万家寨水利枢纽坝顶监测系统改造

万家寨水利枢纽工程为黄河中游第一级控制性枢纽工程，及时准确地监测枢纽大坝的位移变化，不仅关系大坝本身的安危，对下游河道和两岸安全、晋蒙电网的安全稳定运行都有重要意义。为控制万家寨大坝坝顶的位移变化，在坝项布置了大气激光准直系统、视准线观测系统和沉陷观测系统等三个观测项目，但此三个观测系统的测量均受外界环境影响较大，不能及时有效的监控坝顶位移变化。经过分析研究，确定在坝顶增加一套真空激光准直系统的改造方案，经过改造后，实现了坝顶自动化观测，能够及时准确监测坝顶位移变化情况。

The Improvement of Monitor and Test System of Dam Crest of Wanjiazhai Key Water Control Works

The Wanjiazhai hydro-junction project for the Yellow River middle reaches the first level of control key project,monitors the key displacement change of dam accurately and promptly,not only related to dam's safety,but also great significance to downstream river course and both banks security,Jin Mongolia electrical network's safe and steady operation.In order to control the displacement change of the Wanjiazhai top dam,it has arranged the atmosphere laser alignment system,the line of collimation observation...