【摘要】 铁路选线设计是从源头上减轻地震灾害的根本对策。首先针对以曲线线形穿越断裂带的情况,基于破裂面错动位移、线路转向角和破裂面与线路错动一侧的夹角,导出了为减轻地震大地形变震害的线路平面预留变形量计算公式;在线路转向角不可选择的情况下,可直接运用该公式计算预留变形量;在线路转向角可选择的情况下,推导了能使废弃工程量最小的转向角最佳取值方法。然后针对以直线线形穿越断裂带的情况,分析了按原有设计标准,按困难条件下的设计标准的重建工程量,并提出了以降低速度为代价的便线修复方案,以作为减灾方案比选的参考。最后对修复线路设计时纵断面和横断面设计的注意事项进行了讨论。更多还原

【Abstract】 Railway location is one of the fundamental measures to reduce earthquake disaster.For a railway curve passing through the fault zone,a calculation formula for plane reserved deformation of the line is deduced based on rupture surface dislocation displacement,turning angle of the line and the included angle between rupture surface and the line of the dislocation side.When the turning angle of the line can not be choiced,the formula can be directly applied to calculate the reserved deformation;when the turning angle of the line can be choiced,the best value for the turning angle to reduce the waste quantities is deduced.For a straight line acrossing the fault zone,this paper analyses the reconstruction amount according to the original design under difficult conditions and puts forward a line modification program at the cost of reducing train speed as a basis for comparison and selection of mitigation options.In the end,the paper discusses the precautions in longitudinal section and cross-sectional design for the reconstruction design.更多还原