Random detection method of assembling quality of assembling segment rings of shield tunnel

Abstract

The invention discloses a random detection method of the assembling quality of assembling segment rings of a shield tunnel. The random detection method comprises the steps that the assembling qualityof the N assembling segment ring of the shield tunnel is detected through the opposite positions of a 3D laser scanner and a plurality of target sets, obtaining of point cloud data, point cloud data fitting splicing, point cloud data processing, and assembling quality detection data calculation. The azimuth angles and length values of elliptical long shafts and short shafts of the segment rings which are just assembled to be formed can be measured under the conditions that the construction space of an operation area of a shield segment assembling machine is narrow and intervisibility is not achieved, the assembling quality control result of the assembling segment rings can be mastered in the first time after the assembling segment rings are assembled and before synchronous grouting, the assembling quality is controlled from a source, a constructor can detect the ovality of the assembling segment rings, circular seam slab end faulting, the circular seam width, longitudinal seam slabend faulting and the longitudinal seam width in a to-be-detected area without making direct contact with the assembling segment rings, the detection environment is safe, and detection data are accurate.

Description

Technical field: [0001] The invention belongs to the technical field of shield tunnel construction detection, in particular to a random detection method for the assembly quality of segment rings assembled in shield tunnels. Background technique: [0002] combine figure 1 , the shield mainly includes the segment assembly machine 3, the shield shell 5, the shield tunneling equipment 4 and the trailer. During the tunneling process, the shield tunnel needs to be assembled in time, and then the synchronous grouting is performed, and then the shield trailer travels with the shield tunnel. The machine excavates forward and walks forward. Each ring of assembled segment ring is assembled by several segments. The assembled gap between two adjacent segments on the same ring assembled segment is The assembly gap between the rings is a ring seam. [0003] Before synchronous grouting, it is necessary to randomly check the quality of the segment assembly, mainly through the total station...

AI Technical Summary

Problems solved by technology

[0005] 1. When using a total station to check the ellipticity of segment assembly, it is limited by the narrow construction space of the segment assembly machine in the shield machine. To directly measure the position of the major axis a and minor axis b of the ellipse of the forming segment ring, it is necessary to randomly test the major axis and minor axis data of several sets of different azimuth measuring lines, and then roughly select the reference major axis a and the reference Minor axis b, the roughly selected reference major axis a is horizontal relative to the tunnel section, and the total station cannot measure the major axis a not in the horizontal orientation

[0006] 2. Due to the large space height of the section of the shield tunnel with a diameter of more than 6 meters, it is difficult for the inspectors to measure the longitudinal direction of the middle and upper part of the segment ring without the aid of auxiliary equipment when using tools such as square plates, vernier calipers or feeler gauges for manual measurement. Seam offset, longitudinal seam width, annular seam offset and annular seam width are detected, the detection environment is dangerous and the operation is very difficult

[0007] There is no relevant report on the random detection method of the assembly quality of shield tunnel assembly segments and rings using 3D laser scanning technology

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