Slope retaining wall, pavement integrated drainage structure and construction method thereof

Abstract

The invention discloses a slope retaining wall and road surface integrated drainage structure and a construction method thereof, the slope retaining wall and road surface integrated drainage structure comprises a retaining wall and a road surface, one side of the road surface is tightly attached to the wall surface of the retaining wall, the elevation of the road surface is lower than the top surface of the retaining wall, and the side, tightly attached to the wall surface, of the road surface is provided with a permeable band in a full-length mode; a water collection tank; and a water collecting well and a water collecting space. The casing pipe is additionally arranged on the outer side of the reinforcement cage and in the pouring hole, the situation that the filling coefficient is too large due to the fact that concrete flows into the surrounding soil body in the pouring process is prevented, cost is saved, meanwhile, the outer threads are formed in the outer wall of the casing pipe, the friction force between the side wall of the pile body and the soil body after pile forming is improved, and the bearing capacity of a pile foundation is improved.

Description

Technical Field

[0001] The present invention relates to the field of building construction, and in particular to a slope retaining wall and road surface integrated drainage structure and a construction method thereof. Background Art

[0002] In retaining wall construction, both pavement drainage and slope drainage are critical links in ensuring slope stability and the normal use of roads. Currently, traditional construction methods often separate these two approaches, with each being designed and constructed independently. This approach, due to a lack of overall planning, results in poor synergy between the pavement drainage system and the retaining wall drainage system, preventing the formation of an effective integrated drainage structure. For example, the relative independence of the pavement drainage system from the retaining wall drainage system may cause water from the pavement drainage system to seep into the slope, increasing the soil moisture content, reducing soil strength, and affecting the stability of the retaining wall. Furthermore, if the retaining wall drainage system cannot be properly connected with the pavement drainage system, it will be difficult to fully utilize its drainage function, further exacerbating the risk of retaining wall instability. Summary of the Invention

[0003] The present invention provides a slope retaining wall and road surface integrated drainage structure, which combines the road surface drainage structure with the retaining wall drainage structure to prevent water in the road surface drainage structure from flowing into the slope and affecting the stability of the slope and the retaining wall.

[0004] The present invention provides an integrated drainage structure of a slope retaining wall and a road surface, comprising: a retaining wall, wherein a side of the retaining wall away from the slope is a wall surface; a road surface, wherein one side of the road surface is closely attached to the wall surface of the retaining wall and has an elevation lower than the top surface of the retaining wall, and a permeable strip is provided on the side of the road surface closely attached to the wall surface; a water collection trough is provided on the top surface of the retaining wall along the length direction of the retaining wall; a plurality of water collection wells are provided below the water collection trough at intervals along the length direction of the water collection trough and are connected to the water collection trough; a water collection space is provided inside the retaining wall and below the water collection wells, the water collection space is connected to the plurality of water collection wells, the side of the water collection space close to the wall surface extends to the edge of the wall surface and is connected to the permeable strip, and the height range of the water collection space and the height range of the permeable strip at least partially overlap, so that water in the permeable strip can flow into the water collection space, and a drainage outlet connected to the water collection space is provided on the retaining wall.

[0005] A further improvement of the present invention is that filter screens are fixed to the tops of the water collection trough and the water collection well, as well as to the bottom elevation of the water collection space located at the permeable belt.

[0006] A further improvement of the present invention is that a plurality of drainage holes are provided on one side of the retaining wall for discharging water in an area other than the water collecting trough, the water collecting space and the water collecting well, and the drainage holes avoid the water collecting trough, the water collecting space and the water collecting well.

[0007] A further improvement of the present invention is that the water collection space includes multiple water collection space units, each water collection well is connected to a water collection space unit below, a connecting pipe is connected between two adjacent water collection space units, and any outermost water collection space unit is connected to the drain outlet.

