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

Authors: Haitao Wang; Mingyang Xu; Tao Guo; Minghua Cui; Jiangtao Tian

Addresses: Dalian Jiaotong University, Dalian Liaoning 116028, China ' Dalian Jiaotong University, Dalian Liaoning 116028, China ' Dalian Jiaotong University, Dalian Liaoning 116028, China ' Dalian Jiaotong University, Dalian Liaoning 116028, China ' Dalian Jiaotong University, Dalian Liaoning 116028, China

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.

DOI: 10.1504/IJCIS.2024.138790

International Journal of Critical Infrastructures, 2024 Vol.20 No.3, pp.288 - 307

Received: 28 Jul 2022
Accepted: 15 Nov 2022
Published online: 31 May 2024 *

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