基于盲信息理论的土石坝安全评判方法的研究及应用

ComPrehensive Assessment Method Based on Blind Information Theory in Earth Rock Dam

由于土石坝施工及运行期坝体变形受时间因素的影响较大,常因选取的数据时间段难以确定,造成土石坝安全综合评判模型存在较大的误差。基于此,在综合评判中选取多个不同时间段的数据并赋以相应的可信度,利用盲数表达监测数据和巡视检查结果,将盲信息的数学处理运用到土石坝安全综合评判的工程实例中,并运用盲数运算法则进行盲数处理的探讨,得到了有一定参考价值的评判结果,并克服了传统的数学模型信息描述过于绝对化的问题。实践表明盲数在土石坝安全监控的综合评判中有较好的实用价值。

Deformation in earth rock dam during its construction and operation is affected greatly by the factor of time. Due to the difficulties in determining the time interval of selected data, more errors occur in earth rock dam comprehesive assessment. From this case, in the assessment, the data of several different time intervals are taken and corresponding confidence levels given, and, employing blind values to express monitoring data and perambulating inspection results, the process method of blind information is applied to the practice of comprehesive assessment. With the observation items in Xiaolangdi Project, the influence factors determing the assessment result are described in the form of blind data. The data are processed according to the blind data algorithms and some scientific and reasonable assessment results are acqired, and the process method overcomes the defect of traditional numerical model, viz.,too definitive description of information. It is verified that the blind data have good practical values in earth rock dam comprehesive assessment.