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Study of the Earthquake Damage Mechanism and Aseismatic Countermeasure of a Highway Tunnel Portal Section in the Wenchuan Seismic Disaster Area
(1 School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031;
2 Highway Planning, Survey, Design and Research Institute, Sichuan Provincial Communications Department, Chengdu 610041)
Abstract Earthquakes destroyed a tunnel portal section in the earthquake region of Wenchuan, and this seriously affected the lifeline engineering of this seismic area. This study focuses on the mechanism of earthquake damage in order to improve the seismic capacity of highway tunnel portal sections and summarizes earthquake damage information regarding highway tunnel portal sections. Results show that earthquake damage to tunnel portal structures, slopes around the tunnel entrance and opencut tunnels are mainly attributable to seismic inertial force, and the damage of the soft rock tunnel lining structure was caused by seismic inertial force and forced displacement. According to the mechanism of earthquake damage to highway tunnel portal sections, corresponding countermeasures are presented. These results are important to the further study of earthquake damage mechanisms and earthquake countermeasures for highway tunnels in highly seismic areas.
Abstract：
Earthquakes destroyed a tunnel portal section in the earthquake region of Wenchuan, and this seriously affected the lifeline engineering of this seismic area. This study focuses on the mechanism of earthquake damage in order to improve the seismic capacity of highway tunnel portal sections and summarizes earthquake damage information regarding highway tunnel portal sections. Results show that earthquake damage to tunnel portal structures, slopes around the tunnel entrance and opencut tunnels are mainly attributable to seismic inertial force, and the damage of the soft rock tunnel lining structure was caused by seismic inertial force and forced displacement. According to the mechanism of earthquake damage to highway tunnel portal sections, corresponding countermeasures are presented. These results are important to the further study of earthquake damage mechanisms and earthquake countermeasures for highway tunnels in highly seismic areas.
CUI Guang-Yao-1,
Wang-Ming-Nian-1,
Lin-Guo-Jin-2 etc
.Study of the Earthquake Damage Mechanism and Aseismatic Countermeasure of a Highway Tunnel Portal Section in the Wenchuan Seismic Disaster Area[J] MODERN TUNNELLING TECHNOLOGY, 2011,V48(6): 6-10
2011, Vol. 48 