Water level observation well structure for confined water and multi-layer water level observation method

Abstract

The invention relates to a water level observation well structure for confined water and a multi-layer water level observation method. The water level observation well structure consists of an observation hole and a well tube arranged outside the observation hole, wherein the observation hole is cored into a confined water-bearing layer; the well tube is arranged in a water check layer above the confined water-bearing layer, so that the water level in the confined water-bearing layer can be observed; and when needing to observe the water level of another confined water-bearing layer below, a worker only needs to continuously drill a hole in the observation hole to reach the confined water-bearing layer below, and inserts a second confined water-bearing layer water level observation well tube between the observation hole and the well tube. According to the water level observation well structure for the confined water and the multi-layer water level observation method, the worker can observe water level elevations of two or more layers of confined water in the observation well; no filter and no clay balls are needed to be backfilled into the side wall of the well tube, so that the engineering manufacturing cost is reduced; and no filter tube is needed to be manufactured, so that the influence on a water level observation result due to the mud in the hole is reduced.

Description

technical field [0001] The present invention relates to the fields of engineering geological survey and hydrogeological survey, in particular to a confined water level observation well structure and multi-layer water level observation method for obtaining the underground confined water level, mainly used for ascertaining the hydrogeological conditions of the site, Provide parameters for foundation pit anti-surge check calculation. Background technique [0002] When carrying out engineering geological surveys and hydrogeological surveys in various engineering projects, involving excavation of foundation pits, it is necessary to find out the elevation of the confined water level and pressure head in the site, and provide parameters for the anti-surge check calculation of foundation pits. The elevation of the confined water level and the pressure head of the site are generally obtained by the following methods: [0003] Well position measurement→drilling rig to form a hole→wel...

AI Technical Summary

Problems solved by technology

Once a large number of clay particles in the mud adhere to the filter pipe of the well pipe, the well pipe will be blocked and the water level observation results will be distorted

[0007] The utility model patent "Multilayer Water Level Observation Well Structure" with the publication number CN204941526U discloses a water level observation well structure suitable for simultaneous observation of multiple layers of water layers in narrow and small places. Multi-layer water levels can be measured, but the observation of the lower water level is by embedding sensors, which is cumbersome and the accuracy of water level measurement is not high; and the upper water level measurement still uses the filter tube, which still cannot solve the problem of filter tube blockage question

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