作　　者： ; ; ; ; ;

机构地区： 教育部

出　　处： 《西南交通大学学报》 2010年第3期336-340,350,共6页

摘　　要： 为探讨线路与断裂走向交角对青藏铁路路基的影响,统计了青藏铁路与154条断裂相交的角度,用软件Arcgis中的反距离加权插值法（IDW）和有限元分析软件ANSYS,对线路与活动断裂的相交进行了模拟.根据IDW的模拟结果,0°～40°相交时,断裂影响系数多在0.5以上,均值较大;而50°～90°相交时,影响系数分布较均匀,均值较小.ANSYS的模拟结果显示：0°～40°相交时,交角对路基相对位移均值的影响较大;而50°～90°相交时,交角对路基相对位移均值的影响较小.研究结果表明,断裂分布较多的地区,铁路选线时应尽量使线路与断裂走向相交的角度大于40,°以减小断裂对路基的危害. To investigate the influence of intersection angle between railway route and fault strike on roadbed of the Qinghai-Tibet railway,a statistic for 154 faults intersecting with the Qinghai-Tibet railway was carried out.With the inverse distance weighted interpolation method（IDW） and software ANSYS,the intersection of roadbed and active faults was simulated numerically.From the IDW simulation result,the influencing coefficient is mainly above 0.5 when the intersection angle is between 0° and 40°;while the influencing coefficient distributs evenly and its average is small when the intersection angle is from 50° to 90°.From the ANSYS simulation result,the intersection angle has a great influence on the relative displacement of roadbed when it is between 0° and 40°;while the intersection angle has a small influence on the relative displacement when it is between 50°and 90°.The research results show that in the sections with many faults,the intersection angle should be over 40° to reduce the influence of faults on the roadbed of a railway.

关 键 词： 青藏铁路 活动断裂 相交角度 反距离加权插值法 模拟分析

领　　域： [天文地球] [天文地球]