摘要
Abstract
In response to the issues of low efficiency and short suitable observation periods associated with traditional leveling measurements,this study proposes the use of a precise trigonometric heighting multi-station intermediate networking method as an alternative to precise leveling for monitoring dam settlement.The measurement accuracy of this method is analyzed theoretically,and it is compared with traditional manual leveling methods through the four-station intermediate method.Results show that when using a high-precision total station TM50 for observations,if the line-of-sight distance between stations is less than 140 meters and the vertical angle is less than 25°,the precision of the four-station intermediate networked trigonometric heighting can reach±1.0 mm,meeting the second-order settlement monitoring accuracy requirements stipulated in the"Code for Building Deformation Measurement."The multi-station intermediate method can replace second-order leveling measurements for vertical displacement monitoring in hydraulic dam projects,providing significant engineering reference value for protective-type monitoring of dams.关键词
大坝沉降监测/二等水准测量/精密三角高程/多站中间组网法Key words
Dam settlement monitoring/second-order leveling measurement/precise trigonometric heighting/multi-Station intermediate networking method分类
水利科学
