Combined retaining wall

Abstract

A combined retaining wall comprises an upper cantilever, a front check block, a lower wall body and a connecting piece, the upper cantilever used for supporting and retaining a rock-soil structure is fixed to the side, facing the rock-soil structure, of the top of the lower wall body through the connecting piece, and the front check block is fixed to the other side of the top of the lower wall body; the upper cantilever and the front stop block are fixed to the top of the lower wall body, the upper cantilever and the front stop block are arranged in an abutting mode, the face, facing the upper cantilever, of the front stop block abuts against the face, facing the front stop block, of the upper cantilever, and the bottom of the lower wall body is fixed to a foundation. It is ensured that the soil pressure of the rock-soil structure borne by the upper cantilever can be borne by the lower wall body through the front check block, the stability of the retaining wall is improved, meanwhile, segmented construction of the retaining wall is avoided, and the construction and time cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of geotechnical engineering technology, and in particular to a composite retaining wall. Background Technology

[0002] Currently, the main type of retaining wall in geotechnical engineering is the gravity retaining wall. Gravity retaining walls rely on their own weight to resist the earth pressure behind them, thereby providing support for the geotechnical structure behind the wall. Gravity retaining walls are mostly constructed using mortar-grouted rubble masonry. In areas lacking stone, precast concrete blocks can sometimes be used as masonry, or rubble concrete or concrete can be used for monolithic casting.

[0003] On the one hand, gravity retaining walls have large cross-sectional dimensions and heavy weight, making their construction time-consuming, labor-intensive, and costly. On the other hand, when gravity retaining walls are high, they need to be constructed in sections according to their height, resulting in low construction efficiency and increased construction costs.

[0004] To solve the above problems, there is an urgent need to design a modular retaining wall that is efficient to build and does not require segmented construction, while also reducing construction costs. Utility Model Content

[0005] The present invention aims to overcome the defects in the prior art and provide a modular retaining wall that is efficient to construct and does not require segmented construction, while also reducing construction costs.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a combined retaining wall, comprising an upper cantilever, a front stop block, a lower wall body, and connectors. The upper cantilever for supporting the soil and rock structure is fixed to the top side of the lower wall body facing the soil and rock structure via connectors. The front stop block is fixed to the other side of the top of the lower wall body. The side of the front stop block facing the upper cantilever abuts against the side of the upper cantilever facing the front stop block. The bottom of the lower wall body is fixed to the foundation.

[0007] As a preferred embodiment of this utility model, the upper cantilever includes a vertically arranged support part and a mounting part. The end of the support part away from the mounting part extends upward to support the rock and soil structure. The mounting part is provided with an array of several through holes.

[0008] As a preferred embodiment of this utility model, the connecting component includes a bolt, a steel plate, a high-strength threaded steel bar, and a steel sleeve. The steel sleeve is fixedly disposed inside the through hole, and a steel plate is disposed on the top of the steel sleeve.

[0009] In a preferred embodiment of this utility model, the steel plate is located inside or outside the through hole.

[0010] As a preferred embodiment of this utility model, one end of the high-strength threaded steel bar is fixedly installed inside the lower wall body, and the other end of the high-strength threaded steel bar passes through the steel sleeve and steel plate and is locked by bolts.

[0011] In a preferred embodiment of this utility model, the front stop includes connecting steel bars and longitudinal steel bars, wherein the connecting steel bars connect adjacent longitudinal steel bars in sequence.

[0012] As a preferred embodiment of this utility model, one end of the connecting steel bar extends into the interior of the lower wall.

[0013] In a preferred embodiment of this utility model, the front block and the lower wall are integrally cast with concrete.

[0014] In a preferred embodiment of this utility model, the height of the front stop is greater than the height of the mounting portion.

[0015] As a preferred embodiment of this utility model, the height of the support part is 1 / 5 to 2 / 3 of the height of the lower wall.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model fixes the upper cantilever and the front stop block to the top of the lower wall body. The upper cantilever and the front stop block are abutted together to ensure that the soil pressure of the rock and soil structure borne by the upper cantilever can be borne by the lower wall body through the front stop block, thereby improving the stability of the retaining wall. At the same time, it avoids the segmented construction of the retaining wall and reduces construction and time costs.

[0018] 2. The upper cantilever of this utility model reduces the self-weight of the retaining wall section and lowers the requirements for foundation strength, making it more widely applicable. The upper backfill of the rock and soil structure acts on the top of the lower wall body, indirectly increasing the self-weight of the retaining wall and improving its anti-sliding and anti-overturning capabilities.

[0019] 3. The front stop and lower wall of this utility model are both made of concrete, while the upper cantilever is a precast component, which improves construction efficiency and saves time and costs when the retaining wall is high.

