摘要
用室内三轴试验方法研究了原状和重塑草根加筋土的强度特性,分析含根量对土体强度的影响,并对二者强度的差异进行量化描述。试验结果表明：对于原状草根加筋土,含根量的增加对内摩擦角基本无影响,但可提高土体黏聚力,并且黏聚力先增加再基本保持不变;对于重塑草根加筋土,存在最优含根量使其强度最高,并且该值与围压相关,随围压的增大,该值增加;重塑草根加筋土的含根量是原状土的4~6倍时,二者土体破坏时的主应力差值基本相等。
Laboratory triaxial tests are carried out in order to understand the strength property of undisturbed and remolded grassroots-reinforced soil （UGRS and RGRS）. The influence of root content on soil strength is investigated. Moreover, the strength difference between the two soils is quantitatively described by root content. The laboratory test results show that： （1） As to UGRS, the increase of root content has little effect on the internal friction angle, while it can improve the cohesion which increases first and then keeps unchanged; （2） There is an optimal root content in RGRS making soil strength the highest, which increases with the increasing confining pressure; （3） When the＇root content in RGRS is 4~6 times that in UGRS, the deviator stresses of RGRS find UGRS in the limit equilibrium state are almost equal.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2015年第8期1405-1410,共6页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金项目(51279128)
国家自然科学基金创新研究群体科学基金项目(51321065)
交通运输部交通建设科技项目(2013328224070)
关键词
原状土
重塑土
草根加筋土
含根量
三轴试验
强度
undisturbed soil
remolded soil
grassroots-reinforced soil
root content
triaxial test
strength
