Assessment of the role of slit as a safety valve in failure of levees  

作　　者：C.S.P.OJHA V.P.SINGH D.D.ADRIAN 

机构地区：[1]Department of Civil Engineering, Indian Institute of Technology,Roorkee, Uttaranchal 247667, India,Prof. [2]Caroline and William N. Lehrer Distinguished Chair in Water Engineering, Professor of Civil & Environmental Engineering and Professor of Biological and Agricultural Engineering, Texas A & M University,2117 TAMU, Dept. of Biological & Agric. Engineering, 321 Scoates Hall, College Station, Texas 77843-2117, USA [3]Department of Civil and Environmental Engineering, Louisiana State University,Baton Rouge, LA 70803-6405, U. S. A.,Rubicon Professor

出　　处：《International Journal of Sediment Research》2008年第4期361-375,共15页国际泥沙研究（英文版）

基　　金：the financial support of contract #DACW39-99-C-0028 from the Corps of Engineers to Louisiana State University.

摘　　要：The development of a narrow channel or slit due to piping just underneath the base of levees channel has been reported to be useful to withstand the increase in the head beyond critical head conditions. Also, the maximum slit length has been emphasized to be up to half of the base width. By developing a model of critical head considering slit, it is found that the critical head can increase with the development of slit length only under certain conditions. Analysis of piping failure data indicates that the critical head expressions considering slit length constitute a potentially useful model for critical head.The development of a narrow channel or slit due to piping just underneath the base of levees channel has been reported to be useful to withstand the increase in the head beyond critical head conditions. Also, the maximum slit length has been emphasized to be up to half of the base width. By developing a model of critical head considering slit, it is found that the critical head can increase with the development of slit length only under certain conditions. Analysis of piping failure data indicates that the critical head expressions considering slit length constitute a potentially useful model for critical head.

关 键 词：Failure of levee PIPING Flood defense Water head seepage erosion 

分 类 号：TV871[水利工程—水利水电工程]