风化凝灰熔岩物理和力学特性的试验研究  

Experimental study on physical and mechanical properties of weathering degree on tufflava

作　　者：章仕灵[1,2] 邓涛 Zhang Shiling;Deng Tao(The Engineering Technical College of Chengdu University of Technology,Leshan 614000,China;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China;College of Civil Engineering,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]成都理工大学工程技术学院,四川乐山614000 [2]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [3]福州大学土木工程学院,福建福州350108

出　　处：《山西建筑》2020年第20期95-97,共3页Shanxi Architecture

摘　　要：对福建泉三高速新岭格隧道中的凝灰熔岩进行了物理和力学试验。揭示了风化强弱程度对凝灰岩饱和吸水特性、单轴抗压强度、应力—应变曲线关系、峰值强度对应的应变和岩石破坏形式等物理力学特性的影响。得出了该凝灰岩试件单轴压缩破坏的半过程曲线及一些重要参数和特性,并拟合出了不同风化程度下的凝灰熔岩其饱和吸水率与单轴抗压强度之间的关系式。该研究成果可为同类地区凝灰熔岩地基的承载力、凝灰熔岩边坡和隧道及地下工程稳定性分析提供一定的参考。The uniaxial compression deformation and water absorption experiment on tufflava of different weathering degree are carried out with tunnel surrounding rock of Fujian Quansan highway in Fujian province.The influence of the degree of weathering on the physical and mechanical properties of tufflava,such as saturated water absorption,uniaxial compressive strength,stress-strain curve relation,strain corresponding to peak strength and rock failure form is revealed.The uniaxial compression failure curve and some important characteristics and parameters of the tufflava were obtained.The non-linear relationships between water absorption and uniaxial compressive strength under saturation conditions of tufflava under different weathering degree are obtained by the regression analysis on the observed data.The results of this study can provide some references for similar projects in similar areas.

关 键 词：风化程度 岩石力学 凝灰熔岩 压缩变形 

分 类 号：TU458[建筑科学—岩土工程]