Chair-type double-row pile slope support

Abstract

The utility model discloses a chair formula double -row pile side slope support belongs to side slope support technical field, including the front row stake and rear row stake of partial embedding original ground and setting up and having certain interval, the top of front row stake and rear row stake is provided with L type retaining wall, and L type retaining wall includes horizontal bottom plate and the vertical side wall of contact with the earthwork, the utility model discloses can effectively solve the space utilization problem of high and big fill, has saved the land space of support structure, and has effectively reduced the overall cost of side slope support.

Description

Technical Field

[0001] This utility model belongs to the field of slope protection technology, specifically relating to a chair-type double-row pile slope protection. Background Technology

[0002] In mountainous engineering construction, excavation and embankment projects are often characterized by their massive scale. These projects require large-scale excavation and embankment of the mountainside to meet the terrain requirements. The embankment slopes, in particular, are often very high, typically ranging from several meters to tens of meters. More importantly, strict land acquisition boundaries present significant challenges to the selection of slope protection structures.

[0003] In current engineering practice, commonly used slope protection structures include gravity retaining walls, pile-slab walls, and buttress retaining walls. These structures, with their inherent structural characteristics, can barely meet the basic requirements of embankment projects with a height not exceeding 8 meters. Gravity retaining walls primarily rely on their own weight to resist the lateral pressure of the soil; they are simple in structure and easy to construct, making them widely used in low-fill projects. Pile-slab walls consist of piles and slabs; the piles provide anchorage by penetrating deep into the ground, while the slabs prevent soil sliding, providing good support for medium-height embankment slopes. Buttress retaining walls enhance the rigidity and stability of the wall through buttresses, making them suitable for embankment projects within a certain height range.

[0004] However, when the height of the fill exceeds 8 meters, these traditional support structures reveal numerous problems. Firstly, the displacement of the support structure is insufficient. As the fill height increases, the lateral pressure exerted by the soil on the support structure increases significantly, and the lateral displacement resistance of traditional structures cannot keep up, easily leading to excessive deformation and affecting the overall stability of the slope. Secondly, the amount of support work becomes extremely large. To balance the enormous soil pressure, the size of the structure and the amount of materials used need to be increased, which not only prolongs the construction period but also significantly increases the construction difficulty. Thirdly, the support structure encroaches on the internal space of the project. Due to the limitations of the land acquisition boundary, traditional structures must extend inward to ensure stability, causing significant interference with the layout of internal buildings and structures, and may even make some designs impossible to implement.

[0005] In conclusion, existing slope protection structures are insufficient to meet the actual needs of large-scale fill projects in mountainous areas. Therefore, it is particularly urgent and important to invent a slope protection structure that can effectively solve the problem of space utilization in large-scale fill projects, has a small footprint, and low construction cost. This will not only improve the safety and stability of the project but also reduce project costs and increase land use efficiency, which is of great significance to the development of engineering construction in mountainous areas. Utility Model Content

[0006] The purpose of this utility model is to provide a chair-type double-row pile slope support, which can effectively solve the space utilization problem of high fill, occupy little space, and have low cost.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A chair-type double-row pile slope protection includes a front row of piles and a rear row of piles partially embedded in the original ground and arranged side by side with a certain spacing. An L-shaped retaining wall is provided on the top of the front row of piles and the rear row of piles. The L-shaped retaining wall includes a horizontal bottom plate and a vertical side wall in contact with the backfill soil.

[0009] A further improvement of this utility model is that a retaining plate is provided on the part above ground between the two front piles.

[0010] A further improvement of this utility model is that: a pair of triangular buttresses are provided between the side wall and the bottom plate.

[0011] A further improvement of this utility model is that: the bottom of the L-shaped retaining wall is provided with a horizontal short unloading plate extending into the backfill.

[0012] A further improvement of the present invention is that the front row of piles, the rear row of piles, the L-shaped retaining wall and the buttress are all reinforced concrete components.

[0013] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows:

[0014] This utility model can effectively support the soil behind the fill slope wall. Through the combination structure, the top L-shaped retaining wall supports the upper soil, the short unloading plate can adjust the distribution of soil pressure behind the wall, and the buttress plate controls the internal force deformation of the wall. The lower front and rear piles provide anti-slip and displacement constraints for the top L-shaped retaining wall, ensuring the stability and deformation of the L-shaped retaining wall; the lower front and rear piles support the lower soil. By setting reasonable pile spacing, row spacing, pile diameter and pile length, the soil pressure behind the piles is balanced, the slope displacement is limited, and the overall stability of the slope is ensured. It is suitable for fill slopes with limited space and a height greater than 8m, especially for fill slopes in soft soil areas. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a side view of the present invention;

[0017] Among them, 1. front row of piles; 2. rear row of piles; 3. L-shaped retaining wall; 4. buttress board; 5. retaining board; 6. short unloading board; 7. side wall; 8. bottom plate. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to embodiments:

[0019] like Figure 1 and Figure 2 As shown, a chair-type double-row pile slope support includes a front row of piles 1, a rear row of piles 2, an L-shaped retaining wall 3, a buttress 4, a retaining plate 5, a short unloading plate 6, a side wall 7, and a base plate 8. The front row of piles 1 is located on the outer side, and the rear row of piles 2 is located on the side closer to the backfill. The lower halves of both are embedded in the ground and arranged side by side with a certain distance between them. An L-shaped retaining wall 3 is set on the top of the front row of piles 1 and the rear row of piles 2. The L-shaped retaining wall 3 includes two parts: a horizontally placed base plate 8 and a vertically placed side wall 7 that contacts the backfill. The bottom of the base plate 8 contacts the top of the front row of piles 1 and the rear row of piles 2.

