An earth pressure balance shield machine simulation experiment device

Abstract

The invention discloses an earth pressure balance shield simulation experiment device. By arrangement of telescopic hydraulic cylinders and a steel plate on an earth box cover, a certain pressure canbe applied to earth in advance so as to simulate earth internal pressure in a real shield environment. By arrangement of an air inlet pipe on the earth box cover, boundary pressure applied to the ground by objects such as ground buildings or roads in real shield can be simulated through high-pressure air; due to air pressurizing, displacement sensors can be further arranged on earth surface to test influences of shield on surface deformation. In addition, by arrangement of structures such as a first supporting hydraulic cylinder group and a second supporting hydraulic cylinder group, horizontal angles of a miniature earth pressure shield machine and the earth box can be adjusted, so that researches of inclined tunnel shield simulation can be carried out.

Description

technical field [0001] The invention relates to a simulation experiment device 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 is the relationship between the above parameters and how to set these parameters to achieve high efficiency? , Stable...

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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 internal pressure of the soil in the actual tunnel construction environment and the construction on the ground. The boundary pressure generated by objects such as objects or roads on the soil makes the experiment more realistic and reliable. However, due to the use of jacks and concrete cushions, it is impossible to set displacement sensors on the soil surface, so that the system cannot be used for surface deformation. In addition, because the concrete layer covers the soil surface, it will greatly affect the results of ground deformation, so that the experimental results are quite different from the real construction conditions; finally, because the model shield machine and the The horizontal angle of the soil cavity cannot be adjusted, so the system cannot be used for research on inclined tunnel shields

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