Dynamic measurement device for shield tunnel lining segment joint wrong lifting

Abstract

A dynamic measurement device for shield tunnel lining segment joint wrong lifting comprises an electrical connector end used for being connected with a cable, an electron bin module used for data processing, two waveguide tubes containing waveguide wires, two sets of sliding block modules which are arranged on the two waveguide tubes respectively and slide and move along the waveguide tubes, and two sets of measurement rod modules connected with the two sets of sliding block modules respectively. When the dynamic measurement device is used, measurement rods which are fixed to connecting ends abut against the two sides of a lining segment joint respectively and slide along the joint with the help of pulleys at the ends of the measurement rods, the distances between magnets in two positions and the electron bin module are calculated and stored through a central processing unit in a dynamic mode according to the magnetostriction principle, and therefore the difference value obtained through each time of the position change of the magnets in the two positions is converted and outputted, and the difference value is the height difference of the portions, on the two sides of the joint, of a lining segment in the radial direction. According to the dynamic measurement device, the wrong lifting of annular seams and longitudinal seams of the shield tunnel lining segment can be measured in a dynamic mode, manual conversion is not needed, the maximum wrong lifting amount, the minimum wrong lifting amount and the average wrong lifting amount of the measured joints can be directly outputted, and the dynamic measurement device is easy to operate and high in practicability.

Description

technical field [0001] The invention belongs to the field of civil engineering, and relates to a measuring device in rail transit and tunnel engineering, in particular to a measuring device for the seam staggering of a shield tunnel lining segment. Background technique [0002] The staggering of assembled segments in shield tunnels has always been a technical problem that plagues the construction and maintenance of shield tunnels, and has not received enough attention for a long period of time. With the development of shield tunneling construction technology and the improvement of technical standards, problems such as segment cracking, assembly difficulties and waterproof hidden dangers caused by staggered platforms have begun to highlight the impact on construction and operation. Therefore, it is necessary to carry out on-site measurement and analysis of the mislifting of lining segments in the process of shield tunneling and use, so as to improve the quality of the project...

AI Technical Summary

Problems solved by technology

[0003] Since the shield tunnel lining segments are assembled by rings and blocks, there are not only longitudinal seams between blocks, but also ring seams between rings. A large number of seams have caused great problems for actual engineering inspections. troubled

At present, there are two kinds of detection commonly used in practice: one is to rely on trained professional technicians to manually use a triangular ruler to visually inspect and record, this method is subject to great subjectivity, large errors, and the possibility of omission and exaggeration; The other is to use measuring instruments for point layout detection. First, this method can only arrange discrete measuring points, and cannot completely record the mislift of each joint, causing misleading to the actual segment mislift. Secondly, in the During the detection process, it is necessary to repeatedly arrange the measuring points and install the instruments, which leads to heavy workload, low efficiency, high cost, and long time-consuming. Moreover, the measurement accuracy of the existing instruments cannot be guaranteed in the environment of tunnel temperature changes and alternating dry and wet conditions. Easy to rust, short service life

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