Device for monitoring water pressure of hole around pile in resonance-free construction process of steel casing

By designing a pore water pressure device for monitoring the resonance-free construction of steel casing, the problem of easy damage to the pore pressure gauge and cable during construction is solved, and accurate monitoring and analysis of soil pore water pressure and foundation bearing capacity recovery is achieved.

CN222632240UActive Publication Date: 2025-03-18SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING (GROUP) CO LTD
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Patent Information

Application Number
CN202420718723.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-09
Publication Date
2025-03-18
Estimated Expiration
2034-04-09

AI Technical Summary

Technical Problem

During the construction of high-frequency resonance-free sinking method, the vibration sinking of steel casing or steel pipe piles can easily cause damage to the pile body hole pressure gauge, and the pipeline connecting the hole pressure gauge is easily damaged by soil friction, resulting in inaccurate monitoring data.

Method used

A monitoring device including a cable protective sleeve, a hole pressure gauge protector, a wire device, a strained micro-hole pressure sensor and an automated digital instrument are designed. The hole pressure gauge protector is set under the cable protective cover, and the strain-type micro hole pressure sensor is installed in the hole pressure protection device. The wire guide connects the cable through a cable threader and a wire roller to protect the cable and avoid friction with the soil.

Benefits of technology

The hole pressure gauge and cable are effectively protected, the accuracy of monitoring data is ensured, and the dissipation of soil pore water pressure and the recovery of the bearing capacity of the foundation soil are analyzed, providing a scientific basis for the construction of resonance-free sinking steel casing.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model relates to a device for monitoring the water pressure of a hole around a pile in the resonance-free construction process of a steel casing, which comprises a cable protection sleeve shell, a pore pressure meter protector, a wire guide, a strain type miniature pore pressure sensor and an automatic data acquisition instrument, the cable protection sleeve shell is composed of equilateral angle steel, the equilateral angle steel is welded on the steel casing, and the strain type miniature pore pressure sensor is connected with the cable protection sleeve shell. The pore pressure meter protector is arranged below the cable protection sleeve shell, the strain type miniature pore pressure sensor is installed inside the pore pressure protection device, the strain type miniature pore pressure sensor is connected with the automatic data acquisition instrument through a cable, and the cable penetrates through the cable protection sleeve shell and is connected with the wire guiding device. The utility model has the advantages that the pore pressure meter can be protected when the steel casing vibrates and sinks; damage caused by friction between the cable and the soil body is avoided, and the soil body pore water pressure dissipation condition and the bearing capacity recovery condition of the foundation soil body are analyzed; the powerful support is provided for researching the influence rule of resonance-free sinking steel casing construction on the pore water pressure of the contact surface of the steel casing and the soil body.
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