超高层建筑工程变形监测中小角度钢尺测边交会点的精度改良  

Improvement of Precision in Deformation Measurement at Linear Intersections Using Small-angle Triangle in Skyscraper Construction

作　　者：莫南明[1] 过静珺[2] 张胜良 陆静文 

机构地区：[1]昆明学院,云南昆明650118 [2]清华大学,北京100084 [3]北京中建华海工程测绘有限公司,北京100102

出　　处：《施工技术》2008年第11期56-59,108,共5页Construction Technology

基　　金：云南省教育厅科学研究基金项目(08Y0354)

摘　　要：通过规范中的测边交会点的坐标计算公式,按误差传播规律,分析出交会点的误差计算公式。在此基础上,通过理论分析,改良小角度三角形图形强度,找出测边交会小角度三角形的最高精度的交会点,分析坐标值及其点位最高精度值。研究结果表明,改良后交会点位精度值除与最佳图形——等边三角形的交会精度很接近外,还提高了变形监测点的精度等级。同时为变形监测、控制测量、施工放样测量等工作中出现小角度三角形,为优化测量点位误差提供了一种解决问题的新途径。The author analyzes the error calculation formula of the intersection point by coordinating the formula of linear intersection point in the process of specifications of surveys according to the law of propagation of errors. In this regard the author also improves the intensity of minor angle triangle＇ s figure, and finds out the highest accuracy intersection points of minor angle triangle of linear intersection and analyzes its coordinate and accuracy. It is concluded that the accuracy of intersection point is close to the best figure, i.e., the intersection aeeumey of equilateral triangle by means of theoretical analysis after it is improved, and it also improves the accurate grade of deformation observation point. The occurrence of minor angle triangle in the field of deformation measurements, cadastral survey, control survey, construction template making measurements and other works can provide a new way to solve the problems for optimizing oosition accuracy measurements.

关 键 词：测绘工程 变形监测 小角度三角形 测边交会 点位误差 

分 类 号：TU12[建筑科学—建筑理论]