Study on the influence of deep foundation pit excavation on the deformation of adjacent viaduct pile foundation

Haitao Wang, Mingyang Xu, Tao Guo, Minghua Cui and Jiangtao Tian

International Journal of Critical Infrastructures, 2024, vol. 20, issue 3, 288-307

Abstract: In order to study the influence of deep foundation pit excavation on the deformation of adjacent viaduct pile foundation in water-rich karst environment, a three-dimensional finite element analysis model was established, and the dewatering process of deep foundation pit was simulated. The results show that with the increasing of pile depth, the horizontal displacement of pile foundation is larger at the top and smaller at the bottom. The dewatering of deep foundation pit has influence on the bending moment and axial force of adjacent viaduct pile foundation, but they are in a relatively safe range. The horizontal displacement of bridge pile is negatively correlated with the distance between bridge pile and deep foundation pit, the supporting stiffness of deep foundation pit and the elastic modulus of the first layer soil.

Keywords: deep foundation pit; pile foundation; bridge pier; numerical calculation; influence parameters; Karst cave. (search for similar items in EconPapers)
Date: 2024
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