论文部分内容阅读
实测资料表明，直伸三角网与垂线系统量测的大坝水平位移位相差很大。直伸三角网用钢弦垂度量测短边的变化时，由于受气流的影响而产生很大的测量误差。只有完全消除廊道内气流的影响，才能利用钢弦作为水工建筑物水平位移的监测设施。
The measured data show that the vertical triangulation and vertical system of dam horizontal displacement measured a great difference. Straight triangulation with steel wire sag to measure the short edge of the change, due to the impact of the air flow and have a great measurement error. Only by completely eliminating the influence of the air flow in the gallery can the steel strings be used as the monitoring facilities for the horizontal displacement of hydraulic structures.