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Bund Wall
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Bund Wall
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Author:
ronaldyyahya
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DESIGN OF BUND WALL
Bund Wall Properties : T 1 2800mm T 2 500mm T 3 500mm b 300mm c 5000mm a
( c b) 2
a 2.35 m
Material Properties : Fc' 24.9Mpa Fy 390Mpa
bar 16mm shear 0.75 momen 0.8 Density of Material :
conc 24
kN 3
water 10
m
kN
kN
soil 18
3
m
m
3
Properties of Soil base on soil investigation investigation report point 5.4 on recomendation shallow foundation we have bearing capacity : qall 50
kN m
2
... (allowable bearing base on recomendation, see attachment)
Check Stability : 1
kN
water T 12
H 39.2
w1 b T 1 T 2 conc
w1 23.76
w2 a T2 conc
w2 28.2
w3 c T 3 conc
w3 60
w4 a T2 soil
w4 21.15
w5 a T1 water
w5 65.8
H
2
Wtotal w1 w2 w3 w4 w5
m kN
m kN
m kN m kN
m kN m Wtotal 198.91
kN m
- Take momen about Z - Overturning momen MH H
1 T T T 1 2 3 3
MH 75.787
kN m m
... (A.R. Mohamed, page 162)
- Restoring momen MR w1 ( a 0.5 b) w2 ( 1.5 a b) w3 ( a 0.5 b) w4 0.5 a w5 ( a 0.5 b) MR 456.914
kN m
... (A.R. Mohamed, page 163)
m
Check Safety Factor for momen overturning SF 1.5
... (A.R. Mohamed, page 163) MR
SFactual
MH
Check
SFactual 6.029 if SFactual SF
"Check SF Ok"
"Check SF Not Ok"
otherwise
Check "Check SF Ok"
Check Safety Factor for sliding Safety factore for sliding =
SF 3
Cohesion & friction angle from soil data =
cu 0.63 kg cm
2
8.7deg
... (BH-03 data)
Capacity of Shear Resistant Vall
W tan 2 total 3
SFused
Vall
H
SFsliding
"Ok"
if
"Not Ok"
cu c
SF
Vall 128.765
kN m
SFused 3.285 SFused 1.5 otherwise
... (sliding stability of foundation is not ok if
Vall V
< 1.5 )
SFsliding "Ok" Checking bearing capacity of soil stress soil on foundation per 1 m width :
soil_max
Wtotal 1m c 1m
MH 1m 1 6
soil_min
Wtotal 1m c 1m
c2 1m
1
c2 1m
"Stability Ok"
soil_max 57.971
kN 2
m
MH 1m 6
Stability_Check
soil_min 21.593
kN m
if qall soil_max
"Stability Not Ok"
otherwise
2
Stability_Check "Stability Not Ok"
To enlarge the bearing capacity we try to add the base course as the soil improvement assumption width of basecourse x = 500 mm
x 500mm y c 2 x
A_bottom y 1m
y 6m ... (take per 1 m long of foundation)
P_onbase qall A_bottom qall_top
P_onbase c 1m
Stability_Recheck
P_onbase 300 kN
qall_top 60
kN m
"Stability Ok"
2
if qall_top soil_max
"Stability Not Ok"
otherwise
Stability_Recheck "Stability Ok"
Shear Capacity of Foundation Two Ways Shear There is no shear reinforcement, therefore : Vn = Vc d T3 75mm 0.5 bar
... (effective height of foundation)
d 0.417 m qfound
W total 1m c 1m
qfound 39.782
1 3
Fc' Mpa 3
Vc1 1.387 10 kN
Vn1 shear Vc1 Vn1 1.04 103 kN
2
... (take per 1 m long of foundation)
m
Vtwo_way qfound [ c 1m [ ( b d) 1m] ] Vc1
kN
Mpa ( 1m d 2)
Vtwo_way 170.386 kN
Shear_Capacity
if Vn1 Vtwo_way
"Two Way Concrete Shear Capacity Ok"
"Two Way Concrete Shear Capacity Not Ok"
otherwise
Shear_Capacity "Two Way Concrete Shear Capacity Ok" One Ways Shear Vone qfound 1m
c 1 b d 2 2
Vone 76.899 kN Vc2
1 6
Fc' Mpa
Mpa ( 1m d)
Vc2 346.804 kN
Vn2 shear Vc2 Vn2 260.103 kN Shear_Capacity_One_Way
"One Way Concrete Shear Capacity Ok"
if Vn2 Vone
"One Way Concrete Shear Capacity Not Ok"
otherwise
Shear_Capacity_One_Way "One Way Concrete Shear Capacity Ok"
Reinforcement Footing Reinforcement qmax soil_max
kN
qmax 57.971
2
m qmin soil_min
kN
qmin 21.593
2
m qx qmax qmin
qx 36.378
kN 2
m qy
qx ( c b)
... (Wahyudi. L. page 255) quse qy qmin
quse 55.788
kN 2
m Mu
1 q x2 1 q q x2 1m use max use 2 3
Mu 7.155kN m bo 1m
... (momen per 1m width foundation)
c
qy 34.195
kN 2
m
1
0.85 if Fc' 30 Mpa
0.85 0.008 Fc' 30 Mpa
if 30Mpa Fc' 55Mpa
1 0.85
0.65 if Fc' 55 Mpa
b 0.85 1
Fc' 600 Fy 600 Fy Mpa
max 0.75 b
max 0.021
min 0.0018
... (Wahyudi. L. page 74 - 76)
assume used : Top D16-150mm, Bottom D16-150 mm
spacing 150mm 2
bar 0.25
bo T 3 75mm bar 0.5bar
Check
"Ok"
if max
"Ok"
if min
"Not Ok"
A s Fy
Check "Ok"
otherwise
spacing
0.85 Fc' bo
3.343 10 3
bo
2
A s 0.25 bar a
bo spacing
a 0.025 m
Mn momen A s Fy T 3 75mm bar 0.5bar 0.5 a Mn 162.537 kN m ratio
Mu
Mn
Check
"Ok"
ratio 0.044
if ratio 1
"Not Ok"
otherwise
Check "Ok" Wall Reinforcement Momen due to condensate pressure : Mwall H
1 T b 1 o 3
Mwall 36.587kN m
assume used : Top D16-150mm, Bottom D16-150 mm
spacing_wall 200mm
2
0.25 bar
wall
bo spacing
bo b 75mm bar 0.5bar
Check
"Ok"
if max
"Ok"
if min
"Not Ok"
wall 6.669 10 3
otherwise
Check "Ok" bo
2
bar A s_wall 0.25 awall
spacing_wall
A s_wall Fy
0.85 Fc' bo
a 0.025 m
Mnwall momen A s_wall Fy T 3 75mm bar 0.5bar 0.5 awall Mnwall 122.871 kN m ratio
Mwall
Mnwall
Check
"Ok"
if ratio 1
"Not Ok" Check "Ok"
otherwise
ratio 0.298
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