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CN-122013872-A - Urban road drainage system based on sponge city idea

CN122013872ACN 122013872 ACN122013872 ACN 122013872ACN-122013872-A

Abstract

The application discloses an urban road drainage system based on a sponge urban concept, and particularly relates to the technical field of road drainage, which comprises a road body, wherein a rainwater inspection well is arranged in the middle of the road body, a foundation mat layer, a thick graded gravel layer, a geotextile filter layer, a thick sand layer, a thick planting soil layer and a permeable layer are arranged at the top of the foundation mat layer in a laid mode, the geotextile filter layer is arranged at the top of the thick graded gravel layer in a laid mode, the thick sand layer is arranged at the top of the geotextile filter layer in a laid mode, the thick planting soil layer is arranged at the top of the thick sand layer in a laid mode, and a broken stone blind ditch is buried in the thick graded gravel layer; according to the application, pollutants in rainwater can be effectively removed through the geotechnical cloth filter layer, the thick sand layer and the thick planting soil layer, the thick graded broken stone layer provides remarkable water storage capacity to reduce runoff peaks, and the combination of the broken stone blind ditches and the diversion pipes ensures ordered and rapid drainage of ultra-seeped rainwater, so that the rainwater runoff and the surface source pollution are controlled from the source.

Inventors

  • ZHU RUI
  • ZHANG MAOPENG
  • LI LIANGUO
  • REN ZHONGHUA
  • HU CHAO
  • CHEN PEIJI
  • ZHOU XIONG

Assignees

  • 中铁广州工程局集团有限公司
  • 中铁广州工程局集团第三工程有限公司

Dates

Publication Date
20260512
Application Date
20251231

Claims (10)

  1. 1. Urban road drainage system based on sponge city theory, including road body (1), its characterized in that, the middle part of road body (1) is provided with rainwater inspection shaft (2), foundation bed course (101), thick gradation gravel layer (102), geotechnique's cloth filter layer (103), thick sand layer (104), thick planting soil layer (105) and permeable layer (106), thick gradation gravel layer (102) have been laid at the top of foundation bed course (101), geotechnique's cloth filter layer (103) have been laid at the top of thick gradation gravel layer (102), thick sand layer (104) have been laid at the top of geotechnique's cloth filter layer (103), thick planting soil layer (105) have been laid at the top of thick sand layer (104), permeable layer (106) have been laid at the top of thick planting soil layer (105), buried gravel blind ditch (3) in thick gradation gravel layer (102).
  2. 2. The urban road drainage system based on the sponge urban concept of claim 1, wherein a permeable pavement structure (5) is arranged in a side pavement area communicated with a road body (1) between a gravel blind ditch (3) and a rainwater inspection well (2) through a guide pipe (4), the permeable pavement structure (5) comprises a permeable surface layer (501), a leveling sand filter layer (502) and a permeable base layer (503), the bottom of the permeable surface layer (501) is paved with the leveling sand filter layer (502), and the bottom of the leveling sand filter layer (502) is paved with the permeable base layer (503).
  3. 3. The urban road drainage system based on the sponge urban concept as claimed in claim 2, wherein a diversion blind pipe (6) is arranged below the permeable base layer (503), a water permeable groove (7) is formed in the top surface of the diversion blind pipe (6), and the diversion blind pipe (6) is communicated with the crushed stone blind ditch (3).
  4. 4. The urban road drainage system based on the sponge urban concept of claim 2, wherein the rainwater inspection well (2) comprises a shaft (201), a well cover (202), an activated carbon adsorption plate (203) and an anti-falling net (204), the top of the shaft (201) is provided with the well cover (202), the bottom end of the well cover (202) is provided with the activated carbon adsorption plate (203), and one side, far away from the well cover (202), of the activated carbon adsorption plate (203) is provided with the anti-falling net (204).
  5. 5. The urban road drainage system based on the sponge city concept of claim 4, wherein two sides of the bottom of the rainwater inspection well (2) are communicated with a rainwater pipe network (8), two sides of the bottom of the anti-falling net (204) are provided with fixed pull rings (9), the bottoms of the fixed pull rings (9) are connected with pull ropes (10), one ends, far away from the fixed pull rings (9), of the pull ropes (10) are connected with filter barrels (11), the filter barrels (11) are arranged at the bottom end of the rainwater inspection well (2), and one sides, close to water inlets of the rainwater pipe network (8), of the filter barrels (11) are provided with round grooves (12).
  6. 6. The urban road drainage system based on the sponge urban concept according to claim 2, wherein a liquid level sensor (13) is arranged in the gravel blind ditch (3), a filter screen mechanism (14) is arranged at the communication position of the gravel blind ditch (3) and the guide pipe (4), the filter screen mechanism (14) comprises a connecting frame (15), filter strips (16), movable grooves (17), an extending plate (18), springs (19) and inclined planes (20), the filter strips (16) are arranged on the inner wall of the connecting frame (15), a plurality of groups of filter strips (16) are combined and arranged to form a filter structure, and the movable grooves (17) are arranged on one side of each filter strip (16).
  7. 7. The urban road drainage system based on the sponge urban concept as claimed in claim 6, wherein an extension plate (18) is embedded in the inner cavity of the movable groove (17), one end of the extension plate (18) extends to the outside of the movable groove (17), the extension plate (18) is slidably connected with the movable groove (17), springs (19) are connected with the inner wall of the movable groove (17) in an arrayed manner, one end, far away from the inner wall of the movable groove (17), of each spring (19) is connected with the extension plate (18), and an inclined surface (20) is arranged on one side surface, far away from the springs (19), of each extension plate (18).
  8. 8. The urban road drainage system based on the sponge urban concept as claimed in claim 1, wherein a waterproof impermeable layer (21) is further paved between the thick graded gravel layer (102) and the foundation mat layer (101), and the edge of the waterproof impermeable layer (21) extends upwards.
  9. 9. The urban road drainage system based on the sponge urban concept of claim 8, wherein the thick graded crushed stone layer (102) is an aquifer, and the thick graded crushed stone layer (102) is paved by interspersed cobbles.
  10. 10. The urban road drainage system based on the sponge urban concept as claimed in claim 6, wherein the top surface of the permeable substrate (503) of the permeable pavement structure (5) is provided with a transverse gradient, and the gradient points to the direction of the gravel blind ditch (3).

