长兴岛防汛堤防工后水平位移监测技术总结

摘要:

江、湖、河、海的堤防附近往往存在很多树木或者建筑设施，堤防水平位移的监测采用GPS时，信号容易受到水面和周边树木或建筑设施的遮挡影响，而以堤防以外较远区域的基准网为定向设站点，采用全站仪坐标法、交会法、极坐标法、视准线法同样受到遮挡限制。设置临时工作基点，采用自动全站仪多测回测角测量导线的方法可以解决该问题。

Abstract:

There are often many trees or building facilities near the embankments of rivers, lakes, rivers and seas. When GPS is used to monitor the horizontal displacement of the embankments, the signal is easy to be blocked by the water surface and the surrounding trees or building facilities. When setting stations with the reference network in the far area outside the embankments as the orientation, the total station coordinate method, intersection method, polar coordinate method and collimation line method are also blocked. This problem can be solved by setting the temporary working base point and using the method of automatic total station to measure the traverse with multiple back angles.