斜坡基底软土桩–网复合地基变形特性离心试验研究

doi:10.13722/j.cnki.jrme.2017.0236

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Abstract Centrifuge test modeling a typical project of coastal railway line was conducted in order to study the deformation characteristics of pile-geogrid composite foundation in soft soil underneath the slope. The vertical and horizontal movements and the differential settlement of the embankment surface keep increasing during the operation period. The majority amount of the vertical and horizontal movements of the embankment surface was developed during the construction period，while the majority amount of the differential settlement was developed during the operation period. The lateral movement of the soft ground surface is constrained by the geogrid- reinforcement. The horizontal and vertical deformation in soft ground at the side of slope base is larger than the other side，thus an asymmetric settlement basin appears. The vertical and horizontal movements at the head of platform piles are less than that of slop piles and floating piles. The platform piles are under bending and tension or bending and shear deformation，the piles in slope experience the inclination deformation，and the floating piles experience the inclination deformation and lateral movement. The piles pierce upwards into the geogrid reinforcement and downwards into the underlying stratum，and the muddy clay between the slope piles flows around the piles laterally like fluid.

Key words： pile foundations slope base soft soil centrifuge model test pile-geogrid composite foundation deformation characteristics

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	LIU Feicheng1
	2
	ZHANG Jianjing1
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Cite this article:

LIU Feicheng1,2,ZHANG Jianjing1, et al. Centrifuge test on deformation characteristics of pile-geogrid composite foundation in soft soil under slope[J]. , 2018, 37(1): 209-219.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.0236 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/I1/209

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