A three-row pile-slab wall structure for steep slope roadbed

Abstract

This invention relates to the field of road engineering technology, specifically to a three-row pile-slab wall structure for steep slope roadbeds; it includes a soil-bearing component and two supporting components; the supporting components include a second crossbeam, long piles, a first short pile, a second short pile, and a first crossbeam; the soil-bearing component supports the backfill, and the long piles, first short piles, second short piles, first crossbeam, and second crossbeam jointly bear the backfill and variable load pressure, reducing structural deformation and improving the overall stability and shear resistance of the structure; the backfill pressure on the long piles, first short piles, and second short piles is mainly in the vertical direction, increasing axial pressure, improving the stress on the long piles, first short piles, and second short piles, effectively controlling the structural deformation of the long piles, first short piles, and second short piles, and has the advantages of high rigidity and simple construction process.

Description

Technical Field

[0001] This invention relates to the field of road engineering technology, and in particular to a three-row pile-slab wall structure for steep slope roadbeds. Background Technology

[0002] Currently, steep slope roadbeds are a common engineering form in mountainous railway and highway projects. The slope filling method requires a large amount of earth and stone and occupies a large area. At the same time, the roadbed is prone to overall failure due to slope instability. When using traditional pile-slab walls and pile-beam retaining walls for slope support, the cantilever length of the piles increases when the slope is too steep or too high. This results in excessive pressure on the backfill soil, leading to excessively large pile cross-sections, reduced project stability, and increased project investment. In addition, traditional pile-slab walls have low stiffness, limited thrust bearing capacity, and complex construction structure selection. Therefore, a new type of pile-slab wall structure with high stiffness and simple construction technology is needed. Summary of the Invention

[0003] The purpose of this invention is to provide a three-row pile-slab wall structure for steep slope roadbeds, which has the advantages of high rigidity and simple construction process.

[0004] To achieve the above objectives, the present invention provides a three-row pile-slab wall structure for steep slope roadbeds. The three-row pile-slab wall structure includes a soil-bearing component and two supporting components. The two supporting components are located on both sides of the soil-bearing component. Each supporting component includes a second crossbeam, a long pile, a first short pile, a second short pile, and the first crossbeam. The second crossbeam is fixedly connected to the soil-bearing component and is located below the soil-bearing component. The long pile is fixedly connected to the second crossbeam and to the soil-bearing component, and is located on the side of the second crossbeam. The first short pile is fixedly connected to the second crossbeam and is located below the second crossbeam. The second short pile is fixedly connected to the second crossbeam and is located on the side of the second crossbeam away from the long pile. One end of the first crossbeam is fixedly connected to the long pile, and the end of the first crossbeam away from the long pile is fixedly connected to the first short pile, located between the long pile and the first short pile.

[0005] The soil-bearing component includes a retaining plate and a bearing plate; the retaining plate is fixedly connected to two of the long piles respectively and is located on the side of the two long piles near the second crossbeam; the bearing plate is fixedly connected to the retaining plate and to the second crossbeam, and is located above the second crossbeam.

[0006] The bearing plate can provide support for the backfill, and the retaining plate can block and limit the backfill.

[0007] The retaining plate has a first expansion joint; the first expansion joint is located on the side of the retaining plate.

[0008] The first expansion joint can prevent the retaining plate from undergoing severe deformation and cracking due to temperature differences and concrete shrinkage.

[0009] The retaining plate also has two drainage holes; the two drainage holes are located on both sides of the retaining plate.

[0010] The drainage holes can drain the seepage water from the roadbed.

[0011] The bearing plate has a second expansion joint; the second expansion joint is located on the side of the bearing plate.

[0012] The second expansion joint can prevent the load-bearing plate from undergoing severe deformation and cracking due to temperature differences and concrete shrinkage.

[0013] The soil-bearing component also includes a filter layer; the filter layer is fixedly connected to the retaining plate and is located on the side of the retaining plate away from the two long piles.

[0014] The filter layer is laid with bagged sand and gravel material to ensure that the seepage water in the roadbed can be discharged smoothly from the drainage holes without being carried out of the soil, so as to achieve the effect of roadbed drainage and pressure reduction.

