基于Rankine模型的墙体位移–土压力近似计算

doi:10.13722/j.cnki.jrme.2016.0663

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Abstract The magnitude of the lateral earth pressure against wall depends on the wall movement. The soil behind a wall approaching the active or passive earth pressure state from initial state is considered as the shearing process of soil sample in the simple shear test. The geometric relationship between the shear strain of soil and the wall displacement，the equilibrium equation between the earth pressure and the shear stress of soil，and the constitutive relationship between the shear strain and the shear stress of soil were used to derive the expression of the wall displacement with lateral earth pressure. The wall displacement reaching the limit state of earth pressure increases with the ultimate shear strain of soil and the scope of failure zone. The required displacement decreases with k0(rest earth pressure coefficient) from the initial to the active state，but increases with k0 from the initial to the passive state. The relationship between the wall movement and the lateral earth pressure macroscopically describes soil stress-strain behavior. The calculated displacement required to reach the active state for the cohesionless and cohesive soils are about 0.6‰–15.0‰ of H，and to reach passive state which are about －0.5%–－5.9% of H，where H is the height of the wall. The estimated wall displacement-earth pressure curves agree reasonably with the model test results from the relevant literatures.

Key words： soil mechanics wall displacement earth pressure Rankine earth pressure model shear stress-shear strain behavior

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	Articles by authors
	XIE Tao1
	2
	LUO Qiang1
	2
	ZHANG Liang1
	2
	LIAN Jifeng1
	2

Cite this article:

XIE Tao1,2,LUO Qiang1, et al. Calculation of displacement-dependent lateral earth pressure based on Rankine earth pressure model[J]. , 2017, 36(5): 1279-1288.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2016.0663 OR http://www.rockmech.org/EN/Y2017/V36/I5/1279

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