摘要
为研究不同振动频率下受酸液侵蚀压实黄土的动弹性模量、阻尼比、振陷变形以及孔压发展变化的规律,进行了一系列动三轴试验.通过GDS动三轴试验系统提供不同频率的振动荷载,选取pH=5的酸液配制黄土模拟酸性压实黄土.结果表明:当试样达到同一动应变时,随着振动频率从1 Hz增加到5 Hz,动弹性模量、阻尼比、动孔压均不断增大;同一频率下,振陷变形随着振动次数的增加而增大;同一振次下,振陷变形随着振动频率的增加而减少;同一频率下,pH=5酸液配制的试样较pH=7蒸馏水配制的试样的动弹性模量、阻尼比、孔压减小,振陷变形增大.
To study the influence of vibration frequency on the dynamic elastic modulus, damping ratio, vibration deformation and pore pressure in the loess subgrade with acid corrosion, a series of dynamic triaxial tests were conducted. The vibration loads of different frequencies were provided through the GDS dynamic tri-axial testing apparatus. The pH=5 acid was selected to prepare the loess to simulate acid compacted loess. The results show that when the same dynamic strain is achieved, the dynamic e- lastic modulus increases with the increase of vibration frequency, the damping ratio increases with the increase of vibration frequency, the dynamic pore pressure increases with the increase of vibration fre- quency; The vibration deformation increases with the increase of vibration times under the same vibra- tion frequency; The vibration deformation decreases with the increase of vibration frequency under the same vibration times; The sample made with acid liquor of pH=5 compared with that with distilled wa- ter of pH=7, the dynamic elastic modulus, damping ratio, pore pressure decreases and the vibration de- formation increases.
作者
寇晓辉
张强
董晓强
KOU Xiao-hui ZHANG Qiang DONG Xiao-qiang(College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, Chin)
出处
《中北大学学报（自然科学版）》
北大核心
2017年第2期249-254,共6页
Journal of North University of China(Natural Science Edition)
基金
国家自然科学基金资助项目(51178287)
山西省科技创新重点团队建设计划(2014131019)
黄土地区公路建设与养护技术交通行业重点实验室开放基金资助项目(KLTLR-Y13-4)
关键词
振动频率
酸性压实黄土
动力特性
vibration
requency
acid compacted loess
dynamic characteristic