[0015] This invention discloses a three-row pile-slab wall structure for steep slope roadbeds. The long piles, the first short pile, and the second short pile are manually excavated, vertically penetrating the overburden and anchored into the bedrock. They are rigidly connected by the first and second crossbeams to form a single unit. Then, layered and compacted backfill is constructed above the bearing elements. The long piles, the first short piles, the second short piles, the first crossbeam, and the second crossbeam jointly bear the backfill and variable load pressure, reducing structural deformation and improving overall structural stability and shear resistance. The long piles serve as the main piles, primarily bearing the backfill and variable load horizontally. Furthermore, it bears vertical pressure; the soil pressure exerted on the long pile, the first short pile, and the second short pile is mainly in the vertical direction, increasing axial pressure, improving the stress on the long pile, the first short pile, and the second short pile, effectively controlling the structural deformation of the long pile, the first short pile, and the second short pile, reducing the size of the long pile, the first short pile, and the second short pile, and saving investment; through the above methods, the three-row pile-slab wall structure of the steep slope subgrade has the advantages of high rigidity, high stability, and simple structure, and the construction process is simple, the construction operability is strong, and it meets environmental protection requirements. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of a three-row pile-slab wall structure for steep slope roadbed according to the present invention;

[0018] Figure 2 This is another structural schematic diagram of a three-row pile-slab wall structure for steep slope roadbed according to the present invention;

[0019] Figure 3 This is a schematic diagram of a three-row pile-slab wall structure for steep slope roadbed without a filter layer, according to the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of a three-row pile-slab wall structure for steep slope roadbed after filling and backfilling according to the present invention;

[0021] Figure 5 This is a structural schematic diagram of the reinforcement component of the present invention.

[0022] 1-Soil bearing component, 2-Supporting component, 3-Reinforcing component, 4-Backfill, 11-Retaining plate, 12-Bearing plate, 13-Filter layer, 21-Second crossbeam, 22-Long pile, 23-First short pile, 24-Second short pile, 25-First crossbeam, 31-Reinforcing crossbeam, 32-Supporting column, 33-Supporting beam, 111-First expansion joint, 112-Drainage hole, 121-Second expansion joint, 311-Connecting column, 312-Locking component, 3121-First clamping block, 3122-Tightening bolt, 3123-Second clamping block. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of this invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, in the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Please see Figures 1-5 This invention provides a three-row pile-slab wall structure for steep slope roadbeds: the three-row pile-slab wall structure for steep slope roadbeds includes a soil-bearing component 1 and two supporting components 2; the two supporting components 2 are located on both sides of the soil-bearing component 1; each supporting component 2 includes a second crossbeam 21, a long pile 22, a first short pile 23, a second short pile 24, and a first crossbeam 25; the second crossbeam 21 is fixedly connected to the soil-bearing component 1 and is located below the soil-bearing component 1; the long pile 22 is fixedly connected to the second crossbeam 21 and is fixedly attached to the soil-bearing component 1. The first short pile 23 is fixedly connected to the second crossbeam 21 and located below the second crossbeam 21; the second short pile 24 is fixedly connected to the second crossbeam 21 and located on the side of the second crossbeam 21 away from the long pile 22; one end of the first crossbeam 25 is fixedly connected to the long pile 22, and the other end of the first crossbeam 25 away from the long pile 22 is fixedly connected to the first short pile 23 and located between the long pile 22 and the first short pile 23.

