Biologicalpurificationretention belt for sponge-type city municipal road and construction method of biologicalpurificationretention belt

Abstract

The invention discloses a biologicalpurificationretention belt for a sponge-type city municipal road and a construction method of the biologicalpurificationretention belt. The biologicalpurificationretention beltcomprises waterproof geotechnical cloth, a rubble water purification layer, water-permeablegeotechnical cloth, an improved soil water purification layer, an antiscouring layer, an overflow well, a water collection pipe and a transverse connection pipe which are sequentially arranged in an isolation belt of the sponge-type city municipal road from bottom to top, wherein the overflow well is arranged in the center of the isolation belt; the water collection pipe is arranged in the rubble water purification layer in the longitudinal direction of the sponge-type city municipal road; the transverse connection pipe communicates with the bottom of the overflow well; the overflow well penetrates through the waterproof geotechnical cloth, the rubble water purification layer, the water-permeablegeotechnical cloth, the improved soil water purification layer and the antiscouring layer, and communicates with the water collection pipe; and the transverse connection pipe is arranged in the transverse direction of the sponge-type city municipal road. The biologicalpurificationretention belthas the water drainage, water permeation, water retention, water storage and water purification functions, can be used for municipal roads and arterial highways around cities, enables municipal roadsto be changed into sponge-type city municipal roads, and promotes the development of sponge-type cities.

Description

technical field [0001] The invention relates to a municipal road biological purification retention zone and a construction method thereof, which can be applied to the construction of sponge city municipal roads and belongs to the field of road engineering. Background technique [0002] Sponge city is a new concept of urban construction proposed by the state. The Ministry of Housing and Urban-Rural Development requires that by 2020, more than 20% of the urban built-up area will meet the target requirements, and by 2030, more than 80% of the area will meet the target requirements. It can be seen from this that the country urgently needs to improve the living environment of residents and the urban water environment. The sponge city requires the city to have the functions of infiltration, stagnation, storage, purification, utilization and drainage when it rains. The proportion of road pavement in the whole city is about 30%, and there are problems of runoff pollution and water ...

AI Technical Summary

Problems solved by technology

Corresponding to the sponge city municipal roads are low-impact roads. In the design of low-impact roads at home and abroad, the requirements for drainage pavement, open side stones, and concave green belts are put forward to realize the function of road drainage, but not Realize the functions of water seepage, water storage, water purification and stagnant water

The invention patent "An Ecological Filter Ditch and Its Design Method" discloses an ecological filter ditch that relies on the filtering effect of planting soil and gravel to reduce urban road runoff pollution. Obviously, the cutting ability of planting soil and gravel is limited and can only Filter large particle size pollutants

Zhenjiang City, a pilot city for sponge cities in Jiangsu Province, is a model city for the construction of sponge cities in China. In the construction of municipal roads in sponge cities, Zhenjiang adopted drainage asphalt pavement, open side stones, sunken green belts, and overflow wells. Problems in aspects: (1) Rainwater runoff from road surfaces directly enters the drainage pipe network, which cannot be purified and stored; (2) Water resources are wasted and cannot be used

(3) The overflow well is at the same elevation as the ground surface, and the rainwater enters the green belt directly into the overflow well, which can easily cause the overflow well to be blocked, and at the same time, the green belt cannot play the role of water stagnation, water storage, and water seepage

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