连续级配土的级配方程及其适用性研究

朱俊高; 郭万里; 王元龙; 温彦锋

doi:10.11779/CJGE201510023

连续级配土的级配方程及其适用性研究 English Version

1. 河海大学岩土力学与堤坝工程教育部重点实验室，江苏南京 210098;
2. 河海大学岩土工程科学研究所，江苏南京 210098;
3. 中北大学土木工程系，山西太原 030051;
4. 中国水利水电科学研究院岩土工程研究所，北京 100038

基金项目: 国家重点基础研究发展计划（“973”计划）项目（2013CB036404）; 国家自然科学基金项目（51479052）; 中央高校基本科研业务费专项项目（2014B04914,2014B34214）

详细信息

作者简介:
朱俊高(1964- )，男，教授，博士生导师，主要从事土体基本性质及本构关系、土石坝工程研究。E-mail: zhujungao@hhu.edu.cn。

中图分类号: A
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出版历程
- 收稿日期: 2014-12-08
- 发布日期: 2015-10-19

Equation for soil gradation curve and its applicability

1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;
2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China;
3. Department of Civil Engineering, North University of China, Taiyuan 030051, China;
4. Department of Geotechnical Engineering, China Institute of Water Resources and Hydropower Research, Beijing 100038, China

摘要

摘要: 提出了一个描述连续级配土的级配方程，研究了方程的基本性质、对不同土体级配曲线的反映能力，验证了方程对各种连续级配土的普适性。研究表明：该级配方程能够描述出双曲线形、反S形和近乎直线等三种典型的土体级配曲线，而且对于黏土、粉土、砂土和粗粒土等不同土料的级配都具有广泛的适用性。方程参数分析得知b主要决定级配曲线的形状，即双曲线形或反S形，而且，当m较小时，曲线很缓，近似于直线。参数m主要决定曲线的倾斜程度，且曲线主体部分的斜率与m成正相关。和Swamee提出的级配方程相比，本文的级配方程有明显的优越性和更宽广的适用性。对6座国内外土石坝人工爆破堆石料的级配研究表明，级配参数b和m大致在-0.28~0.64和0.45~0.75范围。
- 土 /
- 级配曲线 /
- 级配方程 /
- 曲线拟合
Abstract: A new gradation equation which can be used to describe continuous gradation is put forward. Basic properties and reflection ability for different soils of the equation are studied, and general applicability of the equation is validated. The study shows that the equation can describe three typical soil gradation curves which are hyperbola, reversed S-shaped and approximate straight line shape, and has a wide applicability of clay, silt, sand and coarse-grained soil. The shape of gradation curve is determined by parameter b, namely hyperbola or reversed S-shaped, and when m is small, the curve is similar to a straight line. The slope of the curve is mainly determined by parameter m, and increases with the increase of m. The equation has more obvious advantages and broader applicability than Swamee's. Gradation curves of artificial blasting rockfill material from six earth-rock dams at home and abroad are studied, indicating that the range of parameters is roughly -0.28<b<0.64 and 0.45<m<0.75.
- soil /
- gradation curve /
- gradation equation /
- curve fitting

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参考文献(18)

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