高速铁路隧道板岩膨胀特性及机理研究  

The Swelling Characteristics and Mechanism Research of Slates in High-speed Railway Tunnel

作　　者：李其帅 杨会杰[2] 周欣[1] 

机构地区：[1]中国地质大学(武汉)工程学院,武汉430074 [2]四川省水利水电勘测设计研究院勘察分院,成都610000

出　　处：《科学技术与工程》2014年第27期112-115,121,共5页Science Technology and Engineering

基　　金：国家自然科学基金资助项目(41202201)资助

摘　　要：对武广高速铁路部分以板岩为主的隧道进行了岩心取样;并对其展开了膨胀特性试验。试验分别获取了板岩膨胀率与吸水时间、膨胀率与吸水率以及膨胀率与应力状态之间的关系。通过拟合,得到了板岩侧向约束膨胀率随时间变化的规律,将国内其他学者的研究成果与该拟合规律进行代入计算,得出板岩膨胀率和吸水率之间的关系式。在综合考虑吸水率和应力状态对膨胀变形影响的基础上,引入时间效应,建立了板岩的膨胀本构方程。结果表明:板岩侧向约束膨胀率与吸水时间之间呈指数函数关系,板岩轴向膨胀率随轴向荷载的增加呈负对数函数减小。最后,从微观的角度对板岩的膨胀特性机理进行了相关分析。Part of Wuhan-Guangzhou high-speed railway tunnel with slate had been cored and done the swelling characteristics test. The relationship of slate swelling ratio and water absorption time,slate swelling ratio and water absorption,slate swelling ratio and stress state were obtained from the test. The regular of the lateral restraint inflation rates change over time was obtained from fitting analysis. Will the domestic research achievements of other scholars and the fitting rule generation into the calculation,the relation between slate swelling rate and the water absorption was got. Based on the consideration of influence on swelling deformation from water absorption and stress state,the constitutive equation of slate swelling was established after introducing the time effect. The results indicate that the relationship between the lateral restraint expansion ratio and water absorption time is exponential function. The axial expansion rate greatly decreases in the form of logarithmic function with the increase of the axial load. Finally,the mechanism of swelling characteristics of slate has carried on the correlation analysis from the angle of the micro.

关 键 词：高速铁路隧道 板岩 膨胀特性 机理研究 

分 类 号：TU452[建筑科学—岩土工程]