RESEARCH ARTICLE
Numerical Simulation Research of Construction Method for Shallow Buried Large Section Tunnel
Bin Zhu1 , *, Weifeng Kou2, Jiami Xi1, Yanjun Shen1
Article Information
Identifiers and Pagination:
Year: 2016Volume: 10
First Page: 578
Last Page: 597
Publisher ID: TOCIEJ-10-578
DOI: 10.2174/1874149501610010578
Article History:
Received Date: 29/11/2015Revision Received Date: 11/06/2016
Acceptance Date: 15/06/2016
Electronic publication date: 30/09/2016
Collection year: 2016
open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.
Abstract
The background of this paper is based on Deli tunnel of Xi’an to Chengdu Railway passenger dedicated line. In order to compare and optimize this large section tunnel project under different construction methods, General FEA software ANSYS was utilized to simulate and analyze the stress and deformation in 2-D and 3-D. According to the Deli tunnel engineering case, the preliminary comparison and discussion of mechanical properties and deformation characteristics of the construction of bench cut method and two side-wall pilot tunnel method have been carried out. From this simulation, we made the conclusion for different mechanical properties and deformation characteristics in different construction methods. It shows that the two side-wall pilot tunnel method results in less stress and deformation than the bench cut method. Therefore, it is safer to use the former method. The key step for bench cut method is the upper excavation, and the key step for two side-wall pilot tunnel method is the upper core soil excavation. Monitoring and enhanced support of these key areas is imperative to guarantee the smooth construction.