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Tunnel supporting structure stress monitoring device and method

A force monitoring and supporting structure technology, applied in mining equipment, earthwork drilling, mining equipment, etc., can solve problems affecting the accuracy of calculation results, increasing deviation, and limited calculation and analysis level of monitoring results, etc.

Inactive Publication Date: 2016-02-17
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the current research on tunnel construction mechanics, the basic data mostly come from the displacement monitoring of the structure surface. For the stress state of the support structure, the contact stress between the support structure and the surrounding rock, the secondary lining and the primary support, the back analysis is the main method. deviation from the actual result
As for the monitoring method of geotechnical instruments, the embedding experience of the instrument manufacturer is mostly based, and the calculation and analysis level of the monitoring results by the instrument manufacturer is limited, which affects the accuracy of the calculation results

Method used

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  • Tunnel supporting structure stress monitoring device and method
  • Tunnel supporting structure stress monitoring device and method

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Embodiment

[0046] Such as Figure 1~5 As shown, a tunnel support structure force monitoring device includes a primary support force monitoring unit and a secondary lining force monitoring unit.

[0047] The primary support force monitoring unit includes a steel bar strain gauge 11 , a first earth pressure gauge 12 , a first concrete strain gauge 13 and a surface strain gauge 14 . Such as figure 2As shown, the section steel for the initial support is "I" type, and two surface strain gauges 14 are arranged on each section steel, and the two surface strain gauges 14 are symmetrically arranged inside the two wing plates of the section steel for monitoring the shape of the section steel wing plate. Tangential strain of the tunnel ring. There are three steel bar strain gauges 11, which are respectively arranged at 1 / 4, 1 / 2, and 3 / 4 of the anchor rods. The first earth pressure gauge 12 is arranged between the primary support and the surrounding rock, buried in the surrounding rock, and perp...

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Abstract

The invention relates to a tunnel supporting structure stress monitoring device and method. The tunnel supporting structure stress monitoring device comprises a reinforcing steel bar strain gauge (11), a first soil pressure gauge (12), a first concrete strain gauge (13), a surface strain gauge (14), a second soil pressure gauge (21) and a second concrete strain gauge (22), wherein the reinforcing steel bar strain gauge (11) monitors anchor rod strain, the first soil pressure gauge (12) monitors the contact pressure between a primary supporting and surrounding rock, the first concrete strain gauge (13) monitors the annular strain of sprayed concrete, the surface strain gauge (14) monitors the axial strain of structural steel, the second soil pressure gauge (21) monitors the contact pressure between a secondary lining and the primary supporting, and the second concrete strain gauge (22) monitors the annular strain of secondary lining concrete. Compared with the prior art, the tunnel supporting structure stress monitoring device has the advantages that the device is reasonable in embedding position, measuring results can be mutually verified and corrected, and the accuracy and reliability of the measuring results are increased.

Description

technical field [0001] The invention relates to a tunnel construction, measuring device and method, in particular to a tunnel support structure force monitoring device and method. Background technique [0002] During tunnel construction, the initial support of the tunnel is the key to ensuring construction safety. It can give full play to the bearing capacity of the surrounding rock itself, quickly close the surrounding rock, and prevent the surrounding rock from weathering due to long-term exposure and the influence of water and air. , hydration and collapse; the secondary lining is the molded concrete or reinforced concrete lining constructed on the inner side of the primary support in the tunnel engineering construction. [0003] The secondary lining and the primary support together form the primary support of the composite lining tunnel to bear the load. Therefore, the stress and strain states of primary support and secondary lining, the interaction force between struct...

Claims

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Application Information

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IPC IPC(8): E21F17/18
CPCE21F17/18
Inventor 江星宏杨新安何知思邱龑郭乐肖粤秀王薇许颖
Owner TONGJI UNIV
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