A device and method for testing the plugging mechanism of a pressure-reducing well under bidirectional and alternating clear and turbid flow conditions

By designing a test device for the clogging mechanism of pressure relief wells under the conditions of two-way alternating clear and turbid flow, the problem of the inability to achieve clean water backwashing and modular testing in the existing technology was solved, the quantitative analysis and prediction of the clogging mechanism was achieved, and the flood prevention and disaster reduction efficiency of the pressure relief well was improved.

CN119492670BActive Publication Date: 2025-10-17CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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Patent Information

Application Number
CN202411594250.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-09
Publication Date
2025-10-17
Estimated Expiration
2044-11-09

AI Technical Summary

Technical Problem

Existing test equipment and methods cannot achieve the clean water backwashing effect, cannot fully test and quantify the impact of clean water flushing on the filter layer on siltation reduction, cannot achieve modular installation and quantitative analysis of the filter layer, and cannot test the degree of siltation evolution under the alternating action of clean and turbid water.

Method used

A test device for the clogging mechanism of pressure relief wells under conditions of alternating clear and turbid flow was designed. The device includes a test tank, a porous well pipe, a filter layer specimen, and a control valve system. By alternating turbid and clear water, the clogging amount and permeability changes of the filter layer are quantitatively analyzed.

Benefits of technology

The siltation mechanism test and quantitative analysis under the alternating action of clear and turbid water were realized, the siltation evolution process of the pressure relief well filter layer was revealed, the effect and life of the embankment pressure relief well were predicted, and theoretical support was provided for flood control and disaster reduction.

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Abstract

The application provides a device and method for testing the plugging mechanism of a pressure-reducing well under the condition of bidirectional and alternate clear water and turbid water, which comprises a test tank base, a plexiglass tank fixed to the test tank base, a sample bottom support plate arranged at the bottom of the plexiglass tank, a multi-hole well pipe installed on the sample bottom support plate, a filter layer fixing frame installed on the outer wall of the multi-hole well pipe, and a filter layer sample fixed in the filter layer fixing frame. The filter layer sample is divided into at least three parts by a partition slot. The sample bottom support plate is supported on the test tank base by a bottom support plate annular support, and a bottom water tank is formed between the sample bottom support plate and the test tank base. The bottom water tank is connected to clear water through a bottom water inlet pipe. The top of the multi-hole well pipe is covered by a sample cover plate, and the top of the plexiglass tank is covered by a top fixed cover. A top turbid water tank is formed between the sample cover plate and the top fixed cover, and the top turbid water tank is used for connecting to turbid water. The application can realize the test and quantitative analysis of the plugging evolution process of the filter layer of the pressure-reducing well.
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