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卸荷下老黏土的静力特性试验研究
收稿日期: 2012-12-08
修回日期: 2013-01-28
网络出版日期: 2013-03-23
Static and Dynamic Response of Old Clay under Unloading
Received date: 2012-12-08
Revised date: 2013-01-28
Online published: 2013-03-23
为了研究老黏土在卸荷条件下的强度和变形特性，利用应力路径三轴仪对武汉地区具有代表性的老黏土进行固结不排水三轴试验。通过与软黏土的已有研究成果进行对比，探讨了卸荷条件下老黏土主要破坏的型式和应力-应变归一化特性。基于Duncan-Chang模型，验证了适合武汉老黏土的非线性弹性模型，总结出老黏土的变形发展规律，并给出了Duncan-Chang本构模型参数建议值。
关键词： 老黏土; 卸荷; 应力应变归一化; Duncan-Chang 模型
陈聪 , 郑新定 , 刘召刚 , 简琦薇 , 周健 , 陶文涛 , 侯云亮 . 卸荷下老黏土的静力特性试验研究[J]. 隧道建设, 2013 , 33(3) : 209 -214 . DOI: 10.3973/j.issn.1672-741X.2013.03.007
This article focuses on strainstress behavior of old clay in Wuhan along with different unloading ratio based on triaxial tests, compared with researches on soft clay. With utilizing DuncanChang constitutive model, a favorable consideration of Wuhan old clay may be given in nonliner and nonelastic model and constitutive parameters, which would be validated by many experiments, and may be useful for conducting practical projects in terms of the acquisition of constitutive parameters and models.
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