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Passive Soil and Pile Analysis

This document contains calculations for determining the ultimate passive pressure on a pile using the Wang-Reese equations. Soil and pile properties are provided, including unit weight, friction angle, embedment depth, and spacing. The equations calculate the depth at which failure wedges intersect, passive forces and pressures on the pile, and the effective ultimate passive pressure at the given depth.

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ali jamiil
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291 views5 pages

Passive Soil and Pile Analysis

This document contains calculations for determining the ultimate passive pressure on a pile using the Wang-Reese equations. Soil and pile properties are provided, including unit weight, friction angle, embedment depth, and spacing. The equations calculate the depth at which failure wedges intersect, passive forces and pressures on the pile, and the effective ultimate passive pressure at the given depth.

Uploaded by

ali jamiil
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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Wang-Reese Eqn's For Ultimate Passive

Pressure

Passive soil properites


Unit weight, γ 120 pcf
drained friction angle, f 30 deg
Effective soil shear/friction factor, use 1
for dense 0.5 for loose 0.67
a 20.1 deg
Failure angle, b 60 deg
Pile properties
Width, b 10 in 0.833333 ft
Embedment, d 12 ft
Spacing, S 8 ft
Clear spacing, Sc 7.166667 ft
Point of evaluation (for passive pressure),
z 8 ft
Lateral pressure based on Rankine
Ka 0.333333
Kp 3
Ko 0.5
Soil properety coeffcients
tan f 0.57735
tan b 1.732051
tan a 0.365948
tan b-f 0.83613

Reese-Wang Eqns Passive Flow Btwn


Flow resistance pressure, Ppuflow 340969.8 plf (multiply second term by pile width?
Maximum Passive Pressure
Passive pressure for cont. wall 23040 plf
Reese-Wang Eqns Passive Wedge
Depth to intersection of wedges, di 6.346633 ft Wedges Intersect
Reese-Wang Eqns Passive Force
Passive Force/Pressure Factor Part 1 Part 2 Part 3 Totals
Wedge failure, Fp 17280 1.273553 6.115156 -1.20723 106816 lbs
Passive Force subtracted due to overlap
(d=di, b=0) 4833.57 0.673565 2.777724 -0.638487 13595.87 lbs
Wedge failure, Fp net 93220.09 lbs
Reese-Wang Eqns Passive Pressure
Ultimate passive resistance, Ppu at depth
z>di 960 2.547107 12.23031 -2.414461 11868.44 plf
Ultimate passive resistance, Ppu at depth
z<=di 960 0.155133 6.064519 4.731783 10513.38 plf
Effective ult. Wedge Pass. pressure at
depth z 11868.44 plf

Effective ult. Passive pressure at depth z 11868.44 plf

Table
Depth hi passive forsubtract effective f Wedge 1
NOTE: "R" IN FWHA IS REACTION AT THE DREDGE LINE BASED ON SOIL PRESSURE FROM
ABOVE THE DREDGE LINE ONLY. (MAY NEEDTO REVISE CALCS)
wedge 2 wedge flow wedge wall wedge min wedge force (wall seg ht x wedge pressures diff
wall seg ht x wedge pressures differeance)

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