An intelligent dynamic control method for construction settlement of existing subway stations under zero distance

Abstract

The invention provides an intelligent dynamic control method for the construction settlement of an existing subway station under zero distance, and relates to the technical field of underground tunnel construction. The air bag group is then applied as a secondary lining. After the strength of the secondary lining is not less than 70%, pressurized gas is filled into the air bag, and the air bag group is adjusted according to the real-time settlement value of the monitored overlying material. The air pressure value of a part of the air bag is controlled dynamically through the linkage of the air bag group, so that the settlement of the overlying material is always within the allowable range of settlement control during the whole construction process and the fluctuation is minimized. When the strength of the secondary lining reaches 100% and monitoring After the real-time settlement value of the overlying material tends to be stable, the gas in the airbag is replaced with cement slurry. It solves the problems in the prior art that the settlement of the overlying structure in the construction of the existing subway station under zero distance is not easy to control and the compensation effect is poor.

Description

technical field [0001] The invention relates to the technical field of underground tunnel construction, in particular to an intelligent dynamic control method for construction settlement of an existing subway station under zero distance. Background technique [0002] With the acceleration of urbanization in our country, the construction of underground transportation is also in full swing. However, the construction of underground tunnels under zero distance will always face the problem of settlement of overlying structures. At present, new underground tunnels are usually excavated in multiple parts with small cross-sections, one step at a time, and one step at a time, and at the same time increase the support stiffness and strength to reduce the settlement impact of the construction below on the overlying soil layer or structures. However, only increasing the support stiffness or strength cannot effectively reduce the disturbance of the construction excavation to the ground,...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned problems in the prior art, the present invention provides an intelligent dynamic control method for the construction settlement of the zero-distance underpass of the existing subway station, which solves the problem of the zero-distance underpass of the existing subway station construction in the prior art. The settlement of the overlying structure is not easy to control and the compensation effect is poor

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