An in-service immersed tube tunnel segment posture monitoring device

The monitoring device, which combines gratings and photoelectric detectors, solves the problems of insufficient synchronous acquisition and accuracy of three-dimensional displacement in the attitude monitoring of immersed tunnel segments, and achieves efficient and accurate attitude monitoring.

CN224517769UActive Publication Date: 2026-07-17SHANGHAI JIAOTONG MARINE TECH CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI JIAOTONG MARINE TECH CO LTD
Filing Date
2025-06-27
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies cannot simultaneously acquire three-dimensional displacement when monitoring the attitude of immersed tunnel segments. The measurement accuracy is insufficient and the efficiency is low. The data is fragmented and difficult to trace, resulting in inaccurate monitoring results.

Method used

The monitoring device, which combines a grating and a photodetector, calculates the absolute tilt angle change by optical path offset and outputs absolute attitude parameters by combining photoelectric displacement data with the coordinates of the reference point of the buried section.

Benefits of technology

It achieves high-precision, synchronous acquisition of the three-dimensional displacement of immersed tunnel segments, improving monitoring efficiency and ensuring the accuracy and consistency of measurement results.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The utility model belongs to pipeline monitoring technical field especially is a kind of in-service immersed tube tunnel pipe joint attitude monitoring device, including tunnel immersed tube and grating, the connecting place bolt mounting of tunnel immersed tube has immersed tube pipe joint, the lateral wall in the tunnel immersed tube is equipped with grating, the both sides of immersed tube pipe joint are equipped with photoelectric detector;The both sides outside grating are equipped with telescopic stake, the inner side of telescopic stake is connected with limit sleeve;The application can capture joint mark point reflection light signal by photoelectric detector, when pipe joint occurs relative displacement, light path offset generates phase difference, grating monitoring pipe joint body strain, can calculate absolute inclination variation by wavelength offset amount, fusion photoelectric displacement data and dark buried section reference point coordinate, can output absolute attitude parameter, prevent prior art using inclinometer only can detect local inclination, cannot synchronously obtain three-dimensional displacement, level gauge efficiency is lower, and it is easy to lead to the problem of the shortage of measurement accuracy.
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Claims

1. An in-service immersed tunnel segment attitude monitoring device, comprising a tunnel immersed tube (1) and a grating (3), characterized in that: The tunnel section (1) is bolted to the connection point of the tunnel section (1), the tunnel section (1) is equipped with a grating (3) on the inner side wall, and photoelectric detectors (4) are installed on both sides of the tunnel section (2). Telescopic pins (5) are installed on both sides of the grating (3), and a limit sleeve (6) is connected to the inner side of the telescopic pins (5).

2. The in-service immersed tunnel segment attitude monitoring device according to claim 1, characterized in that: The gratings (3) are symmetrical to each other, and two sets of gratings (3) are installed inside the tunnel tube (1).

3. The in-service immersed tunnel segment attitude monitoring device according to claim 1, characterized in that: The photodetector (4) is provided in two groups, and each group of photodetectors (4) is provided with four.

4. The in-service immersed tunnel segment attitude monitoring device according to claim 1, characterized in that: A positioning block (7) is fixed in the middle of one end of the limiting sleeve (6), and the positioning block (7) is connected to the tunnel submerged tube (1) by bolts.

5. The in-service immersed tunnel segment attitude monitoring device according to claim 1, characterized in that: The telescopic pin (5) engages with the grating (3), and the telescopic pin (5) and the limiting sleeve (6) form a telescopic structure.

6. The in-service immersed tunnel segment attitude monitoring device according to claim 1, characterized in that: Fixing bolts (8) are installed on both sides of the connection between the limiting sleeve (6) and the telescopic pin (5).