Soil pressure balancing type tunnel shielding simulation experiment system

Abstract

The invention relates to a soil pressure balance type tunnel shield analog experiment system, a rectangular soil coelom with the upper part provided with an opening is internally provided with a shield machine model and filled with a simulated soil body, the axle wire of the shield machine model is overlapped with that of the soil coelom; the upper surface of the simulated soil body is covered with a layer of concrete cushion the upper surface of which is connected with a horizontal loading beam by more than two soil pressure jacks, the horizontal loading beam is connected with the bottom of the soil coelom by an anchor rope; and the simulated soil body is also internally embedded with a soil pressure box, a grating fiber optical sensor and a displacement meter, wherein, the soil pressure box, the grating fiber optical sensor and the displacement meter are all electrically connected with a data acquisition and processing device. The system can simulate the influence of shield tunnel construction between subways of cities on the stratum and surrounding environment more conveniently, actually and effectively, and provide more actual and accurate experimental data for tunnel construction and design so as to guarantee the high-efficiency and safety of the shield tunnel construction of cities.

Description

technical field

[0001] The invention relates to an earth pressure balance type shield simulation test system. Background technique

[0002] The excavation of the shield machine in the tunnel structure construction is a dynamic process, and many factors during the excavation affect the stability of the soil around the shield machine. Simulate the tunneling process of the shield machine in the soil, and test the relevant parameters of the shield machine and the soil to determine the mutual influence among the machine body, soil and segment structure during the tunneling process; thus Provide experimental data for the design and construction of shield tunnels, so as to ensure the efficient and safe construction of urban subways.

[0003] At present, some shield tunneling simulation test models can only simulate the partial functions of the prototype shield machine for testing. Japanese scholars have carried out the most extensive experiments on earth pressure balance shield m...

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