Water filtering pipe, underground water monitoring well device and construction method

Abstract

The invention discloses a water filtering pipe, an underground water monitoring well device and a construction method. The water filtering pipe is arranged at the bottom of an underground water sampling well, and comprises a pipe body, at least one filtering layer and a water stopping ring; the pipe body is provided with an upper pipe wall part and a lower pipe wall part; a plurality of through holes are formed in the lower pipe wall part; the at least one filtering layer wraps the lower pipe wall part; the water stopping ring surrounds the upper pipe wall part; the sizes of the filtering holes in the filtering layer are smaller than those of the through holes; and the water stopping ring is made of a material which expands with water. As the water filtering pipe is arranged at the bottomof the underground water sampling well and is used for detecting the water quality of the underground water of a specific stratum; the water filtering pipe is provided with at least one filtering layer which wraps the pipe body and is used for filtering soil particles and suspended matters, so that the space between the water filtering pipe and the wall of the well is not filled with a filtering layer; therefore the materials are saved; the transportation labour cost is reduced; and moreover, the used underground water well is also removed very conveniently so as not to affect subsequent development work of a site.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a novel water filter pipe, a groundwater monitoring well device and a construction method. Background technique [0002] With the rapid development of site environmental investigation, groundwater environmental investigation and restoration, the construction efficiency, technical requirements and economical efficiency of groundwater monitoring wells and extraction wells are getting higher and higher. [0003] The traditional well construction method is generally to drill the well first to obtain the well hole, then place the well pipe and the water filter pipe, then fill the filter layer between the water screen pipe and the well wall, fill the sealing layer between the well pipe and the well wall, and finally install the wellhead protection cover , to complete the construction of the well. [0004] In the investigation and remediation of polluted sites and gr...

AI Technical Summary

Problems solved by technology

[0004] In the investigation and remediation of polluted sites and groundwater environments, due to the large number of wells, short working hours, and many specific requirements, the above-mentioned well construction method has relatively low work efficiency, and because the well construction requires the use of filter layer filter materials, the operation is relatively complicated , the cost of well construction is also high; in addition, the monitoring wells of the traditional well construction method have been left in the site, and it is difficult to remove, which has a negative impact on the subsequent use of the site when the number is large

[0005] Patent CN107816083A discloses an underground filter layer module. The filter layer is filled between the inner filter screen and the outer filter screen arranged on the fixed frame, so that a dense and regular filter layer can be formed around the permeable well pipe of the water well, and the filter layer can be avoided. Disadvantages of entering sediment waste water wells caused by layer shift

The downhole filter layer module of this patent not only has slow well construction efficiency, but also needs to excavate a large diameter hole

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