Roadbed with waterproof and hydrophobic functions

Abstract

According to the roadbed with the waterproof and hydrophobic functions provided by the utility model, the seepage-proof geomembrane and the first reverse filter geotextile are arranged, so that water on the pavement structure layer and water in the ground are effectively isolated from permeating the filling roadbed, the waterproof function of the filling roadbed is improved, and the stability and durability of the filling roadbed are ensured; meanwhile, an efficient drainage system is jointly constructed through the design of a first drainage pipe, a second drainage pipe, a third drainage pipe and a fourth drainage pipe, accumulated water on the surface of the pavement structure layer and seepage water in the roadbed can be rapidly guided to drainage ditches, and damage of the accumulated water to the roadbed is effectively prevented; a second concrete layer is arranged on the surface of a side slope formed by the splicing surfaces of the original roadbed and the filling roadbed to serve as a waterproof barrier, so that the waterproof performance of the roadbed is further enhanced, water can naturally flow inside and outside the filling roadbed and is discharged, and the waterproof and hydrophobic performance of the roadbed is greatly improved; the service life of the roadbed and the walking safety are favorably prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of roadbed design, in particular to a roadbed with waterproof and hydrophobic functions. Background Art

[0002] The roadbed is the supporting structure of the road, and its stability and durability are directly related to the service life of the road. Since roads are basically in the open air, they will be infiltrated by rainwater during rainfall or by moisture from other sources.

[0003] If rainwater or other water penetrates into the roadbed, it will easily lead to problems such as soil softening and roadbed settlement, affecting the flatness and driving safety of the road. At the same time, if rainwater or other water that penetrates into the roadbed cannot be discharged in time, it will cause water accumulation, which will not only affect driving safety, but also accelerate road damage.

[0004] Therefore, it is necessary to provide a roadbed with waterproof and hydrophobic functions to prevent external moisture from entering the interior of the foundation and to discharge the moisture that has entered the interior of the roadbed. Utility Model Content

[0005] Aiming at the technical problem in the prior art that water seepage in the roadbed easily leads to soil softening, roadbed settlement, water accumulation and affects the road life and driving safety, the utility model provides a roadbed with waterproof and hydrophobic functions.

[0006] A roadbed with waterproof and hydrophobic functions, comprising an original roadbed and a filled roadbed filled on one side of the original roadbed, wherein the filled roadbed is provided with a drainage ditch along the side away from the original roadbed, and an impermeable geomembrane, a first concrete layer, a crushed stone slope adjustment layer and a pavement structure layer are provided on the upper surface of the filled roadbed in sequence from bottom to top; a first drainage pipe is provided in the crushed stone slope adjustment layer; a second drainage pipe is provided on the end surface of the pavement structure layer away from the original roadbed; a first drainage pipe is provided on the lower surface of the filled roadbed in sequence from top to bottom A filter geotextile and a crushed stone cushion layer, and the crushed stone cushion layer is in contact with the ground; the first drainage pipe and the second drainage pipe are both connected to the drainage ditch; the joint surface of the original roadbed and the filled roadbed forms a slope composed of a plurality of steps, and a plurality of third drainage pipes are arranged on the slope, and a fourth drainage pipe is arranged between adjacent third drainage pipes, and the third drainage pipes are arranged along the descending direction of the slope, and the third drainage pipes extend into the crushed stone cushion layer and are connected to the drainage ditch; a second concrete layer is also provided on the surface of the slope.

[0007] Furthermore, the pavement structure layer is provided with an anti-collision guardrail along the side away from the original roadbed; the anti-collision guardrail includes a guardrail body and a guardrail base cast by concrete, the guardrail body is fixed on the guardrail base, the guardrail base is fixed on the first concrete layer, and the first drainage pipe passes through the guardrail body, the second drainage pipe passes through the guardrail base, and are respectively connected to the drainage ditch.

[0008] Furthermore, a panel base is provided at one end of the crushed stone cushion layer away from the original roadbed, and a concrete slab abutting against the side surface of the filled roadbed is provided on the panel base.

[0009] Furthermore, the filling roadbed includes a bubble mixed lightweight soil layer and a plurality of supporting angle steels arranged in the bubble mixed lightweight soil layer, one end of the supporting angle steel is inserted into the guardrail base, and the other end is inserted into the panel base and fixed to the ground below the panel base.

