Abstract
Construction of subway line intersection stations will become more and more popular in the future. Research on the deformation characteristics in the construction process is the best way to ensure the safety of the foundation pit itself, the surrounding buildings, and adjacent subway stations. In this paper, the deformation characteristics of a T-shaped subway foundation pit during construction are studied by an integrated dewatering-excavation three-dimensional numerical simulation method. The results show that the main causation of the surface settlement around the foundation pit is the stratum compression caused by dewatering, and the main causation of the deformation of the diaphragm wall and the existing subway station is the soil deformation caused by excavation unloading. It is suggested that constructing a high-quality diaphragm wall, controlling the water level within the excavation foundation pit, strengthening the monitoring, and timely cement pouring of the bottom plate are key countermeasures to reduce the deformation. The research results of this paper have reference significance for similar projects.
Highlights
IntroductionThe construction of transit urban rail transithas in China has been developed rapidly in recent
The impact of foundation pit excavation on the adjacent existing station is mainly located at the side wall, and it has little influence on other parts of the station
By comparing the simulation results with the actual monitoring data, it was found that the integrated dewatering-excavation process numerical simulation method can accurately reflect the deformation characteristics of the foundation pit excavation process
Summary
The construction of transit urban rail transithas in China has been developed rapidly in recent. The construction of urban rail in China been developed rapidly in recent. Received: 11 January 2022 years, andyears, will and be more more transfer to be at subway intersections. There and will there be more moreand transfer stations stations to be built at built subway interseceived: 11 January 2022. The transfer station mainly includes “ ╋ ,” “T,” “L,”. Up-down overThe transfer station mainly includes “ ”, “T”, “L”, and up-down overlapping transfer cepted: 9 February 2022
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