Method for soil box filling in simulation experiment of soil pressure balance shield machine

Abstract

The invention discloses a method for soil box filling in simulation experiment of a soil pressure balance shield machine. Through the method, not only can the internal pressure of soil in the real shield environment be simulated, but also an air inlet tube can be arranged on a cover of the soil box and the boundary pressure on the ground generated by objects such as ground buildings or highways during real shield construction is simulated by utilizing high-pressure gas; and because gas pressing is applied, a displacement sensor can be further arranged on the surface of the soil to test the influence of shield on the deformation of the ground surface.

Description

technical field [0001] The invention relates to a simulation experiment method of an earth pressure balance shield machine, in particular to a soil box filling method in the simulation experiment of an earth pressure balance shield machine. Background technique [0002] The shield tunneling method is an important tunnel construction method, which has been widely used in municipal and transportation fields in my country in recent years. The earth pressure balance shield machine is a common equipment for tunnel construction in soft soil. It has become the mainstream of urban underground engineering construction technology. The shield method construction is a continuous and dynamic process. There are various machine parameters and parameters during the excavation process of the shield machine. Construction parameters need to be set, such as cutterhead speed, screw excavator speed, total propulsion pressure, soil chamber pressure, propulsion speed, cutterhead torque, etc. What i...

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Problems solved by technology

For example, the invention patent with the publication number CN101403306A discloses an earth pressure balance shield simulation experiment system, which uses earth pressure jacks and concrete cushions to simulate the pressure inside the soil in the actual tunnel construction environment, and the pressure on the ground. The boundary pressure generated by objects such as buildings or roads on the soil makes the experiment more realistic and reliable. However, due to the use of jacks and concrete cushions, displacement sensors cannot be placed on the soil surface, making the system unable to perform surface deformation. In addition, because the concrete layer covers the soil surface, it will greatly affect the results of surface deformation, so that the experimental results are quite different from the actual construction conditions

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