土工基础

›› 2019, Vol. 33 ›› Issue (2): 220-224.

• 工程实录 • 上一篇    下一篇

最优含水率与粗粒含量关系探究

熊毅   

  1.  (中铁工程设计咨询集团有限公司，北京 100055)
  • 收稿日期:2018-06-07 修回日期:2018-07-02 出版日期:2019-04-20 发布日期:2019-04-22
  • 作者简介:熊 毅（1990-）,男，助理工程师，硕士，研究方向为城市轨道交通设计。
  • 基金资助:

    国家自然科学基金（51308209）；湖南省自然科学基金（2015jj6038）

Relationship between Optimal Moisture Content and Coarse Grain Content in Granular Soils

XIONG Yi   

  1. （China Railway Engineering Consulting Group Co. Ltd., Beijing 100055）
  • Received:2018-06-07 Revised:2018-07-02 Online:2019-04-20 Published:2019-04-22

摘要： 针对粗粒土特点，对其室内击实试验原理做了简单论述。同时就当前的研究热点，详细分析了影响粗粒土击实特性的内外部因素，包括颗粒级配与材料性质，制样方式与击实方法等。并根据五位研究者的试验数据，详细分析了粗颗粒的加入对土样的击实效应作用规律。在总结前人的研究成果的基础上，分析得到以下结论：（1）粗颗粒的粒径大小不是影响粗粒土最优含水率的关键因素，而粗粒含量才是重要的影响指标。（2）粗粒土的最优含水率与粗粒含量之间存在较好的线性关系；不仅细颗粒与其含水率之间是线性关系，且粗颗粒与其含水率之间也呈线性关系变化。（3）对线性关系进行了指标化处理，给出了粗粒土最优含水率与粗粒含量之间的定量关系，为后续提出普适性公式打好基础。

关键词: 粗粒土, 击实性能, 最优含水率, 骨架效应, 线性拟合

Abstract:  This paper briefly introduces the Proctor Test principles on granular soils. Factors that are potentially affecting the laboratory compaction test results, such as, gradation, material properties, sample preparation methods and methods of compaction, are evaluated in detail. The effect of coarse gain soil content in the granular soil samples on the Proctor Test results are summarized from test results from five different sources. Combined from the rest results as well as the literature review, the following conclusions can be made: 1) The critical factor that affecting the optimum moisture content is not the size of the coarse grains but the content of the coarse grain soils; 2) linear relationships are existed between the optimum moisture content and coarse grain coarse, the optimum moisture content and fine grain content; 3) the linear relationships are formulized.  
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Key words: coarse grained soils, compactive effort, optimum moisture content, matrix effect, linear regression