岩土工程学报2018，Vol.40Issue(1)：116-121,6.DOI:10.11779/CJGE201801011
黄土(Q3)横观各向同性强度准则研究
Strength criterion of cross-anisotropic Q3loess
摘要
Abstract
The structure of loess consisting of vertically extended cracks and horizontally deposited planes makes the cross-anisotropic strength behavior. In view of this, by using consolidated drained true triaxial tests, three principal stresses are alternatively loaded along the vertical direction. According to the geometric symmetry relation of the vertical principal stress axis in the stress state in the eight planes, the strength variation laws of the meridional plane in the three spatial domains with vertical and arbitrary horizontal forces and the variation laws of cohesion and internal friction angle with the ratio of the principal stress are analyzed, and the failure surface of the loom with transversely isotropic structure on the octahedral plane is obtained. Under the condition that the two principal stress axes are orthogonal to the vertical principal stress axis without orthogonal rotation, based on the theory of the principal stress space rotation proposed by Lade, the existing isotropic strength expression is improved and developed, and a new strength criterion for the rotation of principal stress axis in cross-anisotropic loess is proposed. The essential effectiveness of the new criterion is confirmed by the results of experimental facts.关键词
横观各向同性/真三轴试验/强度准则/黄土Key words
cross-anisotropy/true traxial test/strength criterion/loess分类
建筑与水利引用本文复制引用
许萍,邵生俊,张帅..黄土(Q3)横观各向同性强度准则研究[J].岩土工程学报,2018,40(1):116-121,6.基金项目
国家自然科学基金项目(11572245) （11572245）
陕西省教育厅重点实验室科研计划项目(17JS092) （17JS092）
西安理工大学校科技创新计划项目(2016CX021) （2016CX021）
校博士启动金项目(104-2560816023) （104-2560816023）
水电学院开放基金项目(2016ZZKT-31) （2016ZZKT-31）
