Municipal administration road rainwater reuse facility based on bioretention zone system

A technology of biological retention and municipal roads, applied in the field of rainwater reuse facilities on municipal roads, can solve the problems of affecting the time of rainwater discharge and not fully considering the influence of drainage time of pavement structure, so as to shorten the seepage time, increase the slope, increase the Effect of large seepage area

Inactive Publication Date: 2019-12-03
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can collect and reuse rainwater, it does not fully consider the impact of the pavement structure on the drainage time, and the excessive height of the earth retaining board described in the invention will also affect the time of rainwater discharge

Method used

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  • Municipal administration road rainwater reuse facility based on bioretention zone system
  • Municipal administration road rainwater reuse facility based on bioretention zone system
  • Municipal administration road rainwater reuse facility based on bioretention zone system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: dealing with rainwater runoff when the rainfall is 35mm. The design rainfall is 35mm, the design rainfall return period is 1a, and the rainfall time is 1h. The calculated average rainfall intensity is 35mm·h-1. The rainwater flows to the biological retention zone through the "V"-shaped road, and the measured rainwater runoff discharge Within 1 hour, there will be no water accumulation on the road. After entering the bioretention zone, the runoff rainwater passes through the planting soil layer, artificial packing layer, and gravel layer in sequence, reaches the perforated pipe, and finally enters the storage tank. It is measured that the removal rate of N by the bioretention belt system is above 70%, the removal rate of P is above 85%, and the average removal rate of Cu, Pb, Zn, and Cd is above 60%. Every 100m of the bioretention belt system The water storage capacity is 55m3.

Embodiment 2

[0030] Embodiment 2: dealing with rainwater runoff when the rainfall is 71 mm. The design rainfall is 35mm, the design rainfall return period is 5a, and the rainfall time is 1h. The calculated average rainfall intensity is 35mm h-1. The rainwater flows to the bioretention zone 2 through the "V"-shaped road, and the rainwater runoff is measured The discharge time is within 1 hour, and there will be no road accumulation. After entering the bioretention zone, the runoff rainwater passes through the planting soil layer 5 , the artificial packing layer 6 , and the gravel layer 7 in sequence, reaches the perforated pipe 8 , and finally enters the reservoir 11 . It is measured that the removal rate of N by the bioretention belt system is above 70%, the removal rate of P is above 85%, and the average removal rate of Cu, Pb, Zn, and Cd is above 60%. Every 100m of the bioretention belt system The water storage capacity is 55m3.

Embodiment 3

[0031]Embodiment 3: dealing with rainwater runoff when the rainfall is 71mm. The design rainfall is 71 mm, the design rainfall return period is 5 years, and the rainfall time is 2 hours. The calculated average rainfall intensity is 71 mm h-1, and the rainwater flows to the bioretention zone 2 through the "V"-shaped road, and the rainwater runoff is measured The discharge time is within 2 hours, and there will be no road accumulation. After entering the bioretention zone, the runoff rainwater passes through the planting soil layer 5 , the artificial packing layer 6 , and the gravel layer 7 in sequence, reaches the perforated pipe 8 , and finally enters the reservoir 11 . It is measured that the removal rate of N by the bioretention belt system is above 70%, the removal rate of P is above 85%, and the average removal rate of Cu, Pb, Zn, and Cd is above 60%. Every 100m of the bioretention belt system The water storage capacity is 100m3.

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Abstract

The invention discloses a municipal administration road rainwater reuse facility based on a bioretention zone system. Through the gradient of a cross slope of a V-type pavement, rainwater runoff on the both sides of a road is aggregated into a bioretention zone, so that the rainwater discharge time is shortened to a certain extent; then absorption of pollutants by plant roots, removal of rainwaterrunoff suspended solids (SS) by the planting soil layer and removal of nitrogen and phosphorus by microorganisms in the planting soil layer are carried out after rainwater enters the bioretention zone, then the rainwater enters an artificial filler layer, and the pollutants are further removed in the artificial filler layer; and the rainwater reaches a gravel layer and is drained into a perforated drainage pipe through the gravel layer to enter an impounding reservoir. The device achieves adjustment of the pavement structure, treatment of the pollutants in the rainwater runoff entering the bioretention zone and storage of rainwater, so that the problem of water shortage is alleviated to a certain extent.

Description

technical field [0001] The invention relates to the technical field of drainage facilities, in particular to a municipal road rainwater reuse facility based on a biological retention belt system. Background technique [0002] Bioretention zone facilities refer to facilities that store infiltration and purify runoff rainwater through plants, soil and microbial systems in low-lying areas. At this stage, with the rapid urbanization of cities, urban problems such as waterlogging disasters, rainwater runoff pollution, water resource shortages, and ecological environment have become increasingly prominent. The data shows that as an important part of urban space, municipal roads play a vital role in urban construction. At present, the greening facilities attached to urban roads are mainly ordinary green isolation belts, and the rainwater discharge is aimed at collecting rainwater to the pipeline system as soon as possible, and quickly discharging it after collection, while ignorin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E03F1/00E03F5/10E01C11/22A01G22/00
CPCA01G22/00E01C11/224E03F1/00E03F5/10E03F5/101Y02A30/60
Inventor 张惠宁刘泳利张登启付万隆杨柳崴罗振华胡家玮杨亚红尹鑫王梦娇马杰
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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