生物酶改良膨胀土的压缩特性
Characteristics of compressibility of bio-enzyme expansive soil modified

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=bpia。
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=bpia.