多因素耦合条件下龄期对重塑黄土湿陷性的影响

发布时间：2018-04-24 20:44

本文选题：重塑黄土 + 湿陷性　；参考：《兰州理工大学学报》2015年06期

【摘要】：为探索黄土处理后取样测定湿陷性的合理时间节点,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,研究多因素耦合条件下龄期对重塑黄土湿陷性的作用规律.应用最小二乘拟合,建立湿陷系数与含水量、干密度、龄期的非线性回归数学模型.结果表明,影响湿陷系数的主要因素是干密度,其次是含水量和龄期;含水量和干密度的作用为负效应,龄期的作用为正效应.龄期干密度的交互作用为正效应,龄期含水量、含水量干密度的交互作用为负效应;交互作用的因素主次顺序为龄期干密度、龄期含水量、含水量干密度.取样测定湿陷性的合理时间节点与扰动黄土土样的干密度和含水量有关.试验所选水平范围内,龄期大于21d后,湿陷系数均基本趋于稳定,可取21d作为扰动黄土测定湿陷性的合理时间节点.
[Abstract]:In order to explore the reasonable time node for sampling and measuring collapsibility after loess treatment, a mixed uniform test scheme was designed based on the factors of water content, dry density and age of remolded loess. To study the effect of age on collapsibility of remolded loess under multi-factor coupling condition. By using least square fitting, a nonlinear regression mathematical model of collapsibility coefficient and moisture content, dry density and age was established. The results showed that the main factors affecting the coefficient of collapsibility were dry density, followed by water content and age, the effect of water content and dry density was negative and the effect of age was positive. The interaction of dry density of age is positive effect, the interaction of water content and dry density of water content is negative effect, and the order of interaction factors is dry density of age, water content of age and dry density of water content. The reasonable time node for sampling and measuring collapsibility is related to the dry density and water content of disturbed loess soil samples. In the range of the selected level, when the age is more than 21 days, the collapsibility coefficient tends to be stable basically, and 21 days can be used as the reasonable time node to determine the collapsibility of disturbed loess.
【作者单位】：宁夏大学土木与水利工程学院;宁夏建筑科学研究院有限公司;商丘市审计局;
【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)
【分类号】：TU444

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