Influence of Shield Construction on Close-Access Pile Group Foundation of Bridge

DOI

10.2991/ifeesm-17.2018.38How to use a DOI?

Keywords

Shield Construction; Close-Access; Pile Group Foundation; Numerical Simulation

Abstract

The influence of shield tunneling on close-access existing pile group foundation of bridge has always been a difficult engineering problem. To analyze this problem, the finite difference software FLAC3D was conducted to simulate the whole process of shield crossing the adjacent pile group foundation of bridge. The distribution and variation law of ground surface settlement, as well as the deformation law and stress characteristics of pile group foundation were discussed. The research results show that: (1) The settlement of ground surface decrease with the distance close to the edge of the cap of pile group foundation due to the shielding effect of pile group foundation and constraint to soil layer; (2) The horizontal displacement of each foundation pile gradually increases, then tends to be stable during the shield crossing process, the horizontal displacement increment reach to a peak value when the shield construction in the range of 6 m before and after the foundation pile; (3) The maximum axial force in foundation pile decrease with the distance between the foundation pile and shield tunnel. The distribution of axial force in foundation pile increase with the pile depth and then decrease due to the negative skin friction induce by shield construction. (4) There are three reverse bending points in each foundation pile due to the influence of shield construction, the bending moment in foundation pile decrease with the spacing between the foundation pile and shield tunnel.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xingren Feng
AU  - Mingkang She
AU  - Baoguo Chen
AU  - Xinying Mao
AU  - Chengxuan Jiang
PY  - 2018/02
DA  - 2018/02
TI  - Influence of Shield Construction on Close-Access Pile Group Foundation of Bridge
BT  - Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)
PB  - Atlantis Press
SP  - 199
EP  - 206
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeesm-17.2018.38
DO  - 10.2991/ifeesm-17.2018.38
ID  - Feng2018/02
ER  -