动水位作用下饱和粗颗粒土渗流多尺度耦合模拟

doi:10.13722/j.cnki.jrme.2016.1529

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Abstract

In order to obtain the perplexing response mechanism of saturated granular soils，in this paper，a fully coupled model was employed to simulate a sheet pile wall subjected to an increasing water pressure that mimics a flooding scenario，and to analyze the mesoscale pore fluid flow and microscale solid phase deformation of saturated granular soils. The fluid motion was idealized using averaged Navier-Stokes equation；the discrete element method and the linear angular momentum equation were employed to model the assemblage of solid particles. The fluid-particles interaction was quantified using established semiempirical relationships. Besides，Boltzmann method of discrete lattice was introduced to achieve Instantaneous coupling，using the similarity criterion of geotechnical centrifuge to establish a 2D coupling model. It is founded that the coupling effect between the fluid and the particles will be ongoing with the waterhead increasing，caused the upstream riverbed sedimentation and downstream uplift，until the seepage failur was happened. The model simulated the pore water at mesoscale，we can get the equipotential line，seepage velocity and seepage path；To simulates displacement and deformation of particles at microscale，such as：motion process soil particles，the porosity，critical gradient and dynamic change law of interaction force between particles，etc. The model provided an effective tool which can analyze the dynamic process of sandy soil in complicated conditions，achieve the dynamic response and simulation of among water，soil and structure.

Key words： soil mechanics coarse soil multi-scale model permeation coupling

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	Articles by authors
	MAO Haitao1
	2
	WANG Xiaoju3
	WANG Zhengcheng1
	WU Hengbin1

Cite this article:

MAO Haitao1,2,WANG Xiaoju3, et al. Seepage of saturated coarse soil multi-scale coupling simulation with dynamic water level[J]. , 2018, 37(S1): 3796-3804.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.1529 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS1/3796

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