A highway drainage structure

Abstract

This utility model provides a highway drainage structure, including buffer steps, drainage ditches, and water-retaining strips. At least one buffer step is set on the slope of the side of the highway. A water-retaining strip is provided at the top of the slope, and slope protection stones are laid between the water-retaining strip and the buffer steps, and between the drainage ditch and the buffer steps. The drainage ditch is lower than the pavement structure layer of the highway and is filled with gravel. An impermeable layer extending to the upper edge of the pavement structure layer is provided at the edge of the drainage ditch. A plain soil layer extending to the top of the drainage ditch is laid on top of the impermeable layer. A groove with an arc-shaped bottom is provided on the plain soil layer above the drainage ditch. Vegetation is planted on the surface of the plain soil layer. Through the combination of drainage ditches, drainage channels, drainage pipes, and impermeable layers, the drainage capacity of the highway can be effectively improved, the damage of water accumulation to the pavement and slope can be reduced, and the safety and stability of the highway can be enhanced.

Description

Technical Field

[0001] This utility model belongs to the technical field of highway drainage, and specifically relates to a highway drainage structure. Background Technology

[0002] Drainage is crucial during the construction and use of highways. Traditional highway drainage structures often have many shortcomings. Especially for highways near slopes, soil erosion or rockfalls can easily cause water and gravel to accumulate or silt up in the drainage ditches, requiring timely cleaning. Otherwise, rainwater drainage can be impeded, leading to rainwater seeping into the road structure and affecting the road surface's lifespan.

[0003] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and to provide a drainage structure for highways.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A highway drainage structure includes a buffer step, a drainage ditch, and a water-retaining strip, wherein at least one of the buffer steps is disposed on the slope of the side of the highway.

[0007] The drainage ditch is set along the side edge of the highway near the slope and extends along the direction of the highway. A water-blocking strip is set at the top of the slope. Slope protection stones are laid between the water-blocking strip and the buffer steps, and between the drainage ditch and the buffer steps.

[0008] The drainage ditch is lower than the road surface structure layer of the highway. The drainage ditch is filled with gravel. The edge of the drainage ditch is provided with an impermeable layer extending to the upper edge of the road surface structure layer. Above the impermeable layer is a plain soil layer extending to the top of the drainage ditch. The plain soil layer is provided with a groove with an arc-shaped bottom corresponding to the top of the drainage ditch. Vegetation is provided on the surface of the plain soil layer.

[0009] Preferably, the drainage ditch is provided with an anti-slip barrier on the side near the slope, and the anti-slip barrier is cast as a whole with the drainage ditch.

[0010] Preferably, the drainage ditch is filled with gravel, and a drainage pipe is laid at the bottom of the drainage ditch, with drainage holes distributed on the outer wall of the drainage pipe.

[0011] Preferably, there are at least two stepped platforms below the impermeable layer, and the impermeable layer is plain soil wrapped with an impermeable geomembrane.

[0012] Preferably, multiple drainage channels are provided on the slope at intervals, and a cast-in-place layer is poured at the location of the corresponding drainage channel on the slope.

[0013] The buffer steps and water-blocking strips are equipped with corresponding drainage grooves and drainage openings.

[0014] Preferably, the drainage ditch is provided with steps extending along the slope surface.

[0015] Preferably, the buffer step is cast as a single unit with the cast-in-place layer, and a low wall is provided on the outside of the buffer step. The low wall protrudes upward from the upper surface of the cast-in-place layer at the buffer step, and extends downward into the slope soil layer below.

[0016] Preferably, the slope is provided with multiple sets of seepage guiding mechanisms, each including multiple seepage pipes. One end of each seepage pipe is distributed in a fan shape within the slope, and the other end of each seepage pipe is concentrated at the drainage ditch, passing through the impermeable membrane and geogrid and extending to the drainage ditch.

[0017] Preferably, the slope is covered with an impermeable membrane and a geogrid.

[0018] Beneficial effects: The drainage structure of this utility model, through the combination of various drainage methods such as drainage ditches, drainage channels, drainage pipes and impermeable layers, can effectively improve the drainage capacity of highways, reduce the damage of water accumulation to road surfaces and slopes, enhance the safety and stability of highways, and at the same time have good anti-seepage and anti-skid properties, adapt to different geographical environments and climatic conditions, and reduce the damage of water accumulation to road surfaces and slopes. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0020] Figure 1 This is a schematic diagram of the drainage structure in a specific embodiment provided by this utility model;

[0021] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0022] In the diagram: 1. Slope; 2. Drainage channel; 3. Water barrier; 4. Low wall; 5. Buffer step; 6. Infiltration pipe; 7. Anti-slip threshold; 8. Drainage ditch; 9. Road structure layer; 10. Drainage pipe; 11. Plain soil layer; 12. Impermeable layer; 13. Protective pile. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art are within the protection scope of this utility model.

