昆明呈贡地区重塑红土动力特性研究  

Study on Dynamic Features of Remolded Laterite in Chenggong Area,Kunming

作　　者：李帆 郑家毓 符必昌[1] Li Fan;Zheng Jiayu;Fu Bichang(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming,Yunnan 650032)

机构地区：[1]昆明理工大学国土资源工程学院,昆明650032

出　　处：《中国煤炭地质》2021年第11期68-72,共5页Coal Geology of China

摘　　要：以昆明呈贡地区红土作为研究对象,利用TAJ-20型动三轴仪对其开展一系列动三轴试验,分析固结围压及固结比对红土动力特性,包括动应力-动应变关系、动剪切模量以及阻尼比的影响。试验结果表明,该地区红土动应力应变关系变化规律呈现出明显的非线性关系,符合双曲线模型;固结围压和固结比对动模量及阻尼比均有一定影响,表现为随着固结围压、固结比的增大,动弹性模量E_(d)及动剪切模量G_(d)均增大;阻尼比随着固结围压增大而减小,随固结比增大而增大。Taking the laterite in Chenggong area,Kunming as subject investigated,using TAJ-20 dynamic triaxial apparatus has carried out a series of tests on laterite and analyzed impacts from consolidation confining pressure and consolidation ratio on laterite dynamic features,including dynamic stress-dynamic strain relationship,dynamic shear modulus and damping ratio.Tested results have shown that laterite dynamic stress-dynamic strain relationship variation pattern in the area presented obvious non-linear relationship and conformed to hyperbola model.Consolidation confining pressure and consolidation ratio all have certain impacts on dynamic shear modulus and damping ratio,assumed with the increasing of consolidation confining pressure and consolidation ratio,dynamic modulus of elasticity E_(d) and dynamic shear modulus G_(d) all increasing.While damping ratio will decreasing with consolidation confining pressure increasing and increasing with consolidation ratio increasing.

关 键 词：红土 动三轴试验 动力特性参数 土动力学 

分 类 号：P642.132[天文地球—工程地质学]