西安理工大学学报2017，Vol.33Issue(2)：199-203,5.DOI:10.19322/j.cnki.issn.1006-4710.2017.02.013
结构性黄土地基中挤密桩扩孔效应研究与评价
Effect of compaction pile's cavity expansion on structural loess subgrade
摘要
Abstract
The cavity expansion of compaction pile should be of an important impact on the structural weakening of loess,and may affect the interaction between pile and soil.Firstly,aimed at the compaction pile in the area of structural loess,the relationship between generalized shear strain and shear stress of soil around the pile under the condition of single pile cavity expansion is analyzed based on the theory of cavity expansion,with the stress and strain of structural loess under different stress levels obtained by the triaxial tests.The structural parameter of loess is introduced into the analyses of a single pile's cavity expansion,with the attenuation change of structural parameter of loess caused by cavity expansion effect studied.The research results show that the attenuation of structural parameter of the loess is more obvious in the cavity expansion when loess is closer to pile shaft and the structural parameter is equal to 1.0 when loess is adjacent to pile shaft;when the attenuation of structural parameter of the loess is smaller and when it was further from pile shaft,the structural parameter at infinity is close to the initial structural parameters of intact loess.关键词
单桩/扩孔效应/结构性黄土/结构性参数/衰减Key words
single pile/cavity expansion/structural loess/structural parameter/attenuation分类
建筑与水利引用本文复制引用
王治军,宋焱勋,骆建文,谈永光,孙萍,李荣建..结构性黄土地基中挤密桩扩孔效应研究与评价[J].西安理工大学学报,2017,33(2):199-203,5.基金项目
国家自然科学基金资助项目(41472296,11072193) （41472296,11072193）
西安长庆科技工程有限责任公司资助项目(CTEC(2014)Z-KY-013) （CTEC(2014）
陕西省黄土力学与工程重点实验室资助项目(14JS064) （14JS064）
