Concrete permeable road pavement structure for collapsible loess
By adopting a combination design of concrete leveling layer, drainage pipe network, gravel layer, coarse sand layer, permeable brick layer and drainage tank in the permeable road paving structure in the trapped loess area, the problems of insufficient water permeability and high engineering cost in the existing technology are solved, and efficient water treatment and structural stability are achieved.
Patent Information
- Application Number
- CN202421144987.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-05-23
AI Technical Summary
In the high-cold, wet and sinking loess areas, the existing permeable road paving structure has the problem of high cost of waterproof coils, difficult to degrade and poor environmental benefits. The cost of plain concrete and ash soil water barrier is also high. In the event of heavy precipitation, water is prone to stay on the road surface, which is not conducive to passage.
A concrete permeable road paving structure of wet loess land is adopted, including laying a concrete leveling layer along the foundation pit, a drainage pipe network distributed vertically and crisscrossed vertically and crisscrossed, gravel layers, coarse sand layers, permeable brick layers and continuously distributed drainage tanks. Through the structural design of these layers, the permeability and permeability efficiency are improved, and the water accumulation treatment is facilitated by the installation of the groove cover.
It improves the load strength and structural stability of the permeable pavement, reduces the damage to the soil layer structure of the wet loess caused by the road area, improves the seepage efficiency of underground permeable roads, facilitates water accumulation treatment, reduces the project cost and improves environmental protection benefits.
Smart Images
Figure CN222575156U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of permeable road pavement structures, and in particular to a concrete permeable road pavement structure for collapsible loess. Background Art
[0002] Collapsible loess refers to soil that undergoes significant additional deformation due to structural damage after being soaked in water under the action of the self-weight stress of the overlying soil layer or the combined action of self-weight stress and additional stress. It is a soil with special properties. Its soil quality is relatively uniform and its structure is loose. When it is not soaked in water, it is generally strong and has low compressibility. When it is soaked in water under a certain pressure, the soil structure will be rapidly destroyed, resulting in large additional subsidence and rapid reduction in strength.
[0003] At present, in the high-altitude cold and collapsible loess area, the permeable pavement structure usually adopts a semi-permeable structure. A waterproof cushion layer is set on the top of the roadbed to prevent water in the upper permeable layer from seeping into the roadbed. The waterproof cushion layer is usually made of plain concrete, waterproof membrane or lime soil.
[0004] The inventors believe that the following defects exist: the cost of waterproof membrane projects is high, they are difficult to degrade after reaching the end of their service life, and the environmental benefits are poor; the cost of plain concrete and lime soil waterproof cushion projects is also high, and when there is heavy rainfall, water is easily retained on the road surface, which is not conducive to traffic, so there is room for improvement. Utility Model Content
[0005] In order to improve the water permeability of roads on loess soil and protect the soil structure of loess soil, the present application provides a concrete permeable road pavement structure for collapsible loess soil.
[0006] The present application provides a concrete permeable road pavement structure for collapsible loess soil, which adopts the following technical solution:
[0007] A concrete permeable road pavement structure for collapsible loess, wherein a foundation pit is excavated along the collapsible loess, the inner bottom surface of the foundation pit is paved with a concrete leveling layer, the upper end surface of the concrete leveling layer is paved with a drainage pipe network distributed in a criss-cross pattern, the upper surface of the drainage pipe network is provided with a plurality of groups of permeable holes, the upper end surface of the drainage pipe network is paved with a crushed stone layer, the crushed stone particles of the crushed stone layer are larger than the size of the permeable holes; the upper end surface of the crushed stone layer is evenly paved with a coarse sand layer, and the upper end surface of the coarse sand layer is paved with a permeable brick layer; the two side edges of the foundation pit are provided with a plurality of groups of continuously distributed drainage grooves along the extension direction of the foundation pit, the pipe openings at both ends of the drainage pipe network are connected with the drainage grooves, and the upper end surface of each group of the drainage grooves is covered with a groove cover.
[0008] By adopting the above-mentioned technical scheme, the present application improves the load strength of the permeable pavement by laying a concrete leveling layer, thereby ensuring the structural stability of the pavement; by laying a crushed stone layer, a coarse sand layer and a permeable brick layer in sequence, the penetration of accumulated water in the permeable pavement is improved, thereby reducing the damage to the structure of the collapsible loess soil layer caused by road water accumulation; the setting of the drainage network improves the seepage efficiency of the underground permeable road, and directs the accumulated water into the drainage ditch in a direction, making it convenient for the staff to further deal with the accumulated water; the setting of the ditch cover prevents pedestrians from falling into the drainage ditch, and at the same time, when the operating personnel need to deal with the accumulated water in the drainage ditch, they only need to open the ditch cover for pumping out the water.
[0009] Preferably, the drainage pipe network is arranged in an arch shape along the width direction of the foundation pit.
