初始含水率对吹填土压缩和强度特性影响的试验研究

doi:10.13722/j.cnki.jrme.2018.1198

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摘要吹填土属于未经初始固结、无初始结构的特殊重塑土，其加固前的初始含水率将对加固后土体的压缩沉降和强度产生影响。为了研究初始含水率对吹填土加固过程及结果的影响，开展不同初始含水率吹填土样的正压和真空加载三轴试验研究，并结合前人的试验结果对初始含水率与土样的修正剑桥模型压缩指标?与强度指标M的关系进行讨论。研究表明，不同于天然沉积的结构性土，吹填土的压缩过程线大致可分为初始结构形成阶段和规律性压缩阶段。随着土样初始含水率的增大，?值大致呈对数关系增长，M值大致呈对数关系减小。最后，结合研究结果提出吹填土?值和M值的经验值范围，可为工程应用与后续研究提供一定的参考。

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	林澍1
	2
	闫澍旺1
	2
	闫玥1
	2
	邱长林1
	2
	庄道坤1
	2
	邢晓佳1
	2

关键词 ：土力学, 吹填土, 初始含水率, 压缩固结, 三轴试验

Abstract：Slurry is a special remoulded soil without preconsolidation and in an unstructured state，and the initial water content before consolidation will affect the compression settlement and the strength of the slurry. To investigate the effects of the initial water content on the process and results of slurry consolidation，positive- loading GDS and vacuum-loading triaxial tests were performed on slurry samples with different initial water contents，and the relationships between the initial water content and soil factors ? and M in modified Cambridge clay model were also investigated based on the test results of previous works and this study. The research results show that the compression procedure of the slurry can be roughly divided into two stages including the initial structure formation stage and the regular compression stage，which differs from the natural deposited soil. With increasing the initial water content，? increases logarithmically while M decreases logarithmically. The empirical values of ? and M of the slurry were proposed in accordance with the research results to give a reference to the practical engineering and the following researches.

Key words： soil mechanics slurry initial water content compression consolidation triaxial test

引用本文:

林澍1，2，闫澍旺1，2，闫玥1，2，邱长林1，2，庄道坤1，2，邢晓佳1，2. 初始含水率对吹填土压缩和强度特性影响的试验研究[J]. 岩石力学与工程学报, 2019, 38(7): 1452-1460.
LIN Shu1，2，YAN Shuwang1，2，YAN Yue1，2，QIU Changlin1，2，ZHUANG Daokun1，2，XING Xiaojia1，2. Experimental research of the influence of the initial water content on the compression and strength properties of slurry. , 2019, 38(7): 1452-1460.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2018.1198 或 http://www.rockmech.org/CN/Y2019/V38/I7/1452

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