对称及非对称形式下点状电极单元的二维电渗固结研究

doi:10.13722/j.cnki.jrme.2020.0983

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Abstract Aiming at the calculation of the electroosmotic consolidation model with a large spacing of same nature electrodes，the concept of punctiform electrode unit is proposed according to the electrode arrangement form，and a two-dimensional electroosmotic consolidation theory of the punctiform electrode unit is established based on the punctiform electrode unit model. The governing equation is discretized by the Galerkin method，and the finite element forms of the governing equations of the electric potential field and the pore water pressure field are developed. A two-dimensional electroosmotic consolidation calculation numerical module PyEcFem is developed by Python language. The numerical simulation of the two-dimensional effect of symmetric units and the electroosmotic consolidation calculation of asymmetric units are performed，and the experimental verification is carried out. Results show that the numbers of the drainage boundaries and the number of the anodes respectively play a major role in the drainage rate in the early and later stages of electroosmosis，and that both the drainage effect and the negative pore pressure of asymmetric units are higher than those of symmetrical units. For the symmetric units，the electrode spacing ratio can describe the potential drop amplitude on the same polarity boundary，and the smaller the same polarity electrode spacing，the smaller the two-dimensional effect coefficient，obeying a negative exponential relationship. For the electroosmotic consolidation of the asymmetric units，the limitation of the drainage capacity of the units will cause the accumulation of the pore water pressure in the cathode area at the initial stage of electroosmosis，generating local positive excess pore water pressure，which will affect the change rate and the extreme value of the negative pore water pressure.

Key words： soil mechanics two-dimensional electro-osmosis consolidation theory punctiform electrode unit two- dimensional potential distribution Python scientific computation

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	Articles by authors
	YANG Xiaoyu1
	2
	DONG Jianhua1
	2
	LIU Guosheng1
	2
	XIE Yongbin1
	2

Cite this article:

YANG Xiaoyu1,2,DONG Jianhua1, et al. Study on two-dimensional electroosmotic consolidation of punctiform electrode units with symmetric and asymmetric forms[J]. , 2021, 40(7): 1491-1503.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0983 OR https://rockmech.whrsm.ac.cn/EN/Y2021/V40/I7/1491

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