腐殖土土-水特性及孔径分布特征研究
Study of Soil-Water and Pore Size Distribution Properties of the Humus
盛宴 1林焕生 1杜月林 2沈海林 1丁前绅3
作者信息
- 1. 深圳市天健坪山建设工程有限公司,广东 深圳 518118
- 2. 武汉市汉阳市政建设集团有限公司,湖北 武汉 430000
- 3. 辽宁工程技术大学力学与工程学院,辽宁 阜新 123000;中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北 武汉 430071
- 折叠
摘要
生活垃圾腐殖土的再生利用对垃圾填埋场可持续发展具有重要现实意义.以现场取回的腐殖土为研究对象,采用离心试验和核磁共振技术相结合的方法,开展了填埋龄期、初始干密度和最大粒径对腐殖土土-水特性和微观性质的影响规律研究;采用试验数据与VG模型相结合的方法,获得了腐殖土非饱和水力参数.初始干密度主要影响压实试样的饱和含水率和进气值,不同干密度的土-水特征曲线在大于 100 kPa范围内趋于重合.随着填埋龄和初始干密度增加,孔径呈减小趋势;而随着最大粒径的增加,孔径分布呈现相反的趋势.
Abstract
The humus of domestic waste was of great practical significance to the sustainable development of landfill.The effects of landfill age,initial dry density and the maximum particle size on soil-water and microscopic properties of humus were studied by centrifuge test and nuclear magnetic resonance.The unsaturated hydraulic parameters of humus were obtained by combining experimental data with VG model.The initial dry density mainly affects the saturated water content and air intake value of the compacted sample,and the soil-water characteristic curves with different dry densities tended to coincide within the range of more than 100 kPa.With the increase of landfill age and initial dry density,the pore diameter decreased.With the increase of the maximum particle size,the pore size distribution showed the opposite trend.
关键词
腐殖土/土-水特性/微观性质/非饱和水力参数/孔径Key words
humus/soil-water property/microscopic property/unsaturated hydraulic parameters/pore diameter引用本文复制引用
基金项目
湖北省自然科学基金杰出青年基金项目(2021CFA096)
出版年
2024
NETL
NSTL
维普
万方数据