工程地质学报2017，Vol.25Issue(3)：592-597,6.DOI:10.13544/j.cnki.jeg.2017.03.003
干湿循环下花岗岩残积土强度衰减试验研究
EXPERIMENTAL STUDY ON DETERIORATION OF GRANITIC RESIDUAL SOIL STRENGTH IN WETTING-DRYING CYCLES
摘要
Abstract
The safety and durability of the soil slope can be threatened when the strength of soil is deteriorated due to wetting-drying cycles.Experimental studies are undertaken on an undisturbed residual soil from southeast of Fujian area.It aims to discuss the variation of shear strength with the change of water contain and the cyclic number under wetting-drying cycles.It is shown that the cohesion of granite residual soil decreases in different degrees with increasing number of cycles and finally reaches to a constant state.However,the friction angle of granite residual soil keeps a stable with little influence of the wetting-drying effects.On the basis of the relationship between the amount of strength attenuation and cyclic number,the S-shaped function is adopted for fitting.The results show that the S-shaped function can well describe the attenuation rules of cohesion with the change of cyclic number.The results also have an important reference value for further reveal the influence of wetting-drying cycles on deterioration mechanism of granitic residual soil and long-term stability of residual soil slope in southeast of Fujian.关键词
花岗岩残积土/循环次数/强度衰减/函数拟合Key words
Granitic residual soil/Cyclic number/Strength attenuation/Function fitting分类
建筑与水利引用本文复制引用
简文彬,胡海瑞,罗阳华,唐炜业..干湿循环下花岗岩残积土强度衰减试验研究[J].工程地质学报,2017,25(3):592-597,6.基金项目
福建省自然科学基金(2015J01164),国土资源部丘陵山地地质灾害防治重点实验室开放基金(FJKLCP2012K001)资助. （2015J01164）
