高烈度地震山区铁路减灾选线技术

发布时间：2018-03-31 22:01

本文选题：铁路选线设计　切入点：地震　出处：《西南交通大学学报》2014年06期

【摘要】：为从源头上减轻高烈度地震山区的铁路灾害,针对选线设计中廊道方案选择和空间定线,从风险调控的理念,研究了减灾选线技术.采用断裂构造地貌理论,对活动断裂塑造的地貌格局和强震灾害效应进行了综合分析,得出了廊道方案选择原则.根据波动理论,对芦山、汶川地震等表现出的地震波传播的地形效应进行分析,提出了空间定线要点.研究结果表明:逆断层下盘挠曲盆地、正断层上盘断陷盆地、走滑断层断陷盆地和拉分盆地,均是铁路廊道方案可利用的地貌单元.确定大段落线路高程时,可不考虑高程放大效应;峡谷地形线路应避免布置在地震波入射方向一侧;近场区线路应选择在地震波传播的迎坡向,远场区在背坡向;应尽量避免设置小半径曲线,凸曲线应避免设置深路堑或高大支挡工程.
[Abstract]:In order to reduce the railway disaster in the mountainous area of high intensity earthquake from the source, aiming at the selection of corridor scheme and spatial alignment in route selection design, this paper studies the route selection technology of disaster reduction from the concept of risk control.Based on the theory of fault structure and geomorphology, the geomorphological pattern of active faults and the effect of strong earthquake disaster are comprehensively analyzed, and the selection principle of corridor scheme is obtained.Based on the wave theory, the topographic effects of seismic wave propagation in Lushan and Wenchuan earthquakes are analyzed, and the main points of spatial alignment are put forward.The results show that the flexure basin in the footwall of the reverse fault, the faulted basin in the upper plate of the normal fault, the faulted basin of the strike-slip fault and the pull-apart basin are all the geomorphological units available for the railway corridor scheme.In determining the elevation of the large section of the line, the elevation amplification effect can not be considered; the canyon terrain line should be avoided on the side of the incident direction of the seismic wave; the line in the near field should be chosen in the direction of the forward slope of the seismic wave propagation, and the far field area should be in the direction of the back slope.Small radius curve and convex curve should be avoided.
【作者单位】：西南交通大学土木工程学院;高速铁路线路工程教育部重点实验室;抗震工程技术四川省重点实验室;中铁二院工程集团有限责任公司;
【基金】：国家自然科学基金重点项目(41030742) 铁道部科技研究开发计划资助项目(2011G019-B)
【分类号】：U212.32

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