Modularized single-well and multilayered identification and sampling system for underground water

Abstract

The invention relates to a modularized single-well and multilayered identification and sampling system for underground water. The modularized single-well and multilayered identification and sampling system comprises at least two sampling modules which are mounted in sequence from bottom to top; each sampling module comprises a main pipe and a secondary pipe which is arranged in the main pipe; each main pipe comprises a slotting main pipe, a water stopping main pipe and a main pipe blind pipe; each slotting main pipe is provided with a slot and a water absorption expansion material covers the outer part of each water stopping main pipe; each secondary pipe comprises a secondary pipe filter pipe and a secondary pipe blind pipe; each secondary pipe filter pipe is provided with a filtering seam; a lower blocking layer, each secondary pipe filter pipe and an upper blocking layer are mounted in the corresponding slotting main pipe in sequence from bottom to top; each secondary pipe filter pipe is located at the position of the corresponding slot; a cavity formed by each secondary pipe filter pipe, each slotting main pipe, each lower blocking layer and each upper blocking layer is filled with filtering materials; the upper end of each secondary pipe filter pipe is connected with the corresponding secondary pipe blind pipe; each secondary pipe blind pipe extends upward to the top of the main pipe blind pipe of the sampling module at the uppermost end. According to the modularized single-well and multilayered identification and sampling system for the underground water, the sampling modules are mounted layer by layer by adopting a direct penetration method and penetration and cross flow between water-bearing layers can be effectively avoided; the modularized single-well and multilayered identification and sampling system is convenient and rapid to mount.

Description

technical field [0001] The invention relates to the technical field of groundwater identification and sampling systems, in particular to a modular groundwater single-well multi-layer identification and sampling system. It meets the requirements of collecting groundwater pollution samples at different depths in a single well, and achieves the purpose of distinguishing different degrees and scopes of groundwater pollution. Background technique [0002] Groundwater monitoring well is a commonly used engineering method for site groundwater environment assessment. It is an important measure to grasp the dynamic change characteristics of groundwater, evaluate groundwater resources, investigate groundwater pollution, and carry out groundwater monitoring. Groundwater monitoring wells provide a sample collection platform for groundwater analysis and testing. The structure and quality of groundwater monitoring wells determine the data stability, relevance and integrity of groundwater ...

AI Technical Summary

Problems solved by technology

Most of the above-mentioned single-well multi-layer sampling wells use the traditional construction method of forming holes and then inserting well pipes. Although they are suitable for industries such as water level monitoring and hydrogeological parameter determination, they are not suitable for complex groundwater pollution types and small-scale pollution. When identifying the vertical pollution distribution of the field, it is often due to the long drilling time during the drilling process, the cross-contamination of aquifer pollutants, and the groundwater in the upper aquifer after the well is flowed into the lower aquifer along the borehole wall. Mixing with the groundwater in the lower aquifer makes it difficult to identify the depth of the pollution and cause misjudgment of the investigation results; secondly, during the construction of a single-well multi-layer monitoring well, due to the limitation of the tube well, the well tubes in the single hole may be dense, especially in the upper layer. The large number of well pipes in the hole in the aquifer and the narrow space between the well pipes lead to poor filling of the plugging filler, and the groundwater between the aquifers flows through the borehole, causing pollutants to penetrate between the aquifers, making it difficult to distinguish the aquifers Layer water quality, water level and other parameters; thirdly, if the phenomenon of penetration and flow occurs during the investigation stage, the pollutants in the upper layer will spread vertically to deeper layers, resulting in the risk of expanding the scope and degree of pollution.

Therefore, whether the above-mentioned technologies are well-forming techniques or actual construction, they may cause problems such as underground cross-contamination of pollutants, determination of the pollution depth, or difficulties in actual construction, which in turn makes it difficult to clarify pollution responsibilities, and it is difficult to carry out follow-up remediation and improvement of contaminated sites.

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