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Hydraulic analogue method of shield tunneling structure model

A structural model and technology of shield tunnels, applied in the field of indoor simulation of shield tunnel structures, can solve problems that restrict the construction and application of underwater shield tunnels, and achieve the effect of ensuring construction and operation safety and strong applicability

Active Publication Date: 2008-12-10
SOUTHWEST JIAOTONG UNIV
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  • Abstract
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Problems solved by technology

At present, there is no effective method to simulate the water pressure on the tunnel structure model, which restricts the construction and application of underwater shield tunnels

Method used

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  • Hydraulic analogue method of shield tunneling structure model
  • Hydraulic analogue method of shield tunneling structure model
  • Hydraulic analogue method of shield tunneling structure model

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Embodiment

[0021] First of all, it needs to be explained that, for the sake of simplicity and clarity of the diagram, figure 1 , figure 2 Plotted are the cases of uniform loading and non-uniform loading, respectively. In fact, when the present invention is implemented, uniform and non-uniform loading are carried out simultaneously, namely figure 1 , 2 The structural model in is the same model, and all other devices are distributed and set superimposed on the model at the same time. That is, the actual implementation situation should be figure 1 , figure 2 Synthesis.

[0022] A kind of embodiment of the present invention is, a kind of hydraulic pressure simulation method of shield tunnel structure model, and its practice is:

[0023] A. Arrange uniform pressure loading device figure 1 As shown, the method of arranging the uniform pressure loading device is: the structural model 1 of the shield tunnel is placed horizontally on the ground, and one end of the eight hoop steel st...

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Abstract

The invention relates to a hydraulic pressure simulating method for a structure model of a shield tunnel. The method includes: adopting more than two strand hoops to apply a uniform radial pressure on the outer surface of the structure model that is horizontally arranged; simultaneously, sticking a stretching strand on the same semi-arc side of the surface of the structure model and applying a tension force on the stretching strand from the other side of the surface of the structure model, thereby applying a non-uniform radial pressure on the semi-arc side of the structure model; the bulb hydraulic pressure endured by the structure model of the shield tunnel is simulated by overlapping the uniform and non-uniform radial pressures. Then the corresponding dynamic parameters of the structure model is detected and fed into a computer for processing. The method realizes the simulation on the bulb hydraulic pressure endured by the structure model of the shield tunnel under the water, can realize the mechanical tests on the e structure models of shield tunnels under different water level conditions and provides a scientific test basis for the design and construction on the underwater structure of the shield tunnel for ensuring the construction and operating safety of the tunnel.

Description

technical field [0001] The invention relates to an indoor simulation method of a shield tunnel structure, in particular to a water pressure simulation method of a shield tunnel structure model. Background technique [0002] Under the action of external hydrostatic pressure, the underwater shield tunnel structure on the seabed and river bottom is in the shape of a "bulb" with a small top and a large bottom, such as image 3 shown. During the construction and operation period, the water pressure suffered by the tunnel changes greatly. In addition to the current trend of large-scale tunnel sections, the effect of the non-uniform water pressure on the tunnel structure during the construction and operation periods of the underwater shield tunnel cannot be ignored. By simulating the effect and influence of the bulb-shaped water pressure on the tunnel structure, a scientific and reliable test basis can be given for the design and construction of the underwater shield tunnel structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/00
Inventor 何川封坤晏启祥张志强杨雄何应道
Owner SOUTHWEST JIAOTONG UNIV
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