期刊论文

K-G Model of Bioenzyme-treated Expansive Soil Based on Disturbed State Theory

Wen, Chang-Ping(wenchangping@163.com)

中文

中国公路学报

1001-7372

2018

31

2

308-318

10.19721/j.cnki.1001-7372.2018.02.033

(HELFMTS1707):现代木结构工程材制造及应用技术湖南省工程实验室开放基金项目 (2013ZDXK006):湖南省重点学科建设项目

本校为第一且通讯机构

以生物酶改良膨胀土的非线性弹性本构关系为研究对象,提出基于扰动状态理论的修正KG模型。首先开展不同生物酶掺量条件下的重塑膨胀土样的等向固结排水试验和等p三轴固结排水剪切试验,研究生物酶改良膨胀土的应力-应变关系特征,基于非线性弹性K-G模型,分析生物酶掺量对膨胀土的切线体积模量Kt和切线剪切模量G_t中相关参数的影响规律。采用生物酶掺量作为扰动掺量,以试验和扰动状态概念为基础建立扰动函数,基于扰动状态理论对K-G模型进行修正,以反映生物酶掺量对改良膨胀土应力-应变扰动关系,使本构关系符合土体的实际变形过程,更合理地描述生物酶改良膨胀土的非线性弹性应力-应变关系。结果表明...

A modified K-G model based on disturbed state theory (DST) was proposed to investigate the nonlinear elastic constitutive relation of bioenzyme-treated expansive soil. The isotropic consolidation drainage tests and triaxial consolidated drained shear tests with constant p of remolded expansive soil samples under different ratios of bioenzyme were conducted, and the stress-strain relationship of bioenzyme-treated expansive soil was investigated. The influence mechanism of the ratio of bioenzyme on the tangent bulk modulus Kt and tangent shear mo...