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强震后,科学、快速地抢通高烈度艰险山区交通生命线是一个难点。以汶川地震灾区公路抢通工程为研究背景,对高烈度艰险山区公路震害评价等级体系及处治技术进行研究。根据公路震害的破坏特点、恢复难易程度,并结合公路抢通的原则、特点及目标,通过分别建立抢通阶段桥梁、隧道及路基震害的评价等级,最终建立了抢通阶段公路震害评价等级体系。公路A、B级震害不需处治;C级震害处治技术为:桥梁半幅限行,隧道及路基采用除危、清方;D级震害处治技术为:桥梁临时支撑或限位、桥上架桥,隧道喷混凝土或安设型钢钢架临时支护,除危、清方,岩石松动爆破;E级震害处治技术为:埋设涵管、设置槽渡、搭设便桥、硐室定向爆破及便道绕避。
After the strong earthquake, it is a difficult point to scientifically and quickly open up the traffic lifeline of high and dangerous mountainous regions. Taking the project of opening up roads in Wenchuan earthquake-stricken area as a research background, the paper studies the evaluation system of grade and method of seismic hazard assessment of high-mountainous and dangerous mountainous areas. According to the damage characteristics of highway seismic damage and the ease of restoration, combined with the principles, characteristics and objectives of road opening, through the establishment of the evaluation levels of the bridge, tunnel and subgrade damage respectively, Harm rating system. Highway A, B-class earthquake damage without treatment; C-class earthquake damage treatment technology: bridge half line limit, the tunnel and subgrade used in addition to dangerous, Qing Fang; D-class seismic damage treatment technology: bridge temporary support or limit, Bridge, tunnel sprayed concrete or installed steel temporary support, except for danger, Qing Fang, rock loose blasting; E-class earthquake damage treatment technology: buried culverts, set the trough, set up the bridge, directional blasting and bypass around the tunnel avoid.