路基工程Issue(4)：48-54,7.DOI:10.13379/j.issn.1003-8825.202403017
干湿循环对压实红黏土动强度与动模量影响研究
Study on Effect of Dry and Wet Cycle on Dynamic Strength and Dynamic Modulus of Compacted Red Clay
摘要
Abstract
Triaxial samples with a compaction degree of 90％,93％and 96％were prepared using a self-made one-time molding mold,and the samples were subjected to spray humidification and warm air drying with a self-made dry and wet cycle test device.The samples with different humidity and different dry and wet cycles were obtained by quantitative simulation of the change process of subgrade soil moisture content on site.The change law of dynamic strength and dynamic modulus were tested by dynamic triaxial test of constant water content.The results show that the cumulative strain can be divided into plastic stability type,critical type and breaking type with the change of vibration times.The critical dynamic stress and maximum dynamic modulus decrease with the decrease of compaction degree,and the decreasing range increases gradually,and the influence of compaction degree weakens with the increase of water content.The critical dynamic stress and the maximum dynamic modulus decrease with the increase of water content,and the critical dynamic stress decreases relatively greatly when the water content is greater than the optimal water content.The critical dynamic stress and maximum dynamic modulus decrease with the increase of the number of cycles,and the decreasing range decreases gradually.关键词
红黏土/湿度变化/干湿循环/交通荷载/三轴试验/临界动应力/动弹性模量Key words
red clay/change of humidity/dry and wet cycle/traffic load/dynamic triaxial test/critical dynamic stress/dynamic modulus分类
交通工程引用本文复制引用
刘峥嵘,李慧丽,刘维正,罗元军,黄轩嘉..干湿循环对压实红黏土动强度与动模量影响研究[J].路基工程,2024,(4):48-54,7.基金项目
国家自然科学基金资助项目(52078500) （52078500）
湖南省自然科学基金(2019JJ40344) （2019JJ40344）
