Retaining_wall_design_1A.xls

	A	C	D	E	F	H	I	J	K	L	M	N	O	Q	R	S	T	U	W	X	Y	AA	AE
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2								PROJECT TITLE:					NBT Villa							SHEET No.
3								DESCRIPTION:					Retaining Wall					MADE		DATE		Rev.
4								REF:										SR		24-févr.-26		Rev.
5								LOCATION :				Riyadh						CHECKED		DATE		0
6	DESIGN OF CANTILEVER RETAINING WALL PER ACI318-05																	ZA		25-févr.-26		0
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10																b) Geometry input							detail
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12																B	=	7,00	m
13																b1	=	1,50	m
14																Df	=	2,50	m
15																ts	=	1,50	m
16																he	=	11,10	m
17																a	=	0,00	m
18																t1	=	1,00	m				1,33
19																t2	=	0,50	m
20
21																b2	=	4,50	m
22						SECTION A-A & B-B										h	=	12,60	m
23																H	=	12,60	m
24		1)	Design Inputs
25		a)	Material
26				Concrete grade												fc	=	35	Mpa
27				Steel grade												fy	=	420	Mpa
28				Material factor												f	=	0,9
29				Conrete density												gc	=	24	kN/m3
30				Soil density												gs	=	18	kN/m3
31				Angle of repose for soil												θ	=	30	degree
32				Coefficient of active earth pressure ka =												ka	=	0,33	redian
33
34				Coefficient of passive earth pressure ka =
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36
37				Safe Bearing Capacity												fb.all	=	500	kPa
38				Coeff of friction for Sliding												m	=	0,5
39		c)	Loading
40				Surcharge pressure												q	=	12	kN/m2
41			Design Summary
42			F.S against Overturning							=	2,51 > 1.5 Safe !!
43			F.S against Sliding							=	1,33 < 1.5 Not Safe!! Hence Provide shear Key
44			Max. bearing pressure							=	372,63 kPa < 500 kPa Hence Safe
45			Wall Main reinforcement							=	16 @ 25c/c
46			Heel Top Main reinforcement							=	20 @ 75c/c
47			Toe bottom main reinforcement							=	16 @ 50c/c
48		2)	Design Output
49		2.1)	Stability Calculation
50		a)	Check for Overturning
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61																							249,8260933
62																							298,947656
63					372,63										28,77906122
64									249,8260933
65							298,947656
66			Calculation of overturning moment about "O"
67				Load mkd		Load (kN)			Distance(m)				Mo (kNm)
68					H1	476,28				4,2			2000,376
69					H2	50,4				6,3			317,52
70				Total		526,68		kN					2317,896	kNm
71
72			Calculation of Restoring Moment about "O"
73				Load mkd		Load (kN)			Distance(m)				Mro(kNm)
74					W1	899,1				4,75			4270,725
75					W2	252				3,5			882
76					W3	133,2				2,25			299,7
77					W4	66,6				1,83			122,1
78					W5	54				4,75			256,5
79				Total		1404,9		kN					5831,0	kNm
80
81				Total Overturning Moment												Mo	=	2317,9	kNm
82				Total Restoring Moment												Mro	=	5831,1	kNm
83				Factor of Safety				=	Mro/Mo			=	5831,1 / 2317,9				=	2,51	> 1.5		Safe !!
84
85
86		b)	Check for Sliding
87				Total Horizontal force												H	=	526,7	kN
88				Restoring force =				m x SW		=	0,5 x 1404,9					Hr	=	702,45	kN
89				Factor Safety			=	Hr/H		=	702,45/526,7						=	1,33	< 1.5		Not Safe!!
90
91				Hence Provide shear Key
92
93		c)	Check for Bearing pressure
94				C.g of Load					x	=	(Mro-Mo)/P						=	2,500625667
95				eccentricity					e	=	B/2 - x						=	0,9993743327
96				fbmax						=	P/A(1 + 6.e/B)						=	372,63	kPa	< 500 kPa
97				fbmin						=	P/A(1 - 6.e/B)						=	28,77906122	kPa	> 0
98																		Hence Safe
99		2.2)	Structural Design
100		a)	Design of Stem (vertical reinforcement - inner face-(1))