管道
岩土工程
地质学
腐蚀
内腐蚀
工程类
法律工程学
土木工程
地貌学
堤防
机械工程
作者
Zhijie Wang,Caglar Oskay,Alessandro Fascetti
出处
期刊:Geotechnique
[Thomas Telford Ltd.]
日期:2024-03-25
卷期号:: 1-42
标识
DOI:10.1680/jgeot.23.00259
摘要
Backward erosion piping (BEP) has been recognized as a major cause of failures in water-retaining structures. However, the fundamental mechanisms controlling the phenomenon are not well understood. This research applies the theory of rate processes to develop a constitutive relationship between energy density of the seepage flow and the erosion rate of soils during the evolution of BEP. The resulting equation is used to analyze four datasets of previously reported experimental observations. The mechanical parameters estimated through the proposed model fall into the ranges of values that were reported in the literature. To validate the proposed approach, the constitutive model was incorporated into a multiphase numerical framework to simulate evolution of BEP in embankment soil and compared with reported experimental observations. The numerical framework with the proposed constitutive model is shown to be capable of reproducing both the observed evolution of local hydraulic gradients and pipe progression in the structure.
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