wall and the precast ground beam according to claim 3, characterized in that: The support rod (192) includes a fixed rod (193) and a telescopic rod (194), and the fixed rod (193) has a telescopic hole for accommodating the telescopic rod (194).

5. The connection structure between the precast retaining wall and the precast ground beam according to claim 4, characterized in that: The fixed rod (193) has a relief groove (20) that communicates with the telescopic hole.

6. The connection structure between the precast retaining wall and the precast ground beam according to claim 3, characterized in that: The support rod (192) has a support plate (21) on its side wall.

7. The connection structure between the precast retaining wall and the precast ground beam according to claim 6, characterized in that: The support plate (21) has a piercing rod (22) on the side facing the support rod (192), and the support rod (192) is hollow.

8. The connection structure between the precast retaining wall and the precast ground beam according to claim 1, characterized in that: The beam (2) has a first positioning groove (23) on its side wall, and the wall (1) has a second positioning groove (24) that communicates with the first positioning groove (23) on its side wall. The first positioning groove (23) has a positioning block (25) inside it, and one end of the positioning block (25) extends into the second positioning groove (24).

9. A construction method for a connection structure between a precast retaining wall and a precast ground beam, characterized in that: The method for constructing the precast retaining wall and precast ground beam connection structure as described in any one of claims 1-8 includes the following steps: Prefabricate the wall (1) and the beam (2). The wall (1) is fixed inside the base (3). An injection cavity is excavated on the substrate (3), and the injection cavity is filled with crushed stone to form the crushed stone layer (4); Grouting is injected into the crushed stone layer (4). The beam (2) is placed on the wall (1), the positioning rod (5) is inserted through the through hole, and the stop rod (8) abuts against the side wall of the beam (2). A limiting plate (6) is sleeved on the other end of the positioning rod (5) and locked by fasteners (7). Concrete is poured on the side wall of the beam (2) to form a first reinforcing block (9), and concrete is poured on the side of the beam (2) where the limiting plate (6) is provided to form a second reinforcing block (10).

10. The construction method of the precast retaining wall and precast ground beam connection structure according to claim 9, characterized in that: Before pouring the first reinforcing block (9), the through hole is cleaned and the soil inside the through hole is removed, and then grouting is performed.

11. The construction method of the precast retaining wall and precast ground beam connection structure according to claim 9, characterized in that: When filling the injection cavity with crushed stone, a support member (19) is provided in the injection cavity, and the top of the support member (19) protrudes from the top surface of the base (3); the top surface of the crushed stone layer (4) is flush with or higher than the top surface of the wall (1) by 0.5-1cm.

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