石灰改良黏性土CBR值的试验研究

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摘要承载比（ CBR 值）是用来评定路基和路面材料承载力的重要指标。一般情况下，黏性土的 CBR 值无法满足设计施工的需要，石灰作为一种有效的外掺剂可以显著改善其物理力学性能，提高其强度。为了研究不同石灰掺量对土体 CBR 值的影响 , 结合江苏省某高速公路的建设，对素土及不同掺灰量的改良土进行了一系列物理力学试验。在此基础上，分析了石灰掺量对土体物理力学性质的影响，探讨了改良土 CBR 值的变化规律和主要影响因素。

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	曹培
	王芳
	严丽雪
	顾春媛

关键词 ：承载比, 石灰, 黏性土, 掺灰量, 干密度

Abstract：The California bearing ratio (CBR) is an important index to evaluate the performances of the subgrade and pavement materials in expressways. Generally, the CBR<> value of clay is not enough for design and construction. Lime is an effective and commonly used admixture that can remarkably improve the physical and mechanical properties and strength of the clay. In order to study the influence of lime content on the CBR value, series of physical and mechanical tests on the clay from an expressway in Jiangsu are carried out. Based on the tests results, the influences of the lime content on the physical and mechanical properties of the clay are analyzed. The variaton rules of the CBR value and the main influence factors are also discussed.

Key words： CBR lime clay lime content dry density

收稿日期: 2011-04-27

TU411

作者简介: 曹培 (1981 – ) ，女，江苏徐州人，工程师，从事土的基本理论与土工试验研究。

引用本文:

曹培, 王芳, 严丽雪, 顾春媛. 石灰改良黏性土CBR值的试验研究[J]. 岩土工程学报, 2011, 33(zk1): 298-301. CAO Pei, WANG Fang, YAN Li-xue, GU Chun-yuan. Experimental study on CBR value of improved clay with lime. Chinese J. Geot. Eng., 2011, 33(zk1): 298-301.

链接本文:

http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/ 或 http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/Y2011/V33/Izk1/298

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