Road adjacent slope side drainage ditch

Abstract

The utility model discloses a highway adjacent slope side drainage ditch which comprises a ditch body formed in the adjacent slope side of a highway in the longitudinal direction of the highway, an open drainage ditch is formed in the upper portion of the ditch body in the longitudinal direction of the highway, and a blind drainage ditch is formed in the lower portion of the ditch body in the longitudinal direction of the highway. The open drainage ditch is composed of a groove and a grid cover, and the blind drainage ditch is composed of a drainage module, permeable geotextile and a sand gravel inverted filter layer; wherein the section of the groove is of a U-shaped structure, a clamping table is arranged on the inner edge of a groove opening of the groove in the length direction, the grid cover is clamped and fixed in the clamping table, and the upper surface of the grid cover is flush with the road surface of a road. The drainage system has the advantages that accumulated water or rainwater on the ground surface is effectively collected through the open drainage ditch, efficient drainage is guaranteed, meanwhile, surface water infiltration can be reduced, the permeable and drainage capacity is enhanced through the blind drainage ditch, it is guaranteed that the drainage module is not prone to being blocked, standardized and modularized production of the open drainage ditch and the blind drainage ditch is achieved, and the production cost is reduced. And construction and laying of the drainage ditch are more convenient and standard.

Description

Technical Field

[0001] The utility model relates to the technical field of highway drainage, in particular to a drainage ditch on the slope side of a highway. Background Art

[0002] The drainage ditch of the highway is often divided into two parts: open drainage ditch on the road surface and underground drainage blind ditch. Among them, the underground drainage blind ditch is one of the important factors affecting the stability and strength of the highway roadbed. The groundwater level is mainly affected by factors such as the upper and lower water levels and the infiltration of surface rainwater. The underground drainage blind ditch set at the bottom of the drainage ditch can effectively reduce the groundwater seepage pressure, thereby ensuring the stability of the roadbed structure.

[0003] The existing conventional underground drainage blind ditch mostly adopts the form of perforated drainage pipes, gravel drainage blind ditch, etc., and one or more drainage pipes are arranged at the bottom of the drainage ditch on the slope side of the highway according to the height of the water head. Perforated drainage pipes have the defects of high installation and positioning requirements, inability to adapt to foundation settlement, and easy damage. Although the gravel drainage blind ditch is simple to construct, cheap, and has a flexible structure that can adapt to foundation deformation, it has a small drainage area and is easy to be blocked. Summary of the invention

[0004] The utility model aims to provide a drainage ditch on the slope side of a highway in view of the defects of the prior art.

[0005] In order to achieve the above purpose, the utility model can adopt the following technical solutions:

[0006] The utility model discloses a drainage ditch on the slope side of a highway, comprising a ditch body opened on the slope side along the longitudinal direction of the highway, wherein an open drainage ditch is arranged on the upper part of the ditch body along the longitudinal direction of the highway, and a blind drainage ditch is arranged on the lower part of the ditch body along the longitudinal direction of the highway; the open drainage ditch is composed of a groove arranged on the upper part of the ditch body and a grid cover covering the notch of the ditch, and the blind drainage ditch is composed of a drainage module buried in the lower part of the ditch body, a permeable geotextile coated on the outer surface of the drainage module, and a sand and gravel filter layer covering the outer periphery of the permeable geotextile; wherein the cross section of the ditch is a U-shaped structure, a clamping platform is opened at the inner edge of the notch of the ditch along the length direction, the grid cover is clamped in the clamping platform, and its upper surface is flush with the road surface of the highway.

[0007] Specifically, the drainage module includes a rectangular drainage box body made of polypropylene, and drainage pipe racks that are cross-arranged horizontally and vertically and connected are arranged in the rectangular drainage box body.

[0008] Furthermore, the thickness of the sand and gravel filter layer is 0.3-0.5 m.

[0009] The utility model has the advantages that an open drainage ditch is formed by the grooves and the grid cover arranged at the upper part of the ditch body, so that the accumulated water or rainwater on the surface (i.e. the road surface and the surface on the slope side of the highway) is effectively collected, and the infiltration of surface water can be reduced while ensuring efficient drainage, and then a drainage blind ditch is formed by the drainage module, the permeable geotextile and the gravel filter layer arranged at the lower part of the ditch body, so that the large porosity of the drainage module is utilized to enhance the permeability and drainage capacity, and ensure that the drainage module is not easily blocked, so as to realize the standardized and modular production of the drainage open ditch and the drainage blind ditch, and make the construction and laying of the drainage ditch more convenient and standard. At the same time, the rectangular drainage box of the drainage module is still surrounded by the plastic mesh plate, so it has a certain flexibility and can adapt to the deformation of the foundation, thereby making the applicable conditions more extensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model.

[0011] Figure 2 yes Figure 1 Magnified view of the median groove.

[0012] Figure 3 yes Figure 1 Axial enlarged view of the central drainage module. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0015] like Figure 1 , 2 As shown, the highway slope drainage ditch described in the utility model includes a ditch body 1 opened on the slope side 200 of the highway 100. The ditch body 1 should be opened along the longitudinal direction of the highway 100 (i.e., the length direction of the highway 100). The upper part of the ditch body 1 is provided with an open drainage ditch along the longitudinal direction of the highway 100, and the lower part thereof is provided with a blind drainage ditch along the longitudinal direction of the highway 100.