[0008] The present invention provides a construction method for a slope retaining wall and a road surface integrated drainage structure, comprising the following steps:

[0009] S1. Construct retaining wall foundation at the foot of the slope;

[0010] S2. Tie steel bars on the retaining wall foundation, set up formwork, and cast concrete to form the retaining wall, and form the water collection well, water collection space, water collection trough, and drainage outlet in the retaining wall;

[0011] S3. Construct the road surface, construct a permeable strip on the side of the road surface close to the retaining wall, and connect the permeable strip with the water collection space.

[0012] A further improvement of the present invention is that, when constructing the retaining wall foundation, an anti-slip base trench is opened, and when constructing the retaining wall, an anti-slip tenon that is compatible with the anti-slip base trench is formed at the bottom of the retaining wall, and before executing step S3, the anti-slip tenon is inserted into the anti-slip base trench.

[0013] A further improvement of the present invention is that, when constructing the road surface, permeable concrete is poured on the side of the road surface close to the retaining wall to form the permeable strip.

[0014] A further improvement of the present invention is that the retaining wall is poured in two times. The first pouring is to the elevation of the bottom of the water collection space, and the second pouring is to the remaining part above.

[0015] A further improvement of the present invention is that after the retaining wall is formed, a side of the retaining wall close to the side slope forms a facing surface, and gravel or crushed stone is filled between the facing surface of the retaining wall and the side slope.

[0016] The present invention provides an integrated drainage structure for a slope retaining wall and a road surface. A permeable strip is provided on the road surface to form a road surface drainage structure. The drainage structure is combined with the retaining wall drainage structure to prevent water in the road surface drainage structure from flowing into the slope and affecting the stability of the slope and the retaining wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional schematic diagram of the present invention;

[0018] In the figure: 1. Retaining wall foundation; 2. Anti-slip tenon; 3. Connecting pipe; 4. Water collection space; 5. Retaining wall; 51. Soil surface; 52. Wall surface; 6. Permeable belt; 7. Water collection space filter; 8. Drain hole; 9. Water collection well; 10. Water collection trough; 11. Water collection trough filter; 12. Block; 13. Water collection well filter; 14. Road surface. DETAILED DESCRIPTION

[0019] The present invention provides a slope retaining wall and road surface integrated drainage structure, such as Figure 1 As shown, it includes: a retaining wall 5, the side of the retaining wall 5 away from the slope is a wall surface 52; a road surface 14, one side of the road surface 14 is closely attached to the wall surface 52 of the retaining wall 5 and is lower than the top surface of the retaining wall 5, and a permeable belt is provided on one side of the road surface 14 close to the wall surface; a water collection tank 10 is opened on the top surface of the retaining wall along the length direction of the retaining wall; a plurality of water collection wells 9, a plurality of water collection wells 9 are opened at intervals below the water collection tank 10 along the length direction of the water collection tank 10. And it is connected to the water collection trough 10; the water collection space is opened inside the retaining wall 5 and is located below the water collection well 9. The water collection space 4 is connected to multiple water collection wells 9. The side of the water collection space 4 close to the wall 52 extends to the edge of the wall 52 and is connected to the permeable belt 6, and the height range of the water collection space 4 and the height range of the permeable belt 6 at least partially overlap, so that the water in the permeable belt 6 can flow into the water collection space 4. A drainage outlet connected to the water collection space 4 is opened on the retaining wall 5.

[0020] like Figure 1 As shown, in this embodiment, the permeable belt 6 is formed with a slope. As the distance between the permeable belt 6 and the wall 52 gradually shortens, its height also gradually becomes lower to form a slope. By forming the slope, the water on the road surface 14 can flow into the water collection space 4 along the slope due to gravity after flowing into the permeable belt 6.

[0021] Preferably, in this embodiment, a water pipe is provided in the water collection well 4 and is arranged along the direction of the water collection well 4 to better guide the water in the water collection tank 10 into the water collection well 9.

