允楞水库大坝渗流异常特性有限元反演分析

摘要

The seepage lines of dam in Yunleng Reservoir are abnormal.For evaluating dam stability,the seepage characteristics of dam need to be analyzed accurately.A three-dimensional seepage calculation model is established for the dam on the basis of actual seepage line measurements and on-site hole-drilled water injection test results.The model is used for the back analysis to determine the permeability coefficient of each zone in dam and to evaluate the stability of dam.The comprehensive analyses show that the three-dimensional model based on observed date can objectively reflect dam seepage flow and stability characteristic,and provide a theoretical basis and analysis method for the stability evaluation of roller compacted earth dam.%允楞水库大坝浸润线异常,为了准确评价大坝的稳定状况,需要对其渗流特性作出准确分析.分析允楞水库大坝多组实测浸润线及现场钻孔压注水试验成果,建立大坝三维模型,反演大坝各区的透水性指标,以此对大坝进行稳定性评价.经综合分析,在实测资料条件下建立的三维模型能客观地反映大坝的渗流及稳定特性,为碾压土石坝的稳定评价提供理论依据和分析方法.