[0024] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected" and "linked" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0026] like Figure 1-2 As shown, a highway drainage structure can effectively improve the drainage capacity of the highway at slope 1. The specific drainage structure includes a buffer step 5, a drainage ditch 8, and a water-retaining strip 3. The buffer step 5 can buffer the water flow, reduce the scouring force of the water flow on slope 1, and also help guide the orderly flow of water. At least one buffer step 5 is set on the slope 1 on the side of the highway, and the specific selection is adapted according to the length of slope 1. The drainage ditch 8 is set on the side edge of the highway near slope 1 and extends along the direction of the highway. A water-retaining strip is set at the top of slope 1. The water-retaining strip is made of concrete and protrudes upward 20-30cm from the top surface of slope 1. Retaining stones are laid between the water-retaining strip and the buffer step 5, and between the drainage ditch 8 and the buffer step 5. The specific shape of the retaining stones is not limited. It is preferable to set multiple grouting anchors. The grouting anchors pass through the corresponding retaining stones and are fixed to the retaining stones by prestressed nuts. Grouting improves the landslide resistance of slope 1.

[0027] The drainage ditch 8 is lower than the pavement structure layer 9 of the highway, so that water on the highway and slope 1 can be drained quickly. The drainage ditch 8 is filled with gravel, and the edge of the drainage ditch 8 is provided with an impermeable layer 12 extending to the upper edge of the pavement structure layer 9. The impermeable layer 12 is used to protect the pavement structure layer 9, which can effectively prevent water from seeping into the pavement structure layer 9 and the soil of the slope 1, protect the stability of the pavement and slope 1, avoid road damage caused by drainage extending into the pavement structure layer 9, and extend the service life of the highway. Above the impermeable layer 12, a plain soil layer 11 extending above the drainage ditch 8 is laid. The upper surface of the plain soil layer 11 is at the same level as the road surface. A groove with an arc-shaped bottom is provided above the drainage ditch 8 corresponding to the plain soil layer 11. Vegetation is provided on the surface of the plain soil layer 11. The drainage structure provided in this application first guides and collects water through the groove and can quickly infiltrate into the drainage ditch 8. The drainage ditch 8 is filled with gravel. A drainage pipe 10 is laid at the bottom of the drainage ditch 8. Water is drained through the drainage pipe 10 at the bottom of the drainage ditch 8. The groove formed by the plain soil layer 11 can not only drain water but also serve as a crushing platform to buffer and collect gravel falling from the slope 1. Drainage holes are distributed on the outer wall of the drainage pipe 10. The diameter of the drainage holes is smaller than the gravel particle size. Geotextile is wrapped around the outside of the drainage pipe 10. Furthermore, geotextile is laid between the gravel and the plain soil layer 11 above the drainage ditch 8 to prevent water and soil from flowing into the ditch and improve drainage smoothness.

[0028] In this embodiment, a geomembrane and a geogrid are laid on the slope 1. The geomembrane can prevent water from seeping into the soil of the slope 1 and protect the stability of the soil of the slope 1. The geogrid can increase the strength and integrity of the soil of the slope 1 and improve the anti-sliding ability of the slope 1.

[0029] Protective piles 13 are installed at the edge of the road structure layer 9, and corrugated beam guardrails extending along the direction of the highway are installed on the protective piles 13.

[0030] In an optional embodiment, the drainage ditch 8 is provided with an anti-slip threshold 7 on the side near the slope 1. The upper edge of the anti-slip threshold 7 is provided with a slope corresponding to the slope protection stone, and it is cast into the drainage ditch 8. This can prevent the slope protection stone from sliding down due to water flow, and also increase the stability of the drainage ditch 8.

[0031] The impermeable layer 12 is plain soil wrapped with an impermeable geomembrane. There are no less than two stepped platforms below the impermeable layer 12 to ensure the stability of the impermeable layer 12 and avoid the slippage problem of the impermeable layer 12.

[0032] Multiple drainage channels 2 are provided on the slope 1 at intervals. Steps extending along the slope surface of the slope 1 are provided in the drainage channels 2. The steps can slow down the flow speed of water in the drainage channels 2 and reduce the scouring force of the water flow on the drainage channels 2.

