Spatial dynamic response of aeolian sand subgrade reinforced by geocellOA
[Objective]The spatial dynamic response of a new desert highway subgrade structure by geocell reinforcement with aeolian sand is studied.[Methods]Based on the dynamic triaxial test,a field test via monitoring the response acceleration change is carried out.The attenuation law and dynamic response range of the response acceleration along the depth and horizontal directions of the subgrade are obtained for the geocell-reinforced subgrade structure.The mechanism of dynamic response of geocell-reinforced materials to aeolian sand subgrade is further discussed.[Results]The result show that both vehicle load and vehicle speed have a great influence on the response acceleration of the new aeolian sand subgrade.The response acceleration shows a nonlinear attenuation in the depth direction,and the attenuation rate gradually slows down with increasing depth.Meantime,the horizontal direction shows a variation of exponential decay.Therefore,an attenuation prediction model of response acceleration along the horizontal direction of aeolian sand subgrade is established.[Conclusion]Based on this field test condition,the most dominant dynamic response region of the subgrade is in a range of 1.2 m in depth and 2.5 m in horizontal.The reinforcement effect of geocell on aeolian sand increases the confining pressure level,and restricts the lateral displacement of soil.In addition,the generation of shear bands in the soil is inhibited by the reinforcement effect.This makes the energy dissipation of the subgrade soil more obvious.
LIU Jie;LIU Qinli;LIU Xuejun;LI Kaiqiang;HU Changtao;AI Yuhao
Xinjiang Transportation Planning,Survey and Design Research Institute Co.,Ltd.,Urumqi 830006,Xinjiang,China Xinjiang Key Laboratory for Safety and Health of Transportation Infrastructure in Alpine and High-altitude Mountainous Areas,Urumqi 830006,Xinjiang,China College of Civil Engineering and Architecture Xinjiang University,Urumqi 830047,Xinjiang,ChinaXinjiang Transportation Planning,Survey and Design Research Institute Co.,Ltd.,Urumqi 830006,Xinjiang,China Xinjiang Key Laboratory for Safety and Health of Transportation Infrastructure in Alpine and High-altitude Mountainous Areas,Urumqi 830006,Xinjiang,China College of Civil Engineering and Architecture Xinjiang University,Urumqi 830047,Xinjiang,ChinaXinjiang Academy of Architectural Science(Limited Liability Company),Urumqi 830046,Xinjiang,ChinaXinjiang Transportation Planning,Survey and Design Research Institute Co.,Ltd.,Urumqi 830006,Xinjiang,China Xinjiang Key Laboratory for Safety and Health of Transportation Infrastructure in Alpine and High-altitude Mountainous Areas,Urumqi 830006,Xinjiang,China College of Civil Engineering and Architecture Xinjiang University,Urumqi 830047,Xinjiang,ChinaXinjiang Transportation Planning,Survey and Design Research Institute Co.,Ltd.,Urumqi 830006,Xinjiang,China Xinjiang Key Laboratory for Safety and Health of Transportation Infrastructure in Alpine and High-altitude Mountainous Areas,Urumqi 830006,Xinjiang,ChinaXinjiang Transportation Planning,Survey and Design Research Institute Co.,Ltd.,Urumqi 830006,Xinjiang,China Xinjiang Key Laboratory for Safety and Health of Transportation Infrastructure in Alpine and High-altitude Mountainous Areas,Urumqi 830006,Xinjiang,China
建筑与水利
subgrade engineeringgeocellaeolian sandlarge-scale triaxial testspatial dynamic responsedynamic triaxial testfield testinfluencing factors
《水利水电技术(中英文)》 2026 (4)
P.187-201,15
National Natural Science Foundation of China(42077261)The Research Fund Project of Xinjiang Transportation Planning,Survey and Design Research Institute Co.,Ltd.(KY2020112301,KY2021100901)。
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