Method for measuring deformation of large-scale tunnel

Abstract

The invention discloses a method for measuring the deformation of a large-scale tunnel. The method adopts non-contact optical measurement and comprises the following steps of: projecting a plurality of laser mark points serving as measurement datum points to the wall of the tunnel; synchronously acquiring high-resolution digital images of the laser mark points on the wall of the tunnel by using two cameras; calculating three-dimensional data of measured positions through methods of image recognition, machine vision and the like; and detecting the deformation of the tunnel at different times by comparing the measured data of different times. According to the method, the deformation of the tunnel in a three-dimensional space can be accurately measured, and engineering staffs are guided to prevent hidden troubles of the tunnel in advance and reinforce tunnel foundation bodies; moreover, according to the method, measurement can be conveniently and quickly performed, the measured data has high integrity, and the stability and the reliability of deformation data of the tunnel are improved.

Description

technical field [0001] The invention relates to a large-scale tunnel deformation measurement method. Background technique [0002] With the development of modern science and technology, in daily life, with the increasing number of highways, railways, and urban rail transit projects, more and more large-scale tunnel projects are used, and large-scale tunnels have high requirements for construction projects, especially in construction There are higher requirements in terms of technology, support requirements and deformation. Tunnel deformation monitoring and control is a very important content in the tunnel construction process and subsequent tunnel maintenance process. How to monitor tunnel deformation more accurately has become a hot spot and a difficulty for engineers. [0003] The construction of the tunnel changes the original geographical structure, destroys the original geological balance, and causes the deformation of the tunnel. Destructive deformation, engineering ...

AI Technical Summary

Problems solved by technology

The traditional methods of measuring deformation are relatively few, and the measurement is inconvenient, and the measurement accuracy of deformation is poor. If the sensor method is used, enough sensors need to be installed on the tunnel wall, and even need to be installed during the tunnel construction process. Inconvenient and difficult to maintain, and the sensor method is contact type, the working process is complicated and the efficiency is low

There are also some ultrasonic methods, the accuracy of measuring deformation is poor, and the degree of interference is large. These are caused by the inherent properties of the measurement method itself, which is not easy to overcome.

The disadvantages of the total station for deformation monitoring are: low measurement accuracy, and the large number of measurement points will greatly increase the workload of measurement, such as large tunnels, monitoring deformation requires a large number of data points, and requires a lot of manpower and time during the measurement process. Difficult to realize automatic detection

In addition, it is also difficult to implement the observation with the leveling instrument and the leveling rod.

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