有机质相压缩变形对泥炭土固结特性影响

方坤斌; 李卫超; 杨敏

doi:10.11779/CJGE2017S2047

有机质相压缩变形对泥炭土固结特性影响 English Version

方坤斌^{1, 2},
李卫超^1,2, ,,
杨敏^{1, 2}

1. 同济大学地下建筑与工程系,上海 200092;
2. 同济大学岩土及地下工程教育部重点实验室,上海 200092

基金项目: 国家自然科学基金项目（41572258）

详细信息

作者简介:
方坤斌(1992- ),男,硕士研究生,主要从事有机质软土工程特性的科研。E-mail: fang.kunbin@outlook.com。

通讯作者:
李卫超，E-mail：WeichaoLi@tongji.edu.cn

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出版历程
- 收稿日期: 2017-08-01
- 发布日期: 2017-12-19

Effect of compression of organic matter on consolidation behavior of peaty soil

FANG Kun-bin^{1, 2},
LI Wei-chao^1,2, ,,
YANG Min^{1, 2}

1. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China;
2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China

摘要

摘要: 含有机质组分是泥炭土区别于矿质软土的重要特征,有机质含量直接影响了泥炭土的物理性质,进而影响了泥炭土的固结特性。基于国内外学者的研究,统计了大量泥炭土物理性质指标,分析了有机质含量与密度、含水率、土粒比重线性相关关系,并结合特殊土粒比重和平均土粒比重概念推导泥炭土特殊四相模型中液相孔隙比、有机质“孔隙比”表达式。在此基础上,考虑有机质相可压缩变形对泥炭土固结特性的影响,将有机质压缩变形模型与Terzaghi一维固结理论耦合,通过模型计算结果与室内试验数据进行对比分析,进一步验证了该模型的可行性。
- 泥炭土 /
- 有机质 /
- 特殊比重 /
- 四相模型 /
- 固结特性
Abstract: The organic matter is an important symbol of peaty soil which is different from soft clay. The content of organic matter directly affects the physiochemical properties of peaty soil, and further affects its consolidation characteristics. Based on the researches of domestic and foreign scholars, the linear correlations between the content of organic matter with density, water content and specific gravity are analyzed. The void ratio of water and organic matter in the special four-phase model for peaty soil is deduced by combining the specific gravity of the inorganic solid phase with the mean specific gravity of the solid phase. Furthermore, by considering the effect of compression of organic matter on the consolidation characteristics of peaty soil, the compressive deformation model for organic matter is coupled with Terzaghi's one-dimensional consolidation theory, and the feasibility of the model is verified by comparing the calculated results with the experimental data.
- peaty soil /
- organic matter /
- special gravity of solid phase /
- four-phase model /
- consolidation behavior

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参考文献(21)

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