路基工程Issue(5)：59-64,6.DOI:10.13379/j.issn.1003-8825.202405034
干湿循环对木质素改良粉土力学特性的影响
Effect of Dry-Wet Cycle on Mechanical Properties of Lignin-modified Silt
摘要
Abstract
The triaxial shear test and unconfined compressive strength test were carried out on two kinds of lignin-modified soils after multiple moisture absorption-desorption cycles,so as to study the influence of dry-wet cycle effect on the improved soil,and real the mechanism of dry-wet cycle on the microstructure of the improved soil by means of the scanning electron microscopy(SEM).The result shows that,the compressive strength and cohesive strength of 6％lignin+3％lime improved soil takes a tendency to increase first and then decrease due to dry-wet cycles,but the attenuation gradually decreases.The compressive and shear strength of 9％lignin+3％lime improved soil decrease gradually after dry-wet cycle,and the stress-strain relationship was strain softening.Electron microscope scanning of a 6％lignin+3％lime improved soil reveals more developed cementing material,smaller inter-particle pores and stronger bonds after one dry-wet cycle.The water stability and resistance to dry-wet effect of 6％lignin+3％lime improved soil are better than that of 9％lignin+3％lime improved soil.关键词
路基工程/干湿循环/掺量/三轴试验/影响规律/耐久性Key words
roadbed engineering/dry-wet cycle/dosage/triaxial test/influence law/durability分类
建筑与水利引用本文复制引用
程菲菲,刘笑..干湿循环对木质素改良粉土力学特性的影响[J].路基工程,2025,(5):59-64,6.基金项目
国家自然科学基金资助项目:多元桩加固可液化饱和粉土地基作用机理与变形特性研究(51208510) （51208510）
