141580420 design of reinforced concrete manhole copy
DESCRIPTION
manTRANSCRIPT
MANHOLE TYPE A
Page 1
Manhole parameters
580 mm 2555 mm B = 1700 mm
400 mm 200 mm W = 1700 mm
250 mm h = 2755 mm I = 1950 mm
H = 3155 mm L = 2200 mm
Ground parameters
Cohesion, c = 0
Internal friction, O = 30 radian = 0.52
Unit weight of soil (dry) = 19 0.33
Unit weight of soil (saturated) = 20
Assumed soil bearing capacity = 150
Loadings
Point/Wheel load, P = 300 kN FOS (Grd & S. Weight) = 1.2
Surcharge, q = 20 FOS (Point load) = 1.6
hst = h
1 =
hsb
= hc =
hw =
kN/m2
o
kN/m3 ka
=
kN/m3
kN/m2
kN/m2
Cc
DD
BA
hst
hw
t2
hchc1
h
B
W
l l
h1 H H
L L
hsb
hw
hw
t2
hw
t2
hw
t2
hw
t2
MANHOLE TYPE A
Page 2
Density of concrete = 24
Design Parameters30
460
Conc. cvr = 40 mm
kN/m3
fcu
= N/mm2
fy
= N/mm2