Information Fusion Model For Monitoring And Inspection Of Long-distance Water Diversion Project And Application In Structural Safety Evaluation

Long-distance water diversion project can effectively solve the problem of uneven spatio-temporal distribution of water resource in China.This kind of project has the characteristics of long water transmission line,wide cross-domain scale,various kinds and quantities of buildings,complex geographical environment and difficult operation and management.At present,the structural safety evaluation of long-distance water diversion project mainly comes from the safety monitoring data based on sensor monitoring and the manual inspection information.These two kinds of information have advantages,but also have disadvantages.It is difficult for evaluating the structural safety to be an ideal data source of long-distance water diversion engineering.Based on this,in order to timely and accurately grasp the structural safety status of the long-distance water diversion project during operation,provide scientific decision-making basis for the operation management of the project and ensure the long-term stable operation of the project,two kinds of data sources is integrated processing and analysis,monitoring and inspection information fusion model is constructed,and was applied to the evaluation of water diversion engineering structure safety.The main research contents of this paper are as follows:(1)Research on information fusion model of long-distance water diversion project.Firstly,through the introduction,analysis and comparison of several information fusion functional models,the JDL model is applied to the safety state evaluation process of long-distance water diversion engineering structure,and the feedback mechanism is introduced.Then the information fusion structure of safety state evaluation of long distance water diversion project is divided into three levels and the corresponding system structure is designed.Finally,according to the designed functional model and architecture,a monitoring and inspection information fusion model for safety state evaluation of long distance water diversion project is constructed.(2)The fusion processing of monitoring and inspection information.The safety monitoring data and manual inspection information are analyzed and processed respectively.Aiming at the safety monitoring data,the single-point error and multi-point continuous error are processed and de-noised by the data-level fusion analysis method,and the reliable data are obtained.According to the manual inspection information,the feature level fusion analysis method is adopted to conduct the classification processing and evaluation parameter fusion,and the more reliable and easy to evaluate data is obtained.(3)Construction of structural safety evaluation index system for typical buildings in water diversion project.This paper summarizes,sorts out and analyzes the common risk sources of various kinds of buildings in long-distance water diversion engineering,and based on thisestablishes a four-layer index system of long-distance water diversion engineering buildings according to certain index selection principle and hierarchical structure.(4)Study on the theory and method of structural safety evaluation in long-distance water diversion engineering.By using decision level fusion analysis method in information fusion,the index system constructed is evaluated comprehensively.Firstly,the security evaluation level of the underlying index is determined.Secondly,the method to determine the membership of monitoring section and inspection item in the third layer(sub-layer)of the index system is designed.Then,AHP-Entropy weight method is used to determine the relative weight of evaluation indexes at different levels.Finally,the multi-level fuzzy comprehensive evaluation of the safety status of various buildings in long-distance water diversion project is carried out to obtain the real-time safety status of safety evaluation factors.(5)Development of safety risk assessment and early warning disposal system for long-distance water diversion project.By adopting Mysql type database and B/S architecture,a comprehensive evaluation system that integrates data collection and analysis,comprehensive evaluation management,hazard warning and forecasting,dangerous emergency response,and emergency business management is developed.The system realizes the effective integration of multi-source information,the evaluation of engineering structure safety status and the dynamic safety early warning and emergency disposal of engineering operation process.Taking an inverted siphon project as an example,the safety state of the structure during its operation is comprehensively evaluated,which verifies the rationality and practicability of the proposed method.