[0033] A cast-in-place layer is poured at the location of the corresponding drainage ditch 2 on the slope 1 to improve the structural stability of the drainage ditch 2. Drainage gaps corresponding to the drainage ditch 2 are provided on the buffer step 5 and the water retaining strip 3.

[0034] In an optional embodiment, the buffer step 5 is integrally cast with the cast-in-place layer. A low wall 4 is provided on the outer side of the buffer step 5. The low wall 4 can block the water flowing down the slope 1, allowing the water to be collected and drained at the drainage channel 2. The upper part of the low wall 4 protrudes upward from the upper surface of the cast-in-place layer at the buffer step 5, and the lower part of the low wall 4 extends downward into the soil layer of the slope 1, thereby ensuring that the low wall 4 has sufficient stability on the buffer step 5. Moreover, the design of the low wall 4 increases the drainage structure and the stability of the slope 1, preventing water flow from eroding and damaging the slope 1, and ensuring the safety of vehicle traffic.

[0035] To ensure the stability of slope 1, multiple sets of seepage guiding mechanisms are installed within slope 1. These mechanisms are evenly distributed within slope 1 and include multiple seepage pipes 6. The seepage pipes 6 are PVC pipes with quincunx-shaped perforations on their outer walls and are covered with geotextile, allowing seepage water in slope 1 to flow out through the seepage pipes 6. The end of the seepage pipe 6 extending towards the drainage ditch 2 is the lowest end, thus forming a slope of no less than 5°. Among the multiple seepage pipes 6 in the same seepage guiding mechanism, one end of the seepage pipe 6 is distributed in a fan shape within slope 1, while the other end of the seepage pipe 6 converges at the drainage ditch 2 and extends through the impermeable membrane and geogrid to the drainage ditch 2, thereby concentrating the seepage water into the drainage ditch 2 for discharge.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be within the scope of protection of the pending claims of the present utility model.

Claims

1. A drainage structure for highways, characterized in that, It includes a buffer step, a drainage ditch and a water barrier, with at least one of the buffer steps located on the slope of the side of the highway; The drainage ditch is set along the side edge of the highway near the slope and extends along the direction of the highway. A water-blocking strip is set at the top of the slope. Slope protection stones are laid between the water-blocking strip and the buffer steps, and between the drainage ditch and the buffer steps. The drainage ditch is lower than the road surface structure layer of the highway. The drainage ditch is filled with gravel. The edge of the drainage ditch is provided with an impermeable layer extending to the upper edge of the road surface structure layer. Above the impermeable layer is a plain soil layer extending to the top of the drainage ditch. The plain soil layer is provided with a groove with an arc-shaped bottom corresponding to the top of the drainage ditch. Vegetation is provided on the surface of the plain soil layer.

2. The highway drainage structure according to claim 1, characterized in that, The drainage ditch is equipped with an anti-slip barrier on the side near the slope, and the anti-slip barrier is cast as a whole with the drainage ditch.

3. The highway drainage structure according to claim 1, characterized in that, The drainage ditch is filled with gravel, and a drainage pipe is laid at the bottom of the drainage ditch with drainage holes distributed on the outer wall of the drainage pipe.

4. The highway drainage structure according to claim 1, characterized in that, There are at least two stepped platforms below the impermeable layer, which is plain soil wrapped with an impermeable geomembrane.

5. The highway drainage structure according to claim 1, characterized in that, Multiple drainage channels are provided at intervals on the slope, and a cast-in-place layer is poured at the location of the corresponding drainage channel on the slope. The buffer steps and water-blocking strips are equipped with corresponding drainage grooves and drainage openings.

6. The highway drainage structure according to claim 5, characterized in that, The drainage ditch is equipped with steps that extend along the slope.

7. The highway drainage structure according to claim 5, characterized in that, The buffer step is cast as a whole with the cast-in-place layer. A low wall is provided on the outside of the buffer step. The low wall protrudes upward from the upper surface of the cast-in-place layer at the buffer step and extends downward into the slope soil layer.

8. The highway drainage structure according to claim 5, characterized in that, The slope is equipped with multiple sets of seepage guiding mechanisms, each including multiple seepage pipes. One end of each seepage pipe is distributed in a fan shape within the slope, while the other end of each seepage pipe converges at the drainage ditch and extends through the impermeable membrane and geogrid to the drainage ditch.

9. The highway drainage structure according to claim 1, characterized in that, The slope is covered with impermeable membrane and geogrid.

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