An experimental device and method for simulating the formation and removal mechanism of mud cake

Abstract

The invention discloses an experimental device and method for simulating the formation and removal mechanism of mud cake, comprising a rectangular steel structure frame, a plurality of propulsion oil cylinders arranged at the lower part of the steel structure frame, arranged on the upper part of each propelling oil cylinder and connected with each oil cylinder The flange is set on the soil bin on the flange, and the output shaft is set on the upper part of the steel structure frame. One end of the output shaft is fixedly connected with the steel structure frame, and the other end of the output shaft is connected with the micro cutter head. A fixed frame fixedly connected with the output shaft, a motor and a worm reducer connected to the motor are arranged above the steel structure frame; each propulsion oil cylinder is fixedly connected to the bottom of the steel structure frame, the soil bin and the flange are detachably connected, and the fixed frame Located above the micro cutter head, the worm reducer is connected with the output shaft. The invention has the following beneficial effects: the device of the invention has the characteristics of simple structure, measurable temperature, torque and force, and can carry out different experiments according to the characteristics of cutter head and formation, prospectively equipped with ultrasonic probes, and can also simulate methods such as chemical dispersants. The effect of removing the mud cake under the action provides experimental support for the decision-making of the shield design and application stage, and has a positive effect in this field.

Description

technical field [0001] The invention relates to the technical field of shield construction, in particular to an experimental device and method for simulating the formation and removal mechanism of mud cakes. Background technique [0002] As a kind of mechanized construction equipment, shield is widely used in the construction of subways, highways, and comprehensive pipe corridors, and has the advantages of fast construction speed and high degree of mechanization. In certain strata, such as clay and mudstone stratum shield, during the construction process, the panel of the cutter head will be covered with mud cake, and the cutter cannot cut the soil layer effectively, resulting in low driving efficiency, large stratum disturbance, and long mud cake and stratum. The friction of time will generate a lot of heat, which is easy to cause the problem of failure of the main bearing seal. In order to facilitate the simulation of the mud cake formation process and evaluate the effect...

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Problems solved by technology

[0003] The present invention overcomes the problem that the cutter head is wrapped by mud cakes during the construction of specific strata in the prior art, so that the soil layer cannot be effectively cut, the excavation efficiency is low, the stratum is greatly disturbed, and a large amount of heat is generated by long-term friction between the mud cake and the stratum. In order to solve the problem of bearing seal failure, an experimental device and method for simulating the formation and removal mechanism of mud cake was proposed

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