High-slope retaining wall of channel-side car bypass platform

Abstract

The utility model discloses a high side slope retaining wall of channel side error parking platform, include: retaining wall, drain pipe, expand the heel, tooth wall, concrete cushion layer, drainage tank and reinforcing mesh, and retaining wall is located error parking platform towards one side of two -level side slope, drain pipe is set through retaining wall, expand the heel is located retaining wall lower part far away from one side of side slope, tooth wall is located expand the heel far away from the bottom of retaining wall one end, and concrete cushion layer is located retaining wall, expand the heel and the bottom of tooth wall. The utility model discloses a combination design of " retaining wall + expand the heel + anti -slip tooth wall", reduces the section size simultaneously, utilizes base extension and tooth wall structure to improve anti -overturning and anti -slip stability significantly, compared with traditional big section retaining wall, and the concrete consumption reduces about 30%, and material cost and construction energy consumption are reduced, and the foundation excavation amount is reduced simultaneously, and the disturbance to surrounding side slope and structure is reduced, is applicable to high side slope, adjacent bridge pier column complex environment of space limited.

Description

Technical Field

[0001] This utility model belongs to the field of retaining wall technology, specifically relating to a high slope retaining wall for a canal-side passing platform. Background Technology

[0002] In large-scale, long-distance water diversion and transportation projects in China, the design and construction of retaining walls on high slopes are crucial for ensuring slope stability and road safety. Retaining walls along passing platforms must have a reasonable structure and be adapted to local conditions to avoid problems such as increased foundation excavation cross-section affecting slope stability, increased earthwork excavation and slope protection construction, and increased investment costs due to inappropriate selection of retaining wall type. While traditional gravity retaining walls have advantages such as simple construction and convenient installation, they also have some significant drawbacks. For example, they require a large amount of concrete, and taller retaining walls require large cross-section structures, leading to high material costs; construction disturbance is significant, as traditional full-section cast-in-place processes easily disturb surrounding slopes, bridge piers, and operating roads, increasing construction risks; and the retaining wall structure and construction occupy a large space, which is unfavorable for construction in space-constrained areas. In existing technologies, how to improve the stability of retaining walls while reducing structural cross-sectional dimensions and lowering material consumption and construction costs is a pressing technical challenge in this field.

[0003] In existing technologies, some projects have attempted to address the aforementioned issues by employing prefabricated retaining walls or localized reinforcement measures. For example, precast concrete components can reduce the amount of on-site pouring, or a locally enlarged foundation can be added to the base of the retaining wall to enhance its anti-overturning capacity. However, such solutions still have limitations: prefabricated structures require additional connectors and construction equipment, resulting in higher costs and poorer overall integrity; localized reinforcement measures (such as a single enlarged foundation) offer limited improvement in overall anti-sliding performance and cannot meet the stability requirements of high slopes; and the construction process still involves disturbance to the surrounding soil, making it difficult to adapt to sensitive environments such as adjacent bridge piers.

[0004] The above-mentioned technical solutions have failed to adequately resolve the contradiction between reducing cross-sectional dimensions, improving stability, and reducing construction disturbance, and an innovative structural design and construction method is urgently needed. Utility Model Content

[0005] To address the aforementioned problems, embodiments of this utility model propose a high slope retaining wall for a channel-side vehicle platform.

[0006] The high slope retaining wall of the channel-side passing platform of this utility model includes: a retaining wall located on the side of the passing platform facing the secondary slope, with backfill between the retaining wall and the secondary slope; a drainage pipe penetrating the retaining wall; an enlarged rear toe located at the lower part of the retaining wall away from the slope; a toothed wall located at the bottom of the enlarged rear toe away from the retaining wall; a concrete cushion layer located at the bottom of the retaining wall, the enlarged rear toe, and the toothed wall; a drainage ditch located at the top of the retaining wall near the secondary slope; and a steel mesh installed inside the retaining wall, the enlarged rear toe, and the toothed wall.

[0007] The passing platform is located between the primary and secondary slopes of the channel, and is situated on the upper surface of the enlarged rear toe.

[0008] There are multiple drainage pipes, which are inclinedly installed inside the retaining wall. One end of each drainage pipe is a free end with its opening facing downwards on the outside of the retaining wall. The other end of each drainage pipe is connected to a geotextile bag containing gravel, which is located in the backfill behind the wall.

[0009] The drainage pipes are made of Ф75mm PVC pipes. The free end of the drainage pipes slopes downwards at a rate of 5%. Multiple drainage pipes are spaced 6m apart and arranged in a quincunx pattern. The lowest drainage pipe should be at least 200mm above the ground.

