An Insert Type Tunnel Joint Displacement Sensor

A displacement sensor and plug-in technology, which is applied in the direction of instruments, measuring devices, and optical devices, can solve the problems of high durability requirements, wide distribution range, and multiple target positions, and achieve high installation efficiency, good durability, and The effect of a large number of measuring points

Active Publication Date: 2022-06-28
HUBEI SANJIANG AEROSPACE HONGFENG CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the needs of tunnel structural deformation monitoring, focus on solving the problems of multiple target positions, wide distribution range, high durability requirements, and difficult installation in the monitoring of shield tunnel joint displacement displacement

Method used

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  • An Insert Type Tunnel Joint Displacement Sensor
  • An Insert Type Tunnel Joint Displacement Sensor
  • An Insert Type Tunnel Joint Displacement Sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present embodiment will be described in detail below with reference to the accompanying drawings.

[0023] like Figure 1 to Figure 4 A plug-in type tunnel joint displacement sensor shown in the figure includes a distributed strain sensing optical fiber 1, a plurality of groups of plug-ins 2, a fixed base 3, and a trigger pad 4, and the plug-in 2 is installed on the fixed base 3, The fixed base 3 is installed on one side of the tunnel joint 5, the trigger pad 4 is installed on the other side of the tunnel joint 5 relative to the fixed base 3 and the height can be adjusted, and the tip of the insert 2 crosses the tunnel joint. The seam 5 is in contact with the trigger pad 4, the adjacent two groups of inserts 2, the fixed base 3 and the trigger pad 4 are arranged symmetrically with respect to the tunnel joint 5, and the distributed strain sensing optical fiber 4 is symmetrically adhered to the inserts On the front and back sides of 2, multiple groups of inserts 2 ar...

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Abstract

The invention discloses an insert type tunnel joint displacement sensor, which comprises a distributed strain sensing optical fiber and multiple sets of inserts, a fixed base, and a trigger pad, the inserts are installed on the fixed base, and the fixed base is installed on the tunnel joint The trigger pad is installed on the other side of the tunnel joint relative to the fixed base and the height can be adjusted. The tip of the insert crosses the tunnel joint and contacts the trigger pad. Two adjacent sets of inserts, the fixed base and the The trigger block is arranged symmetrically with respect to the dislocation of the tunnel joint, and the distributed strain sensing optical fiber is symmetrically pasted on the front and back sides of the insert, and multiple sets of inserts are connected in series, and the distributed strain sensing optical fiber is connected to the distributed strain solution. Tuner. Based on distributed optical fiber strain sensing technology, the sensor innovatively designed the structure of a new type of displacement sensor for tunnel joint displacement, which has the advantages of high installation efficiency, wide coverage, large number of measuring points, and good durability. A new method is provided to ensure the structural safety of the shield tunnel.

Description

technical field [0001] The invention relates to the technical field of tunnel safety monitoring, in particular to an insert-type tunnel joint displacement sensor. Background technique [0002] For subway shield tunnels, joint staggered deformation is an important part of tunnel structure safety monitoring. Due to the use of concrete segment splicing for construction, segment joints are all over the tunnel. In the design life of up to 100 years, with the combination of various unfavorable factors such as changes in the mechanical environment of the rock and soil around the tunnel, the effect of the cumulative train load, and the performance degradation of the tunnel structure itself, the joints are prone to dislocation deformation. If it is not discovered in time, it will further develop, causing water leakage and increased deformation of the tunnel, threatening the normal use of the tunnel, and even causing the danger of structural collapse. [0003] At present, the commonl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/02G01B11/16
CPCG01B11/02G01B11/16
Inventor 徐金龙李政袁观勇
Owner HUBEI SANJIANG AEROSPACE HONGFENG CONTROL
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