摘要
花岗岩残积土在我国华南地区分布极为广泛,通常处于非饱和状态,但国内外学者对非饱和花岗岩残积土的力学特性研究却较为有限。采用非饱和花岗岩残积土的不排水直剪试验数据对三个非饱和土强度预测公式进行了验证。结果表明Oberg公式所预测的强度与实测强度吻合度最高,同时该公式仅需提供土样破坏时的饱和度即可对强度进行预测,参数获取简单且便于工程推广。
The granitic residual soils are widely distributed in southern China and these soils are generally unsaturated in nature.However,the mechanical properties of the unsaturated granitic residual soils are rarely reported.This paper presents the undrained directed shear test result of the unsaturated granitic residual soils.The tested shear strength values were compared with three different formulas for the shear strength estimations.The comparative results indicate that the Oberg formula had the best estimation results.Further,this formula can predict the shear strength by only providing the degree of saturation at failure,therefore,it can be easily applied in the practical engineering projects.
作者
陈枝东
张领帅
陈敏华
陆钊
陈晓亮
陈锐
CHEN Zhidong;ZHANG Lingshuai;CHEN Minhua;LU Zhao;CHEN Xiaoliang;CHEN Rui(Shenzhen Hongyeji Geotechnical Science and Technology Co.,Ltd.,Shenzhen 518000;Department of Civil and Environmental Engineering,University of Macao,Macao 999078;College of Civil and Environmental Engineering,Harbin Institute of Technology,Shenzhen 518000)
出处
《土工基础》
2019年第2期210-214,共5页
Soil Engineering and Foundation
基金
深圳市科技研发资金(项目编号JSGG20170413163030692)
深圳市科技研发资金(项目编号20180504170449754)
关键词
花岗岩残积土
非饱和
直剪试验
抗剪强度
granitic residual soils
unsaturated soils
direct shear tests
shear strength
