人民长江2024，Vol.55Issue(1)：229-235,7.DOI:10.16232/j.cnki.1001-4179.2024.01.032
重塑条件对红黏土力学特性影响试验研究
Effect of remolding conditions on mechanical properties of laterite
摘要
Abstract
The remolding conditions play a crucial role in influencing the mechanical properties of remolded soil samples.To an-alyze the impact of various remolding conditions on the mechanical properties of remolded soil in geotechnical tests for embank-ment construction,unconsolidated undrained triaxial tests were conducted in this study to investigate the effects of remolding con-ditions(different crushing methods,moisture contents,and sample preparation methods)on the mechanical properties of remolded laterite.The mechanism influencing the mechanical strength properties due to remolding conditions was elucidated through scan-ning electron microscopy(SEM)images.The results indicate that when the moisture content is low,the main factor affecting the strength of laterite is the preparation method.When the moisture content increases,the method of soil crushing becomes the main control factor.Combining with the microscopic test,it further reveals that different soil crushing methods can obtain soil particles of different gain size distributions.Mechanical crushing methods will make the soil particles gather into different amounts of"coarse particles",change the soil grain distribution and thus affect the relevant mechanical properties.Different sample prepara-tion methods are reflected in the different ordered arrangement of soil particles,thus changing the shear strength of soil.关键词
红黏土/重塑条件/力学特性/不固结不排水三轴试验/微观分析Key words
laterite/remodeling conditions/mechanical properties/unconsolidated undrained triaxial test/micro analysis分类
建筑与水利引用本文复制引用
冉宇玲,杨秀娟,柏巍,樊恒辉,李科..重塑条件对红黏土力学特性影响试验研究[J].人民长江,2024,55(1):229-235,7.基金项目
国家自然科学基金面上项目(41772339) （41772339）
陕西省科技发展计划项目(2023-JC-YB-463) （2023-JC-YB-463）