[0010] Furthermore, the top surface and the ground of the bubble mixed lightweight soil layer are provided with a plurality of steel mesh layers; the steel mesh layer comprises a plurality of steel mesh sheets fixedly arranged in sequence on the top surface or the bottom surface of the bubble mixed lightweight soil layer, and the adjacent steel mesh sheets are staggered and overlapped, and are fixed by steel wire binding.

[0011] Furthermore, a gravel blind ditch is provided between the step and the filled roadbed, and the fourth drainage pipe is located in the gravel blind ditch.

[0012] Furthermore, a second anti-filter geotextile is provided on the second concrete layer.

[0013] Furthermore, the third drainage pipe is provided with a plurality of U-shaped nails for fixing the third drainage pipe on the original roadbed or the ground.

[0014] Furthermore, the first drain pipe and the second drain pipe are PVC water pipes; the third drain pipe and the fourth drain pipe are soft permeable pipes. The beneficial effects of the utility model are as follows: the utility model provides a roadbed with waterproof and hydrophobic functions, and through the setting of the anti-seepage geomembrane and the first anti-filtration geotextile, the moisture on the pavement structure layer and the moisture in the ground are effectively isolated from the penetration of the filled roadbed, thereby improving the waterproof function of the filled roadbed and ensuring the stability and durability of the filled roadbed; at the same time, through the design of the first drain pipe, the second drain pipe, the third drain pipe and the fourth drain pipe, an efficient drainage system is jointly constructed, which can quickly lead the surface water of the pavement structure layer and the infiltration water inside the roadbed to the drainage ditch, effectively preventing the damage of the roadbed to the roadbed by the accumulated water, and setting a second concrete layer as a waterproof barrier on the slope surface formed by the joint surface of the original roadbed and the filled roadbed, further enhancing the waterproof performance of the roadbed, ensuring that the moisture can flow and be discharged naturally from the inside and outside of the filled roadbed, greatly improving the waterproof and hydrophobic performance of the roadbed, and being conducive to extending the service life of the roadbed and the safety of walking. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a roadbed with waterproof and hydrophobic functions provided by the utility model;

[0016] Figure ID

[0017] 1. Original roadbed; 2. Filled roadbed; 21 Bubble mixed lightweight soil layer; 22. Support angle steel; 3. Drainage ditch; 4. Anti-seepage geomembrane; 5. First concrete layer; 6. Gravel slope adjustment layer; 7. Pavement structure layer; 8. First drainage pipe; 9. Second drainage pipe; 10. First anti-filter geotextile; 11. Gravel cushion layer; 12. Third drainage pipe; 13. Anti-collision guardrail; 131. Guardrail body; 132. Guardrail base; 14. Steel mesh layer; 15. Gravel blind ditch; 16. Second concrete layer; 17. U-shaped nails; 18. Concrete slab; 19. Fourth drainage pipe; 20. Panel base. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings. The described embodiments are only a part of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0019] refer to Figure 1As shown, a roadbed with waterproof and hydrophobic functions includes an original roadbed 1 and a filled roadbed 2 filled on one side of the original roadbed 1, a drainage ditch 3 is provided on the side of the filled roadbed 2 away from the original roadbed 1, and an impermeable geomembrane 4, a first concrete layer 5, a crushed stone slope adjustment layer 6 and a pavement structure layer 7 are provided on the upper surface of the filled roadbed 2 from top to bottom. The impermeable geomembrane 4 can effectively prevent moisture from penetrating into the inside of the roadbed and maintain the stability and dryness of the roadbed. The first concrete layer 5 not only provides protection for the impermeable geomembrane 4, but also enhances the overall strength and waterproof performance of the roadbed, further prevents moisture from penetrating, and ensures the waterproof effect of the roadbed. The crushed stone slope adjustment layer 6 has good permeability and hydrophobicity, and can effectively guide the moisture that penetrates from the pavement structure layer 7 to the drainage ditch 3 to achieve rapid drainage. In this embodiment, the surfaces of the crushed stone slope adjustment layer 6 and the pavement structure layer 7 are both sloped, and the slope of the slope decreases along the direction away from the original roadbed 1. The diameter of the crushed stones in the crushed stone slope adjustment layer 6 is not greater than 4 cm.

