塑料排水板联合真空预压的径向固结理论研究

doi:10.13722/j.cnki.jrme.2018.0846

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Abstract Based on the equivalent assumption of elliptic cylindrical drain and the linear loss law of the vacuum degree in the prefabricated vertical drain(PVD)，a solution for calculating the radial consolidation of PVD combined with vacuum preloading was proposed. The shape effect of PVD was discussed and the influence of relevant parameters on the foundation consolidation was analyzed. Case study was performed to validate the rationality of the present solution by the comparison between the settlement curve calculated by the present solution and the measured settlement curve，and the consolidation behavior is detailed investigated on the basis of the present solutions. The results show that，when considering the shape effect of PVD，the elliptic cylinder equivalent method is the optimum choice and the result calculated by the perimeter equivalent method is closer to that by the elliptic cylinder equivalent method. Increasing the loss coefficient of the vacuum degree or the vacuum pressure on the top of PVD can accelerate the discharge of pore water in the foundations，speed up the descent rate of the water table and lower the final water table. As the parameter κ increases，the consolidation rate of the overall foundation slows down.

Key words： foundations prefabricated vertical drain elliptical cylindrical drain vacuum preloading shape effect loss coefficient of vacuum degree

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	Articles by authors
	TIAN Yi1
	2
	WU Wenbing1
	2
	3
	4
	MEI Guoxiong1
	2
	3
	4
	JIANG Guosheng1
	2
	ZONG Mengfan1
	2

Cite this article:

TIAN Yi1,2,WU Wenbing1, et al. Radial consolidation theory for prefabricated vertical drain combined with vacuum preloading#br#[J]. , 2019, 38(10): 2151-2160.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2018.0846 OR https://rockmech.whrsm.ac.cn/EN/Y2019/V38/I10/2151

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