中间法短视距精密三角高程在高层平台沉降监测中的应用

Application of Short-range Precise Trigonometric Leveling Via Midway Station in Settlement Observation on High Platform

在电厂建设过程中,以二等水准从地面水准点联测高层平台沉降监测点,往返测多个测站需经过人来人往又狭窄的楼梯,不但效率低下,而且来往人员还可能碰动仪器。为此,提出以中间法短视距精密三角高程代替二等水准,通过平台窗口直接传递高差。结合某电厂沉降监测工程,以此种三角高程联测高层平台沉降监测点。结果表明,中间法短视距精密三角高程测量效率较高,在适当条件下精度满足要求,具有可行性。

During the construction of a power plant the settlement monitoring points of the turbine high platform are measured from the ground benchmarks by second-order leveling,the many stations have to be set up via busy and narrow stairs.Not only the efficiency is low,but also the level may be touched by many persons coming and going.So a measurement method is proposed.The elevation difference from the ground to the high platform is transmitted directly through window by the precise trigonometric leveling with short line-of-sight and midway method.Based on this kind of trigonometric elevation,the settlement monitoring points of high platform are jointly measured in a power plant.The result shows that it is more efficient and feasible under suitable conditions.