心墙掺砾黏土料静力本构模型的对比分析  

Comparison and Analysis of Static Constitutive Models on Gravel Clay Used in Core walls

作　　者：李云清[1] 邹德高[1,2] 董博文[1] 

机构地区：[1]大连理工大学水利工程学院,辽宁大连116024 [2]大连理工大学海岸和近海工程国家重点试验室,辽宁大连116024

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

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 .

关 键 词：掺砾黏土 邓肯E-B模型 广义塑性模型 心墙堆石坝 

分 类 号：TU442[建筑科学—岩土工程]