[0020] A first anti-filter geotextile 10 and a crushed stone cushion layer 11 are arranged in sequence from top to bottom on the lower surface of the filling roadbed 2, and the crushed stone cushion layer 11 is in contact with the ground. The first anti-filter geotextile 10 and the crushed stone cushion layer 11 have certain tensile strength and elongation, which can improve the overall stability of the roadbed and reduce the settlement of the roadbed; at the same time, the first anti-filter geotextile 10 can effectively isolate the moisture of the ground soil and the filling roadbed 2, and prevent the moisture from mixing and penetrating; the crushed stone cushion layer 11 has good water permeability and can quickly discharge the incoming moisture.

[0021] A first drainage pipe 8 is provided in the crushed stone slope adjustment layer 6; a second drainage pipe 9 is provided on the end surface of the pavement structure layer 7 away from the original roadbed 1; the first drainage pipe 8 and the second drainage pipe 9 are both connected to the drainage ditch 3; a slope consisting of a plurality of steps is formed on the joint surface of the original roadbed 1 and the filling roadbed 2, and a plurality of third drainage pipes 12 are provided on the slope, and a fourth drainage pipe 19 is provided between each of the adjacent third drainage pipes 12, and the third drainage pipes 12 are arranged along the descending direction of the slope, and the third drainage pipes 12 extend into the crushed stone cushion layer 11 and are connected to the drainage ditch 3; a second concrete layer 16 is provided on the surface of the slope. In this embodiment, the third drainage pipe 12 is half buried in the slope of the original roadbed 1, and the opening of the third drainage pipe 12 faces the slope surface. The second concrete layer 16 is sprayed after the third drainage pipe 12 is buried, and the thickness of the second concrete layer 16 is 3 cm.

[0022] The design of the first drain pipe 8, the second drain pipe 9 and the third drain pipe 12 together constructs an efficient drainage system, which can quickly lead the surface water of the pavement structure layer 7 and the infiltration water inside the roadbed to the drainage ditch, effectively preventing the damage of the roadbed by the accumulated water, ensuring that the water can flow and be discharged naturally from the filled roadbed inside and outside, greatly improving the waterproof and hydrophobic properties of the roadbed, which is conducive to extending the service life of the roadbed and the safety of walking. The second concrete layer 16 can enhance the strength and bearing capacity of the original roadbed 1 joint surface, and at the same time, can form a waterproof barrier on the slope to further enhance the waterproof performance of the roadbed.

[0023] A gravel blind ditch 15 is laid between the step and the filled roadbed 2, and the fourth drainage pipe 19 is located in the gravel blind ditch 15. The opening of the third drainage pipe 12 is located in the gravel blind ditch 15. A second anti-filter geotextile (not shown in the figure) is also provided on the second concrete layer 16. The second anti-filter geotextile can limit the movement of soil particles, reduce the settlement and deformation of the roadbed, thereby enhancing the stability of the roadbed, extending the service life of the roadbed, and reducing maintenance costs.

[0024] The slope formed by the step structure can disperse the contact pressure between the original roadbed 1 and the filled roadbed 2, improve the stability of the joint surface, and reduce the roadbed deformation and crack problems caused by uneven soil compaction or foundation settlement. The setting of the gravel blind ditch 15, the third drainage pipe 12, and the fourth drainage pipe 19 enhances the drainage capacity of the roadbed, ensures that water can be discharged quickly and effectively, prevents water from accumulating inside the roadbed, and thus reduces the damage to the roadbed caused by water damage.

[0025] Preferably, in this embodiment, the first anti-filter geotextile 10 and the second anti-filter geotextile both adopt SNG-PP-300-3 short fiber needle-punched non-woven type, with a unit area mass of 300g / m2, a thickness of not less than 2.4mm, a width of not less than 3m, a longitudinal and transverse breaking strength of not less than 9.5kN / m, a longitudinal and transverse breaking elongation of not more than 50%, a vertical permeability coefficient of not less than 5×10-2cm / s, and a longitudinal and transverse tear strength of not less than 1.5kN.

