高速铁路穿越活动断裂带选线策略及工程措施

Route Selection and Engineering Measures of High Speed Railway Crossing Active Fault Zone

活动断裂带易引发地震,对高速铁路运营安全造成重大影响。为了减少活动断裂带对高速铁路的影响,以潍坊—宿迁高速铁路穿越活动断裂带为背景,阐述活动断裂带对铁路工程的危害,通过线形拟合方法,研究高速铁路通过活动断裂带的选线原则,提出高速铁路通过活动断裂带的选线策略以及震后线形修复措施。为减小震后线路修复改建长度,提高线路改建标准,当线路通过活动断裂带时,宜优先采用曲线通过,避免采用过长的曲线和长直线。宜优先采用路基、简支梁等简单易修复工程,并采取相应抗震加强措施,设置断裂带变形监测系统,确保铁路运营安全。

Active fault zone is prone to earthquakes,resulting in a significant impact on the operation safety of high speed railway.In order to reduce the impact of active fault zone on high speed railway,this paper expounds the hazards of active fault zone to railway engineering,studies the route selection principle of high speed railway crossing active fault zone through linear fitting method,and puts forward the route location strategy of high speed railway crossing active fault zone and post-earthquake route restoration measures by taking the Weifang-Suqian HSR crossing active fault zone as an example.In order to reduce the length of post-earthquake route restoration and enhance the line reconstruction standard,it is advisable to give priority to curve negotiating and avoid too long curves and long straight lines when the route passes through the active fault zone.Priority should be given to simple and easy-to-repair works such as earthworks and simply-supported beams,seismic strengthening countermeasures should be taken,and the fault zone deformation monitoring system should be set up to ensure the operation safety of railway.