平面四参数法坐标转换在圆形基坑变形监测中的应用

由于基坑工程的监测工作往往会受到开挖深度、设计形状等各方面因素的影响和制约,导致监测方法和手段也不能一成不变。基于虚拟断面法仅适用于比较规则的多边形基坑,本文结合珠海市横琴新区基坑工程实例,提出使用平面四参数坐标转换法在圆形基坑中对基坑立柱水平位移计算的应用。结果表明:使用平面四参数坐标转换法计算基坑水平位移时,既不受基坑形状的影响,也能更直观地反映出基坑水平位移的变形量。

Application of Plane Four-parameter Coordinate Transformation in Circular Foundation Pit Deformation Monitoring

Because the monitoring work of foundation pit engineering is often affected and restricted by various factors such as excavation depth and design shape,the monitoring methods and means cannot be changed.Polygon foundation pit based on virtual section method only for comparison rules,this paper combines the example of foundation pit engineering in Hengqin New District of Zhuhai City,the application of planar four-parameter coordinate transformation method to the calculation of horizontal displacement of foundation pits in circular foundation pit is proposed.The results show that when using the planar four-parameter coordinate transformation method to calculate the horizontal displacement of the foundation pit,it is not affected by the shape of the foundation pit,and it can more intuitively reflect the deformation of the horizontal displacement of the foundation pit.