摘要
为探究生物酶改良膨胀土压缩特性,通过一维固结试验,研究了生物酶、石灰、水泥改良膨胀土体孔隙比、压缩系数、单位沉降量与荷载变化规律.探讨了固结压力对生物酶、石灰、水泥改良膨胀土体压缩特性的影响.试验结果表明:生物酶、石灰、水泥改良膨胀土表现出不同的压缩性,主要反映在压缩曲线与压缩系数上;掺生物酶、石灰、水泥都能改善膨胀土的压缩性,其中,生物酶配比为1:300改良膨胀土的压缩性最小;改良膨胀土的单位沉降量与荷载的关系可用幂函数来表示:si=bpai.
Abstract
In order to determine the compressibility characteristics of bio-enzyme expansive soil,by a series of one-dimensional consolidation tests,the effect of consolidation pressure on compressibility attributions of bio-enzyme-treated,lime-treated and cement-treated expansive soil is scrtutinized,and voids ratio, compression coefficient and unit settlement are gained.The influence of compression pressure on bio-enzyme-treated expansive soil,lime-treated expansive soil,and cement-treated expansive soil is discussed. Bio-enzyme-treated,lime-treated and cement-treated expansive soil possesses different compressibility, which is embodied by e-p curve and coefficient compressibility The compressibility of expansive soil is improved by adding bio-enzyme,lime and cement.When the mass ratio between enzyme and water is 1:300,compressibility is minimum.Linear equations can describe the relation between unit settlement and unit loads:si=bpai.
基金项目
湖南省科技厅项目(19801-8025)
湖南省研究生科研创新资助项目(CX2015B308)
中南林业科技大学研究生科技创新基金(CX2015B31)
NETL
NSTL
维普
万方数据