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PROJECT: Date Page LOCATION 2014 9 Revision Job No DESIGN TO BS 8110-1997, BS 8002-1994 and BS 8004-1986 (A) DESIGN PARAMETER Refer to the sketch drawings attached Assumed angle of internal friction = 30 o Assumed safe bearing capacity = 150 KN/m 2 Density of retained soil = 20 KN/m 3 Surcharge load = 10 KN/m 2 (B) ACTIVE PRESSURE CALCULATION Active pressure coefficient, Ka = = 0.33 Surcharge pressure, Ps = 0.33 x 10 = 3.3 KN/m 2 Active earth pressure - bulk soil, P b = 0.33 x 20 x 0.6 = 3.96 KN/m 2 Active earth pressure - submerged soil, P sm = 0.33 x [ 20-10 ] x 2.177 = 7.1841 KN/m 2 Active water pressure, Pw = 10 x 2.177 = 21.77 KN/m 2 Using the maximum walll height of 1.877m Height of active earth pressure = 1.877 + 0.3 = 2.177 m Height of pore water pressure = 1.877 + 0.3 - 0.6 = 1.577 m Height of retained water = 1.877 - 0.15 = 1.727 m (C) HORIZONTAL LOAD CALCULATION factors surcharge load 1.4 Active pressure - bulk soil 1.4 Active pressure - bulk soil 1.4 Active pressure - submerged soil 1.4 water pressure 1.4 TOTAL (D) REINFORCEMENT DESIGN FOR WALL = 46.61 KNm the effective depth (mm), d = 154 mm K = M = 0.079 < 0.156 b w d 2 f cu HENCE NO COMPRESSION REINFORCEMENT REQUIRED lever arm Z(mm) = 139 mm Area of reinforcement requi A s = = 768 mm 2 Bar diameter, Ø = 12 mm H12 @ 125 C/C (A S PROVIDED = = 905 mm ) Distribution bars = 0.25%bh = 500 mm 2 provide H12 @ 200 C/C A S PROVIDED = 565 mm ) 46.61 Moment M 10.95 33.18 1.09 1.78 0.79 0.53 0.53 23.70 10.06 1.66 moment about toe (KNm) 10.95 2.96 9.52 5.75 17.44 Lever arm (m) Unfactored Force (KN) 7.18 1.19 8.62 7.82 factored Force (KN) 12.07 PROPOSED RECREATIONAL FACILITY DESIGNED BY PROPOSED SWIMMING POOL P. Amankwah CHECKED BY Richard Ofori Addo 30 sin 1 30 sin 1 z f M y 95 . 0

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Page 1: Document1

PROJECT: Date Page

LOCATION 2014 9

Revision Job NoDESIGN TO BS 8110-1997, BS 8002-1994 and BS 8004-1986

(A) DESIGN PARAMETERRefer to the sketch drawings attachedAssumed angle of internal friction = 30 o

Assumed safe bearing capacity = 150 KN/m2

Density of retained soil = 20 KN/m3

Surcharge load = 10 KN/m2

(B) ACTIVE PRESSURE CALCULATIONActive pressure coefficient, Ka = = 0.33

Surcharge pressure, Ps = 0.33 x 10 = 3.3 KN/m2

Active earth pressure - bulk soil, Pb = 0.33 x 20 x 0.6 = 3.96 KN/m2

Active earth pressure - submerged soil, Psm = 0.33 x [ 20-10 ] x 2.177 = 7.1841 KN/m2

Active water pressure, Pw = 10 x 2.177 = 21.77 KN/m2

Using the maximum walll height of 1.877m

Height of active earth pressure = 1.877 + 0.3 = 2.177 mHeight of pore water pressure = 1.877 + 0.3 - 0.6 = 1.577 mHeight of retained water = 1.877 - 0.15 = 1.727 m

(C) HORIZONTAL LOAD CALCULATION factors

surcharge load 1.4Active pressure - bulk soil 1.4

Active pressure - bulk soil 1.4

Active pressure - submerged soil 1.4water pressure 1.4

TOTAL

(D) REINFORCEMENT DESIGN FOR WALL

= 46.61 KNmthe effective depth (mm), d = 154 mm

K = M = 0.079 < 0.156

bwd2fcu

HENCE NO COMPRESSION REINFORCEMENT REQUIRED

lever arm Z(mm) = 139 mm

Area of reinforcement requiAs = = 768 mm2

Bar diameter, Ø = 12 mm

H12 @ 125 C/C (AS PROVIDED = = 905 mm2)

Distribution bars = 0.25%bh = 500 mm2

provide H12 @ 200 C/C AS PROVIDED = 565 mm2)

46.61

Moment M

10.9533.18

1.091.78

0.79

0.530.5323.70

10.061.66

moment about toe (KNm)

10.952.96

9.52

5.7517.44

Lever arm (m)Unfactored Force

(KN)7.181.19

8.62

7.82

factored Force(KN)

12.07

PROPOSED RECREATIONAL FACILITY DESIGNED BY

PROPOSED SWIMMING POOL P. Amankwah

CHECKED BYRichard Ofori Addo

30sin130sin1

zfM

y95.0