S210线轻钢结构滚石防护棚洞动力响应与优化研究
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摘要
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1 500 k J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 S210 after Lushan M7. 0 earthquake in 2013,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 S210 line. It proves that the technology has played an active role to ensure the S210 line traffic smooth. Meanwhile,the technology could be applied to the similar mountainous road which might encounter the collapses and rock-falls disasters.
Based on prevention and cure of rock-fall hazard in the life line S210 after Lushan M7. 0 earthquake in 2013,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 S210 line. It proves that the technology has played an active role to ensure the S210 line traffic smooth. Meanwhile,the technology could be applied to the similar mountainous road which might encounter the collapses and rock-falls disasters.
引文
[1]裴向军,黄润秋.“4.20”芦山地震地质灾害特征分析[J].成都理工大学学报:自然科学版,2013,40(3):257-263.
[2]程强,郑同建.芦山地震公路地质灾害调查及评估[J].灾害学,2014,29(1):131-135.
[3]沈均,何思明,吴永.滚石灾害研究现状及发展趋势[J].灾害学,2008,23(4):122-125.
[4]冉利刚,陈赤坤.高速铁路棚洞设计[J].铁道工程学报,2008(6):61-66.
[5]Delhomme F,Mommessin M,Mougin J P.Behavior of a structurally dissipating rock-shed:Experimental analysis and study of punching effects[J].International Journal of Solids and Structures,2005,42(14):4204-4219.
[6]Berthet-Rambaud P,Mazars J,Daudeville L.Impact on a RC rock-shed slab:FEM modelling[J].Computational Modelling of Concrete Structures,2006:689-698.
[7]程强,苏生瑞.汶川地震崩塌滚石坡面运动特征[J].岩土力学,2014,35(3):772-776.
[8]Parham Ashayer.Application of rigid body impact mechanics and discrete element modeling to rockfall simulation[M].Tonoto:University of Toronto,2007.
[2]程强,郑同建.芦山地震公路地质灾害调查及评估[J].灾害学,2014,29(1):131-135.
[3]沈均,何思明,吴永.滚石灾害研究现状及发展趋势[J].灾害学,2008,23(4):122-125.
[4]冉利刚,陈赤坤.高速铁路棚洞设计[J].铁道工程学报,2008(6):61-66.
[5]Delhomme F,Mommessin M,Mougin J P.Behavior of a structurally dissipating rock-shed:Experimental analysis and study of punching effects[J].International Journal of Solids and Structures,2005,42(14):4204-4219.
[6]Berthet-Rambaud P,Mazars J,Daudeville L.Impact on a RC rock-shed slab:FEM modelling[J].Computational Modelling of Concrete Structures,2006:689-698.
[7]程强,苏生瑞.汶川地震崩塌滚石坡面运动特征[J].岩土力学,2014,35(3):772-776.
[8]Parham Ashayer.Application of rigid body impact mechanics and discrete element modeling to rockfall simulation[M].Tonoto:University of Toronto,2007.
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