[0026] In this embodiment, the long pile 22, the first short pile 23, and the second short pile 24 are manually excavated, vertically penetrating the overburden and anchored into the bedrock. They are rigidly connected by the first crossbeam 25 and the second crossbeam 21 to form a whole. Then, backfill 4 is layered and compacted above the soil-bearing component 1. The long pile 22, the first short pile 23, the second short pile 24, the first crossbeam 25, and the second crossbeam 21 jointly bear the backfill 4 and the variable load pressure, reducing structural deformation and improving the overall structural stability and shear resistance. The long pile 22, as the main pile, mainly bears the backfill 4 and the horizontal variable load, and also bears the vertical pressure. The pressure of the backfill 4 on the long pile 22, the first short pile 23, and the second short pile 24 is mainly in the vertical direction, increasing the axial pressure, improving the stress on the long pile 22, the first short pile 23, and the second short pile 24, effectively controlling the structural deformation of the long pile 22, the first short pile 23, and the second short pile 24, and reducing the stress on the long pile 22. 22. The dimensions of the first short pile 23 and the second short pile 24 are optimized to save investment. Preferably, the long pile 22, the first short pile 23, and the second short pile 24 are cast-in-place with reinforced concrete formwork. The distance between the long pile 22 and the first short pile 23 should be 5m to 7m, and the distance between the first short pile 23 and the second short pile 24 should be 7m to 8m. The spacing of the long pile 22, the first short pile 23, and the second short pile 24 along the route should be 4m to 6m. The connection point of the first crossbeam 25 is selected at the cantilever section of the first short pile 23, preferably at the intersection of the first short pile 23 and the ground line. The first crossbeam 25 and the second crossbeam 21 are cast-in-place with reinforced concrete formwork. The height of the second crossbeam 21 can be adjusted according to the lateral slope of the steep slope to control the thickness of the upper fill. Through the above methods, the three-row pile-slab wall structure of the steep slope subgrade has the advantages of high rigidity, high stability, and simple structure. Moreover, the construction process is simple, the construction is highly operable, and it meets environmental protection requirements.

[0027] Furthermore, the soil-bearing component 1 includes a retaining plate 11 and a bearing plate 12; the retaining plate 11 is fixedly connected to two of the long piles 22 respectively, and is located on the side of the two long piles 22 near the second crossbeam 21; the bearing plate 12 is fixedly connected to the retaining plate 11, and is also fixedly connected to the second crossbeam 21, and is located above the second crossbeam 21; the retaining plate 11 has a first expansion joint 111; the first expansion joint 111 is located on the side of the retaining plate 11; the retaining plate 11 also has two drainage holes 112; the two drainage holes 112 are located on both sides of the retaining plate 11; the bearing plate 12 has a second expansion joint 121; the second expansion joint 121 is located on the side of the bearing plate 12; the soil-bearing component 1 also includes a filter layer 13; the filter layer 13 is fixedly connected to the retaining plate 11, and is located on the side of the retaining plate 11 away from the two long piles 22.

[0028] In this embodiment, the bearing plate 12 provides support for the backfill 4, and the retaining plate 11 blocks and limits the backfill 4. Preferably, the bearing plate 12 is made of reinforced concrete, either cast-in-place or precast, and the retaining plate 11 is also made of reinforced concrete, either cast-in-place or precast. The first expansion joint 111 prevents severe deformation and cracking of the retaining plate 11 due to temperature differences and concrete shrinkage. Preferably, the first expansion joint 111 has a width of 0.02~0.03m, and the joint is filled with flexible materials such as asphalt and polystyrene foam. The drainage hole 112 is filled with materials such as rubber; the second expansion joint 121 can drain the seepage water in the roadbed; the second expansion joint 121 can prevent the bearing plate 12 from undergoing severe deformation and cracking due to temperature difference and concrete shrinkage. Preferably, the second expansion joint 121 has a joint width of 0.02~0.03m and is filled with flexible materials such as asphalt, polystyrene foam, and rubber. The filter layer 13 is laid with bagged sand and gravel material to ensure that the seepage water in the roadbed can be smoothly discharged from the drainage hole 112 without carrying out the soil, so as to achieve the effect of roadbed drainage and pressure reduction.

[0029] Furthermore, the steep slope roadbed three-row pile-slab wall structure also includes a reinforcement component 3; the reinforcement component 3 includes a reinforcement beam 31, a support column 32, and a support beam 33; the reinforcement beam 31 is detachably connected to two first beams 25 respectively and is located between the two first beams 25; the support column 32 is fixedly connected to the reinforcement beam 31 and is located above the reinforcement beam 31; the support beam 33 is fixedly connected to the support column 32 and is located above the support column 32.

[0030] In this embodiment, the reinforcing beam 31 can connect the two first beams 25 and strengthen the tension between the two first beams 25. The support beam 33 and the support column 32 can provide support for the two second beams 21, further improving the overall stability.

