A scalable formation deformation monitoring device

CN117419655BActive Publication Date: 2026-07-07CHINA RAILWAY FIFTH BUREAU GRP SOUTH CHINA ENG CO LTD +4
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA RAILWAY FIFTH BUREAU GRP SOUTH CHINA ENG CO LTD
Filing Date
2023-11-20
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

After long-term use, existing online geostress monitoring devices suffer from fiber optic deformation, which affects monitoring accuracy. They are also susceptible to complex geological stress, humid air, and electromagnetic interference, resulting in a short service life and a complicated replacement process.

Method used

A scalable formation deformation monitoring device is designed, which adopts an optical fiber sheath body and anchor structure. The measuring section optical fiber is replaced by non-measuring section optical fiber. Combined with telescopic plug-in fixing component and adjustment component, the optical fiber sheath is tightly coupled with the formation and the accurate monitoring is achieved.

Benefits of technology

It extends the service life of the monitoring device, improves monitoring accuracy and simplifies the replacement process, avoids structural damage and interference, and ensures accurate monitoring of formation deformation.

✦ Generated by Eureka AI based on patent content.

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    Figure CN117419655B_ABST
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Abstract

The application discloses a telescopic stratum deformation monitoring device, which is applied to the technical field of stratum deformation monitoring devices and has the technical scheme as follows: a fiber sleeve main body is provided with a sinking pile head fixedly arranged at one end; a full-distributed stress optical fiber for monitoring the stress change of stratum subsidence is arranged in the fiber sleeve main body; the full-distributed stress optical fiber in the fiber sleeve main body is a measuring section optical fiber; a non-measuring section optical fiber is reserved at the end of the full-distributed stress optical fiber away from the sinking pile head; anchor pieces for fixing the first end and the last end of the measuring section optical fiber are fixedly arranged at the two ends of the fiber sleeve main body along the axial direction; and a group of monitoring points for monitoring the stress change of the fiber sleeve main body are symmetrically arranged on the measuring section optical fiber. The application has the technical effect that the service life of the monitoring device is greatly prolonged, and the replacement process is simple.
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