Three-dimensional loading simulation test device for tunnel boring machine

Abstract

The invention discloses a three-dimensional loading simulation test device for a tunnel boring machine. The upper end of a vertical load force transfer column is connected with a spherical pad, the lower end of the vertical load force transfer column is connected with a hobbing cutter bracket, and the spherical pad is connected with the upper beam of a presser through bolts; a puller is fixed on the outer side of the facade of the system base, a pull rod is connected with the puller and a specimen bottom bearing plate after penetrating through the facade of the system base, and the specimen bottom bearing plate is provided with spacing strips and arranged on a rolling shaft of the system base; a horizontal lifting jack is fixed on the outer side of a side plate, the piston end part is provided with a specimen lateral bearing plate, and a horizontal load force transfer column is fixed on the inner sides of opposite side plates; a displacement sensor and a shaft type load sensor are connected with a data acquisition instrument through cables; the data acquisition instrument is connected with a computer through a USB connecting line; and an acoustic emission sensor is connected with an acoustic emission test system through a cable. The three-dimensional loading simulation test device has the advantages of simple structure, rich test data and comprehensive and reliable test result, and is convenient to use.

Description

technical field [0001] The invention belongs to the technical field of rock mechanics tests, and in particular relates to an experimental device for simulating the three-dimensional rock-breaking process of a tunnel boring machine (TBM). Provide basis for construction parameter selection. Background technique [0002] TBM is the English abbreviation of tunnel boring machine, which is a kind of tunnel boring machine specially for hard rock. The excavation process of the tunnel boring machine includes: the hob penetrates into the rock mass on the tunnel face through thrust, and the rotation of the cutterhead drives the hob on the cutterhead to crush the rock mass, so that the rock on the tunnel face is broken into fragments. Therefore, the tunnel boring machine has unique advantages such as good hole quality and fast excavation speed in the construction of long tunnels. According to the structural characteristics and working characteristics of the tunnel boring machine, the ...

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Problems solved by technology

At present, the selection of tunnel boring machine type, cutter head configuration and construction parameters is generally based on the results of indoor rock mechanics tests, but the construction object of tunnel boring machine is rock mass, because the mechanical behavior of rock mass is affected by environmental factors (such as ground stress) and structural factors. Due to the influence of factors (such as rock mass structural plane), the mechanical test results of the rock cannot represent the mechanical behavior of the rock mass, and the equipment and construction parameters selected accordingly may not be able to exert the best efficiency of the tunnel boring machine

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