Triaxial instrument device realizing variable dimension muddy water splitting test and using method thereof

Abstract

The invention provides a triaxial instrument device realizing variable a dimension muddy water splitting test and a using method thereof. The triaxial instrument device realizing the variable dimension muddy water splitting test comprises a bottom plate, a sample table seat placed on the bottom plate, a sample placed on the sample table seat, a reducer pipe placed at the bottom end of a sample middle hole, a top plate placed at the top of the sample and a rubber membrane placed on the sample outer wall. A grouting opening is formed below the bottom plate, a middle hole of the sample table seatcommunicates with the grouting hole, the fine end of the reducer pipe is inserted into the middle hole of the sample table seat, the butt end of the reducer pipe extends into the middle hole of the sample, assigned confining pressure is applied to the exterior of the rubber membrane, meanwhile, assigned axle pressure is applied to the upper part of the top plate, and then, slurry is injected intothe grouting opening and flows into the middle hole of the sample through the reducer pipe until the sample is split. According to the triaxial instrument device realizing the variable dimension muddy water splitting test, the dimension and shape of a model can be conveniently and fast switched in the muddy water splitting test, researching the influence of the dimension and shape on the splitting test is facilitated, and meanwhile, the reducer pipe is designed to effectively prevent middle hole muddy water from permeating into cracks between the sample bottom and the table seat.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a triaxial instrument device for realizing a variable-size mud-water splitting test and a method for using the same. Background technique [0002] With the rapid development of tunnel construction technology today, the shield method has increasingly become the mainstream construction method of tunnel construction, especially in the construction of underwater tunnels, the mud-water balance shield is basically used. The mud-water balance shield maintains the stability of the face in front of the cutter head by applying mud-water pressure in the mud-water silo, and discharges the slag through mud-water circulation. The setting of the muddy water pressure in the muddy water silo has an important effect on the safe construction of the shield. If the muddy water pressure of the muddy water silo is too small, it may cause instability and collapse of the face. River (sea) wa...

AI Technical Summary

Problems solved by technology

[0004] Since the shape and size of the sample pedestal of the current triaxial instrument are fixed, one test equipment can only test samples of one shape and size. To obtain the test results of samples of different shapes and sizes, multiple different The standard triaxial is used for the test, which increases the cost of the test, and the muddy water in the hole of the sample can easily penetrate into the gap between the bottom of the sample and the pedestal during the test, resulting in the failure of the test

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