A device and method for monitoring the stress of a tunnel support structure

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...

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

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