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A platform for research: civil engineering, architecture and urbanism
Mathematical Analyses of Landside Seepage Berms
This study extends solutions for mathematical analyses of seepage berms presented in (Investigation of Underseepage and Its Control, Lower Mississippi River Levees,' October 1956, AD-A012 771. A plot of the required seepage berm width, B, versus the ratio of the permeability of the berm to the top blanket, K, for various safety factors indicates B is very sensitive to K for K < or = 1. When the uplift safety factor varies from 1.5 at the landside levee toe to 1.0 at the landside seepage berm toe, the berm width is only slightly greater than that for a uniform safety factor of 1.0. If the uplift safety factor is greater than 1.0 at the berm toe, then as the top blanket becomes thinner, the berm width becomes longer. Thus, other methods of underseepage control should be investigated to determine whether they may be more economical. When the seepage berm is impervious, the berm width is a maximum. When the seepage berm is infinitely pervious, the berm width is a minimum. Therefore, seepage berms should be constructed of the most pervious soils available (with adequate provisions for control of surface erosion and internal piping) in the interest of economy.
Mathematical Analyses of Landside Seepage Berms
This study extends solutions for mathematical analyses of seepage berms presented in (Investigation of Underseepage and Its Control, Lower Mississippi River Levees,' October 1956, AD-A012 771. A plot of the required seepage berm width, B, versus the ratio of the permeability of the berm to the top blanket, K, for various safety factors indicates B is very sensitive to K for K < or = 1. When the uplift safety factor varies from 1.5 at the landside levee toe to 1.0 at the landside seepage berm toe, the berm width is only slightly greater than that for a uniform safety factor of 1.0. If the uplift safety factor is greater than 1.0 at the berm toe, then as the top blanket becomes thinner, the berm width becomes longer. Thus, other methods of underseepage control should be investigated to determine whether they may be more economical. When the seepage berm is impervious, the berm width is a maximum. When the seepage berm is infinitely pervious, the berm width is a minimum. Therefore, seepage berms should be constructed of the most pervious soils available (with adequate provisions for control of surface erosion and internal piping) in the interest of economy.
Mathematical Analyses of Landside Seepage Berms
R. A. Barron (author)
1980
62 pages
Report
No indication
English
Mathematical Analyses of Landside Seepage Berms
| NTIS | 1984
NTIS | 1992
Airport Landside Planning and Operations
NTIS | 1992