以2013年芦山7.0级地震生命通道S210线滚石灾害防治为背景，在崩塌滚石灾害特征调查和研究的基础上，根据S210线应急抢险的需求，提出一种新型轻钢结构滚石防护棚洞技术：采用钢板和槽钢为主骨架，双层钢板夹EPS材料为顶板，并将顶板设为20°～25°以提高抗冲击能力。通过动力有限元数值模拟，开展滚石冲击荷载下轻钢结构棚洞动力响应机理与优化设计研究。计算结果表明：轻钢结构棚洞具有较强的抗滚石冲击能力，能承受1500 kJ滚石冲击能量，且施工方便快捷，不影响正常交通，是S210线应急保通较为理想的滚石防护措施。目前轻钢结构棚洞已在S210线滚石危险区段投入使用，效果显著，对确保震后S210线畅通和灾后重建发挥了重要作用，也可在类似山区公路滚石灾害防治中推广应用。%Based on prevention and cure of rock-fall hazard in the life line S21 0 after Lushan M7.0 earth-quake in 201 3 ,and according to the investigation on distribution and risk zoning study on the disasters,a new light steel rock-shed technology is proposed in accordance with the emergency needs of the line.Dynamic response and optimization design of the rock-shed is analyzed by dynamic finite element method.The results show that the light steel rock-shed structure,in a manner,saved the construction investment,could be constructed quickly and in the greatest degree ensure the structure safety and reliability,which gives this technology a vast prospect to ensure the road smooth after earthquake.And now the project has been completed and come into service on the road of S21 0 line.It proves that the technology has played an active role to ensure the S21 0 line traffic smooth.Meanwhile,the technology could be applied to the similar mountainous road which might encounter the collapses and rock-falls dis-asters.
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