Description

Urban road drainage system based on sponge city idea Technical Field The application relates to the technical field of road drainage, in particular to an urban road drainage system based on a sponge city concept. Background The sponge city is like a sponge, has good elasticity in the aspects of adapting to environmental changes, coping with natural disasters and the like, absorbs water, stores water, permeates water and purifies water when raining, releases and utilizes the stored water when needed, and improves the utilization rate of the rainwater; At present, the traditional urban road drainage system mainly adopts gray infrastructure, namely, uses facilities such as a rain inlet, a pipeline and a pump station as the core, aims to quickly and intensively drain rainwater from the city, has huge pressure when facing extreme weather, cannot realize resource utilization and pollution control on the rainwater, has difficulty in meeting the requirements of sustainable development of modern cities, and a filter layer or a filter screen arranged in the system effectively intercepts pollutants and has the risk of being blocked, particularly when the concentration of the pollutants is high in the early stage of rainfall, the filter screen with the traditional fixed aperture is easily and quickly blocked by suspended matters, so that the filtering efficiency is reduced, drainage is blocked, bottlenecks are formed, and the drainage capacity of the system in a critical period is affected; Therefore, an urban road drainage system based on a sponge city concept is provided for the problems. Disclosure of Invention In order to overcome the defects in the prior art, the application provides an urban road drainage system based on a sponge city concept, so as to solve the problems in the prior art. In order to achieve the aim, the urban road drainage system based on the sponge urban concept comprises a road body, wherein a rainwater inspection well is arranged in the middle of the road body, a foundation cushion layer, a thick graded gravel layer, a geotechnical cloth filter layer, a thick sand layer, a thick planting soil layer and a permeable layer are arranged at the top of the foundation cushion layer in a laid mode, the geotechnical cloth filter layer is arranged at the top of the thick graded gravel layer in a laid mode, the thick sand layer is arranged at the top of the geotechnical cloth filter layer in a laid mode, the thick planting soil layer is arranged at the top of the thick sand layer in a laid mode, a permeable layer is arranged at the top of the thick planting soil layer in a buried mode, and a gravel blind ditch is communicated with the rainwater inspection well through a honeycomb duct. Preferably, the pavement area on one side of the road body is provided with a water permeable pavement structure, the water permeable pavement structure comprises a water permeable surface layer, a leveling sand filter layer and a water permeable base layer, the bottom of the water permeable surface layer is paved with the leveling sand filter layer, and the bottom of the leveling sand filter layer is paved with the water permeable base layer. Preferably, a diversion blind pipe is arranged below the permeable base layer, a water permeable groove is formed in the top surface of the diversion blind pipe, and the diversion blind pipe is communicated with the gravel blind ditch. Preferably, the rainwater inspection well comprises a shaft, a well cover, an activated carbon adsorption plate and an anti-falling net, wherein the well cover is arranged at the top of the shaft, the activated carbon adsorption plate is arranged at the bottom end of the well cover, and the anti-falling net is arranged on one side, far away from the well cover, of the activated carbon adsorption plate. Preferably, the bottom both sides intercommunication of rainwater inspection shaft has the rainwater pipe network, the bottom both sides of preventing weighing down the net all are provided with fixed pull ring, the bottom of fixed pull ring is connected with the stay cord, the one end that fixed pull ring was kept away from to the stay cord is connected with the filter vat, the filter vat sets up in the bottom of rainwater inspection shaft, just one side that the filter vat is close to the rainwater pipe network water inlet is provided with the circular slot. Preferably, a liquid level sensor is arranged in the gravel blind ditch, a filter screen mechanism is arranged at the communication position of the gravel blind ditch and the flow guide pipe, the filter screen mechanism comprises a connecting frame, filter strips, movable grooves, an extension plate, springs and inclined planes, the filter strips are arranged on the inner wall of the connecting frame, a plurality of groups of filter strips are combined and arranged to form a filter structure, and one side of each filter strip is provided with the movable groove. Preferably, the inner cavity of the