During The Construction Of Large Hydraulic System Monitoring Data Analysis And Stability Evaluation

During the construction period, the safety monitoring of large water conservancy and hydropower project for engineering safety stability plays a very important role. The analysis of monitoring data and engineering stability throughout the project each phase. For the construction period, the surrounding of engineering is very complicated, so the preprocessing of monitoring data appears more necessary. At the same time, the quantitative analysis of engineering stability is also difficult to achieve. This paper comprehensive introduction the preprocessing methods and measures of monitoring data, and a settlement model for dam conducts sedimentation analysis in filling stage, has been established. In the end, for the stability analysis of the3#diversion tunnel of NuoZhaDu Hydropower Station make qualitative fuzzy assessment.In this paper, the main research contents are as follows:(1)In the preprocessing of monitoring data, some measures are summarized for preventing human factors, which leading to monitoring data errors. Wavelet analysis is presented which can be used for data reduction, The identification methods of abnormal value for data are analyzed and summarized, the outlier and mutation are distinguished combined with the engineering application. The three kinds of monitoring data mending methods are put forward, and mending the data by using the regression analysis and RBF neural network model.(2)In the establishment of model, which used for monitoring data’s research. In the construction period, combine with engineering practice of Nuozhadu Hydropower Station Dam’s Section C, for selecting the settlement model factors and the model use the stepwise regression method. The time-space model、space model and equivalent model are established and analysis. Draw the best settlement monitoring model for the construction period are time-space model equivalent model.(3)In the stability assessment of researching underground caverns, use AHP for analysis the factors’weight that affect stability, and has carried on the qualitative analysis, establish the fuzzy evaluation model for stability analysis. For the3# Diversion Tunnel of Nuozhadu Hydropower Station, evaluate its stability and the result is stable.