软弱夹层对大型水电站坝址砂岩工程力学性质影响研究  

Influence of Weak Interlayer on Mechanical Properties of Sandstone at Dam Site of Large Hydropower Station

作　　者：古丽苏玛依·阿不都萨塔尔 Gulisumayi·ABUDUSATAER(Xinjiang Water Resources and Hydropower Survey Design and Research Institute,Changji 831100,Xinjiang,China)

机构地区：[1]新疆水利水电勘测设计研究院,新疆昌吉831100

出　　处：《水利科技与经济》2021年第9期106-109,共4页Water Conservancy Science and Technology and Economy

摘　　要：岩体软弱夹层是危害水电站坝址边坡稳定性的重要因素。为研究软弱夹层对水电站大坝坝址砂岩地层工程力学性质的影响,依托于西北地区某水电站工程,室内展开含不同倾角软弱夹层岩体的单轴压缩力学试验。研究发现,软弱夹层倾角对岩体的破坏形态具有较大影响,夹层倾角越大,岩体的破坏特征越复杂。随着软弱夹层倾角的增大,岩体的单轴压缩强度和弹性模量呈先减小后增大的变化趋势。当夹层倾角为45°时,含软弱夹层岩体的承载能力最差。研究成果可为我国水电站坝址岩体加固提供一定的参考与借鉴。The weak intercalation of rock mass is an important factor endangering the stability of dam site slope of hydropower station.To investigate the influence of weak intercalation on the engineering mechanical properties of sandstone stratum at dam site of hydropower station,uniaxial compression mechanical tests of rock mass with weak intercalation with different dip angles were carried out based on a hydropower station project in mountainous area of Northwest China.It is found that the dip angle of weak intercalation has a significant influence on the failure mode of rock mass.The larger the dip angle of weak intercalation is,the more complex the failure characteristics of rock mass are.With the increase of dip angle of weak interlayer,the uniaxial compressive strength and elastic modulus of rock mass with weak interlayer decrease first but increase subsequently.When the dip angle of interlayer is 45°,the bearing capacity of rock mass with weak interlayer is the worst.The research results provide a reference for the rock mass reinforcement of hydropower station dam site in China.

关 键 词：水电站 岩石坝基 软弱夹层 夹层倾角 力学性质 

分 类 号：TU45[建筑科学—岩土工程]