Device and method for measuring advance of shield tunnel segment

Abstract

The invention discloses a shield tunnel segment lead measurement device, which comprises a cuboid-shaped base body and a laser pointer embedded in the front end of the base body, and a power supply for the laser pointer is arranged inside the base body, and the base body A power switch and a tube level are set on the side wall of the base body, the power switch is connected in series in the power supply circuit where the power supply supplies power for the laser pointer, a measuring handle is set on the top of the base body, and a tube level is set on the bottom of the front end of the base body Alignment lines on the arc surface of the chip and prisms used in conjunction with the total station. The invention also discloses a method for measuring the leading amount of the segment of the shield tunnel. The invention can accurately, conveniently and quickly measure the leading amount of shield tunnel segments, greatly saves manpower and material resources, provides data support for accurate segment selection, helps to improve the quality of formed tunnels, has strong practicability, and is convenient Promotional use.

Description

technical field [0001] The invention belongs to the technical field of shield tunneling construction, and in particular relates to a device and method for measuring the advance of a shield tunnel segment. Background technique [0002] The curve part of the shield tunnel is fitted through the control of the segment wedge, and from the perspective of the entire shield excavation process, the shield machine is a serpentine advancing process, taking the centerline of the tunnel as the benchmark, and considering the clearance of the shield tail Influence and other factors, use the wedge shape of the segment to continuously adjust the posture of the shield machine to ensure that the deviation of the formed tunnel is within the allowable deviation range. [0003] When selecting a segment, different point selections will lead to different correcting directions. For segment selection, it is more important to consider the end face of the current segment in addition to the shield tail ...

AI Technical Summary

Problems solved by technology

Later, through the measurement of segment lead, it was found that the right lead of the segment was 60mm, that is, the segment had a very obvious tendency to the left, and the selection of the segment was unreasonable, resulting in difficulty in correcting the deviation and cracking of the segment

[0005] At present, segment selection is still a relatively extensive calculation and management method. In actual construction, consider: ① the relationship between the posture of the shield machine and the center line of the tunnel; ② the stroke difference of the oil cylinder (propelled oil cylinder + hinged oil cylinder); There are three factors of gap, roughly judging a trend, used to infer the selection of segment assembly point, and no strict calculation is carried out, especially the current leading amount of segment end face does not have a good measurement method, for accurate segment selection It also caused a technical bottleneck, which in turn affected the quality of the formed tunnel

Images