[0022] Preferably, in this embodiment, a water collection well 9 is provided every 30 m along the length of the water collection trough 10. The width of the water collection space 4 is the width of the water collection well 9 + 20 cm, and the bottom depth of the water collection space 4 is 20 to 30 cm lower than the bottom of the water collection well 9.

[0023] like Figure 1As shown, in this embodiment, a block 12 is further provided on the top of the retaining wall 5 close to the wall surface. By providing the block 12, soil blocks, garbage, etc. on part of the slope can be prevented from affecting the road surface 14.

[0024] like Figure 1 As shown, in this embodiment, a bell mouth is further opened on the retaining wall surface 5 , and the bell mouth is connected to the water collection space 4 to further enhance the efficiency of rainwater on the road surface 14 flowing into the water collection space 4 .

[0025] like Figure 1 As shown, filter screens are fixed on the top of the water collection tank 10 and the water collection well 9, as well as the bottom elevation of the water collection space 4 located at the permeable zone 6.

[0026] In this example, if Figure 1 As shown, the filter screen at the top of the sump 10 is the sump filter screen 11, the filter screen at the top of the water collection space 4 is the water collection space filter screen 7, and the filter screen at the top of the water collection well 9 is the water collection well filter screen 13. By setting the filter screens, garbage or dust can be prevented from entering to block the drainage system.

[0027] like Figure 1 As shown, a plurality of drainage holes 8 are provided on one side of the wall surface 52 of the retaining wall 5 for draining water from areas other than the water collecting trough 10, the water collecting space 4 and the water collecting well 9. By providing the drainage holes 8, rainwater that has seeped into the retaining wall 5 can be discharged from the drainage holes 8.

[0028] Preferably, a filter layer is set at the position of the drain hole 8 as required to prevent the drain hole 8 from clogging.

[0029] Preferably, in this embodiment, the distance between adjacent drainage holes 8 is 2 to 3 meters, and they are staggered up and down and left and right.

[0030] like Figure 1 As shown, the water collection space 4 includes multiple water collection space units. Each water collection well 9 is connected to a water collection space unit below. A connecting pipe 3 is connected between two adjacent water collection space units, and the outermost water collection space unit is connected to the drain outlet. Preferably, the drain pipe and connecting pipe 3 in this example are both HDPE double-wall corrugated pipes with a diameter of not less than 160 mm.

[0031] Preferably, in this embodiment, the arrangement of multiple connecting pipes 3 and drainage pipes together forms a slope from high to low, so that the water in the water collection space 4 flows along the slope to the water collection space outside, and finally flows out from the drainage outlet located at the lowest point of the slope. Preferably, the slope should be controlled at 0.2% to 0.5%.

[0032] Preferably, in this embodiment, the water-permeable belt 6 is 300 cm wide and 200 cm thick.

[0033] The present embodiment provides a construction method for a slope retaining wall and road surface integrated drainage structure, comprising the following steps:

[0034] S1. Construct retaining wall foundation 1 at the foot of the slope;

[0035] S2. Tie steel bars on the retaining wall foundation 1, set up formwork and cast the retaining wall 5 to form a water collection well 9, a water collection space 4, a water collection trough 10 and a drain outlet;

[0036] S3, constructing the road surface 6, constructing a permeable strip on the side of the road surface 6 close to the retaining wall 5, and connecting the permeable strip 6 with the water collection space 4.

[0037] In this embodiment, when constructing the retaining wall foundation 1, an anti-slip base trench is opened, and when constructing the retaining wall, an anti-slip tenon 2 that is compatible with the anti-slip base trench is fixed to the bottom of the retaining wall, and before executing step S3, the anti-slip tenon 2 is inserted into the anti-slip base trench. By setting the anti-slip tenon 2, the stability of the retaining wall structure is further enhanced.

[0038] In this embodiment, when the road surface 14 is constructed, permeable concrete is poured on the side of the road surface 14 close to the retaining wall 5 to form a permeable strip 6 .

[0039] In this embodiment, the retaining wall 5 is poured in two times. The first pouring is to the elevation of the bottom of the water collection space 4, and the second pouring is to the remaining part above.

