Residue soil improvement experimental device for shield method tunnel construction

Abstract

The invention discloses a residue soil improvement experimental device for shield method tunnel construction, belonging to the technical field of shield method tunnel construction. The experimental device comprises a steel cylinder, stirring blades, a stirring shaft, a motor, a speed reducer, a torque meter, a test block fixing device, a test block and the like, and is partitioned into a test cylinder and a stirring device, wherein four improvement solution injection ports are formed; the stirring blades are uniformly distributed on the wall of the steel cylinder; four stirring blades are crossly connected to the stirring shaft; the tail end of one of the stirring blades is provided with a tool material test block fixing device; the test block is fixed at the tail end of the stirring blade of the test block fixing device; the left lower parts of a connector pipe and a connector pipe valve are connected with the steel cylinder; and the right lower part of a drain pipe valve is connected with the steel cylinder. In the device, the flow plasticity and shearing resistance of residue soil are quantitatively described by measuring the rotary torques of the stirring blades, the permeability coefficient of residue soil is measured by performing a permeation experiment, and the abrasiveness of residue soil on a tool is detected by measuring the abrasion loss of a tool material.

Description

technical field [0001] The invention relates to an experimental device for studying dreg improvement methods in shield tunneling construction in the technical field of shield tunneling construction. Background technique [0002] At present, in the construction process of the shield tunneling method, the specific implementation of muck improvement depends on the physical and mechanical properties of the excavated soil, and different soils require different improvement methods. The final effect of the improvement is to reduce the shear strength of the soil, so that the mixed soil in the pressure chamber can reach the ideal "flow-plastic state", so as to reduce the torque of the cutter head and the main propulsion, and avoid the occurrence of "slag" in the pressure chamber. Occlusion” and “cake formation” phenomena, to prevent engineering accidents such as “spouting” at the exit of the screw conveyor, rapid wear of the tool, and instability of the excavation surface. The impro...

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Problems solved by technology

These tests must be carried out separately on special test devices, and each test process is complicated and the test time is long, which does not meet the large number of test requirements for the study of dregs improvement methods

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