我国典型水利水电工程安全监测仪器服役完好率分析OA北大核心CSTPCD

[Objective]The service intact rates of monitoring instruments have not been systematically studied in the field of safety monitoring of water conservancy and hydropower projects.In order to deeply analyze the characteristics of the service intact rates of safety monitoring instruments in water conservancy and hydropower projects in China,and provide scientific basis for monito-ring design,instrument selection,renewal and maintenance,[Methods]this paper collected large sample data of the service per-formance of safety monitoring instruments from 12 typical water conservancy and hydropower projects in China.Through statistical analysis,correlation analysis and paired sample T test method,the intact rates of safety monitoring instruments in each project were counted,and the correlations between the overall intact rate and the duration of service were analyzed.The difference of the intact rates among the main monitoring items of monitoring instruments and the difference of the intact rates of the main monitoring quantities between the differential resistance and vibrating string monitoring instruments were tested.[Results]The result showed that the absolute value of the correlation coefficient between the duration of service of the instruments and the overall intact rate was 0.65.The significance level of the difference of the intact rates between the main monitoring items was 0.049.The intact rates of the main monitoring quantities of the differential resistance and vibrating string instruments were 78.87％and 85.36％,respectively,and the significance level of the difference of the intact rates for main monitoring quantities between the differential resistance and vibrating string instruments was 0.298.[Conclusion]The result proved that the overall intact rates of safety moni-toring instruments in water conservancy and hydropower projects have a moderate linear correlation with the duration of operation,and the difference of intact rates exits among the main monitoring items of monitoring instruments.The intact rate of seepage and seepage pressure monitoring instruments is significantly higher than that of stress-strain and temperature monitoring instruments,and there is no significant difference of intact rates for main monitoring quantities between the differential resistance and vibrating string monitoring instruments,and the intact rate of vibrating string instruments is slightly higher than that of differential resist-ance instruments.