| 考虑有效应力的软土固结系数变化规律 |
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| 引用本文： | 张明,赵月平,王威,赵有明,马东辉,苏经宇.考虑有效应力的软土固结系数变化规律[J].北京工业大学学报,2010,36(2). |
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| 作者姓名： | 张明 赵月平 王威 赵有明 马东辉 苏经宇 |
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| 作者单位： | 中国铁道科学研究院深圳研究设计院;河南省新开元路桥工程咨询有限公司;北京工业大学抗震减灾研究所; |
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| 基金项目： | 国家十一五科技支撑计划资助项目(2006BAJ06B01,2006BAJ04A03,2006BAJ13B04,2006BAJ16B03) |
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| 摘 要： | 在渗透系数与孔隙比以及有效应力和孔隙比的2类经验回归拟合关系的基础上,推导出固结系数和有效应力的表达式,通过算例和室内试验研究了不同固结应力软土压缩过程中固结系数的变化规律,同时提出考虑有效应力的软土固结系数三次多项式拟合回归方程.研究结果表明:随着有效应力的增加,考虑固结系数变化的软土地基固结速率,相对于太沙基固结理论预测的固结速率,会在一定程度上加快(压缩指数Cc与渗透指数Ck的比值Cc/Ck1)或减缓(Cc/Ck1)土体的固结,Cc/Ck=1时,与太沙基固结理论假设一致;采用统一的三次多项式拟合固结系数与有效应力的关系,达到了很好的拟合效果,此结果为数值分析中参数选取的准确性提供了保障,能较准确预估软土地基的变形速率.
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| 关 键 词： | 固结系数 有效应力 渗透系数 孔隙比 多项式拟合 |
Variation Characteristics of Coefficient of Consolidation for Soft Soil Considering Effective Stress |
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| ZHANG Ming,ZHAO Yue-ping,WANG Wei,ZHAO You-ming,MA Dong-hui,SU Jing-yu.Variation Characteristics of Coefficient of Consolidation for Soft Soil Considering Effective Stress[J].Journal of Beijing Polytechnic University,2010,36(2). |
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| Authors: | ZHANG Ming ZHAO Yue-ping WANG Wei ZHAO You-ming MA Dong-hui SU Jing-yu |
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| Affiliation: | 1.Shenzhen Research and Design Institute;China Academy of Railway Sciences;Shenzhen 518034;China;2.Henan Provincial Newcentry Highway and Bridge Consultation Ltd;Zhengzhou 450016;3.Institute of Earthquake Resistance and Disaster Reduction;Beijing University of Technology;Beijing 100124;China |
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| Abstract: | Based on two kinds of experimental regression and fitting relationship between coefficient of permeability and void ratio as well as the relationship between effective stress and void ratio of soil,an expression between coefficient of consolidation and effective stress is derived.A series of calculation examples and laboratory test are conducted to study the variety law of coefficient of consolidation of soft soil with different consolidation stress under compression,and proposes the cubic polynomial regres... |
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| Keywords: | coefficient of consolidation effective stress coefficient of permeability void ratio polynomial fitting |
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