Measuring device and method for shield tunnel segment joint deformation

Abstract

The invention discloses a measuring device and method for shield tunnel segment joint deformation. The device is composed of an anchoring joint, a fixed rod, a transmission rod, a follow-up rotary laser transmitter, an optical screen and other components. According to the basic principle of the device, through reasonable design and arrangement of the rod and the laser transmitter, deformation of segment joints are amplified, and the joints do not affect one another when expanded and staggered. According to the designed measuring device, expansion of the joints enables a laser optical path to turn horizontally, staggering of the joints enables the laser optical path to deflect vertically, corresponding geometric figures are formed before and after change in the laser optical path, and the expansion amount and staggering amount of the joints can be conveniently calculated through the geometric similarity relation. Compared with existing measuring means, by the adoption of the measuring device, deformation of the joints can be measured comprehensively, the measurement precision of joint deformation is greatly improved, and the problem that it is hard to measure joint deformation accurately and comprehensively in practical engineering by existing measuring means is solved.

Description

technical field [0001] The invention relates to the technical field of engineering measurement, in particular to a device and method for measuring the deformation of segment joints of a shield tunnel. Background technique [0002] With the construction and operation of a large number of subways in my country, as the lifeline of urban traffic, the characteristics and conditions of subway shield tunnels are crucial to the normal operation of cities, and they have attracted more and more attention from the society. The lining of subway shield tunnels is generally assembled from segments, and the existence of a large number of joints is its most notable feature. The existence of joints has a great impact on the mechanical properties of the tunnel structure. Once the joints are greatly deformed, stress concentration will occur In severe cases, the segment will crack, causing a series of hazards such as water leakage, freezing damage, and corrosion of steel bars, posing a serious ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of the existing measuring means, the main technical problem to be solved by the present invention is to provide a measuring device capable of accurately and comprehensively measuring the opening and dislocation of the joints during the construction process of the shield tunnel and under the action of external loads.

Images