Multi-index evaluation criterion for operation safety of the canal in water diversion project
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Abstract:
The safety of water diversion project is a public safety problem related to the national economy and people's livelihood,and the monitoring index is the scientific criterion to ensure the project operation safety.The quantitative monitoring index defined the safety boundary in the form of numerical value and tendency of the monitoring effect variables,but it focused on a single monitoring point and the local behavior.It was difficult to monitor the overall safety behavior of the canal by the quantitative monitoring index for a single monitoring point because the line of the canal was too long,and the construction and operation conditions of canal ware complex in water diversion project,so it is necessary to establish the qualitative evaluation criteria to provide a scientific basis for canal safety evaluation based on multi-source information. The abnormal phenomenon of a single monitoring point was the basis of establishing qualitative evaluation criteria,to be summarized as monitoring value,variation process,variation trend,and variation regularity.The abnormal value of a single monitoring point did not mean the operation behavior of the monitoring section or the monitoring area were abnormal.To assess the overall operation behavior of the canal,multi-point information was used in combination.The qualitative evaluation criteria of canal safety with multi-point information were established based on the study of the correlations of monitoring information among different monitoring points on the same monitoring section or monitoring area,which included the correlation in abnormal performance and distribution of multi-monitoring points. Deformation,seepage,stress,and strain ware occur under the action of various load combinations during the operation of the canal,and these effect variables described the operation behavior of the canal from different angles.The qualitative evaluation criteria of canal safety with multi-monitoring effect variables information were established based on the analysis of interaction and mutual influence and the study on the correlations among different effect variables. The qualitative evaluation criteria of canal safety with the information from field inspection were established based on the analysis of the working mechanism of the canal with different characteristics and the study on the outward manifestation of the working mechanism.The qualitative evaluation criterion was an important form of safety monitoring index of the canal and played a specially important role in canal safety monitoring.Operation safety of the canal in water diversion projects can be more safeguarded by the combination of qualitative safety evaluation criteria and quantitative numerical monitoring index.
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