工程地质学报2017，Vol.25Issue(1)：102-109,8.DOI:10.13544/j.cnki.jeg.2017.01.014
不同含水率条件下EPS颗粒轻量土蠕变特性试验研究
EXPERIMENTAL ON CREEP PROPERTIES OF EPS BEADS LIGHT WEIGHT SOIL UNDER DIFFERENT WATER CONTENTS
摘要
Abstract
In order to gain the creep laws of light weight soil which is in the central part of the subgrade under long-term loading,the creep properties of light weight soil and remolded soil with different water contents and axial compression force were analyzed by one-dimensional compression tests.The results show that when other factors are the same,the higher the axial compression force and water content are,the greater the creep deformation of soil samples is.The deformation of light weight soil under loading for one day can basically reach 93％～98％of the whole deformation,and the attenuating creep is obvious.Light weight soil is a kind of structural soil,and it has different creep mechanism with remolded soil.When the axial compression force is no more than the compressed yield stress,the creep deformation is mainly from holes closure,drainage water,solid particles' movement.When the axial compression force is more than the compressed yield stress,the original structure of the light weight soil will be destroyed and EPS beads will be compressed.Based on the attenuation creep characteristics of light weight soil,an empirical creep model is established base on the hyperbolic model.When the axial compression force is less than the compressed yield stress,it can basically reflect the creep laws of light weight soil which is in the central part of the subgrade.By the experiments and theoretical calculation analysis,it is found that the consolidation characteristic of light weight soil is better than that of remolded soil.So the subgrade settlement can reach a stable value after the construction,and the post-construction settlement can almost be neglected during the operation.关键词
轻量土/含水率/蠕变特性/蠕变试验/蠕变模型Key words
Light weight soil/Water content/Creep properties/Creep experiments/Creep model分类
建筑与水利引用本文复制引用
刘德方,侯天顺,Sibel Pamukcu..不同含水率条件下EPS颗粒轻量土蠕变特性试验研究[J].工程地质学报,2017,25(1):102-109,8.基金项目
国家自然科学基金项目(51509211),西北农林科技大学博士点基金项目(2011BSJJ084),陕西省自然科学基金项目(2012JQ7013),中央高校基本科研业务费专项资金项目(QN2012025),陕西省专项配套经费项目(Z109021108),陕西省社会发展科技攻关项目(2015SF260),国家留学基金项目(201406305047),西北农林科技大学大学生创新训练项目(201410712093)资助. （51509211）
