岩土力学2017，Vol.38Issue(7)：2080-2086,2112,8.DOI:10.16285/j.rsm.2017.07.031
基于联合强度的黄土主动土压力公式与计算比较
Comparison of active earth pressure formulations of loess based on joint strength
摘要
Abstract
Earth pressure is one of the traditional research subjects in geotechnical engineering.With respect to the structural loess,shear strength and tensile strength are two aspects of structural loess strength characteristics.Therefore,the impact of tensile strength of loess on the earth pressure calculation needs to be evaluated reasonably.Based on the theory of joint strength considering tension and shear properties of loess simultaneously,a new formula of active earth pressure is derived to analyze equilibrium of active limit stress state.The formula is verified and compared with Rankine's active earth pressure.Result shows that the active earth pressure based on the joint strength theory is larger than Rankine's active earth pressure determined by traditional Mohr-Coulomb theory,and the tensile crack depth of soil behind wall is relatively small.Due to the overestimation of the tensile strength in Mohr-Coulomb strength theory,the value of Rankine's active earth pressure is underestimated.However,the theory of joint strength based on tensile strength of loess can reasonably calculate the active earth pressure.关键词
黄土/抗拉强度/联合强度公式/主动土压力Key words
loess/tensile strength/joint strength formula/active earth pressure分类
建筑与水利引用本文复制引用
骆晗,李荣建,刘军定,霍旭挺,张真,孙萍..基于联合强度的黄土主动土压力公式与计算比较[J].岩土力学,2017,38(7):2080-2086,2112,8.基金项目
国家自然科学基金项目(No.41472296,No.11072193) （No.41472296,No.11072193）
陕西省黄土力学与工程重点实验室项目(No.14JS064) （No.14JS064）
中国地质调查项目(No.12120114035901).This work was supported by the National Natural Science Foundation of China (41472296,11072193),the Key Laboratory of Loess Mechanics and Engineering of Shaanxi Province (14JS064) and China Geological Survey (12120114035901). （No.12120114035901）
