Groundwater monitoring well device and groundwater sampling method

Abstract

According to a groundwater monitoring well device and a groundwater sampling method in the present invention, the groundwater monitoring well device comprises a plurality of cylindrical well casings and N filter pipes that are connected to each other. A plurality of rectangular partition plates uniformly arranged from the axis to the inner wall on the upper and lower ends of the well casing divides cylindrical space in the well casing into N closed and non-connected first fan-shaped channels. The filter pipe includes a pipe wall upper part, a pipe wall lower part, at least one filter layer wrapped on the pipe wall lower part and a water stop ring. A plurality of rectangular partition plates uniformly arranged from the axis to the inner wall on the upper and lower ends of a pipe body divides cylindrical space in the pipe body into N closed and non-connected second fan-shaped channels. A plurality of through holes arranged on the lower part of the pipe wall corresponding to one of the second fan-shaped channels constitutes a filter fan-shaped body with a closed bottom. The filter fan-shaped body communicates with the first fan-shaped channels and the second first fan-shaped channelscorresponding to the upper part. The water stop ring is made from a water expandable material.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a single-well multi-layer groundwater monitoring well device and a groundwater sampling method for groundwater monitoring in polluted sites. Background technique [0002] At present, when conducting environmental investigations on polluted sites in my country, most groundwater samples are taken by building a groundwater monitoring well and taking a mixed water sample or the groundwater of a certain target layer. It is difficult to accurately know the pollution status of groundwater at different depths of the site. It is very difficult to accurately determine the volume of contaminated groundwater remediation, which affects the formulation of remediation technical plans and the accuracy of remediation construction. Therefore, in order to accurately monitor the site survey, it is possible to install several groundwater monitoring wells at different depths at the s...

AI Technical Summary

Problems solved by technology

These public technologies are mainly used in hydrogeological surveys, and are rarely used in the investigation of groundwater environment in polluted sites; when used in polluted sites, they often fail to meet the requirements of groundwater environmental surveys in polluted sites, which are mainly reflected in the following aspects

First, the main purpose of traditional hydrogeological surveys is water resource issues, and less attention is paid to pollutants in water, and the characteristics of microcosmic, polluting, heterogeneous and complex environmental processes of pollutants are not fully considered. Design, sampling for different pollutants, well cleaning methods, etc. cannot meet the requirements of environmental investigation and restoration

Second, the environmental investigation of polluted sites often has a large workload and a short construction period. The traditional well construction method is relatively complicated, the efficiency of well construction is low, and additional materials such as filter materials are required, and the cost of well construction is high.

Third, polluted land is often faced with follow-up development and utilization. After the completion of traditional well construction, monitoring wells are difficult to remove and remain in place for a long time, causing great inconvenience to the subsequent reuse of the site.

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