[0010] By adopting the above technical scheme, since water is most likely to accumulate in the middle of the road, the arched drainage network is conducive to the infiltration of the accumulated water in the middle of the road downwards, reducing the infiltration distance of the accumulated water, and improving the infiltration efficiency of the accumulated water, thereby reducing road water accumulation in collapsible loess; at the same time, the design of the arched structure is conducive to the discharge of accumulated water in the drainage network into the drainage ditches on both sides, thereby improving the drainage rate of the drainage network.
[0011] Preferably, the drainage pipe network includes horizontal drainage pipes perpendicular to the extension direction of the foundation pit, and vertical drainage pipes in the same extension direction as the foundation pit. The longitudinal drainage pipe located at the center has the largest aperture, and the diameters of the longitudinal drainage pipes located on both sides decrease successively; the horizontal drainage pipes have the same diameter, and each group of the longitudinal drainage pipes has horizontal openings penetrating the circumferential side walls, and the horizontal drainage pipes are sealed and plugged into the openings of the two adjacent groups of the longitudinal drainage pipes.
[0012] By adopting the above technical solution, since water accumulation is most likely to form in the middle of the road, the diameter of the longitudinal drainage pipe located in the center is set to the largest, which adapts to the maximum drainage capacity of the longitudinal drainage pipe in the middle position, achieves the maximum permeability of underground water, and further improves the permeability effect of the permeable road pavement structure; horizontal through-holes are opened on the longitudinal drainage pipe, which facilitates the through-and-through connection of the transverse drainage pipe. Compared with the use of four-way pipe joints to connect the longitudinal and transverse drainage pipes, this connection method reduces the need for construction workers to cut the pipe openings when laying the drainage network, thereby improving the paving efficiency of the permeable pavement.
[0013] Preferably, an arched steel mesh is arranged at the upper end of the drainage network, and a horizontal steel mesh is laid at the lower end of the drainage network, and both side edges of the arched steel mesh and the horizontal steel mesh are bound together.
[0014] By adopting the above technical solution, the setting of the arched steel mesh is conducive to filtering the sediments and large particles in the infiltrating accumulated water, reducing the probability of the sediments and large particles in the accumulated water clogging the holes on the upper end surface of the drainage network, ensuring the permeability of the holes, and thus improving the water permeability efficiency; at the same time, the two side edges of the arched steel mesh are tied to the two side edges of the horizontal steel mesh, which plays a certain supporting role in the arched structure of the drainage network and ensures the structural stability of the drainage main network underground.
[0015] Preferably, the arched steel mesh and the horizontal steel mesh are both coated with a uniformly distributed anti-rust paint layer.
[0016] By adopting the above technical scheme, both the arched steel mesh and the horizontal steel mesh contain metal materials, which are easily corroded by water and air in the damp underground environment. The corroded arched steel mesh is easy to fall off with the penetration of accumulated water. The rusted metal pieces after falling off will block the holes and even form deposits in the horizontal and vertical drainage pipes, reducing the diameter of the horizontal and vertical drainage pipes, thereby affecting the penetration efficiency of accumulated water. The setting of the anti-rust paint layer avoids the direct contact between the metal material and the underground air, water, etc., delays the corrosion efficiency of the arched steel mesh and the horizontal steel mesh underground, and extends the service life of the arched steel mesh and the horizontal steel mesh.
[0017] Preferably, the upper end surface of each group of the slot covers is penetrated by a plurality of groups of slots.
[0018] By adopting the above technical solution, the setting of the groove is conducive to the accumulation of water on the road surface to flow directly into the drainage ditch through the groove, reducing the infiltration pressure of the permeable pavement structure on the road, reducing road surface water accumulation, and ensuring the structural stability of collapsible loess.
[0019] In summary, the present application includes at least one of the following beneficial technical effects:
[0020] 1. By adopting the above technical scheme, the present application improves the load strength of the permeable pavement by laying a concrete leveling layer, and ensures the structural stability of the pavement; by laying a crushed stone layer, a coarse sand layer and a permeable brick layer in sequence, the penetration of accumulated water in the permeable pavement is improved, and the damage to the collapsible loess soil layer structure caused by road accumulation is reduced; the setting of the drainage network improves the water seepage efficiency of the underground permeable road, and the accumulated water is directed into the drainage trough, which is convenient for the staff to further deal with the accumulated water; the setting of the trough cover prevents pedestrians from falling into the drainage trough, and when the operating personnel need to deal with the accumulated water in the drainage trough, they only need to open the trough cover for pumping;
[0021] 2. The arched structure of the drainage network is designed to facilitate the drainage of the accumulated water in the drainage network into the drainage troughs on both sides, thereby improving the drainage rate of the drainage network; the diameter of the longitudinal drainage pipe located in the center is set to the maximum, which adapts to the maximum drainage capacity of the longitudinal drainage pipe in the middle position and achieves the maximum permeability of underground water seepage;
[0022] 3. The setting of the arched steel mesh is conducive to filtering the sediments and large particles in the infiltrating accumulated water, reducing the probability of the sediments and large particles in the accumulated water clogging the holes on the upper end surface of the drainage network; at the same time, it plays a certain supporting role for the arched structure of the drainage network. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;
[0024] Figure 2 It is a structural schematic diagram in which part of the structure of the embodiment of the present application is hidden.