[0040] In this embodiment, after the retaining wall 5 is formed, the retaining wall 5 forms a soil-facing surface 51 close to the slope. Sand, gravel or crushed stone is filled between the soil-facing surface 51 and the slope to fill the gap between the retaining wall 5 and the slope soil. Before filling, the concrete strength of the retaining wall 5 must be ensured to be above 90%. Small compacting equipment should be used for layered compaction to ensure the safety of the structure and the wall back compaction requirements.

[0041] In this embodiment, before constructing the retaining wall foundation 1, pre-construction preparations are required, specifically including: layered excavation and trimming of the slope above the retaining wall 5 according to the design plan; during the excavation process, a temporary drainage system is simultaneously set up, including temporary slope intercepting ditches, drainage ditches, and temporary water collection wells, to provide a safe and stable working space for the construction of the retaining wall 5. Through sufficient pre-construction preparations, the disturbance to the slope soil is minimized, the original structure and stress balance of the soil are protected, and the risk of disasters such as slope instability and landslides is reduced.

[0042] Preferably, in this embodiment, when casting the retaining wall 5, C30 concrete is used, and a 2 cm wide expansion joint is set every 10 m. The inner, outer and top sides of the joint are filled with asphalt wood boards with a depth of not less than 0.2 m.

[0043] In this embodiment, after the construction of the pavement 14 is completed, an overall inspection and acceptance is required. A comprehensive inspection is conducted on the retaining wall 5, the pavement drainage system, and the retaining wall drainage system. Ultrasonic testing and other technical means are used to detect the integrity, strength, and stability of the retaining wall structure, and to check whether there are cracks or voids in the retaining wall 5. A water flow test is conducted on the pavement drainage system and the retaining wall drainage system to check whether the drainage is smooth and whether there are any leaks at the connections of the drainage facilities. The displacement and settlement of the slope toe are monitored to ensure that they are within the allowable range. After all test indicators meet the design and relevant specifications, the relevant units are organized to conduct project acceptance.

[0044] The beneficial effects of the present invention are embodied in:

[0045] 1. Significantly improve construction efficiency: By integrating the design and simultaneous construction of retaining walls, road drainage, and slope drainage, the waiting time and repeated work between construction links are reduced, the construction process is optimized, and compared with the traditional step-by-step construction method, the construction period can be shortened by 30%, effectively reducing construction costs and improving project construction efficiency.

[0046] 2. Enhanced system synergy: The integrated design seamlessly integrates the retaining wall, pavement drainage system, and slope drainage system, enabling them to work together. The pavement drainage system promptly removes rainwater from the road surface, preventing it from seeping into the slope or retaining wall. The slope drainage system effectively reduces soil moisture and alleviates slope pressure. The retaining wall provides a stable foundation for the drainage system. Together, these three elements form a complete and efficient slope protection and drainage system, significantly improving overall slope stability and drainage effectiveness.

[0047] 3. Reduce soil disturbance and risks: By adopting measures such as layered and segmented excavation and temporary protective drainage, the disturbance of the slope soil is minimized during the construction process, the original structure and stress balance of the soil are protected, and the risks of disasters such as slope instability and landslides are reduced.

[0048] 4. Improve project quality and durability: Reasonable structural design and complete protection and drainage measures have improved the durability and reliability of the project, extended the service life of roads and slope projects, and reduced subsequent maintenance costs.

[0049] 5. Optimize drainage effect; a water collection trough 10 and a filter are set on the top of the support structure. The filter can effectively intercept slope garbage to avoid clogging the water collection trough 10. The water collection trough 10 and the water collection well 9 can efficiently drain rainwater. The block 12 set on the top can effectively intercept slope soil, garbage, rainwater, etc. from flowing directly into the road surface 14, reducing interference and pollution to the road surface 14. A filter is set above the water collection space 4 to effectively intercept road garbage and filter the incoming rainwater.

