A layered water-permeable and water-purifying plant-growing retaining wall and its construction method

Abstract

The invention discloses a layered water-permeable water-purifying vegetation retaining wall and a construction method thereof. The layered water-permeable water-purifying vegetation retaining wall comprises an upper retaining structure and a lower retaining structure; a purifying tank is arranged on the top of the upper retaining structure, a plurality of planting tanks are arranged on the outer side of the upper retaining structure, a drainage layer is arranged on the inner side of the upper retaining structure, and a plurality of protrusions are arranged at the bottom of the upper retainingstructure; the purifying tank is filled with a purifying material of which the height at least accounts for three quarters of that of the purifying tank, a planting soil layer is arranged on the upperportion of the purifying material, and water-permeable geotechnical cloth is arranged at the contact sites of the purifying material and the planting soil layer and the upper retaining structure; water-permeable geotechnical cloth is laid in each planting tank, and a scour prevention layer, a planting soil layer and a water retention layer are sequentially arranged from top to bottom; and a plurality of grooves are formed in the top of the lower retaining structure, a gravel layer is arranged at the bottom of the lower retaining structure, and piled stones are arranged on the outer side of the lower retaining structure. According to the layered water-permeable water-purifying vegetation retaining wall and the construction method thereof, by adopting the layered design, not only can urbanenvironment be afforested and beautified, but also pollutants in rainwater can be purified and absorbed, and effective combination of a landscape function and an urban non-point source pollution control function is achieved.

Description

technical field [0001] The invention belongs to the technical field of ecological river course construction, and in particular relates to a layered water-permeable water-purifying plant-growing retaining wall and a construction method thereof. Background technique [0002] Sponge city refers to a city that can be like a sponge and has good flexibility in adapting to environmental changes and responding to natural disasters. When it rains, it absorbs, stores, infiltrates, and purifies water, and releases and utilizes the stored water when needed. Sponge city construction should follow the principles of ecological priority, combine natural approaches with artificial measures, and ensure the safety of urban drainage and waterlogging, maximize the accumulation, infiltration and purification of rainwater in urban areas, and promote the utilization of rainwater resources and ecological environment protection. Sponge city, as a path to restore urban water ecology, can realize wate...

AI Technical Summary

Problems solved by technology

[0005] At present, in the face of the continuous demand for sponge city construction, conventional planting retaining walls have many shortcomings. Generally, only the role of water and soil conservation and landscape greening are considered, and the functional requirements of water permeability and water purification in sponge city construction are not fully considered. , it is impossible to connect the functions of water permeability, water purification and landscape, and it cannot fully purify the pollutants in the rainwater

However, natural rainwater often carries a large amount of domestic garbage and other pollutants on the ground. After unpurified rainwater is discharged into natural rivers, it will aggravate the pollution of natural water bodies.

To sum up, it can be seen that the traditional vegetation retaining wall can no longer meet the needs of sponge city construction. Therefore, it is necessary to combine the concepts of natural accumulation, natural infiltration and natural purification of sponge city to develop a greening and beautifying urban environment, and It can also purify rainwater and absorb pollutants in rainwater, so as to realize the landscape function of sponge city and the comprehensive functional vegetation retaining wall structure of urban non-point source pollution control

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