改进的极坐标法在基坑水平位移监测中的应用研究

Study on the Application of the Improved Polar Coordinates to Horizontal Displacement Monitoring of Foundation Pits

伴随着高精度智能全站仪的推广,智能全站仪的监测方案逐步被用于基坑水平位移监测。对于狭长区域复杂环境的基坑水平位移监测,常规的监测方案存在着相应的不足。本文提出一种改进的极坐标法。该方法引入对比设站和数据后处理,可更加充分地发挥智能全站仪在基坑水平位移监测中的优势。通过在某基坑监测中的应用,发现该方法在工作基点突变(累计变形超限)时能更加实时的获取变形体的监测数据。为基坑的水平位移监测提供了一个更为合理的动态控制框架。

With the promotion of high--precision intelligent total station, the monitoring program is gradually applied to horizontal displacement monitoring of foundation pits. As for the horizontal displacement monitoring of the foundation pits in the complex envi- ronment of the long and narrow region, the conventional monitoring program has some lim- itations. In this paper, a new polar coordinate method is put forward. The contrastive loca- ted station and data post--processing operations are used in this method, which can fully take the advantages of intelligent total station. Through its application to a foundation,we found that it can get more real--time monitoring data of the deformable body when the work point mutated （or cumulative deformation overloaded）. And it provides a more accu- rate dynamic control framework for the horizontal displacement monitoring of foundation pits .