超站仪非固定测站法在变形监测中的应用

传统的变形监测方法都要求在测区设定固定的基准点,以此观测监测点相对基准点的相对位置来确定变形情况,而在实际工程中常常会出现无法设立稳定的基准点,或基准点丢失、遮挡观测视线等情况,这大大影响了变形监测的开展和精度。本文针对基坑变形监测中所遇到的困难结合超站仪所具有不受时间地域限制,不依靠控制网,无须设基准站,没有作业半径限制的优势,提出了采用超站仪非固定测站采集3维坐标的方法来确定监测点变形情况,很好地解决了监测过程中遇到的许多不可预见因素,提高了监测数据的时效性和精确性,降低了测量人员的劳动强度。

The Application of Superstation Non-Fixed Station Method in Deformation Monitoring

Traditional deformation monitoring methods require settling a fixed reference point in surveyed area,which can be used to determine deformation.Deformation monitoring is hindered and the accuracy thereof is reduced in a practical situation of not being able to set up stable reference point,losing the reference point and reference points’ being hidden from view.In the light of the difficulties facing the foundation pit deformation monitoring and superstation’s advantages of not being limited by time and place,not relying on control network and base station,and not being limited by operation radius,this paper puts forward a method of monitoring deformation using superstation non-fixed station method of obtaining 3D coordinates,which solve the problem of unforeseen factors in the process of monitoring,improve the effectiveness and precision of monitoring data and reduce the labor intensity of the surveyors.