[0016] Specifically, the open drainage ditch is composed of a groove 2 arranged on the upper part of the ditch body 1, and a grille cover 3 covering the notch of the groove 2. The cross section of the groove 2 is a U-shaped structure, which can realize modular prefabrication. The width of the groove 2 should be consistent with the width of the ditch body 1, so that when the groove 2 is laid in the ditch body 1, its left and right side walls are just closely attached to the left and right side walls of the ditch body 1; in addition, a clamping platform 4 is also opened along the length direction at the inner edge of the notch of the groove 2, and the grille cover 3 can be just adapted to be clamped in the clamping platform 4, and when the grille cover 3 is clamped in the clamping platform 4, its upper surface is just flush with the road surface of the highway 100.

[0017] The blind drainage ditch is composed of a drainage module 5 buried in the lower part of the ditch body 1, a permeable geotextile 6 wrapped on the outer surface of the drainage module 5, and a sand and gravel filter layer 7 covering the outer periphery of the permeable geotextile 6. Figure 3 As shown, the drainage module 5 is a prefabricated finished module with the characteristics of large porosity and strong drainage. It specifically includes a rectangular drainage box 5.1 made of polypropylene. The rectangular drainage box 5.1 is a box with mesh holes. A drainage pipe rack 5.2 arranged horizontally and vertically and connected is arranged in the rectangular drainage box 5.1; at this time, the permeable geotextile 6 wrapped on the outer surface of the drainage module 5 and the gravel filter layer 7 covered on the outer periphery of the permeable geotextile 6 also have a rectangular structure, and the thickness of the gravel filter layer 7 is 0.3~0.5m, and the left and right side walls of the gravel filter layer 7 should just be closely attached to the left and right side walls of the ditch body 1.

[0018] During construction, firstly, a ditch body 1 is opened longitudinally on the slope side 200 of the highway 100, and then a gravel filter layer 7 is laid to the bottom of the ditch body 1. Note that only the lower half of the gravel filter layer 7 is laid, and then the outer side of the prefabricated drainage module 5 is covered with a permeable geotextile 6, and the drainage module 5 with the outer surface covered with the permeable geotextile 6 is laid on the gravel filter layer 7, and the upper half of the gravel filter layer 7 is laid again, so that the gravel filter layer 7 covers the outer periphery of the permeable geotextile 6, thereby completing the construction of the drainage blind ditch. In order to ensure smooth drainage of the drainage module 5, the bottom thickness of the gravel filter layer 7 can be slightly changed to achieve a slope drop of the drainage module 5 toward the downstream side.

[0019] After the blind drainage ditch is constructed, the prefabricated ditch 2 can be laid in the ditch body 1, and it is important to ensure that the bottom wall of the ditch 2 fits and presses against the top surface of the gravel filter layer 7 of the blind drainage ditch, and then the grating cover 3 is sealed on the notch of the ditch 2 to complete the construction of the entire drainage ditch. To ensure smooth drainage of the ditch 2, the top thickness of the gravel filter layer 7 can be slightly changed to achieve a slope drop of the ditch 2 toward the downstream side.

[0020] An open drainage ditch is formed by the groove 2 and the grid cover 3 arranged on the upper part of the ditch body 1, so that the accumulated water or rainwater on the surface (i.e., the road surface of the highway 100 and the surface of the slope side 200) is effectively collected, ensuring efficient drainage while reducing the infiltration of surface water; and a drainage blind ditch is formed by the drainage module 5, the permeable geotextile 6 and the gravel filter layer 7 arranged at the lower part of the ditch body 1, so that the large porosity of the drainage module 5 is utilized to enhance the permeability and drainage capacity, and ensure that the drainage module 5 is not easily blocked, so as to realize the standardized and modular production of the drainage open ditch and the drainage blind ditch, so that the construction and laying of the drainage ditch is more convenient and standardized, and at the same time, the rectangular drainage box 5.1 of the drainage module 5 is still surrounded by a plastic mesh plate, so it has a certain flexibility and can adapt to the deformation of the foundation, thereby making the applicable conditions more extensive.

Claims

1. A drainage ditch on the slope side of a highway, comprising a ditch body opened on the slope side along the longitudinal direction of the highway, an open drainage ditch is arranged on the upper part of the ditch body along the longitudinal direction of the highway, and a blind drainage ditch is arranged on the lower part of the ditch body along the longitudinal direction of the highway; characterized in that: The open drainage ditch is composed of a groove arranged at the upper part of the ditch body and a grille cover covering the notch of the groove; the blind drainage ditch is composed of a drainage module buried in the lower part of the ditch body, a permeable geotextile wrapped on the outer surface of the drainage module, and a sand and gravel filter layer covering the outer periphery of the permeable geotextile; wherein the cross section of the groove is a U-shaped structure, a clamping platform is opened at the inner edge of the notch of the groove along the length direction, the grille cover is clamped in the clamping platform, and its upper surface is flush with the road surface of the highway.

2. The highway slope drainage ditch according to claim 1, characterized in that: The drainage module comprises a rectangular drainage box body made of polypropylene, in which drainage pipe racks which are cross-arranged horizontally and vertically and are connected are arranged.

3. The highway slope side drainage ditch according to claim 1 or 2, characterized in that: The thickness of the sand and gravel filter layer is 0.3-0.5 m.

Images