Model Test Research on Excavation Method of Large-span and Shallow-buried Bias Tunnel in Cobble and Gravelly Soil Layer

DOI

10.2991/ifeesm-17.2018.64How to use a DOI?

Keywords

cobble and gravelly soil; bias tunnel; model test; excavation method; large-span; shallow-buried

Abstract

In order to select reasonable excavation method of tunnel engineering in complex conditions, model test was done for large-span and shallow-buried bias tunnel in cobble and gravelly soil layer, the reasonable excavation scheme was determined by analysis of tunnel surrounding rock and internal support stress after excavation. The bench cut method and the four-partial excavation method with temporary diaphragm in top heading are adopted to excavate model tunnel. It is resulted that the reasonable excavation method is the four-partial excavation method with temporary diaphragm in top heading. The large-span and shallow-buried bias tunnel in the cobble and gravelly soil layer is excavated from the shallow excavation site and has less deformation than that of the deep excavation. Model test can correctly reflect some changes of the real formation, and some problems in the construction process can be prevented in advance.

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  - Jinsong Tang
AU  - Baolin Xiong
AU  - Chiguang Liu
PY  - 2018/02
DA  - 2018/02
TI  - Model Test Research on Excavation Method of Large-span and Shallow-buried Bias Tunnel in Cobble and Gravelly Soil Layer
BT  - Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)
PB  - Atlantis Press
SP  - 336
EP  - 343
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeesm-17.2018.64
DO  - 10.2991/ifeesm-17.2018.64
ID  - Tang2018/02
ER  -