[0020] This chair-type double-row pile slope support structure is a highly efficient support system designed for complex slope environments. The components work together to form a protective pattern that combines stability and practicality.

[0021] The front row of piles 1 and the rear row of piles 2 are combined with a mechanically optimized spacing. This not only avoids stress concentration caused by the two rows of piles being too close together, but also evenly distributes the pressure of the backfill soil through synergistic force distribution, jointly bearing the load of the slope. The parallel arrangement of the two rows of piles is like installing "double insurance" for the slope, jointly resisting the lateral thrust of the slope soil and significantly improving the overall structure's resistance to deformation.

[0022] The L-shaped retaining wall 3, located atop the two rows of piles, serves as the "top cover" of the entire structure. Its horizontally placed base plate 8 is in close contact with the tops of the front row of piles 1 and the rear row of piles 2. This connection method not only achieves effective force transfer, distributing the load on the retaining wall to the two rows of piles, but also provides lateral restraint to the two rows of piles, enhancing their overall integrity. The vertically placed sidewall 7 is in direct contact with the backfill soil, using its own rigidity to prevent the backfill soil from collapsing. Its height and thickness are customized according to the height and pressure of the backfill soil, ensuring stable soil retention under various working conditions.

[0023] The retaining plate 5, installed above ground level between the two front row piles 1, further refines the retaining function. It fills the gap between the front row piles 1, preventing small soil masses from sliding down, and forms a unified retaining surface with the front row piles 1, making the stress on the front row piles 1 more even. The material and thickness of the retaining plate 5 are selected according to the actual conditions of the slope, ensuring both strength and economy.

[0024] The buttress panels 4 adopt a triangular design and are arranged side by side between the side wall 7 and the base plate 8. This structure makes full use of the stability principle of triangles. The buttress panels act like reinforcing ribs, effectively enhancing the connection strength between the side wall 7 and the base plate 8, resisting the outward overturning moment generated by the backfill pressure on the side wall 7, significantly improving the overall rigidity of the L-shaped retaining wall 3, and extending the service life of the structure.

[0025] The horizontal short unloading plate 6 extending towards the backfill at the bottom of the L-shaped retaining wall 3 is an ingenious unloading structure. It can transfer part of the weight of the backfill to the deeper stable soil, reducing the load directly acting on the L-shaped retaining wall 3 and the piles, thereby reducing the stress on the structure and increasing the safety reserve of the entire support system.

[0026] Furthermore, the front row of piles 1, the rear row of piles 2, the L-shaped retaining wall 3, and the buttress 4 are all constructed using reinforced concrete components. This material possesses high strength, high durability, and excellent overall integrity. The synergistic effect of the steel reinforcement and concrete enables the components to withstand significant tensile and compressive forces, adapting to the complex stress conditions of the slope environment. Simultaneously, reinforced concrete exhibits strong corrosion resistance, maintaining structural stability over long periods in various natural environments, thus providing a reliable guarantee for slope safety.

[0027] Instructions for use: After the site has been initially leveled, lay out the front row of piles 1 and the rear row of piles 2. The drilling method should be based on the strata and groundwater conditions, using mud slurry wall protection or dry drilling. When binding the reinforcing cage, the welding quality, dimensions, and spacing of the main reinforcement joints should all meet the design and construction specifications. After reaching the design depth, lower the reinforcing cage and pour the concrete to form the pile. After the pile body reaches 75% of the design strength, install the front row of pile retaining plate 5, backfill the soil in stages and compact it, with a compaction coefficient of not less than 0.95 or as required by the design, and backfill to the top elevation of the pile.

[0028] The reinforcement of the three buttress columns of the L-shaped retaining wall was tied, and the formwork was erected. Under the reinforced formwork system, concrete was poured and cured until it reached 75% of the design strength. Then, the soil was backfilled to the design elevation.

[0029] During the construction process, the installation of drainage holes and the placement of construction joints were carried out concurrently.

[0030] This application discloses a chair-type double-row pile slope protection method that can effectively ensure the stability and deformation of backfill slopes, while saving land area and construction costs.

[0031] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A chair-type double-row pile slope support, characterized in that: It includes a front row of piles (1) and a rear row of piles (2) partially embedded in the original ground and arranged side by side with a certain distance. The top of the front row of piles (1) and the rear row of piles (2) is provided with an L-shaped retaining wall (3). The L-shaped retaining wall (3) includes a horizontal bottom plate (8) and a vertical side wall (7) in contact with the backfill.

2. The chair-type double-row pile slope protection according to claim 1, characterized in that: A retaining plate (5) is installed above ground between the two front piles (1).

3. The chair-type double-row pile slope protection according to claim 1, characterized in that: A pair of triangular buttresses (4) are provided between the side wall (7) and the bottom plate (8).

4. The chair-type double-row pile slope protection according to claim 1, characterized in that: The bottom of the L-shaped retaining wall (3) is provided with a horizontal short unloading plate (6) extending into the backfill.

5. The chair-type double-row pile slope protection according to claim 1, characterized in that: The front row of piles (1), the rear row of piles (2), the L-shaped retaining wall (3), and the buttress (4) are all reinforced concrete components.

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