摘要
掺砾黏土广泛应用于高心墙堆石坝,掺砾黏土本构对大坝的数值模拟至关重要,但目前对于掺砾黏土本构适用性的研究较少。研究采用广义塑性模型以及邓肯E-B模型,分别标定了某300 m级高心墙坝掺砾黏土料的静力计算参数,并结合该高坝进行二维有限元静力计算,同时分析两种模型下心墙在填筑期与蓄水期的竖向变形。结果表明邓肯E-B模型参数简单,计算结果偏于安全,而广义塑性模型参数复杂,计算结果偏于精确。
Gravel clay is widely used in high core wall rock-fill dams and its constitutive models are very important to the simulation of the dams .However the applicability of these models is rarely studied .Here ,generalized plasticity model and Duncan E-B model were adopted to calibrate the static parameters of the core wall rock-fill dam with gravel clay of 300 m level .Meanwhile a two-dimensional finite element static analysis was conducted on two models to study the vertical displacements of the core wall during the filling period and operation period .The results suggest that the parameters of Duncan E-B model are relatively simple but its calculation results possess general accuracy ,while the generalized plas-ticity model parameters are more complicated but its calculation results are more accurate .
出处
《水利与建筑工程学报》
2015年第5期208-211,共4页
Journal of Water Resources and Architectural Engineering
关键词
掺砾黏土
邓肯E-B模型
广义塑性模型
心墙堆石坝
gravel clay
Duncan E-B model
generalized plasticity model
core wall rock-fill dam
