河道淤泥气泡混合土物理性质的多因素影响及敏感性分析  

Multi-factor Influence and Sensitivity Analysis on Physical Properties of Foamed Mixture Lightweight Soil Using River Sludge

作　　者：刘增祥[1] 骆顺成 陆勇 娄玥玥 LIU Zeng-xiang;LUO Shun-cheng;LU Yong;LOU Yue-yue(Capital Construction Division,Soochow University,Suzhou 215021,China;Jiangsu Yadao Construction Engineering Testing Co.,Ltd.,Nanjing 210049,China;School of Civil Engineering,Suzhou University ofScience and Technology,Suzhou 215011,China)

机构地区：[1]苏州大学基本建设处,江苏苏州215021 [2]江苏亚道建设工程检测有限公司,南京210049 [3]苏州科技大学土木工程学院,江苏苏州215011

出　　处：《长江科学院院报》2025年第1期194-200,共7页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(51378327);江苏省高等学校基础科学(自然科学)研究项目(22KJB170020)。

摘　　要：为掌握河道淤泥气泡混合土(FMLSS)的基本物理特性,以苏州市某河道清淤的淤泥质土为研究对象,通过优化的正交试验从物理特性角度研究不同因素对FMLSS密度和渗透性的影响,并采用极差分析方法对其敏感性进行分析。试验结果表明:FMLSS密度随气泡含量增加而显著减小,随水泥掺入量增加而显著增大,随含水率增加而显著减小,随养护龄期增长而微幅变化;FMLSS渗透系数随气泡含量增加而增大,随水泥掺入量增加而减小,随含水率增加呈现增大且变化趋势接近于成倍数的线性递增,随养护龄期增加呈现先快速减小后逐渐趋稳;各因素对密度和渗透系数影响的敏感性排序分别为:气泡含量>含水率>水泥掺入量>养护龄期、含水率>养护龄期>水泥掺入量>气泡含量;工程应用中应将气泡含量作为FMLSS密度和轻质性的主控要素,将含水率作为FMLSS渗透系数的主控要素。研究结果可为疏浚淤泥资源化利用和环境保护提供参考依据。To investigate the fundamental physical properties of foamed mixture lightweight soil using river sludge(FMLSS),river sludge collected from a river in Suzhou was used as the research material.An optimized orthogonal test was conducted to study the effects of various factors on the density and permeability of FMLSS,and sensitivity analysis was performed using the range analysis method.Results show that:1)The density of FMLSS decreased significantly with increasing air foam content and water content,but increased significantly with increasing cement content,and changed slightly with increasing curing age.2)The permeability coefficient of FMLSS increased with rising air foam content,reduced with increasing cement content,nearly multiplied with increasing water content in a linear manner,and plunged with extending curing age before gradually stabilizing.3)Density was most sensitive to air foam content,followed by water content,cement content,and curing age in a descending order;permeability coefficient was most sensitive to water content,followed by curing age,cement content,and air foam content in a descending order.4)In engineering applications,air foam content should be the primary control factor for density and lightweight properties of FMLSS,while water content should be the primary control factor for permeability coefficient.The research findings serve as valuable reference for the resource utilization of dredged silt and environmental protection.

关 键 词：河道淤泥气泡混合土 物理特性 密度 渗透系数 正交试验 敏感性分析 

分 类 号：TU411[建筑科学—岩土工程] X141[建筑科学—土工工程]