基于PCA模型土体临界水力坡降的预测  

The Predication of Critical Hydraulic Gradient of Soil Based on PCA Model

作　　者：赵亚永[1] 

机构地区：[1]郑州大学水利与环境学院

出　　处：《科技致富向导》2013年第20期54-54,95,共2页Guide of Sci-tech Magazine

摘　　要：渗透破坏对堤防工程危害很大,形式主要有管涌和流土。影响土体发生渗透破坏的因素有其颗粒级配、密实度、渗透系数、土体结构等。发生渗透破坏的必要条件是土体的水力坡降大于其临界水力坡降,临界坡降的大小反应了土体发生渗透破坏的难易程度。本文基于文献中渗透破坏实验数据,运用主成分回归分析模型建立了临界水力坡降与土体各物理性质的关系。Seepage failure does great harm to the dike projects ,its main forms of failure are piping and soil flow.The particle size distribution. density,permeability coefficient,structure of soil are all factors which all influence the seepage failure.The essential condition of seepage failure is that the hydraulic gradient must be greater than the critical hydraulic gradient, which reacts the ease of seepage failure.This article build a relationship between critical hydraulic and the physical prosperities of soil based on the experimental data in the literatures using the PCA analysis model

关 键 词：渗透破坏 PCA 临界水力坡降 

分 类 号：TV871[水利工程—水利水电工程]