桩承式挡墙路堤三维土压力分布与变形特性试验

doi:10.13722/j.cnki.jrme.2020.0587

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Abstract To investigate the three-dimensional earth pressure distribution and deformation characteristics of piled embankments with retaining wall，ten groups of model tests considering the embankment height，the clear distance between piles as well as even and uneven settlements of soil between piles were carried out using a multiple trapdoor test setup. The displacement of sand fill was measured adopting particle image velocimetry technique (PIV)，and the soil pressures between the piles，on the pile top and on the retaining wall were monitored by self-made load gauges and earth pressure cells. The test results show that the embankment has two deformation patterns including triangle expanding pattern and tower-shape development pattern. With increasing the embankment height，the minimum and residual values of the stress reduction ratio decrease，while the retrogression rate(stress recovering rate) of the soil arching effect and the settlement for the residual stage increase. The uneven settlement weakens the peak soil arching effect but has little influence on the residual value of the soil arching effect. The soil arching effect in the embankment fill induces the concentration of the earth pressures at the pile top and a certain height in the central part of the embankment. The soil arching effect in the triangular expanding pattern is weaker than that in the tower-shaped development pattern. The soil arching effect in the tower-shaped development pattern is strengthened and maintained at a high level during the settlement. This study on the evolution of three dimensional distribution of the earth pressure and deformation with the settlement between piles provides a basis for the design of pile supported retaining wall embankment.

Key words： soil mechanics piled embankments retaining wall soil arching effect deformation pattern model tests

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	RUI Rui1
	ZHAI Yuxin1
	2
	WANG Lei1
	XU Yangqing3

Cite this article:

RUI Rui1,ZHAI Yuxin1,2, et al. Experimental investigation of three-dimensional earth pressure distribution and deformation patterns of piled embankments with retaining wall#br#[J]. , 2021, 40(3): 590-606.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0587 OR http://rockmech.whrsm.ac.cn/EN/Y2021/V40/I3/590

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