考虑渗流和应力相互作用下高坝坝基参数的相关性  

Correlations of related parameters of dam foundation in consideration of the interaction between seepage and stress

作　　者：张贵金[1] 徐卫亚[2] 

机构地区：[1]长沙理工大学河海工程学院,湖南长沙410076 [2]河海大学岩土工程研究所,江苏南京210098

出　　处：《水利学报》2005年第8期961-965,共5页Journal of Hydraulic Engineering

基　　金：湖北省"十五"科技攻关项目(2002507430);教育部科学技术研究重点项目(01099)

摘　　要：高坝坝基处在渗流应力耦合作用的水文地质工程地质环境,涉及的物理力学参数及水力学参数之间存在着显著的多重相关性,本文引入偏相关系数度量这种相关关系,综合考虑河床典型基岩的力学参数、水力学参数及其荷载效应。作为算例,对水布垭工程典型坝段基岩的水力力学参数的相关性进行了研究。计算得到这些参数之间的简单相关关系和偏相关关系,结果表明偏相关系数能很好的解释各类参数间相互关系的物理意义。特别是在对高坝坝基进行参数敏感性分析和可靠度风险研究时,考虑这种相关性才是完整合理的。Multiple correlations exist among related mechanical parameters and hydraulic parameters of seepage. The partial correlative coefficient is introduced to measure these correlations and used to comprehensively describe the effects of mechanical parameters of foundation rock, hydraulic parameters and stress. The proposed method is applied to analyze the related parameters in the dam foundation of the Shuibuya Project. It is found that the partial correlative coefficient can be well used to explain the correlations among various parameters in the sense of physics. It is very important to the sensitivity analysis of parameters and reliability analysis on dam.

关 键 词：坝基 力学参数 多重相关性 偏相关系数 

分 类 号：TV223[水利工程—水工结构工程]