汶川地震各地震烈度区公路隧道震害特征研究  

Study on Different Seismic Intensities and Earthquake Damage to Highway Tunnels in Wenchuan Area Affected by Earthquakes

作　　者：崔光耀[1] 刘维东[1] 倪嵩陟 王明年[2] 林国进[3] 

机构地区：[1]北方工业大学土木工程学院,北京100144 [2]西南交通大学土木工程学院,成都610031 [3]四川省交通厅公路规划勘察设计研究院,成都610041

出　　处：《现代隧道技术》2014年第6期1-6,共6页Modern Tunnelling Technology

基　　金：国家自然科学基金(51408008;41172250);国家十二五科技支撑项目(2012BAK09B06);西部交通建设科技项目(200831800026;200831800098)

摘　　要：文章结合汶川地震震区大量公路隧道震害资料，对各地震烈度区公路隧道震害特征进行了研究。结果表明：6度区隧道均未破坏；7度区出现落石灾害，砸坏洞门、边仰坡结构；8～11度区硬岩隧道洞身衬砌基本无震害，8度区软岩隧道洞身衬砌出现轻微开裂、渗水；9度区软岩隧道洞身衬砌开裂严重，出现网状开裂、大面积渗水，出现混凝土剥落、掉块以及二次衬砌垮塌等，洞口边仰坡出现滑塌、崩塌，堵塞洞门；10度区软岩隧道洞身二次衬砌垮塌增多；11度区软岩隧道洞身出现围岩垮塌。研究成果对进一步研究高烈度地震区公路隧道震害机理及抗震对策有着重要的意义。It is neccessary to study earthquake da mage to highway tunnels in earthquake-affected areas with different seismic intensities for scientific design and earthquake fortification. Based on the earthquake-damage information regarding highway tunnels in Wenchuan, the above-mentioned study was carried out. The results show that： a tunnel was not destroyed in the area of 6-degree seismic intensity; the tunnel entrance and tunnel slope structure were smashed by rockfalls in the area of 7-degree seismic intensity; there was almost no lining damage to a hard-rock tunnel body in the area of 8~11-degree seismic intensity; slight cracks and water penetration occurred at the lining of a soft-rock tunnel body in the area of 8-degree seismic intensity; reticular cracks and large-area water penetration, concrete spalling, falling, and secondary lining collapse occurred at the lining of a soft-rock tunnel body in the area of 9-degree seismic intensity; a tunnel portal was blocked by sliding and collapse of the slope around the tunnel entrance in the area of 9-degree seismic intensity; increased secondary lining collapse occurred at the soft-rock tunnel body in the area of 10-degree seismic intensity; and surrounding rock collapse occurred at a soft-rock tunnel body in the area of 11-degree seismic intensity. These research results are significant to further study of the ear thquake-damage mechanism and countermeasures for highway tunnels in earthquake-affected areas with high seismic intensity.

关 键 词：地震烈度区 公路隧道 震害特征 

分 类 号：U457.5[建筑科学—桥梁与隧道工程]