预应力管桩地基高路堤中土拱演化特征现场试验

doi:10.13722/j.cnki.jrme.2021.0034

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Abstract It is relatively feasible to use PHC pipe pile composite foundation for constructing high embankments of more than 30 m in mountain basins and ravines with soft soil layers. The development and evolution characteristics of the soil arch of high embankments on soft ground strengthened with PHC pipe piles are studied through field tests. The results show that：(1) The distribution of the base pressure of the embankment affects the bearing mode of the foundation reinforced by PHC pipe piles. The uneven distribution of the base pressure will produce relatively large earth pressure between piles，which will lead to that the load of some parts is greater than the bearing capacity of the natural foundation. The pipe pile group can increase the bearing capacity of the soil layer between piles. (2) The compaction of the soil at the pile tip causes the stress relaxation of the pile top and increases the pressure on the soil between piles. Under high load，the phenomenon of pile tip penetration will occur，and the settling rate of the piles is higher than that of the soil between the piles. (3) The development and evolution characteristics of the soil arching in pipe pile composite foundation embankment are determined by load level and bearing stratum conditions. The penetration of the pile tip will lead to the temporary disappearance of the soil arch，which results in the local shear failure of soil between piles，aggravates the overall shear deformation of the foundation，makes the pile incline to form unstable soil arch and causes engineering safety hazards or accidents.

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foundation engineering PHC pile soft soil foundation high embankment evolution of the soil arch field test

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	Articles by authors
	LI Jun1
	LI Guowei2
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	XIONG Li2
	HOU Yuzhou2
	WU Jiantao3

Cite this article:

LI Jun1,LI Guowei2,3, et al. Field study on soil arching evolution of high embankments on soft ground reinforced with PHC piles[J]. , 2022, 41(1): 186-194.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0034 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/I1/186

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