A method and device for automatically measuring deformation of tunnel section

Abstract

The invention discloses a device for automatic measurement of tunnel section deformation. The device comprises a plurality of measurement rod pieces and a fixed base, wherein the two ends of each measurement rod piece are fixed to the wall of a tunnel through the fixed base, and the measurement rod pieces are connected to form a folded line outline of the section of the tunnel; each measurement rod piece is provided with a tilt angle sensor, the length of each measurement rod piece changes along with the deformation of the section of the tunnel, and a displacement sensor is arranged on each measurement rod piece; the change of the length of each measurement rod piece is measured through the displacement sensors. According to the device and method for automatic measurement of tunnel section deformation, the telescopic measurement rod pieces are adaptive to tunnel section deformation; the change of the length of each measurement rod piece is measured through the displacement sensors; the three-dimensional angle of each measurement rod piece is measured through the tilt angle sensors, the fitted curve of the section of the tunnel is obtained through the measurement rod pieces, and then tunnel section deformation is monitored.

Description

technical field [0001] The invention relates to the field of tunnel construction engineering, in particular to a method and a device for automatically measuring deformation of a tunnel section during tunnel construction. Background technique [0002] With the continuous development of my country's economy and society, the scale of transportation infrastructure construction has gradually expanded, and the number and mileage of tunnels have gradually increased. As of 2010, the total length of my country's built railway tunnels exceeds 7,000km, road tunnels reach 5,000km, and subway lines reach 1,400km. It is estimated that by 2020, my country will also plan to build 5,000 tunnels with a total length of more than 9,000 kilometers. my country has become the country with the most, most complex and fastest-growing tunnels in the world. [0003] Tunnel deformation monitoring plays an important role in both tunnel construction and operation phases. On the one hand, tunnel deforma...

AI Technical Summary

Problems solved by technology

This measurement method has the following disadvantages: 1) It requires technicians to go to the site for manual measurement. Not only is the on-site operation complicated, time-consuming and laborious, but also human factors have a great impact on the measurement accuracy; 2) The tunnel light is weak, the measurement site is narrow, and the environment Complexity and many influencing factors lead to low measurement reliability and sensitivity; 3) Each section only measures a few points, and it is difficult to accurately reflect the deformation state of the entire section; 4) It often interferes with the normal construction and operation of the tunnel, often The original measurement line had to be abandoned, resulting in the interruption of measurement data; 5) Usually, file management and manual calculation are used to process on-site monitoring data, which cannot realize database management, sharing and original data traceability, resulting in low analysis efficiency and true data sex not guaranteed

The Bassett convergence system has the characteristics of high precision and automation, but the design mechanism of the long and short booms is complicated, the cost is expensive, and it occupies too much traffic area of ​​the tunnel section, so it is difficult to be popularized and applied in actual engineering

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