多因素耦合条件下重塑黄土的强度恢复特性研究  

Study on the Characteristics of Remolded Loess Strength Recovery under Multi Factors Coupling Conditions

作　　者：周伟红[1] 崔自治[1] 

机构地区：[1]宁夏大学土木与水利工程学院,银川750021

出　　处：《科学技术与工程》2015年第18期206-210,共5页Science Technology and Engineering

基　　金：教育部"长江学者和创新团队发展计划"创新团队项目(IRT1067)资助

摘　　要：为了探索重塑黄土的强度与时间的关系规律,以重塑黄土的含水量、干密度和龄期为因素,设计混合均匀试验方案,进行了多因素耦合条件下重塑黄土的强度恢复试验研究。应用最小二乘拟合建立了重塑黄土无侧限抗压强度与含水量、干密度、龄期的非线性回归数学模型。据此模型对宁夏下马关重塑黄土的强度恢复进行了预测,阐述了作用规律,分析了重塑黄土强度的触变恢复机理,得出了各单因素影响重塑黄土强度的重要性顺序,二因素交互作用影响的主次顺序,以及重塑黄土强度测定的合理时间节点,为宁夏处理后的黄土地基设计、施工提供理论和技术支撑。In order to explore the relationship between strength of remolded loess and time, taking the moisture content, dry density and age as factors, the mixed uniform scheme was designed to study the strength recovery of remolded loess under multi factors coupling conditions by experiment, the least square method was used to establish the nonlinear regression mathematical model between unconfined compressive strength, moisture content, dry density and age. This model was applied to predict the strength recovery of remolded loess in Ningxia Xia Ma Guan, expound the role of law, more in-depth analyze the thixotropic recovery mechanism of remolded loess strength, work out the importance sequence of the single factor that influencing strength of remolded loess, the sequence of two factors interaction, as well as the reasonable time node that measuring the strength of remolded loess. The research results provide theoretical and technical support for design and construction of Ningxia loess foundation after treatment.

关 键 词：重塑黄土 触变性 耦合效应 

分 类 号：TU432[建筑科学—岩土工程]