Seismic damage mechanism and dynamic deformation characteristic analysis of mountain tunnel after Wenchuan earthquake

被引:221
作者
Shen, Yusheng [1 ]
Gao, Bo [1 ]
Yang, Xiaoming [2 ]
Tao, Shuangjiang [1 ]
机构
[1] Southwest Jiaotong Univ, Minist Educ, Key Lab Transportat Tunnel Engn, Chengdu 610031, Peoples R China
[2] Oklahoma State Univ, Sch Civil & Environm Engn, Stillwater, OK 74078 USA
基金
中国国家自然科学基金;
关键词
Wenchuan earthquake; Seismic damage mechanism; Relative displacement; Mountain tunnel;
D O I
10.1016/j.enggeo.2014.07.017
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
After the 2008 Wenchuan earthquake (Mw = 8.3), many mountain highway tunnels in the affected area were severely damaged. In order to improve the current knowledge about the seismic performance of mountain tunnels under strong earthquakes, a forensic investigation was conducted on 52 tunnels after the earthquake. Based on the seismic damage data, the damage level of the inspected tunnels was classified using a new damage evaluation criterion. Subsequently, typical seismic damage characteristics and mechanisms of mountain tunnels were analyzed based on three different damage patterns: damage to shallow tunnel, damage to deep-buried tunnel structure and damage to pavement. Finally, based on the relative displacement (RD) method, a three-dimensional numerical model was developed to investigate the deformation characteristics of the portal structure under a strong earthquake. The numerical results showed that the tunnel lining cross section exhibited an alternate tension-compression deformation at the diagonal directions, and the relative displacement value of the upper-structure (above the sidewall) was generally more than that of the lower-structure (under the sidewall). Three stress states of the lining were deduced from the numerical model, which provided a good interpretation for the seismic tunnel damages observed after the Wenchuan earthquake. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:85 / 98
页数:14
相关论文
共 26 条
[1]   Geological engineering problems associated with tunnel construction in karst rock masses: The case of Gavarres tunnel (Spain) [J].
Alija, S. ;
Torrijo, F. J. ;
Quinta-Ferreira, M. .
ENGINEERING GEOLOGY, 2013, 157 :103-111
[2]  
Asakura T., 2000, P JSCE JAPAN SOC CIV, V659, P27
[3]  
Communication Surveying and Design Institute of Sichuan Provincial Communication Transport Department CSDISPCTD, 2008, INV DET EV REST REC
[4]  
Cui G.Y., 2011, MOD TUNN TECHNOL, V06, P6
[5]  
DOWDING CH, 1978, J GEOTECH ENG-ASCE, V104, P175
[6]  
[高波 GAO Bo], 2009, [西南交通大学学报, Journal of Southwest Jiaotong University], V44, P336
[7]   Seismic design and analysis of underground structures [J].
Hashash, YMA ;
Hook, JJ ;
Schmidt, B ;
Yao, JIC .
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2001, 16 (04) :247-293
[8]   Failure Mechanism of Deformed Concrete Tunnels Subject to Diagonally Concentrated Loads [J].
He, Wei ;
Wu, Zhishen ;
Kojima, Yoshiyuki ;
Asakura, Toshihiro .
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING, 2009, 24 (06) :416-431
[9]  
Huang TH., 1999, Quick investigation and assessment on tunnel structures after earthquake, and the relevant reinforced methods (in Chinese)
[10]  
Itasca, 2009, SOFTW MAN FLAC3D