Numerical Simulation of Failure Pattern of Overlying Soil during Vertical Jacking Construction

DOI

10.2991/mmsta-19.2019.2How to use a DOI?

Keywords

vertical jacking; overlying soil; failure characteristic; influencing factor; discrete element simulation

Abstract

In order to clarify the failure characteristics and influencing factors of overlying soil during vertical jacking, using secondary development of discrete element program to simulate the construction process of vertical jacking, which reveals the failure mechanism, scope and development path of the overlying soil in the process of vertical jacking. The simulation results were compared with the test results and the influence of different factors on soil failure were discussed. The results show that the shear breakage of the overlying soil has nonlinear characteristics and the existing works assume that the breakage linearly distributes along a specific dip angle is insufficient. The failure range of the overlying soil is significantly larger than the empirical value, indicating that the failure range of the existing research is inaccurate. In vertical jacking, the overlying soil experiences the process of compressive shear, failure crack, fracture extension, breakage penetration, fracture expansion, formation of overlying soil column, soil redistribution , filling of cracks. The failure range of overlying soil decreases linearly with the increase of jacking speed and has a linear relation with the cohesion force and friction angle.

Copyright

© 2019, 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  - Zhengyuan Xiong
AU  - Chunshan Yang
PY  - 2019/12
DA  - 2019/12
TI  - Numerical Simulation of Failure Pattern of Overlying Soil during Vertical Jacking Construction
BT  - Proceedings of the 2019 2nd International Conference on Mathematics, Modeling and Simulation Technologies and Applications (MMSTA 2019)
PB  - Atlantis Press
SP  - 7
EP  - 11
SN  - 2352-538X
UR  - https://doi.org/10.2991/mmsta-19.2019.2
DO  - 10.2991/mmsta-19.2019.2
ID  - Xiong2019/12
ER  -