越岭地段铁路客运专线测量长度综合变形处理新方法探讨  

Discussion on methods of integrated length deformation in long vertical slope segments

作　　者：张先文[1] 

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《工程勘察》2013年第1期68-72,共5页Geotechnical Investigation & Surveying

摘　　要：本文通过分析影响长度综合变形因素,理论提出区域新建参考椭球方案和具体建立办法;通过西安至成都客运专线翻越秦岭地段常规方式和新建参考椭球分带实例比较,得出新建参考椭球方法解决长度综合变形、减少分带的效果显著。新建参考椭球减小了各点大地高差和经度差,更好地与测区吻合;平移、旋转参考椭球过程中,未改变各点空间相对关系,精度未损失;新旧参考椭球下坐标可自由转换,因此新建参考椭球很好解决了长度综合变形问题。By analyzing the factors impacting on the integrated length deformation,the method and the specific processes of the establishment of the reference ellipsoid are proposed.By comparing the results of the new built ellipsoid with that of the conventional method in the Xi′an to Chengdu Passenger Dedicated Line crossing Qinling zone,the conclusion can be drew that the new built reference ellipsoid can solve the problem of integrated deformation in length and reduce the number of the projection zones.The new built reference ellipsoid reduces the differences of the geodetic height and longitude of each point,which is better coincide with the conditions of the survey area.In the processes of translation and rotation of the reference ellipsoid,the spatial relationship of each point is not changed,and therefore without any accuracy loss.The coordinates can be freely transformed between the old and the new reference ellipsoid,so the built new reference ellipsoid is a good solution to the problem of the integrated deformation in length.

关 键 词：长度综合变形 新建参考椭球 

分 类 号：U212.24[交通运输工程—道路与铁道工程]