[0010] The retaining wall has a trapezoidal structure with a top width of 300mm, a bottom width of 800mm, a height of 2350mm, and extends 300mm into the soil foundation. The height of the retaining wall is level with the slope surface of the secondary slope.

[0011] The enlarged hind toe has a length of 1500mm and a thickness of 200mm.

[0012] The toothed wall has a bottom width of 300mm, a top width of 400mm, and a height of 300mm.

[0013] The thickness of the concrete cushion layer is 50 mm.

[0014] A drainage ditch is provided at the junction of the existing primary horse trail and the enlarged rear toe away from the retaining wall, and the surface of the drainage ditch is covered with a ductile iron grate cover.

[0015] The retaining wall uses a double-layer steel mesh.

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

[0017] 1. This utility model, through the combined design of "conventional retaining wall + enlarged rear toe + anti-sliding toothed wall", reduces the cross-sectional size while significantly improving the anti-overturning and anti-sliding stability (anti-overturning stability coefficient > 1.6, anti-sliding stability coefficient > 1.3) by utilizing the base extension and toothed wall structure, far exceeding the traditional trapezoidal structure (which relies solely on its own weight for anti-sliding and anti-overturning), meeting the safety requirements of high slope working conditions and effectively reducing the risk of overturning and sliding.

[0018] 2. Compared with traditional large-section gravity retaining walls, the amount of concrete used is reduced by about 30%, which reduces material costs and construction energy consumption. At the same time, it reduces the amount of foundation excavation, earthwork transportation and slope protection work, further achieving cost reduction and efficiency improvement. The optimized cross-section design reduces the excavation range, and with the combination of manual finishing and segmented construction technology, it reduces the disturbance to the surrounding slopes, bridge piers and running roads. It is especially suitable for sensitive scenarios such as high slopes and adjacent structures, ensuring the safety of the surrounding structures during construction.

[0019] 3. The optimized configuration of double-layer steel mesh and foundation steel reinforcement enhances the overall structural integrity and reduces the risk of cracking.

[0020] 4. The design of wrapping the base of the drainage pipe with 400g / m² geotextile and filling it with crushed stone can prevent the filter layer from clogging and improve the durability of the structure. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the high slope retaining wall of the channel bypass vehicle platform of this utility model.

[0022] Figure 2 This is a schematic diagram of the internal steel mesh structure of the retaining wall of this utility model.

[0023] Figure 3 This is a structural schematic diagram of the drainage pipe of this utility model.

[0024] Figure 4 This is a cross-sectional view of the channel according to an embodiment of the present invention.

[0025] Figure label:

[0026] 1. Retaining wall; 2. Enlarged rear toe; 3. Toothed wall; 4. Concrete cushion layer; 5. Backfill behind the wall; 6. Drainage pipe; 7. Drainage trough; 8. Drainage ditch; 9. Ductile iron grate cover; 10. Primary bridle walkway; 11. Passing platform; 12. Primary slope; 13. Secondary slope. Detailed Implementation

[0027] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. 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.

[0028] like Figures 1-4 As shown, the high slope retaining wall of the channel passing platform of this utility model includes: retaining wall 1, drainage pipe 6, enlarged rear toe 2, toothed wall 3, concrete cushion layer 4, drainage ditch 7 and steel mesh. The retaining wall 1 is located on the side of the passing platform 11 facing the secondary slope 13, and there is backfill soil 5 between the retaining wall 1 and the secondary slope 13.

[0029] like Figure 4 As shown, the passing platform 11 is located between the primary slope 12 and the secondary slope 13 of the channel, and the passing platform 11 is located on the upper surface of the enlarged rear toe 2. That is, the upper surface of the enlarged rear toe 2 and the primary bridle path 10 together form the passing platform 11.

[0030] The retaining wall 1 is made of C20 reinforced concrete and has an overall trapezoidal structure. The top width is 300mm, the bottom width is 800mm, the height is 2350mm, and it extends 300mm into the soil foundation. The height of the retaining wall 1 is level with the slope height of the secondary slope 13 (flood control dike).

[0031] Drainage pipe 6 is installed through retaining wall 1; there are multiple drainage pipes 6, which are installed at an angle inside retaining wall 1, and one end of drainage pipe 6 is a free end with the opening facing downward on the outside of retaining wall 1. The other end of drainage pipe 6 is connected to a geotextile bag wrapped with gravel, and the geotextile bag is located in the backfill 5 behind the wall.