[0020] 4. In this utility model, the upper cantilever and the lower wall are anchored together by connectors. The steel plate in the connector reduces stress concentration and achieves uniform force distribution at the anchorage. The steel sleeve in the connector ensures the accuracy of positioning of the high-strength threaded steel bars, making the retaining wall safe and stable as a whole. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a partial enlarged view of point A in this utility model;

[0023] Figure 3 This is a partial enlarged view of section B of this utility model;

[0024] The attached diagram is labeled as follows: 1. Upper cantilever, 2. Front stop block, 3. Lower wall, 4. Foundation, 5. Connector, 6. Geotechnical structure, 11. Support, 12. Installation part, 21. Connecting steel bar, 22. Longitudinal steel bar, 51. Bolt, 52. Steel plate, 53. High-strength threaded steel bar, 54. Steel sleeve, 121. Through hole. Detailed Implementation

[0025] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0026] like Figures 1-3 As shown, a composite retaining wall includes an upper cantilever 1, a front stop block 2, a lower wall body 3, and a connector 5. The upper cantilever 1 for supporting the soil structure 6 is fixed to the top of the lower wall body 3 facing the soil structure 6 via the connector 5. The front stop block 2 is fixed to the other side of the top of the lower wall body 3. The side of the front stop block 2 facing the upper cantilever 1 abuts against the side of the upper cantilever 1 facing the front stop block 2. The bottom of the lower wall body 3 is fixed to the foundation 4.

[0027] The front block 2 and the lower wall 3 are integrated by concrete pouring.

[0028] Specifically, the upper cantilever 1 is anchored to the lower wall 3 via connector 5, making the upper cantilever 1 and the lower wall 3 an integral unit, ensuring the integrity of the upper and lower parts of the retaining wall; the front stop 2 is abutted against the upper cantilever 1, and the front stop 2 assists in bearing the soil pressure of the rock and soil structure 6 on the upper cantilever 1, improving the overturning resistance of the upper cantilever 1; furthermore, the front stop 2 is fixed to the lower wall 3 by concrete pouring, ensuring that the soil pressure of the rock and soil structure 6 borne by the upper cantilever 1 can be borne by the lower wall 3 through the front stop 2, improving the stability of the retaining wall.

[0029] This utility model fixes the upper cantilever 1 and the front stop 2 to the top of the lower wall 3. The upper cantilever 1 and the front stop 2 are abutted together to ensure that the soil pressure of the upper cantilever 1 bearing the soil structure 6 can be borne by the lower wall 3 through the front stop 2, thereby improving the stability of the retaining wall. At the same time, it avoids the segmented construction of the retaining wall, saving time and reducing construction costs.

[0030] The upper cantilever 1 includes a vertically arranged support part 11 and a mounting part 12. The end of the support part 11 away from the mounting part 12 extends upward to support the soil and rock structure 6. The mounting part 12 is provided with an array of several through holes 121.

[0031] The upper cantilever 1 is an L-shaped precast component. On the one hand, it is precast with reinforced concrete, which ensures the dimensional accuracy and strength of the upper cantilever 1. Under the hoisting operation of mechanical equipment, it can be quickly and accurately installed on the lower wall 3, avoiding the segmented construction of the retaining wall, improving construction efficiency and ensuring safety during installation. On the other hand, the setting of the upper cantilever 1 reduces the self-weight of the retaining wall section and lowers the requirements for foundation strength, making it more widely applicable. The backfill of the geotechnical structure 6 acts on the top of the lower wall 3, indirectly increasing the self-weight of the retaining wall and improving its anti-sliding and anti-overturning capabilities.

[0032] The connector 5 includes a bolt 51, a steel plate 52, a high-strength threaded steel bar 53, and a steel sleeve 54. The steel sleeve 54 is fixedly installed inside the through hole 121, and the top of the steel sleeve 54 is provided with a steel plate 52.

[0033] The through hole 121 can be a round hole or a countersunk hole. When the through hole 121 is a round hole, the steel plate 52 cannot enter the through hole 121 and is only placed outside the through hole 121. When the through hole 121 is a countersunk hole, the steel plate 52 can enter the through hole 121 and is located inside the through hole 121. The steel plate 52 acts as a gasket in the connector 5 to distribute pressure and thus enhance the strength of the connection.

[0034] One end of the high-strength threaded steel bar 53 is fixedly installed inside the lower wall 3, and the other end of the high-strength threaded steel bar 53 passes through the steel sleeve 54 and the steel plate 52 and is locked by the bolt 51.

[0035] Specifically, the high-strength threaded steel bar 53 located inside the lower wall 3 passes through the steel sleeve 54 and the steel plate 52 and is locked by the bolt 51 to achieve the positioning and connection between the lower wall 3 and the upper cantilever 1. Furthermore, after the lower wall 3 and the upper cantilever 1 are connected, grout needs to be injected into the steel sleeve 54 to complete the anchoring connection and ensure the stability of the connection between the lower wall 3 and the upper cantilever 1.

[0036] The upper cantilever 1 and the lower wall 3 of this utility model are anchored together by connectors 5. The steel plate 52 in connectors 5 reduces stress concentration and achieves uniform force distribution at the anchorage. The steel sleeve 54 in connectors 5 ensures the accurate positioning of the high-strength threaded steel bar 53 and guarantees the overall safety and stability of the retaining wall.

[0037] The front stop 2 includes a connecting steel bar 21 and a longitudinal steel bar 22. The connecting steel bar 21 connects the adjacent longitudinal steel bars 22 in sequence, and one end of the connecting steel bar 21 extends into the interior of the lower wall 3.

