Method for filling soil box in research experiment of earth pressure balance shield stratum recognition

Abstract

The invention discloses a method for filling a soil box in research experiment of earth pressure balance shield stratum recognition. Through the adoption of the method, the soil box is filled with different types of soil bodies conveniently to form different stratum interfaces to facilitate research of real-time recognition of the stratum in the soil pressure shield; a certain pressure is appliedto the soil bodies in advance, so as to simulate the pressure in the soil in the real shield environment; and in addition, an air inlet pipe is arranged on a soil box cover, and the boundary pressure,generated by objects such as ground buildings or highways, on the ground is simulated by means of high-pressure gas in the real shield environment.

Description

technical field [0001] The invention relates to a method for filling a soil box in an earth pressure balance shield stratum identification research experiment, and belongs to the field of earth pressure balance shield machines. Background technique [0002] The earth pressure balance shield machine is a common equipment for soft soil tunnel construction. It has become the mainstream of urban underground engineering construction technology. The shield method construction is a continuous and dynamic process. Before excavating the tunnel with the shield machine, it is necessary to fully understand the excavation Geological information, on the basis of geological data, reasonably set the technological parameters of the shield machine, and if the geological information obtained before tunnel excavation cannot cover the geological conditions of the entire tunnel, it will lead to a "black box" in the strata ahead of construction. ” situation, so that the process parameters of the s...

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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, but the above-mentioned technology cannot easily fill the soil box with different types of soil to form the interface of different strata, so that it is not convenient for real-time identification of strata and due to the use of jacks and concrete cushions, displacement sensors cannot be set on the soil surface, so that the system cannot conduct research on ground deformation; in addition, because the concrete layer covers the soil surface, it will Affects the results of surface deformation to a large extent, so that the experimental results are quite different from the actual construction conditions

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