【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。更多还原

【Abstract】 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.更多还原