Comprehensive Evaluation Of Behavioral Safety Of Concrete Gravity Dam Based On Statistical Monitoring Of Operation Data

The service state of concrete gravity dam is affected by many factors,and its working environment is extremely complicated.In the process of systematic evaluation of dam operation characteristics,it is necessary to comprehensively consider the variation law and development trend of service dam performance indicators for analysis;The numerical analysis methods and accuracy of each point effect sequence in the dam behavior index are highly correlated with the performance safety evaluation results.To this end,this paper starts from the breadth of the dam operation monitoring method and the depth of its safety assessment.From the comprehensive evaluation system of gravity dam operation performance,it is proposed to use statistical analysis,EMD decomposition,support vector machine,The cloud model and other methods pay attention to the integration of dam multi-measurement point effect,research and construct the evaluation model of concrete gravity dam operation based on EMD decomposition method and support vector machine,and take the actual monitoring data of current concrete gravity dam performance as Based on the foundation,the research on the safety evaluation of the running behavior of concrete gravity dam is carried out.The main research contents are as follows:(1)Study the deformation and seepage monitoring data that best express the safety state of the concrete gravity dam,and use the EMD decomposition method and the support vector machine method to establish the monitoring model and forecast.Through the engineering real-time example,the results are compared with the traditional monitoring methods,and the monitoring model has higher prediction accuracy.(2)Starting from the intricate operation system inside the dam,the research and exploration of various significant key influence factors selection methods in the concrete gravity dam operational performance evaluation system and the construction of the concrete gravity dam operational performance comprehensive evaluationsystem based on operational data At the same time,set the evaluation set of concrete dam behavior.(3)In view of the uncertainty of index weight and membership degree in the concrete gravity dam safety assessment system,the condition indicators partition and quantitative methods and cloud models are introduced.According to the combination of single effect quantity,the concrete gravity dam based on fitting residual is obtained.The behavioral safety judges the cloud model to analyze the service status of the dam section.