[0026] The third drain pipe 12 is provided with a plurality of U-shaped nails 17 for fixing the third drain pipe 12 on the original roadbed 1 or the ground. The U-shaped nails can firmly fix the drain pipe on the original roadbed 1 or the ground to prevent it from shifting or deforming.

[0027] Preferably, the first drain pipe 7 and the second drain pipe 8 are PVC water pipes; the third drain pipe 12 and the fourth drain pipe 19 are soft permeable pipes. PVC water pipes have excellent corrosion resistance and can resist corrosion from a variety of chemical substances such as acids, alkalis, and salts, thereby ensuring that the drainage pipes are not easily damaged or leaked during long-term use. Soft permeable pipes have excellent flexibility and bending properties, can adapt to terrain changes and roadbed settlement, and ensure that the drainage pipes always remain unobstructed. The outer wall of the soft permeable pipe has a large number of small holes, which can effectively collect and discharge moisture in the soil, thereby improving the drainage capacity of the roadbed.

[0028] The pavement structure layer 7 is provided with an anti-collision guardrail 13 along the side away from the original roadbed 1; the anti-collision guardrail 13 includes a guardrail body 131 and a guardrail base 132 cast by concrete, the guardrail body 131 is fixedly arranged on the guardrail base 132, the guardrail base 132 is fixed on the second concrete layer 5, and the first drainage pipe 8 passes through the guardrail body 131, the second drainage pipe 9 passes through the guardrail base 132, and are respectively connected to the drainage ditch 3.

[0029] A panel base 20 is provided at one end of the crushed stone cushion layer 11 away from the original roadbed 1 , and a concrete stone slab 18 abutting against the side surface of the filled roadbed 1 is provided on the panel base 20 .

[0030] The filling roadbed 2 includes a bubble mixed lightweight soil layer 21 and a plurality of support angle steels 22 arranged in the bubble mixed lightweight soil layer 21, one end of the support angle steel 22 is inserted into the guardrail base 132, and the other end is inserted into the panel base 20 and fixed to the ground below the panel base 20. The support angle steel 22 can be used to support the guardrail base 132. The support angle steel 22 is arranged in the bubble mixed lightweight soil layer 21, which provides a stable support for the guardrail base 132 and ensures the stability and safety of the anti-collision guardrail 13. In this embodiment, the support angle steel 22 is inserted into the bottom 15 cm of the guardrail base 132 and extends to 100 cm below the panel base 20. The wet weight of the bubble light soil in the roadbed area (close to the ground) of bubble light soil layer 8 should be no less than 6.5-7.5 kN / m°, and the compressive strength should be no less than 1.5 MPa; the wet weight of the bubble mixed light soil in other parts should be 5.5-6.5 kN / m3, and the compressive strength should be no less than 1 MPa. The fluidity during construction should be controlled at 160-200 mm.

[0031] The top surface and the ground of the bubble mixed light soil layer 8 are both provided with a plurality of steel mesh layers 14; the steel mesh layer 14 comprises a plurality of steel mesh sheets fixedly arranged on the top surface or the bottom surface of the bubble mixed light soil layer in sequence, and the adjacent steel mesh sheets are staggered and overlapped, and are fixed by steel wire binding. By placing the top surface or the bottom surface of the bubble mixed light soil layer 8 where stress is relatively concentrated, the stability and bearing capacity of the overall filling roadbed 3 can be improved.

[0032] In this embodiment, the top surface and the ground of the bubble-mixed lightweight soil layer 8 are both provided with two layers of 3.2 mm steel mesh. When adjacent steel meshes are staggered and overlapped, the overlap positions should be staggered by more than 50 cm, and the overlap width should not be less than 20 cm. The bubble-mixed lightweight soil layer is constructed by horizontal layered pouring, and the thickness of a single layer is controlled to be 0.3 m to 0.8 m.

[0033] The utility model provides a roadbed with waterproof and hydrophobic functions. Through the arrangement of an anti-seepage geomembrane 4 and a first anti-filtration geotextile 10, the penetration of moisture on the pavement structure layer 7 and moisture in the ground into the filled roadbed is effectively isolated, the waterproof function of the filled roadbed 2 is improved, and the stability and durability of the filled roadbed 2 are ensured; at the same time, through the design of a first drain pipe 8, a second drain pipe 9, a third drain pipe 12 and a fourth drain pipe 19, an efficient drainage system is jointly constructed, which greatly improves the waterproof and hydrophobic performance of the roadbed, and effectively prolongs the service life of the roadbed and the safety of walking.

