Water injection well

Abstract

The invention relates to a building apparatus for a water injection well. The water injection well built with the apparatus of the invention is composed of an intake well body, a pipeline, a fixed layer, an expanded filter layer, a burying area and so on. When treating the expanded filter layer built with the apparatus of the invention, a base bottom layer is arranged at the undermost part; the quartz sands at the bottom layer are filled in the water injection well with the apparatus; the size of the expanded filter layer is gradually reduced from the bottom up. The filter layer is also filled by the apparatus with the size gradually increased from the bottom up. Rain water after the treatment of a sand filter enters the expanded filter layer from the pipeline to be filtered again and then fast seeps underground, in this way, the aims of increasing ground water and enriching ground water resource are achieved. The building apparatus for a fast seepage well is applicable for building awater injection well requiring fast rain water seepage.

Description

water injection well technical field The invention belongs to a rainwater filtering infiltration device. In particular, injection wells provided with extended filter layers. Background technique The water injection well is a simple and practical device for injecting water into the ground. The basic structure of a traditional water injection well is: a well body is drilled with a well drilling machine, a PVC pipe is buried in the well body, and gravel is filled in the periphery, or the well is protected with steel pipes and concrete. It is used to infiltrate the surface to collect confluent rainwater during the rainy season, conserve groundwater, reduce the pressure of waterlogging caused by difficult drainage in cities or regions, eliminate flood peaks, and reduce flood disasters in rainy seasons. There are several problems in traditional water injection wells: 1. The filtration area is small and the infiltration speed is slow, which makes it difficult to meet the purpo...

AI Technical Summary

Problems solved by technology

There are several problems in traditional water injection wells: 1. The filtration area is small and the infiltration speed is slow, which is difficult to meet the purpose of rapid infiltration of rainwater in the rainy season

2. The dirt-holding capacity is small and the service life is low. Generally, after 1 to 2 years of water seepage, it is difficult to meet the original design water seepage requirements

3. Rainwater filtration may not be complete and may pollute the groundwater layer

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