| 天津地区软土的蠕变特性和速率敏感性 |
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| 引用本文： | 张斗斗,江志安,张锡治. 天津地区软土的蠕变特性和速率敏感性[J]. 天津大学学报(自然科学与工程技术版), 2009, 42(12): 1078-1082 |
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| 作者姓名： | 张斗斗 江志安 张锡治 |
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| 作者单位： | 张斗斗,张锡治(天津大学建筑设计研究院,天津,300072);江志安(铁道第三勘察设计院集团有限公司,大津,300151) |
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| 摘 要： | 为了研究软土次固结和速率敏感性的内在联系，基于过应力式弹黏塑性本构模型，推导出一个理论关系式，定量地建立了次固结系数和率敏感参数的关系．对天津某地典型软黏土进行了一系列次固结试验和变速固结不排水三轴压缩试验，分析了次固结系数和率敏感参数，验证了所推导的理论关系式的适用性．
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| 关 键 词： | 弹黏塑性 速率敏感性 次固结 软黏土 本构模型 |
Creep and Rate Sensitivity Behaviour of Tianjin Soft Clay |
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| Affiliation: | ZHANG Dou-dou, JIANG Zhi-an, ZHANG Xi-zhi (1. Academy of Architectural Design and Research, Tianjin University, Tianjin 300072, China; 2. The Third Railway Survey and Design Institute Group Corporation,Tianjin 300151 ,China) |
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| Abstract: | This paper is to study the inherent relationship between secondary consolidation and rate sensitivity of soft clay. Based on an overstress-type elasto-viscoplasticity constitutive model,a theoretical equation was deduced to quantify the correlation between secondary consolidation coefficient and rate sensitivity parameter. A series of laboratory tests on the soft clay of Tianjin were performed,including consolidated isotropic undrained（CIU）triaxial compression tests with changed strain-rates and long-term secondary consolidation tests. The corresponding parameters are analysed directly from laboratory tests. The laboratory results verifies the applicability of the deduced theoretical equation. |
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| Keywords: | elasto-viscoplasticity rate sensitivity secondary consolidation soficlay constitutive model |
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