[0032] Drainage pipe 6 is made of Ф75mm PVC pipe. The free end of drainage pipe 6 has a downward slope of 5%. Multiple drainage pipes 6 are spaced 6m apart and arranged in a quincunx pattern. The lowest drainage pipe 6 should be at least 200mm above the ground.

[0033] The enlarged rear toe 2 is located on the lower part of the retaining wall 1, away from the secondary slope 13; the enlarged rear toe 2 is 1500mm long and 200mm thick. The function of the enlarged rear toe 2 is to increase the base area of ​​the retaining wall to improve its resistance to overturning and sliding.

[0034] The toothed wall 3 is located at the bottom of the end of the enlarged rear toe 2 furthest from the retaining wall 1, i.e., 1500mm away from the retaining wall; the toothed wall 3 has a bottom width of 300mm, a top width of 400mm, and a height of 300mm. The function of the toothed wall 3 is to enhance the anti-slip stability.

[0035] The concrete cushion layer 4 is located at the bottom of the retaining wall 1, the enlarged toe 2, and the toothed wall 3; the thickness of the concrete cushion layer 4 is 50mm. The cushion layer is a C20 concrete cushion layer, a single, one-time cast plain concrete layer. The functions of setting up the concrete cushion layer 4 at the bottom include: 1. Providing a flat and solid construction surface for the retaining wall construction. 2. The cushion layer acts as a "transition layer." Its rigidity is greater than that of the subgrade, enabling it to more evenly distribute the concentrated load from the enlarged toe and toothed wall onto a larger area of ​​the foundation soil, thereby reducing the unit area pressure (contact stress) borne by the foundation soil and preventing localized damage and excessive settlement. 3. The concrete cushion layer can effectively seal and protect the underlying foundation soil, preventing it from being disturbed, soaked, or softened, thus maintaining its original bearing capacity.

[0036] Drainage channel 7 is located on the top of retaining wall 1, near the secondary slope 13. The function of drainage channel 7 is to prevent surface water from seeping into the wall and causing water accumulation behind the wall, thereby preventing the wall from being subjected to water pressure.

[0037] Retaining wall 1, enlarged toe 2, and toothed wall 3 are all equipped with steel mesh. The steel mesh in retaining wall 1 is a double-layer steel mesh. The double-layer steel mesh includes longitudinal bars (16mm in diameter, with the inner longitudinal bars bent outward at the top and inward at the bottom, and the outer longitudinal bars bent inward at the top and outward at the bottom) and horizontal bars. The minimum inner diameter of the longitudinal bars is 7d.

[0038] The steel mesh inside the enlarged rear toe 2 and toothed wall 3 includes the top bottom steel bars (with the inner end bent downward), the bottom bottom steel bars (with the inner end bent upward), and longitudinal bars, which together form the transverse bars arranged along the edge of the bottom strip foundation section, improving the overall integrity of the foundation and enhancing the crack resistance and overall stiffness of the structure.

[0039] A drainage ditch 8 is provided at the junction of the existing primary horse trail 10 and the enlarged rear toe 2 on the side away from the retaining wall 1. The surface of the drainage ditch 8 is covered with a ductile iron grate cover 9. The drainage ditch is 300mm deep, 300mm wide, and 10cm thick, and is made of C20 cast-in-place concrete.

[0040] The specific implementation process of the high slope retaining wall of the channel bypass vehicle platform of this utility model is as follows:

[0041] Step 1, Base surface cleaning: Determine the cleaning area according to the drawings of passing platform 11. The width does not include the thickness of the retaining wall. Mark the area with lime, remove the original slope protection, and clean up the debris on the base surface.

[0042] Step 2, Slope Excavation: After confirming the width of the passing platform 11, excavation is carried out manually in conjunction with machinery, and the excavated material is transported away. During excavation, attention must be paid to the excavation dimensions; over-excavation and disturbance of other soil are strictly prohibited. Excess soil should be manually trimmed.

[0043] Step 3, Installation of cast iron grates for drainage ditches: At the boundary between the existing primary walkway 10 and the enlarged rear toe 2, a ductile iron grate cover 9 is added to the drainage ditch 8. The reference specifications are 400mm*600mm*40mm, and the load-bearing capacity is not less than 30t. ∠40mm*40mm*2.5mm limiting angle irons are installed on both sides of the drainage ditch, and expansion bolts are used to fix it firmly and stably. The cover plate is installed straight and flat, and there should be no misalignment on both sides of the drainage ditch.