[0050] 6. Improve space utilization; the rainwater main pipeline and rainwater collection wells are arranged in the plane space of the support structure. The road surface 14 is equipped with 6 permeable strips + 4 water collection spaces with bell mouths + the top of the inspection well is slightly lower than the road surface elevation. Various combinations can quickly and effectively collect and discharge road surface rainwater. This approach can not only effectively drain water, but also eliminate the need to build road drainage ditches, thereby improving the utilization rate of land plane space, especially in areas with limited space.

[0051] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A slope retaining wall and road surface integrated drainage structure, characterized in that: include: A retaining wall, wherein the side of the retaining wall away from the slope is a wall surface; a road surface, wherein one side of the road surface is closely attached to the wall surface of the retaining wall and has an elevation lower than the top surface of the retaining wall, and a permeable strip is provided on one side of the road surface closely attached to the wall surface; a water collection trough is provided on the top surface of the retaining wall along the length direction of the retaining wall; a plurality of water collection wells, wherein the plurality of water collection wells are provided below the water collection trough at intervals along the length direction of the water collection trough and are connected to the water collection trough; a water collection space is provided inside the retaining wall and below the water collection wells, the water collection space is connected to the plurality of water collection wells, the water collection space extends to the edge of the wall surface on one side close to the wall surface and is connected to the permeable strip, and the height range of the water collection space and the height range of the permeable strip at least partially overlap, so that water in the permeable strip can flow into the water collection space, and a drainage outlet connected to the water collection space is provided on the retaining wall.

2. The slope retaining wall and road surface integrated drainage structure according to claim 1, characterized in that: Filters are fixed on the tops of the water collection trough and the water collection well, as well as on the bottom elevation of the water collection space located at the permeable belt.

3. The slope retaining wall and road surface integrated drainage structure according to claim 1, characterized in that: A plurality of drainage holes for draining water from areas other than the water collecting trough, the water collecting space and the water collecting well are provided on one side of the retaining wall, and the drainage holes avoid the water collecting trough, the water collecting space and the water collecting well.

4. The slope retaining wall and road surface integrated drainage structure according to claim 1, characterized in that: The water collection space includes multiple water collection space units, each water collection well is connected to a water collection space unit below, two adjacent water collection space units are connected by a connecting pipe, and any outermost water collection space unit is connected to the drain outlet.

5. A construction method of the slope retaining wall and road surface integrated drainage structure according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Construct retaining wall foundation at the foot of the slope; S2. Tie steel bars on the retaining wall foundation, set up formwork, and cast concrete to form the retaining wall, and form the water collection well, water collection space, water collection trough, and drainage outlet in the retaining wall; S3. Constructing a road surface, constructing a permeable strip on the side of the road surface close to the retaining wall, and connecting the permeable strip with the water collection space.

6. The construction method of the slope retaining wall and road surface integrated drainage structure according to claim 5, characterized in that: When constructing the retaining wall foundation, an anti-slip base trench is opened, and when constructing the retaining wall, an anti-slip tenon that is compatible with the anti-slip base trench is formed at the bottom of the retaining wall. Before executing step S3, the anti-slip tenon is inserted into the anti-slip base trench.

7. The construction method of the slope retaining wall and road surface integrated drainage structure according to claim 5, characterized in that: When constructing the road surface, permeable concrete is poured on the side of the road surface close to the retaining wall to form the permeable strip.

8. The construction method of the slope retaining wall and road surface integrated drainage structure according to claim 5, characterized in that: The retaining wall is poured in two steps. The first step is to pour the retaining wall to the elevation of the bottom of the water collection space, and the second step is to pour the remaining portion above the retaining wall.

9. The construction method of the slope retaining wall and road surface integrated drainage structure according to claim 5, characterized in that: After the retaining wall is formed, a side of the retaining wall close to the side slope forms a soil facing surface, and gravel or crushed stone is filled between the soil facing surface and the side slope.

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