地震工程学报2024，Vol.46Issue(1)：1-9,9.DOI:10.20000/j.1000-0844.20220418003
红层泥岩填料的力学特性及本构模型研究
Mechanical properties and constitutive model of the red mudstone fill material
摘要
Abstract
To construct road engineering in red mudstone regions,local materials are often used as subgrade fillers because of the shortage of materials and cost problems.To study the applicability of red mudstone fill material,weathered red mudstone fill material from a site in Yongdeng County,Gansu Province,was selected as the research object.A series of consolidated undrained(CU)triaxial shear laboratory tests was conducted to explore the effects of water content,confi-ning pressure,and compaction degree on stress-strain curve,peak(residual)strength,and shear strength index.Furthermore,different types of stress-strain curves were fitted with the corre-sponding models.The results show that water content,confining pressure,compaction degree affect the physical and mechanical properties of the red mudstone fill material.For curves confor-ming to strain softening law,the fitting effect of the generalized hyperbolic model of Shen Zhujiang is not good.For curves conforming to strain hardening law,the fitting effect of the Duncan-Chang model is good.The research results provide a reference for the treatment and ma-intenance of red mudstone subgrades in Gansu Province.关键词
道路工程/红层泥岩填料/三轴CU剪切试验/沈珠江推广双曲线模型/Duncan-Chang模型Key words
road engineering/red mudstone fill material/CU triaxial shear test/generalized Shen Zhujiang hyperbolic model/Duncan-Chang model分类
土木建筑引用本文复制引用
余云燕,崔文豪,罗崇亮,杜乾中,李盛..红层泥岩填料的力学特性及本构模型研究[J].地震工程学报,2024,46(1):1-9,9.基金项目
甘肃省科技计划资助(21YF5GA050) （21YF5GA050）
甘肃省教育厅产业支撑计划项目资助(2021CYZC-28) （2021CYZC-28）
甘肃省交通运输厅科技研发项目资助(2021-12) （2021-12）
甘肃省基础研究创新群体项目(21JR7RA347) （21JR7RA347）
