A paddy field underground invisible reservoir for sponge city and its construction method

Abstract

The invention discloses a paddy field underground stealthy reservoir for a sponge city and a construction method of the paddy field underground stealthy reservoir. The underground stealthy reservoir comprises a foundation course and an air-permeable and anti-seepage course, wherein a filtering wall bodies are arranged around the air-permeable and anti-seepage course; a water storage space is formed between the filtering wall bodies; a honeycombed structure is arranged in the water storage space; the honeycombed structure is formed by building silica sand bricks; the higher side of the water storage space is provided with a distribution well and the lower side of the water storage space is provided with a negative well; a concrete cover plate is arranged on the surfaces of the honeycombed structure, the distribution well and the negative well; and a paddy field mud return course is arranged on the concrete cover plate. The construction method sequentially comprises the following steps: getting preparation for construction, excavating a foundation pit, paving the foundation course, paving the air-permeable and anti-seepage course, paving the honeycombed structure, building the distribution well and the negative well and conducting earthing-up and back-filling. The paddy field underground stealthy reservoir can achieve water absorption, water storage, water seepage and water purification in rainy days, and the stored water, when required, can be 'released' and used, so that the resource utilization and ecological environment protection of the rainwater are promoted.

Description

technical field [0001] The invention relates to the field of sponge city construction, in particular to an underground invisible reservoir for paddy fields used in a sponge city and a construction method thereof. Background technique [0002] In recent years, waterlogging every time it rains has gradually become a chronic problem in many cities. "At present, many cities adopt the fast drainage mode. The rainwater falls on the hardened ground and can only be drained quickly from the pipes. This mode makes 70% of the rainwater in the city go to waste." If most of the rainwater is retained instead of drained away , can maximize the accumulation, infiltration and purification of rainwater in the urban area, and promote the utilization of rainwater resources and the protection of the ecological environment. In other words, the "sponge city" is expected to digest the large amount of water originally discharged to the end of the pipes and canals through absorption, storage, infilt...

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Problems solved by technology

[0004] However, the traditional urban construction model is full of hardened roads

Whenever there is heavy rain, it mainly relies on "grey" facilities such as pipes, canals, and pump stations to drain water. The main planning and design concepts are "quick drainage" and "end-centralized" control. Rainwater is mainly drained through drainage facilities and cannot penetrate into the ground. It will cause waterlogging every time it rains, and the drought and flood will turn sharply, which does not meet the requirements of sponge city construction

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