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A shield tunnel stratum action simulation test device and its test method

A technology for shield tunneling and simulation tests, applied in the field of tunnel tests, can solve problems such as unevenness, attenuation of tunnel lining segment stability, affecting the safety and normal operation of tunnel lining structures, etc., and achieves simple operation and is conducive to observation and installation simple effect

Active Publication Date: 2022-03-18
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since most shield tunnels pass through a variety of strata, the complex stratum conditions have brought great challenges to the stable operation of the tunnel. The settlement of the tunnel shows great inhomogeneity in the longitudinal direction of the tunnel. When it reaches a certain value, many diseases such as lining cracks, misalignment, and joint opening will occur, which will lead to the attenuation of the stability of the tunnel lining segment, seriously affecting the safety and normal operation of the tunnel lining structure

Method used

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  • A shield tunnel stratum action simulation test device and its test method
  • A shield tunnel stratum action simulation test device and its test method
  • A shield tunnel stratum action simulation test device and its test method

Examples

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Effect test

Embodiment 1

[0053] This implementation provides a simulation test device for stratum action in a shield tunnel, using the test system, including a loading module, a test module, a monitoring system module and a mobile measurement module. The loading module is the power system of the test device, which is used to load the lining segment. The test module is the main part of the test device, which is used to place the test model and conduct test research. The monitoring system module is used to detect and record the strain and stress changes of the lining model. The mobile measurement module is used to fully present the overall structural condition of the tunnel lining.

[0054] figure 1 It is a schematic diagram of the overall structure of the shield tunnel ground action simulation test device disclosed in this embodiment, which includes two sets of loading members and a steel bottom plate 7; each set of loading members includes a reaction frame 1, a square carrier frame 2, and an arc car...

Embodiment 2

[0072] Such as Figure 6 As shown, this embodiment also provides a shield tunnel formation simulation test method, using the simulation test device described in Embodiment 1, including:

[0073] (1) install the steel base plate 7 and the lateral fixing plate 11, embed the steel column 6 in the base plate 7 and fix it by bolts;

[0074] (2) hoisting the segment 8, installing it in the model test box 9, and connecting the segment 8 by bolts;

[0075] (3) Install the double-sided bearing frames 2 and 3, and fix them with the steel column 6 through bolts;

[0076] (4) Hydraulic jack 4 is installed, and the angle is adjusted to ensure that the range of applying pressure on segment 8 is accurate;

[0077] (5) The earth pressure gauge 15 is placed on the outer surface of the lining 8, the strain gauge 16 and the resistive displacement gauge 17 are placed close to the inside of the tunnel 8, and connected to the DH5972 dynamic monitoring system 14 through the wire 18;

[0078] (6) ...

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Abstract

The invention discloses a shield tunnel stratum action simulation test device and method, comprising a loading module, a test module, a monitoring system module and a mobile measurement module; the test module includes a model test box and a lining segment model; the model test box A lining segment model is installed inside; the loading module is the power system of the test device, which is composed of a reaction force frame, a hydraulic jack and a servo control system; the reaction force frame is installed on the model test box, and the hydraulic jack is fixed on the reaction force frame Above, the loading force is applied to the lining segment model; the monitoring system module includes a resistive earth pressure gauge, a strain gauge, and a resistive displacement gauge. The resistive earth pressure gauge is installed on the outer wall of the segment to measure the earth pressure around the pipe ; Strain gauges and resistive displacement gauges are installed on the outer wall of the segment to measure the stress change and displacement of the pipe ring respectively. The resistive earth pressure gauges, strain gauges and resistive displacement gauges are all connected to the dynamic monitoring system.

Description

technical field [0001] The invention relates to the field of tunnel tests, in particular to a simulation test device and method for simulating stress deformation of the lining of a shield tunnel during operation. Background technique [0002] With the rapid development of my country's economy and the acceleration of subway construction, the tunnel structure, as an important structure of underground space, has been widely used in China. Among them, the shield tunnel has gradually become the best structural form for underground rail transit construction due to its advantages of fast excavation speed, small construction disturbance, and no impact on ground traffic. At present, a large number of shield tunnels that have been completed and opened to traffic have begun to enter the operation period, and the issue of their operation safety and stability has become more and more important. [0003] Since most shield tunnels pass through a variety of strata, the complex stratum cond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M99/00
CPCG01M99/007
Inventor 刘健李佳解全一左志武王飞常洪雷韩勃王剑宏
Owner SHANDONG UNIV
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