管道
有限元法
机械
多孔介质
岩土工程
内腐蚀
围堰
材料科学
地质学
工程类
多孔性
结构工程
物理
机械工程
堤防
作者
Carlo Callari,Francesco Froiio
标识
DOI:10.1615/intjmultcompeng.2020031422
摘要
We have recently proposed a finite element formulation able to simulate the localization of propagating internal erosion in rigid porous media. In the present paper, such method is extended to deformable porous solids, in order to also model the interaction between backward erosion piping and soil movements. We present the equations governing the exchange and transport of solid and fluid mass in a saturated poro-elastoplastic solid embedding a propagating erosion conduit conveying a multiphase flow. The full set of coupled finite element equations is then obtained from the weak formulations of mechanical equilibrium and fluid mass balance. The performance of the proposed formulation is assessed through an analysis of the soil response to the progressive dewatering of a cofferdam. The hydromechanical coupling and the ability in capturing both the onset and propagation of piping are crucial for an interpretation of the limit states typically observed in these structures.
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