Earth pressure balance type shield simulation test system

Abstract

The invention discloses an earth pressure balance type shield simulation test system. A model shield machine is arranged in a rectangular earth mass chamber, wherein the upper part of the rectangular earth mass is opened; a simulation earth mass is filled in the rectangular earth mass chamber; an axle wire of the model shield mechanism is overlapped with that of an earth mass chamber; the simulation earth mass is covered with one concrete cushion; an upper surface of the concrete cushion is connected with a horizontal loading beam through more than two earth pressure jacks; the horizontal loading beam is connected with the bottom of the earth mass chamber through an anchor cable; and an earth mass pressure box, a fiber grating sensor and a displacement meter are embedded in the simulation earth mass and electrically connected with a data acquiring and processing device respectively. The earth pressure balance type shield simulation test system can simulate the influence of shield tunnel construction among urban subway areas on stratum and a surrounding environment more conveniently, more truly and effectively and provides more true and accurate experimental data for the construction and the design of the tunnel so as to ensure the high efficiency and the safety of the construction of urban shield tunnels.

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 ...

AI Technical Summary

Problems solved by technology

[0015] More real and accurate experimental data will seriously affect the efficiency and safety of urban shield tunnel construction

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