Multifunctional shield tunnel segment joint deformation measuring device and measuring method

Abstract

Provided is a multifunctional shield tunnel segment joint deformation measuring device. The measuring device is composed of a tri-prism steel feeler gauge, an 'L'-shaped transmission sliding rod and a digital display dial indicator, wherein the steel feeler gauge is provided with a transmission sliding rod sliding guide slot, the 'L'-shaped transmission sliding rod is arranged in the sliding guide slot and can slide freely in the sliding guide slot, the digital display dial indicator is connected with the transmission sliding rod, and the reading displayed on the digital display dial indicator is the sliding distance of the transmission sliding rod. The invention further discloses a method for carrying out measurement with the use of the multifunctional shield tunnel segment joint deformation measuring device. The device of the invention has the advantages of simple structure, low manufacturing cost, high measurement accuracy, convenient use, high degree of automation and high measurement speed, and can be used for simultaneously measuring the opening degree and the dislocation degree of a shield tunnel segment joint rapidly and accurately.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering measurement and relates to a device for measuring joint deformation of shield tunnel segments. Background technique [0002] At present, the lining of shield tunnels is mostly made of prefabricated reinforced concrete segments spliced ​​by connecting bolts, so there are joints between segments. With the construction and operation of a large number of shield tunnels, their diseases are becoming more and more prominent. Among them, a major problem is the joint deformation of tunnel segments, including the opening and staggering of joints. Excessive joint deformation means that the structure It may be in a relatively unfavorable stress state, such as excessive tension of bolts, shearing of bolts, local stress concentration of joint concrete, etc., which will also reduce the waterproof capacity of joints and increase the risk of tunnel leakage. Therefore, in order to clarify the safety sta...

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Problems solved by technology

At the present stage, when measuring the opening of shield tunnel segment joints, the main methods are insert measurement and ruler measurement. Insert measurement cannot accurately obtain the joint opening value. Although ruler measurement is quantitative measurement, it has slow readings and high accuracy. The problem of low and high subjectivity, the measurement of the offset is mainly based on the measurement of the ruler, and most of the seams have the phenomenon of opening and offset at the same time, which also increases the difficulty of measuring the amount of seam opening and the height of the offset

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