期刊论文

中文

中国科技论文

2095-2783

2017

12

6

660-665

10.3969/j.issn.2095-2783.2017.06.012

(CX2015B308):湖南省研究生科研创新资助项目 (CX2015B31):中南林业科技大学研究生科技创新基金资助项目

本校为第一机构

采用室内三轴试验,研究了生物酶、石灰、水泥改良膨胀土的应力-应变曲线及强度特性,探讨了生物酶、石灰、水泥含量对改良膨胀土强度影响的变化规律.试验结果表明:1)改良膨胀土的偏应力随轴向应变的增加而增加,掺生物酶改性膨胀土的试验曲线表现为硬化型,掺石灰、水泥改性膨胀土试验曲线表现为软化型;2)掺生物酶、石灰、水泥能提高膨胀土体承受偏应力的强度,相同围压下,掺1∶300(酶与水的质量比)生物酶试样承受的偏应力最大,掺7%的石灰次之,最后为掺9%的水泥;3)通过比较分析强度提高系数R可知,掺1∶300(酶与水的质量比)生物酶对提高膨胀土抗剪强度效果最佳.以上研究结果为娄益高速处置膨胀土路基...

Laboratory triaxial tests were carried out in order to understand the stress-strain relationship and strength property of bio-enzyme-treated, lime-treated and cement-treated expansive soil.The effect change of biological enzyme, lime and cement content on the strength of expansive soil was studied.The laboratory test results show as follows: 1) With the increase in axial strain, the deviator stress increases, and the bio-enzyme-treated expansive soil relation curves of deviator stress and axial strain present as hardening type.The lime-treated ...