南水北调西线工程岩体变形特性现场试验研究  

In-Site Test Research on Deformation Characteristics of Rock Mass in West Route of South-to-North Water Transfer Project

作　　者：闫长斌[1,2] 刘振红[2] 岳永峰[2] 

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]黄河勘测规划设计有限公司,河南郑州450003

出　　处：《人民黄河》2014年第3期76-79,共4页Yellow River

基　　金："十一五"国家科技支撑计划项目(2006BAB04A06);黄河勘测规划设计有限公司自主研究开发项目(2009-ky01)

摘　　要：为准确获取南水北调西线工程坝址区岩体变形指标,采用刚性承压板法,在阿达坝址、仁达坝址和阿安坝址平硐中开展了岩体变形现场试验。结果表明:3个坝址区岩体变形模量、弹性模量受岩性组成影响明显;压力—变形关系曲线类型大部分为近似直线型或下凹型,这与岩体受节理裂隙切割情况、加载方向以及岩体完整度等密切相关;加载方向和应力水平对岩体变形特性产生一定影响,变形模量随应力的增大总体呈逐渐增大趋势,弹性模量与应力水平的关系受加载方向影响,随应力变化的规律不明显;现场岩体变形测试结果与地震波速测试结果、规范建议值的对比分析表明,坝址区岩体总体为Ⅴ类,三者之间具有较好的对应性,现场岩体变形试验参数测试结果是可靠的。In-situ deformation test was carried out at the adits in Ada,Renda and Aan dam sites by the rigid pressure-bearing plate method,in or-der to obtain the deformation index of rock mass accurately. The results show that the elastic modulus and deformation modulus of rock mass at three dam sites are obviously influenced by lithology. The types of pressure and deformation curves are mostly lines or down concaves,which are correla-tive with joints,loading direction and integrity of rock mass and so on closely. The influences of loading direction and stress level on the deforma-tion characteristics of rock mass are analyzed. The deformation modulus increases with stress as a whole. Influenced by loading direction,the change law of elastic modulus with stress is not obvious. Contrasted analysis show that there are good correlativity among in-situ test results of de-formation characteristics of rock mass and seismic velocity results and proposed values given by specifications. The rock mass at the dam sites are classⅤ,and the in-situ test results of deformation characteristics of rock mass are credible and effective.

关 键 词：岩体变形特性 弹性模量 变形模量 刚性承压板 南水北调西线工程 

分 类 号：TV68[水利工程—水利水电工程]