Monitoring and measuring method using displacement sensor to measure tunnel deformation

Abstract

The invention provides a monitoring and measuring method using a displacement sensor to measure tunnel deformation. The monitoring and measuring method comprises the steps of setting a measurement point on a section of an arc tunnel, and connecting a line; arranging a connection rod at an arc measurement point; fixing a displacement transfer rod on the connection rod and fixing a first base on the connection rod; arranging a horizontal measuring rod at the position of the measuring point, and arranging a second base on the horizontal measuring rod; respectively setting the crosspoints of the displacement transfer rod and a horizontal measuring line as a first measurement point and a second measurement point; fixing a displacement sensor bracket on the first base or the second base, and arranging a horizontal direction displacement sensor and a vertical direction displacement sensor on the displacement sensor bracket; measuring horizontal clearance variation and vertical clearance variation, judging the deformation situation of the tunnel accordingly, calculating the horizontal clearance variation between a left measurement point and a right measurement point, and calculating a mean value of the vertical clearance variation between the arc measurement point and the horizontal measurement line. The monitoring and measuring method provided by the invention has the advantages of rapidness in test, high testing precision, less interference on construction and low cost, can be used for monitoring in real time, and can be used for determining whether the tunnel is biased or not according to the testing result of the clearance variation of the channel.

Description

technical field [0001] The invention relates to a monitoring and measuring method for tunnel deformation. In particular, it relates to a monitoring and measuring method for measuring tunnel deformation by using a displacement sensor. Background technique [0002] Tunnels occupy a large proportion in the construction of mountain railways and highways in my country. At present, the new Austrian method is generally used in the design and construction of tunnel projects in my country. The new Austrian method is based on mechanical considerations, combines the support structure with the surrounding rock, and conducts on-site tunnel deformation management to form a complete tunnel dynamic design and construction. the concept of. During the construction stage, the tunnel deformation monitoring measurement should be carried out. The main purpose of the tunnel deformation monitoring measurement is to understand the stability of the surrounding rock and the reliability of the initial...

AI Technical Summary

Problems solved by technology

However, the measurement error is relatively large, generally the highest accuracy is ±3mm, while the accuracy required by the technical regulations is 0.5mm to 1mm; in addition, the laser radar and laser rangefinder are precision instruments, the instruments are expensive, and the environment during tunnel construction is harsh (wet, vibration and dust generated by blasting), it is difficult to be applied in tunnel deformation monitoring measurement

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