[0031] Furthermore, the reinforcing beam 31 includes a connecting column 311 and two locking components 312; the connecting column 311 is fixedly connected to the supporting column 32 and is located on the side of the supporting column 32 away from the supporting beam 33; the two locking components 312 are located on both sides of the connecting column 311; the locking component 312 includes a first clamping block 3121, two tension bolts 3122 and a second clamping block 3123; the first clamping block 3121 is fixedly connected to the connecting column 311 and is located on the side of the connecting column 311; the two tension bolts 3122 are threadedly connected to the first clamping block 3121 respectively and are located on both sides of the first clamping block 3121; the second clamping block 3123 is threadedly connected to the two tension bolts 3122 respectively and is located between the two tension bolts 3122.

[0032] In this embodiment, by placing the first clamping block 3121 and the second clamping block 3123 on both sides of the first crossbeam 25, the first clamping block 3121 and the second clamping block 3123 can be connected by the two tensioning bolts 3122, and the first clamping block 3121 and the second clamping block 3123 can be tightened and fixed to the side of the first crossbeam 25, thereby fixing the connecting column 311. The positions of the first clamping block 3121 and the second clamping block 3123 on the first crossbeam 25 can be adjusted according to the actual situation, thereby changing the positions of the connecting column 311, the support column 32 and the support beam 33 to ensure the best reinforcement effect.

[0033] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A three-row pile-slab wall structure for steep slope roadbeds, characterized in that, The steep slope roadbed three-row pile-slab wall structure includes a soil-bearing component and two supporting components; the two supporting components are located on both sides of the soil-bearing component; each supporting component includes a second crossbeam, a long pile, a first short pile, a second short pile, and the first crossbeam; the second crossbeam is fixedly connected to the soil-bearing component and is located below the soil-bearing component; the long pile is fixedly connected to the second crossbeam and to the soil-bearing component, and is located on the side of the second crossbeam; the first short pile is fixedly connected to the second crossbeam and is located below the second crossbeam; the second short pile is fixedly connected to the second crossbeam and is located on the side of the second crossbeam away from the long pile; One end of the first crossbeam is fixedly connected to the long pile, and the end of the first crossbeam away from the long pile is fixedly connected to the first short pile, and is located between the long pile and the first short pile; The steep slope roadbed three-row pile-slab wall structure also includes a reinforcement component; the reinforcement component includes a reinforcement beam, a support column, and a support beam; the reinforcement beam is detachably connected to two of the first beams and is located between the two first beams; the support column is fixedly connected to the reinforcement beam and is located above the reinforcement beam; the support beam is fixedly connected to the support column and is located above the support column. The reinforcing beam includes a connecting column and two locking components; the connecting column and the supporting column are fixedly connected and located on the side of the supporting column away from the supporting beam; the two locking components are located on both sides of the connecting column; each locking component includes a first clamping block, two tension bolts, and a second clamping block; the first clamping block is fixedly connected to the connecting column and located on the side of the connecting column; the two tension bolts are threadedly connected to the first clamping block and located on both sides of the first clamping block; the second clamping block is threadedly connected to the two tension bolts and located between the two tension bolts.

2. The three-row pile-slab wall structure for steep slope roadbed as described in claim 1, characterized in that, The soil-bearing component includes a retaining plate and a bearing plate; the retaining plate is fixedly connected to two of the long piles respectively and is located on the side of the two long piles near the second crossbeam; the bearing plate is fixedly connected to the retaining plate and to the second crossbeam, and is located above the second crossbeam.

3. The three-row pile-slab wall structure for steep slope roadbed as described in claim 2, characterized in that, The retaining plate has a first expansion joint; the first expansion joint is located on the side of the retaining plate.

4. The three-row pile-slab wall structure for steep slope roadbed as described in claim 3, characterized in that, The retaining plate also has two drainage holes; the two drainage holes are located on both sides of the retaining plate.

5. A three-row pile-slab wall structure for steep slope roadbed as described in claim 4, characterized in that, The support plate has a second expansion joint; the second expansion joint is located on the side of the support plate.

6. A three-row pile-slab wall structure for steep slope roadbed as described in claim 5, characterized in that, The soil-bearing component also includes a filter layer; the filter layer is fixedly connected to the retaining plate and is located on the side of the retaining plate away from the two long piles.

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