基坑支护位移和安全性监测的动态预报

通过将现场信息采集、优化反演参数及围护结构变形和稳定分析有机地进行结合，对基坑支护位移和安全性监测建立了动态预报技术，包括提出了分析理论和方法。其基本过程是：第一步，采集现场量测信息；第二步，借助优化反演过程获得计算参数；第三步，用反演计算得到的参数预测下一步开挖的位移量及稳定性。这一方法可在基坑开挖过程中，依据现场量测信息，对基坑开挖的安全性及时作出预测和评估，从而指导施工。

DYNAMIC PREDICTION FOR DISPLACEMENT AND SAFETY OF FOUNDATION PIT

In this paper, an approach for analysing and predicting the displacement and safety of the retaining structure of pit is established. The main steps of the approach are as follows: first, gathering the information in situ; second, getting the coefficients to describe the behavior of the soil mass by optimum back analysis and third, using these coefficients to calculate and predict the displacement for next excavation step. By this approach, the safety of the excavation can be predicted and estimated in time, and therefore the construction process can be conducted successfully.