基于弹塑性模型的微型抗滑桩破坏机制研究

doi:10.13722/j.cnki.jrme.2014.s2.089

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Abstract The failure mechanism of micropiles in rock-soil slope，rock slope and soil slope was obtained based on strengthen reduction and the finite difference program FLAC. Solid elements and Mohr-Coulomb ideal elastoplastic model were used for piles on the purpose of getting the failure state. The microplies getting into plastic state based on its mechanical characteristics，then the failure mechanism of micropiles from failure state，deformation and internal force were analyzed. Safety factor and failure mode of slopes reinforced by microplies are obtained. Then a model test of soil slope reinforced by micropiles is compared with its 1∶1 numerical simulation and the results conform to each other. It shows that the numerical simulation method is correct and can be utilized for slope prototype calculation. Results indicate that the failure mechanisms of micropiles in different types of slopes are completely different. For mixed rock and soil slope，bending shear failure in sliding zone and bending failure above sliding zone happens to piles. For rock slope，the failure of piles is mainly shear failure in sliding zone. For soil slope，bending failure of piles happens on both sides of sliding zone.

Key words： pile foundation micropile failure mechanism numerical simulation model test elastoplastic constitutive model three-dimensional model

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	Articles by authors
	XIN Jianping1
	2
	ZHENG Yingren1
	2
	TANG Xiaosong1
	2

Cite this article:

XIN Jianping1,2,ZHENG Yingren1, et al. RESEARCH ON FAILURE MECHANISM OF ANTI-SLIDING MICROPILES BASED ON ELASTOPLASTIC MODEL[J]. , 2014, 33(S2): 4113-4121.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.s2.089 OR https://rockmech.whrsm.ac.cn/EN/Y2014/V33/IS2/4113

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