Device and method for convergence gauge constant moment loading for tunnel monitoring and measurement

Abstract

The invention discloses a device for convergence gauge constant moment loading for tunnel monitoring and measurement. The device comprises a loading bourdon tube and a tension bolt, wherein the tension bolt is sleeved with the loading bourdon tube which is used for transmitting externally-exerted twisting force to a tension nut, a leaf spring is fixedly arranged at the inner side of the loading bourdon tube, is used for transmitting the twisting force to loading teeth and is separated from the loading teeth when the twisting force exceeds the elasticity modulus of the leaf spring, the tension bolt comprises the tension nut and a tension screw which are mutually matched and used for converging measurement tension loading, the loading teeth are fixed to the outer side of the tension nut and used for receiving the twisting force transmitted by the leaf spring. The invention further discloses a method for convergence gauge constant moment loading for tunnel monitoring and measurement. Due to the arrangement of the specific leaf spring with the constant elasticity modulus and the high precision, measurement errors caused by the angle of views of different measurers when the measurers read a scale mark, concepts of the different measurers, influence of the width of the scale mark and the like are avoided, only twisting operation is needed, the measurement work is greatly facilitated, and the efficiency is remarkably improved.

Description

technical field [0001] The invention relates to a constant moment loading device and method for an extensometer used in tunnel monitoring and measurement. technical background [0002] Monitoring and measurement technology is an important part of modern tunnel construction, and an important part of information design and construction guidance. Due to the mechanical characteristics and complexity of the tunnel engineering, the dynamic information of the surrounding rock obtained through the monitoring and measurement of the construction site can be used to judge the stability of the surrounding rock, the reliability of the support and lining, the reasonable construction time of the secondary lining, and the modification Construction method, adjustment of surrounding rock category, change of support design parameters, adjustment of reserved deformation and other revision design provide the original basis. Convergence around the tunnel and the sinking value of the vault are a ...

AI Technical Summary

Problems solved by technology

At present, most of the convergent gauges at home and abroad use the reading tension scale line to determine the tension state, but due to the different perspectives and concepts of different measurers when reading the scale line and the influence of the width of the scale line, the measurement data will have a large difference. error, and the operation of reading the scale line is extremely inconvenient

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