小直径钢管排桩加固边坡的离心模型试验

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Abstract As a new retaining structure，the small-diameter steel pipe anti-sliding pile is used extensively for slope reinforcement and landslide control，but its some behaviors，such as anti-sliding characteristics，force mechanism and failure mode，etc.，need to be further studied. Combining with a specific engineering，centrifugal model tests of small- diameter steel pipe row piles are used to investigate the effects of slope failure mode，stress condition，pile spacing and connection beams on slope anti-sliding capacity. The results show that the model slope in each group suffers overall structure failure，and sliding surface can be observed clearly only in slopes without reinforcement. The anti-sliding mechanism of this kind of structures represents the geological improvement by high-pressure grouting and cooperative anti-sliding activity by piles and rock-soil composite structure. The main failure mode of this kind of structure is overall instability caused by axial tension and compression. The anti-sliding capacity of row piles is affected dramatically by pile spacing. The relationship between the ratio of pile spacing to pile diameter(L/) and factor of safety of slope is a power function，and the value of L/ of this type of row piles is recommended to be 6–12. Soil pressures behind piles increase with the increasing depth first and then decrease，and they approximately present a triangular distribution above the sliding surface. For the triple-row pile structure with connection beams，the bearing capacity of pile B decreases with the increase of acceleration，while that of pile C is on the contrary. The factor of safety of slope increases by 38.3% under the action of connection beams.

Key words： slope engineering small-diameter steel pipe piles row piles centrifugal model test failure mode mechanical characteristics

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	Articles by authors
	XIANG Bo1
	2
	MA Jianlin1
	HE Yunyong1
	ZHU Lin1
	ZHANG Zhengyi1

Cite this article:

XIANG Bo1,2,MA Jianlin1, et al. CENTRIFUGAL MODEL TEST OF SLOPE REINFORCED BY SMALL-DIAMETER STEEL PIPE ROW PILES[J]. , 2012, 31(S1): 2644-2652.

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https://rockmech.whrsm.ac.cn/EN/Y2012/V31/IS1/2644

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