抵偿高程面法在长度投影变形控制中的应用  

Application of Compensation Elevation Surface Method in the Deformation Control of Length Projection

作　　者：梁刚[1] 李维平[1] 邵秋铭 LIANG Gang;LI Weiping;SHAO Qiuming(Chongqing Surveying Institute, Chongqing 401121, China)

机构地区：[1]重庆市勘测院,重庆401121

出　　处：《北京测绘》2021年第11期1447-1451,共5页Beijing Surveying and Mapping

摘　　要：在城市快轨、地铁、高速铁路等线路工程的测量工作中,长度投影变形的存在造成放样点与设计不符,这会给施工放样、轨道铺设等带来不便。对投影变形的规律进行了介绍,在理论基础上,通过采用改变投影高程面的方法对长度投影变形进行限制试验研究,并结合工程案例进行了分析。通过应用分析,投影改正后满足了工程的精度要求,并指出各种方法都有其优缺点,应结合实际情况确定针对性实施方案。In the surveying work of urban fast track,subway,high-speed railway and other line projects,due to the existence of Length Projection deformation,the lofting points do not conform to the design,which will bring inconvenience to the construction lofting and track laying.In this paper,the law of projection deformation was introduced.On the basis of theory,the method of changing the projection elevation plane was applied to limit the length projection deformation,and the experimental research was carried out combined with the engineering case.Through the application analysis,the projection correction could meet the accuracy requirements of the project,and advantages and disadvantages of all kinds of methods were analyzed,which demonstrated that the targeted implementation plan should be determined combining with the actual situation.

关 键 词：线路工程 长度投影 变形限制 抵偿高程面 应用效果 

分 类 号：P258[天文地球—测绘科学与技术]