变附加应力条件下考虑桩体二维井阻作用的复合地基固结解析理论研究

doi:10.13722/j.cnki.jrme.2016.0469

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Abstract A new solution for consolidation of composite ground was proposed by adding a quadratic polynomial to the previous solution. The analytical consolidation solution of composite ground considering the effect of two-dimensional well resistance was obtained for granular column under the condition of the additional ground stress varied with time and depth. The solution was compared with the previous simplified analytical expressions. The results show that many previous expressions are the special cases of the solutions deduced in this paper，such as the solution considering the effect of two-dimensional well resistance under the effect of instantaneous loading， the solution considering the seepage and vertical deformation of pile body as well as the Terzaghi one-dimensional consolidation solution，which indicate the correctness and reasonability of the solution obtained. The consolidation rate is increased with the increasing of loading rate and decreased with the increasing of additional stress at the bottom of the ground. The consolidation rate considering the two-dimensional well resistance of the columns is slower than the one considering only the vertical well resistance. The difference of the consolidation rates under the conditions of these two considerations is increased with the decreasing of permeability coefficient of column and the radius ratio of the influence zone to the column. The solution proposed in this paper provides a new idea for solving the consolidation process of composite foundation and contributes to the development and improvement of consolidation theory of composite ground.

Key words： foundations;composite ground;stress varied with time and depth;two-dimensional well resistance analytical solution

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	Articles by authors
	GUO Biao
	CHEN He
	LI Yajun

Cite this article:

GUO Biao,CHEN He,LI Yajun. Analytical study on consolidation of composite ground considering two- dimensional well resistance under time and depth dependent stresses[J]. , 2017, 36(3): 754-761.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2016.0469 OR http://www.rockmech.org/EN/Y2017/V36/I3/754

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