在深覆盖红层地区建抛物线拱坝的设计实践  

Design practice of parabolic arch dam in deep covered red rock stratum

作　　者：陈大松 刘其文 罗健 

机构地区：[1]贵州省水利水电勘测设计研究院,贵州贵阳550002

出　　处：《人民长江》2008年第12期10-11,15,共3页Yangtze River

摘　　要：红层在我国分布较广,但在红层上修建的水工建筑物较少,所兴建的水库大坝多为当地材料坝。随着经济不断发展,近年来水电工程建设越来越多地向红层地区深入,给勘察、设计和施工提出了越来越多新的课题。大多数红层饱和单轴抗压强度小于30 MPa,属于较软岩,其变形模量低、强度低、允许承载力小、易风化、覆盖层深,但完整性好,水文地质条件简单。中小拱坝压应力不大,可利用红层完整性好,水文地质条件简单的优势,对地基稍加处理即可满足修建双曲拱坝的需要。以云南省大姚县渔泡江三级电站工程为例,论述了在红层深覆盖层地区修大坝的可行性。The red rock stratum distributes widely in China.The hydraulic structure built on red rock stratum is small in number and the materials for reservoir dam are taken in local area.Along with economic development,in recent years,the hydropower projects built in red rock stratum area become more and more,and more and more new issues should be researched in reconnaissance,design and construction.For most red rock stratum,the uniaxial compressive strength is lower than 30MPa,belonging to comparable soft rock,featuring low deformation module,low strength,low permissible bearing capacity,easily weathering,deep covered stratum,favorable integrity,simple hydrologic and geologic condition.For low stress,the middle and small arch dam can take advantage of favorable integrity of red rock stratum,simple hydrologic and geologic conditions,simply treating the foundation can meet the requirement of arch dam construction.

关 键 词：红层 深覆盖层 岩体力学参数 抛物线双曲拱坝 云南渔泡江三级电站 

分 类 号：TV642.42[水利工程—水利水电工程]