[0034] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model, and do not limit the utility model to the specific implementation methods described. Obviously, other modifications and changes can be made according to the content of this specification. The embodiments selected and specifically described in this specification are to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can understand and use the utility model well. It is not a limitation of the utility model. Any solution after simple deformation of the utility model belongs to the protection scope of the utility model.

Claims

1. A roadbed with waterproof and hydrophobic functions, comprising an original roadbed and a filled roadbed filled on one side of the original roadbed, characterized in that: The filled roadbed is provided with a drainage ditch along the side away from the original roadbed, and the upper surface of the filled roadbed is provided with an impermeable geomembrane, a first concrete layer, a crushed stone slope adjustment layer and a pavement structure layer in sequence from bottom to top; a first drainage pipe is provided in the crushed stone slope adjustment layer; a second drainage pipe is provided on the end surface of the pavement structure layer away from the original roadbed; a first anti-filter geotextile and a crushed stone cushion layer are provided in sequence from top to bottom on the lower surface of the filled roadbed, and the crushed stone cushion layer is in contact with the ground; the first drainage pipe and the second drainage pipe are both connected to the drainage ditch; the joint surface of the original roadbed and the filled roadbed forms a slope composed of a plurality of steps, and a plurality of third drainage pipes are provided on the slope, and a fourth drainage pipe is provided between adjacent third drainage pipes, and the third drainage pipes are arranged along the descending direction of the slope gradient, and the third drainage pipes extend into the crushed stone cushion layer and are connected to the drainage ditch; a second concrete layer is also provided on the surface of the slope.

2. The roadbed with waterproof and hydrophobic functions according to claim 1, characterized in that: The pavement structure layer is provided with an anti-collision guardrail along the side away from the original roadbed; the anti-collision guardrail includes a guardrail body and a guardrail base cast by concrete, the guardrail body is fixed on the guardrail base, the guardrail base is fixed on the first concrete layer, and the first drainage pipe passes through the guardrail body, the second drainage pipe passes through the guardrail base, and are respectively connected to the drainage ditch.

3. The roadbed with waterproof and hydrophobic functions according to claim 2, characterized in that: A panel base is provided at one end of the crushed stone cushion away from the original roadbed, and a concrete stone slab abutting against the side surface of the filled roadbed is provided on the panel base.

4. The roadbed with waterproof and hydrophobic functions according to claim 3, characterized in that: The filling roadbed includes a bubble mixed lightweight soil layer and a plurality of supporting angle steels arranged in the bubble mixed lightweight soil layer, one end of the supporting angle steel is inserted into the guardrail base, and the other end is inserted into the panel base and fixed to the ground below the panel base.

5. The roadbed with waterproof and hydrophobic functions according to claim 4, characterized in that: The top surface and the ground of the bubble-mixed lightweight soil layer are both provided with a plurality of steel mesh layers; the steel mesh layer comprises a plurality of steel mesh sheets which are sequentially fixedly arranged on the top surface or the bottom surface of the bubble-mixed lightweight soil layer, and the adjacent steel mesh sheets are staggered and overlapped and fixed by steel wire binding.

6. The roadbed with waterproof and hydrophobic functions according to claim 1, characterized in that: A gravel blind ditch is provided between the step and the filling roadbed, and the fourth drainage pipe is located in the gravel blind ditch.

7. The roadbed with waterproof and hydrophobic functions according to claim 1, characterized in that: A second anti-filter geotextile is also arranged on the second concrete layer.

8. The roadbed with waterproof and hydrophobic functions according to claim 1, characterized in that: The third drainage pipe is provided with a plurality of U-shaped nails for fixing the third drainage pipe on the original roadbed or the ground.

9. The roadbed with waterproof and hydrophobic functions according to claim 1, characterized in that: The first drain pipe and the second drain pipe are PVC water pipes; the third drain pipe and the fourth drain pipe are soft permeable pipes.

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