《Journal of Geotechnical and Geoenvironmental Engineering》杂志刊登“过渡性粉质粘土的应力-应变及强度特性”

作者：Pongpipat Anantanasakul; Jerry A. Yamamuro; Victor N. Kaliakin

刊物：《Journal of Geotechnical and Geoenvironmental Engineering》，2012年10月，138卷第10期，1257-1265页

关键词：粘土；粉粒成分；各向异性；应力应变特性

摘要：本文研究了各向异性的过渡性粉质粘土中非塑性粉质成分对应力-应变、体变及强度特性的影响。对三种横观各向异性的试样进行了一系列的单向压缩试验、各向同性压缩试验以及不排水和排水的三轴试验，试样分别由相似的粘土、不同的粉砂质成分构成的泥浆固结而成。试验主要加载方向有两种，一种与试样沉积轴平行，一种与试样沉积轴垂直。结果表明，在单向压缩实验和各向同性压缩试验中，随着粉质成分的增加，粉质粘土的压缩性降低；在排水和不排水三轴试验中，对于相同固结应力下正常固结的土，随着粉质成分的增加，土的刚度值及排水抗剪强度和不排水抗剪强度有所增加。对于不排水三轴试验，随着粉质成分的增加会出现较大的孔压变化，但对于排水三轴试验，则体应变比较大。另外，结果还表明粉质成分会对过渡性粉质粘土的应力-应变和强度特性产生较大的影响。

Stress-Strain and Strength Characteristics of Silt-Clay Transition Soils

Authors: Pongpipat Anantanasakul; Jerry A. Yamamuro; Victor N. Kaliakin

Journal: Journal of Geotechnical and Geoenvironmental Engineering, Volume 138, Issue 10 (October 2012), 1257–1265

Key words: Clay, Silt content, Anisotropy, Stress-strain behavior

Abstract: The influence of nonplastic silt content on the stress-strain, volume change, and strength characteristics of anisotropic silt-clay transition soils is investigated. A series of one-dimensional compression tests, isotropic compression tests, and undrained and drained triaxial tests on three soils of similar base clay but different nonplastic silt contents are performed on cross-anisotropic specimens prepared from consolidation of slurries. Tests with major loading directions both parallel and perpendicular to the specimens’ axis of deposition are performed. It is observed that the tested silt-clay soils are less compressible with increasing silt content during one-dimensional and isotropic compression tests. During drained and undrained triaxial tests, the normally consolidated soils at the same consolidation stress show larger values of stiffness and drained and undrained shear strengths with increasing silt content. The silt-clay soils also show larger pore pressure changes during undrained triaxial tests but essentially similar volumetric strains during drained tests as the silt content increases. In addition, it is observed that silt content significantly influences the anisotropy of the stress-strain and strength characteristics of the transition silt-clay soils.

原文链接：http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000692

翻译：孙庆雷；审核：邓刚