Analysis for Influence of Excavation on Adjacent Existing Shield Tunnel

DOI

10.2991/mmme-16.2016.180How to use a DOI?

Keywords

Excavation; Existing shield tunnel; Soil arch effect; Pit outer disturbed zone; Surrounding rock pressure

Abstract

The horizontal earth pressure of shield tunnel affected by excavation was analyzed. Firstly, the foundation pit excavation disturbance zone boundary and the strain of level unit soil in disturbance zone were assumed. Meanwhile, the formula for calculating the horizontal earth pressure in the disturbed zone of the pit is derived. Afterwards, combined with the proposed earth pressure theory and soil arch theory, the model of horizontal earth pressure of shield tunnel consider the affected by foundation pit excavation was established. Finally, joining an engineering example, verify the rationality of the basic assumptions and theoretical deduction. The result shows that when the tunnel is located in the disturbed zone of the foundation pit, surrounding rock pressure on both sides of the tunnel will be effected, and the sides of shield tunnel near foundation pit will be larger influenced by excavation.

Copyright

© 2016, 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  - Jing Cao
AU  - Guowei Qian
AU  - Haixi Zuo
AU  - Haiming Liu
AU  - Yaliang Ren
PY  - 2016/10
DA  - 2016/10
TI  - Analysis for Influence of Excavation on Adjacent Existing Shield Tunnel
BT  - Proceedings of the 2016 4th International Conference on Mechanical Materials and Manufacturing Engineering
PB  - Atlantis Press
SP  - 751
EP  - 758
SN  - 2352-5401
UR  - https://doi.org/10.2991/mmme-16.2016.180
DO  - 10.2991/mmme-16.2016.180
ID  - Cao2016/10
ER  -