拟稳平差在基坑变形监测中的应用

Application of Quasi-stable Adjustment in Deformation Monitoring of Foundation Pit

在探究基坑变形监测网的真实形变时,拟稳平差在控制点稳定性判断上发挥了重要的作用。针对传统平差中起算数据不足的缺陷,该项目以北京通州某基坑变形监测网为例,应用秩亏自由网平差和假设性检验方法对选取的拟稳点进行拟稳平差研究,并将2种方案得出的各点的形变量进行对比分析。结果表明,利用基准点作为拟稳点的方法相较于秩亏自由网平差选取拟稳点的方法,更具有准确性、高效性的优势,能够为基坑变形监测数据处理提供参考。

When exploring the actual deformation of the foundation pit deformation monitoring network, the pseudo-stability plays an important role in the stability judgment of the control point. In view of the shortcomings of the initial adjustment data in the traditional adjustment, a foundation pit in tongzhou was taken as an example, and the quasi-stable stability of the rank-deficient free network adjustment and hypothesis test was used to calculate the quasi-stationary adjustment. The results show that the reference point as the quasi-stable point compared with the rank-deficient network adjustment method has the advantages of accuracy and high efficiency, and also provides reference for the data processing of the foundation pit deformation monitoring.