[0025] Explanation of the accompanying reference numerals: 1. foundation pit; 2. concrete leveling layer; 3. drainage pipe network; 4. permeable holes; 5. gravel layer; 6. coarse sand layer; 7. permeable brick layer; 8. drainage trough; 9. trough cover; 10. horizontal drainage pipe; 11. vertical drainage pipe; 12. arched steel mesh; 13. horizontal steel mesh; 14. notch. DETAILED DESCRIPTION
[0026] The following is combined with Figure 1-2 This application is described in further detail.
[0027] The present application embodiment discloses a concrete permeable road pavement structure for collapsible loess. Figure 1 and Figure 2 A foundation pit 1 is excavated along the collapsible loess, and a concrete leveling layer 2 is laid on the inner bottom surface of the foundation pit 1. A drainage network 3 distributed in a criss-cross pattern is laid on the upper end surface of the concrete leveling layer 2. A plurality of groups of permeable holes 4 are opened on the upper surface of the drainage network 3, and a crushed stone layer 5 is laid on the upper end surface of the drainage network 3. The crushed stone particles of the crushed stone layer 5 are larger than the size of the permeable holes 4. The setting of the drainage network 3 is conducive to the directional diversion of accumulated water into the drainage ditch 8.
[0028] Reference Figure 1The upper end surface of the crushed stone layer 5 is evenly paved with a coarse sand layer 6, and the upper end surface of the coarse sand layer 6 is paved with a permeable brick layer 7; the crushed stone layer 5, the coarse sand layer 6 and the permeable brick layer 7 are laid in sequence, which improves the penetration of accumulated water in the permeable pavement; a number of groups of continuously distributed drainage grooves 8 are arranged on the edges of both sides of the foundation pit 1 along the extension direction of the foundation pit 1, and the pipe openings at both ends of the drainage pipe network 3 are connected with the drainage grooves 8, and the upper end surface of each group of drainage grooves 8 is covered with a groove cover 9; the upper end surface of each group of groove covers 9 is penetrated with a number of groups of notches 14; the setting of the notches 14 is conducive to the accumulated water on the road surface to flow directly into the drainage grooves 8 through the notches 14, thereby reducing the penetration pressure of the permeable pavement structure on the road.
[0029] Reference Figure 2 The drainage pipe network 3 is arranged in an arch shape along the width direction of the foundation pit 1; the arched drainage pipe network 3 is conducive to the downward infiltration of the accumulated water in the middle of the road, reducing the infiltration distance of the accumulated water and improving the infiltration efficiency of the accumulated water; the drainage pipe network 3 includes a horizontal drainage pipe 10 perpendicular to the extension direction of the foundation pit 1, and a longitudinal drainage pipe 11 in the same extension direction as the foundation pit 1, the horizontal drainage pipes 10 have the same diameter, and each group of longitudinal drainage pipes 11 has horizontally penetrating openings on the circumferential side walls, and the horizontal drainage pipes 10 are sealed and plugged into the openings of the two adjacent groups of longitudinal drainage pipes 11; this connection method reduces the need for construction personnel to cut the pipe openings when laying the drainage pipe network 3, thereby improving the laying efficiency of the permeable pavement.
[0030] Reference Figure 2 The longitudinal drainage pipe 11 located at the center has the largest aperture, and the diameters of the longitudinal drainage pipes 11 located on both sides decrease successively; the diameter of the longitudinal drainage pipe 11 located at the center is set to the largest, which adapts to the maximum drainage capacity of the longitudinal drainage pipe 11 in the middle position, realizes the maximum permeability of underground water seepage, and further improves the permeable effect of the permeable road pavement structure.
[0031] Reference Figure 1 and Figure 2 An arched steel mesh 12 is set at the upper end of the drainage network 3, and a horizontal steel mesh 13 is laid at the lower end of the drainage network 3. The arched steel mesh 12 and the horizontal steel mesh 13 are tied at both side edges; the setting of the arched steel mesh 12 is conducive to filtering the sediments and large particles in the infiltrating accumulated water. At the same time, the two side edges of the arched steel mesh 12 and the two side edges of the horizontal steel mesh 13 are tied, which plays a certain supporting role on the arched structure of the drainage network 3 and ensures the structural stability of the drainage main network underground.
