Research On Monitoring And Comprehensive Evaluation Of Gravity Dam Based On Cloud Model

Whether the reservoir Dam is in the construction period or in the service period,the primary consideration is its safety problem.Only under the premise of dam safety,can we make better use of its economic and social benefits.In the actual operation process,the monitoring data obtained by monitoring means is the most direct manifestation of the operation state of the dam,and it is also the most realistic reflection.Therefore,the analysis of monitoring data can grasp the operational state of the dam,and on this basis,the establishment of the dam safety monitoring model and comprehensive evaluation model can further ensure the safe operation of the dam,and its software realization,convenient dam management.Therefor,taking Shuidong concrete gravity dam as an example,the following research is carried out in this paper:(1)Analysis of dam monitoring data.This paper mainly analyzes the time-history and spatial variation law of the monitoring quantity,probes into the change process of its eigenvalue,and analyzes the correlation between the effect quantity and the environmental quantity,and probes into the mutual influence law between them.The results showed that the upstream water level was lower in flood season and higher after flood,the interannual variation of rainfall was large,and the distribution was uneven during the year,and the horizontal displacement was obviously changed by the influence of temperature change and upstream water level,and the maximum positive displacement of dam top was mainly in the lower temperature season and the upstream water level.The maximum value of negative displacement mainly appears in the season with higher temperature,when the upstream water level is higher,the change law of vertical displacement is raised at high temperature,the sinking at low temperature,the measurement of vertical displacement and horizontal displacement increases with the increase of water level,and the seepage quantity is affected by water level and temperature,which is the small seepage quantity in high temperature period;The seepage of dam body around the dam is stable;the uplift pressure tends to stabilize.(2)This paper introduces the analysis methods of commonly used monitoring data,emphatically introduces the modeling principle and process of partial least squares method,and analyzes the causes and harms of multiple collinearity problems.Combined with the actual situation of the dam,the safety monitoring model is established by selecting reasonable influence factors.The results show that the partial least squares model has higher accuracy and stronger reliability.(3)This paper introduces the advantages of cloud model theory and cloud model,and on the basis of monitoring data,uses cloud model to modeling the monitoring index of Shuidong Dam,and formulates the safety monitoring index according to "3En Criterion and" weak peripheral element ".The results show that the measured values are smaller than the safety monitoring indexes except the maximum values,and the vertical displacement of the dam is within the safe range.The dam crack opening and closing degree is within the safe range;The maximum leakage of the dam exceeds the proposed monitoring index,and most of the remaining measurements are smaller than the monitoring index except the maximum value;The seepage value of the bypass dam exceeds the monitoring index.(4)This paper introduces the basic principle and steps of AHP,the basic principle of Dematel method,introduces Dematel method to optimize the calculation of weight in view of some defects of analytic hierarchy process,and establishes the evaluation system of safety operation of Shuidong concrete gravity Dam according to the construction principle of actual engineering situation and evaluation system;The membership degree of the corresponding evaluation index is determined by using the cloud model theory,and the fuzzy operation is used to evaluate the Shuidong concrete gravity dam comprehensively.The evaluation results of Shuidong Dam are consistent with the actual situation of the dam,which shows that the evaluation method in this paper is reasonable and feasible.(5)The software realization of dam comprehensive evaluation system is introduced.This paper mainly introduces the software realization from the following aspects: construction background,system goal and content,construction main work content,system architecture,design framework,module structure,software realization technology structure,database subsystem,security evaluation forecast,and practical engineering to give the concrete operation method and interface display.