大岗山水电站坝区岩体的刚性承压板试验研究  

TESTING STUDY OF RIGID PRESSURE-BEARING PLATE OF DAM ZONE ROCK MASS IN DAGANGSHAN HYDROPOWER STATION

作　　者：张强勇[1] 王建洪[2] 费大军[2] 贺如平[2] 曾纪全[2] 黄彦昆[2] 

机构地区：[1]山东大学岩土与结构工程研究中心,山东济南250061 [2]中国水电顾问集团成都勘测设计研究院,四川成都610072

出　　处：《岩石力学与工程学报》2008年第7期1417-1422,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(40772173);山东省自然科学基金资助项目(Y2007F52)

摘　　要：承压板试验是一种应用广泛的测定岩体变形参数的现场试验方法,根据中国水电顾问集团成都勘测设计研究院在大岗山水电站坝区现场进行的直径达1 m的刚性承压板变形试验资料,详细介绍试验点岩体的加卸载变形关系曲线,根据推导的深部岩体压缩变形公式,计算出了坝址区左右岸试验点岩体的弹性模量、变形模量和等价变形模量等变形参数。通过回归分析,获得坝区试验点岩体的声波波速与变形模量的回归经验方程和高度显著的回归拟合曲线。现场承压板试验的计算分析结果表明:坝区左右岸辉绿岩脉地层的变形参数较小,岩体的压缩变形主要集中在辉绿岩脉软弱夹层上,右岸试验点岩体的变形参数总体小于左岸。这些试验分析结果为有效揭示坝区岩体力学参数的变化规律提供了重要依据。The pressure-bearing plate test is a kind of field test method which is extensively used to determine deformation parameters of rock mass.According to the field deformation test information of large-scale rigid pressure-bearing plate of Dagangshan dam zone,the loading and unloading deformation relation curves of test rock mass are described in detail.The deformation parameters such as elastic modulus,deformation modulus and equivalent deformation modulus of test rock mass are calculated by the deduced compressive deformation formula of deep rock mass.The empirical regression equations and high significance fitting curves of sound wave velocity and deformation modulus for test rock mass are got by regression analysis method.The analytical results of field pressure-bearing plate test indicate that the deformation parameters of diabase dike at dam zone are smaller,the compressive deformation of rock mass mainly concentrates in soft diabase dike interlayer and the deformation parameters of rock mass at right dam zone are smaller than that of left dam zone.These test analysis results provide important basis for revealing changing laws of mechanical parameters of dam zone rock mass.

关 键 词：岩石力学 承压板试验 坝区软弱夹层 加卸载 变形参数 回归分析 

分 类 号：TU45[建筑科学—岩土工程]