摘要
掌握高海拔地区改良膨胀土力学特性是路基合理设计、施工及运营的关键。为更好地研究改良膨胀土的力学性质,对红原县的土样开展不同温度、不同石灰掺量下的无侧限抗压强度和蠕变试验。蠕变试验下应变值与石灰掺量呈负相关;与温度呈正相关。将分数阶微积分引入S-M本构模型并建立了描述土体蠕变行为的分数阶S-M模型,研究表明模型能较好的预测土体的蠕变行为。
Mastering the mechanical properties of improved expansive soils at high altitude is the key to rational design,construction and operation of roadbeds.In order to better study the mechanical properties of improved expansive soils,the unconfined compressive strength and creep tests were carried out at different temperatures and different lime dosages on soil samples in Hongyuan County.The strain values under creep test were negatively correlated with lime dosage;positively correlated with temperature.Fractional order calculus was introduced into the S-M constitutive model and a fractional order S-M model was established to describe the creep behavior of the soil,and the study showed that the model can better predict the creep behavior of the soil.
作者
姚兆明
魏航
李哲
王洵
蹇膨远
方庆
YAO Zhaoming;WEI Hang;LI Zhe;WANG Xun;JIAN Pengyuan;FANG Qing(College of Civil Engineering,Anhui University of Science and Technology,Huainan Anhui 232001,China;Engineering Research Cener of Underground Mine Construction,Ministry of Education,Huainan Anhui 232001,China;School of Highway,Chang'an University,Xi'an 710064,China;The First Geological Brigade of Jiangsu Geological Bureau,Nanjing 210042,China)
出处
《佳木斯大学学报(自然科学版)》
2025年第7期87-90,共4页
Journal of Jiamusi University:Natural Science Edition
基金
矿山地下工程教育部工程研究中心开放研究项目(JYBGCZX2021104)。
关键词
冻土力学
改良膨胀土
分数阶导数
S-M蠕变模型
permafrost mechanics
modified expanded soil
fractional order derivatives
S-M creep model