[0038] Specifically, the longitudinal steel bars 22 in the front block 2 are the main load-bearing steel bars, bearing the soil pressure transmitted from the upper cantilever 1 to the soil structure 6 and effectively distributing it to the lower wall 3; in order to further improve the integrity of the front block 2 and the lower wall 3, so that the front block 2 and the lower wall 3 are stressed together, some of the longitudinal steel bars 22 in the front block 2 are located inside the lower wall 3. Correspondingly, the connecting steel bars 21 extend into the lower wall 3 to a certain depth, and tightly wrap all the longitudinal steel bars 22 in the form of ring stirrups.

[0039] The height of the front stop 2 is greater than that of the mounting part 12, which can support the weak connection between the support part 11 and the mounting part 12 and prevent damage to the upper cantilever 1 itself. The height of the support part 11 is 1 / 5 to 2 / 3 of the height of the lower wall 3, which can withstand the earth pressure of higher soil structures 6 as well as the earth pressure of general soil structures 6, making it more widely applicable.

[0040] The specific implementation of a composite retaining wall includes the following steps:

[0041] Step 1: Prefabricate the upper cantilever 1 and install a steel sleeve 54 in the through hole 121 of the upper cantilever 1 as a reserved hole for cooperation with the lower wall 3.

[0042] Step 2: Excavate foundation 4 to complete the installation of the lower wall 3 on foundation 4;

[0043] Step 3: After binding the connecting steel bars 21 and longitudinal steel bars 22 in the front stop block 2, some of the connecting steel bars 21 and longitudinal steel bars 22 extend into the lower wall body 3;

[0044] Step 4: Pour the lower wall 3 and the front block 2, and pre-embed high-strength threaded steel bars 53 at the position where they connect with the upper cantilever 1;

[0045] Step 5: After the lower wall 3 and the front stop 2 are formed, the upper cantilever 1 is hoisted and placed close to the front stop 2. The high-strength threaded steel bar 53 embedded in the lower wall 3 is aligned with the steel sleeve 54. The high-strength threaded steel bar 53 passes through the steel sleeve 54 and the steel plate 52 and is locked by the bolt 51. Then, grout is injected to fill the gap between the steel sleeve 54 and the high-strength threaded steel bar 53 to complete the anchoring connection.

[0046] Step 6: Check the gap between the front stop 2 and the upper cantilever 1, and fill it with mortar.

[0047] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0048] Although this document uses numerous reference numerals from the accompanying drawings, such as 1. upper cantilever, 2. front stop, 3. lower wall, 4. foundation, 5. connector, 6. geotechnical structure, 11. support, 12. mounting part, 21. connecting reinforcement, 22. longitudinal reinforcement, 51. bolt, 52. steel plate, 53. high-strength threaded steel bar, 54. steel sleeve, and 121. through hole, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A composite retaining wall, characterized in that: It includes an upper cantilever (1), a front stop (2), a lower wall (3) and a connector (5). The upper cantilever (1) for supporting the soil structure (6) is fixed to the side of the lower wall (3) facing the soil structure (6) by the connector (5). The front stop (2) is fixed to the other side of the lower wall (3). The side of the front stop (2) facing the upper cantilever (1) abuts against the side of the upper cantilever (1) facing the front stop (2). The bottom of the lower wall (3) is fixed on the foundation (4).

2. The composite retaining wall according to claim 1, characterized in that: The upper cantilever (1) includes a vertically arranged support part (11) and an installation part (12). The end of the support part (11) away from the installation part (12) extends upward to support the soil and rock structure (6). The installation part (12) is provided with a plurality of through holes (121).

3. A composite retaining wall according to claim 2, characterized in that: The connector (5) includes a bolt (51), a steel plate (52), a high-strength threaded steel bar (53), and a steel sleeve (54). The steel sleeve (54) is fixedly installed inside the through hole (121), and a steel plate (52) is installed on the top of the steel sleeve (54).

4. A composite retaining wall according to claim 3, characterized in that: The steel plate (52) is located inside or outside the through hole (121).

5. A composite retaining wall according to claim 3, characterized in that: One end of the high-strength threaded steel bar (53) is fixed inside the lower wall body (3), and the other end of the high-strength threaded steel bar (53) passes through the steel sleeve (54) and the steel plate (52) and is locked by the bolt (51).

6. A composite retaining wall according to claim 1, characterized in that: The front stop (2) includes connecting steel bars (21) and longitudinal steel bars (22), wherein the connecting steel bars (21) connect adjacent longitudinal steel bars (22) in sequence.

7. A composite retaining wall according to claim 6, characterized in that: One end of the connecting steel bar (21) extends into the interior of the lower wall (3).

8. A composite retaining wall according to claim 1, characterized in that: The front block (2) and the lower wall (3) are integrated by concrete pouring.

9. A composite retaining wall according to claim 2, characterized in that: The height of the front stop (2) is greater than the height of the mounting part (12).

10. A composite retaining wall according to claim 2, characterized in that: The height of the support (11) is 1 / 5 to 2 / 3 of the height of the lower wall (3).

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