摘要
试验结果表明，添加纤维可以改善石灰土的力学性能。若添加单丝纤维和短的网状纤维，其最佳含量为0．4％，而掺长网状纤维，最佳含量应为0．2％～0．3％；纤维石灰土的强度较石灰土有显著的增加，随龄期的增长，强度的增加大于弹性模量的增加，模强比较小，说明纤维石灰土不仅具有较高的抗压强度，而且具有一定的抗拉能力。应力应变曲线特征，主要表现在破坏后阶段，纤维含量越多，应力下降越小，龄期越长，应力下降越大；纤维石灰土的破坏特征基本符合莫尔一库伦萌切规律．但是随纤维含量的增多．剪切带增宽。
Based on the experiment, the reinforced fiber can improved the mechanical capacity of lime soil. When the additive is mono-filar or short meshy fiber, the optimal content is 0.4%, while for long meshy fiber the optimal content is 0.2% - 0.3%. The strength of the reinforced fiber lime soil is much higher than that of lime soil. With the going up of the age, the increase of the strength is larger than the increase of elastic modulus, and the ratio of modulus and strength is lower, which indicates that the reinforced fiber lime soil is not only with higher compression strength, but also with the tensile ability. According to the stress-strain curve, it can be found that at the phase of post-damage the more content of fiber makes less stress decrease, while the longer age makes the more stress descending. The damage characteristic of the fiber lime soil approximately accords with the Mohrcolumn shear rule, and the shearing band will gradually be wider with the more content of fiber.
出处
《工程勘察》
CSCD
北大核心
2007年第6期1-5,共5页
Geotechnical Investigation & Surveying
基金
国家自然科学基金(40172089)
关键词
加筋纤维
石灰土
试验
reinforced fiber
lime soil
experiment
作者简介
张小平（1965-），女（汉族），山西平陆人，博士．副教授．