[0044] Step 4, Formwork Support and Reinforcement Binding: After cleaning the base surface, install the reinforcement and formwork, using double-layer steel mesh with 16mm diameter reinforcement (HRB335 threaded steel) and 8mm diameter stirrups (HPB235 round steel). The sloping walls on both sides of retaining wall 1 rise smoothly from the toe of the drainage ditch slope, and the height of retaining wall 1 is flush with the slope surface.

[0045] Step 5, Retaining Wall and Platform Construction: After the formwork and reinforcement are installed, concrete is poured. To withstand the lateral pressure from the soil, the concrete retaining wall is designed in a trapezoidal shape, using C20 concrete. It extends 300mm into the soil foundation, and its height is flush with the original flood control dike slope. The top width of the concrete retaining wall is 300mm, and the bottom width is 800mm. Joints are spaced 6m apart, and each joint is filled with 2cm wide polyethylene closed-cell foam board, installed straight. Drainage pipes are installed at the junction of the retaining wall and the platform. These pipes are made of Ф75mm PVC pipe, spaced 6m apart in a staggered pattern, with a 5% outward slope. The pipes extend 0.2m into the soil, and the base is treated with 400g / m³ PVC. 2 The retaining wall is filled with crushed stone wrapped with geotextile. The lowest row of drainage holes should be at least 200mm above the ground, and the drainage holes should be straight and unobstructed. A drainage channel is installed at the top of the wall to prevent surface water from seeping down and causing water accumulation behind the wall, thus avoiding water pressure on the wall. The retaining wall is constructed with C20 concrete, 20cm thick, vibrated to ensure compaction, and joints cut with a width of 1cm and a depth not less than 2 / 3 of the road surface structure, with anti-slip grooves. After the concrete is poured, the surface should be smooth and aesthetically pleasing, and timely curing with cotton felt is required. The formwork can be removed after the concrete strength reaches 30%.

[0046] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A high slope retaining wall for a channel-side passing platform, characterized in that, include: A retaining wall is located on the side of the passing platform facing the secondary slope, and there is backfill between the retaining wall and the secondary slope; Drainage pipe, wherein the drainage pipe is installed through the retaining wall; An enlarged rear toe is located on the lower part of the retaining wall away from the slope. Tooth wall, the tooth wall being located at the bottom of the enlarged rear toe at the end furthest from the retaining wall; A concrete cushion layer located at the bottom of the retaining wall, the enlarged rear toe, and the toothed wall; A drainage ditch is located on the top of the retaining wall near the secondary slope. The retaining wall, the enlarged rear toe, and the toothed wall are all equipped with steel mesh.

2. The high slope retaining wall of the channel-side passing platform according to claim 1, characterized in that, The passing platform is located between the primary and secondary slopes of the channel, and consists of the existing primary horse track and the enlarged upper surface of the rear toe.

3. The high slope retaining wall of the channel-side passing platform according to claim 1, characterized in that, There are multiple drainage pipes, which are inclinedly installed inside the retaining wall. One end of each drainage pipe is a free end with its opening facing downwards on the outside of the retaining wall. The other end of each drainage pipe is connected to a geotextile bag containing gravel, which is located in the backfill behind the wall.

4. The high slope retaining wall of the channel-side passing platform according to claim 3, characterized in that, The drainage pipes are made of Ф75mm PVC pipes. The free end of the drainage pipes slopes downwards at a rate of 5%. Multiple drainage pipes are spaced 6m apart and arranged in a quincunx pattern. The lowest drainage pipe should be at least 200mm above the ground.

5. The high slope retaining wall of the channel-side passing platform according to claim 1, characterized in that, The retaining wall has a trapezoidal structure with a top width of 300mm, a bottom width of 800mm, a height of 2350mm, and extends 300mm into the soil foundation. The height of the retaining wall is level with the slope surface of the secondary slope.

6. The high slope retaining wall of the channel-side passing platform according to claim 1, characterized in that, The enlarged hind toe has a length of 1500mm and a thickness of 200mm.

7. The high slope retaining wall of the channel-side passing platform according to claim 1, characterized in that, The toothed wall has a bottom width of 300mm, a top width of 400mm, and a height of 300mm.

8. The high slope retaining wall of the channel-side passing platform according to claim 1, characterized in that, The thickness of the concrete cushion layer is 50mm.

9. The high slope retaining wall of the channel-side passing platform according to claim 2, characterized in that, A drainage ditch is provided at the junction of the existing primary horse trail and the enlarged rear toe away from the retaining wall, and the surface of the drainage ditch is covered with a ductile iron grate cover.

10. The high slope retaining wall of the channel-side passing platform according to claim 1, characterized in that, The retaining wall uses a double-layer steel mesh.

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