增压式真空预压两种固结解析解的对比分析

doi:10.13722/j.cnki.jrme.2018.0455

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摘要增压式真空预压能够克服常规预压淤堵问题，但施加增压后的土体固结规律缺少理论依据，基于土体等应变理论，结合Newman-Carrilo方程，利用积分变换法，提出增压式真空预压单层均质土地基固结度解析解，并与分离变量法的固结结果进行对比分析，最后给出便于工程实践使用的图表。结果表明：随着时间因子Th的增大，固结度总体呈快速增长的趋势；随着井径比n增大，固结速率减缓；积分变换法与分离变量法求解得到的解析解相差甚小，认为两种方法均可以完成增压式真空预压固结解析解的推导。

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	沈宇鹏1
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	董淑海3
	王云超1
	金亚伟4
	李鑫宇1

关键词 ：土力学, 增压式真空预压, 积分变换法, 固结理论, 解析解

Abstract：Air-boosted vacuum preloading can overcome the problem of clogging of classical vertical drains，but there is lack of theoretical basis for the consolidation of air-boosted vacuum preloading method. The analytical solution of consolidation of single-layer homogeneous soil with air-boosted vacuum preloading is proposed which is based on the assumption of equal strain of soil，Newman-Carrilo equation and the intergral-transform method. And the results were compared the analytical solution with that from the separation variable method. At last，the engineering practical charts and tables are put forward to actual reference. The results show that：With the increase of Th，the total average consolidation degree grows rapidly. With the increase of n，the consolidation rate decreases；the analytical solution obtained by integral-transform method and separation variable method have little difference，which can be used to complete the derivation of the analytical solution of air-boosted vacuum preloading consolidation.

Key words： soil mechanics air-boosted vacuum preloading intergral-transform method consolidation theory theoretical solution

引用本文:

沈宇鹏1，2，董淑海3，王云超1，金亚伟4，李鑫宇1. 增压式真空预压两种固结解析解的对比分析[J]. 岩石力学与工程学报, 2019, 38(S1): 3171-3178.
SHEN Yupeng1，2，DONG Shuhai3，WANG Yunchao1，JIN Yawei4，LI Xinyu1. Comparative analysis between integral-transform solution and separate variable method for consolidation of the ground by air-boosted vacuum preloading. , 2019, 38(S1): 3171-3178.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2018.0455 或 http://rockmech.whrsm.ac.cn/CN/Y2019/V38/IS1/3171

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