Permeation column test device and method for mud membrane identification of slurry balance shield

CN122108858APending Publication Date: 2026-05-29ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Filing Date
2026-04-30
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing technologies cannot achieve real-time continuous monitoring of mud film status, and permeation column devices cannot capture real-time information on the dynamic formation of mud film. Ground penetrating radar technology lacks effective integration in mud film monitoring, resulting in the inability to meet the requirements for non-destructive and efficient monitoring of mud film status.

Method used

A permeation column test device for identifying mud film in slurry-water balance shield tunneling was designed. Combining an plexiglass cylinder, an air compressor, a pressure gauge, and a ground-penetrating radar detection system, the device achieves non-destructive detection of the mud film formation process by real-time monitoring of medium stratification changes during the permeation process.

Benefits of technology

It achieves uninterrupted radar signal acquisition throughout the entire mud film formation process, obtains the electromagnetic response characteristics of mud film formation, provides continuous raw detection data for mud film evolution, ensures precise control and synchronous recording of mechanical boundary conditions, and establishes a quantitative correlation between radar signal characteristics and mud film physical properties.

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Abstract

The application discloses a kind of mud balance shield mud film identification permeameter test device and method, it is related to geotechnical engineering test field, it includes organic glass cylinder, air compressor, pressure gauge, pore water pressure gauge and ground penetrating radar detection system.The organic glass cylinder forms closed test cavity, air compressor is controlled air pressure to cavity interior by gas pressure regulating valve to drive mud penetration soil sample to generate mud film, and pressure gauge and pore water pressure gauge are used to monitor gas pressure in cavity and internal pore water pressure of medium.Radar antenna of ground penetrating radar detection system is installed in the way of emission surface no gap adhering to the top surface of organic glass cylinder, and the center normal direction is perpendicular to the layered interface of medium in cylinder, electromagnetic wave is vertically incident to obtain the best reflection echo signal.The application integrates ground penetrating radar and permeameter device structure, realizes the real-time nondestructive detection of mud film formation process.
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Citation Information

Patent Citations

  • Slurry balance shield slurry dynamic permeation film-forming test device and determination method

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  • Ground penetrating radar data inversion method and device

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  • Detachable slurry shield slurry film forming and maintenance test device and intelligent evaluation method

    CN121656549A