[0032] Reference Figure 1 The arched steel mesh 12 and the horizontal steel mesh 13 are coated with a uniformly distributed anti-rust paint layer; the setting of the anti-rust paint layer avoids the direct contact between the metal material and the underground air, water, etc., delays the underground corrosion efficiency of the arched steel mesh 12 and the horizontal steel mesh 13, and extends the service life of the arched steel mesh 12 and the horizontal steel mesh 13.
[0033] The implementation principle of a concrete permeable road pavement structure for collapsible loess in the embodiment of the present application is:
[0034] Workers excavate a foundation pit 1 along the collapsible loess, and lay a concrete leveling layer 2 on the bottom surface of the foundation pit 1, preferably permeable concrete, to improve the permeability of the permeable road; positions of drainage ditches 8 are reserved on the edges of both sides of the foundation pit 1, and a crushed stone layer 5 is laid on the upper end surface of the concrete leveling layer 2, a horizontal steel mesh 13 is laid on the crushed stone layer 5, and a drainage pipe network 3 is installed on the horizontal steel mesh 13.
[0035] After the operators have placed the longitudinal drainage pipes 11, they will insert the transverse drainage pipes 10 into the openings of the two adjacent groups of longitudinal drainage pipes 11 in sequence, and apply a waterproof adhesive layer at the insertion position for further sealing, so that each group of water-permeable holes 4 is set upward; after the drainage network 3 is laid, the arched steel mesh 12 is erected on the drainage network 3, and the two side edges of the arched steel mesh 12 are tied and fixed to the two side edges of the horizontal steel mesh 13.
[0036] After the arched steel mesh 12 and the horizontal steel mesh 13 are fixed, the gravel layer 5 is continuously filled into the gap between the drainage network 3 and the arched steel mesh 12; the coarse sand layer 6 and the permeable cushion layer are laid in sequence on the upper end surface of the gravel layer 5; the upper end of the drainage groove 8 is covered with a groove cover 9; the concrete permeable road pavement structure of the collapsible loess is completed; the present application improves the road permeability of the loess and protects the soil structure of the loess. The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.
Claims
1. A concrete permeable road pavement structure for collapsible loess, characterized by: A foundation pit (1) is excavated along collapsible loess. The inner bottom surface of the foundation pit (1) is paved with a concrete leveling layer (2). The upper end surface of the concrete leveling layer (2) is paved with a drainage network (3) distributed in a crisscross pattern. The upper surface of the drainage network (3) is provided with a plurality of groups of water-permeable holes (4). The upper end surface of the drainage network (3) is paved with a crushed stone layer (5). The crushed stone particles of the crushed stone layer (5) are larger than the size of the water-permeable holes (4). The upper end surface of the crushed stone layer (5) is evenly paved with a coarse sand layer (6). The upper end surface of the coarse sand layer (6) is paved with a permeable brick layer (7). The two side edges of the foundation pit (1) are provided with a plurality of groups of continuously distributed drainage grooves (8) along the extension direction of the foundation pit (1). The pipe openings at both ends of the drainage network (3) are connected to the drainage grooves (8). The upper end surface of each group of the drainage grooves (8) is covered with a groove cover (9).
2. The concrete permeable road pavement structure for collapsible loess according to claim 1, characterized in that: The drainage pipe network (3) is arranged in an arch shape along the width direction of the foundation pit (1).
3. The concrete permeable road pavement structure for collapsible loess according to claim 2, characterized in that: The drainage pipe network (3) comprises a transverse drainage pipe (10) perpendicular to the extension direction of the foundation pit (1), and a longitudinal drainage pipe (11) extending in the same direction as the foundation pit (1), wherein the longitudinal drainage pipe (11) located at the center has the largest aperture, and the diameters of the longitudinal drainage pipes (11) located at both sides decrease in sequence; the transverse drainage pipes (10) have the same diameter, and each group of the longitudinal drainage pipes (11) has a horizontally penetrating opening on the circumferential side wall, and the transverse drainage pipe (10) is sealed and plugged into the openings of two adjacent groups of the longitudinal drainage pipes (11).
4. The concrete permeable road pavement structure for collapsible loess according to claim 3, characterized in that: An arched steel mesh (12) is mounted on the upper end of the drainage pipe network (3), and a horizontal steel mesh (13) is laid on the lower end of the drainage pipe network (3). The arched steel mesh (12) and the horizontal steel mesh (13) are bound together at their two side edges.
5. The concrete permeable road pavement structure for collapsible loess according to claim 4, characterized in that: The arched steel mesh (12) and the horizontal steel mesh (13) are both coated with a uniformly distributed anti-rust paint layer.
6. The concrete permeable road pavement structure for collapsible loess according to claim 5, characterized in that: The upper end surface of each group of slot covers (9) is penetrated by a plurality of groups of slot openings (14).