Soil Bearing Capacity Calculation (www.theengineeringcommunity.org).xlsx

	A	B	C	D	E	F	G	H	J	L	M	O	P	Q	R	S
1	FOUNDATION DESIGN					Subject:
2						SOIL BEARING CAPACITY BY TERZAGHI
3						Design Code/Ref:		Proj. No.	Location:	Designer:	Date:
4											27-mai-26
5	CODE REF.	dsf
6
7		Compute the allowable bearing pressure using Terzaghi equation for the footing and soil parameters shown in
8		Figure 1.										Table 4-2
9												Bearing-capacity factors for the Terzaghi Equations
10			D =	0	footing embedment depth							Values of Ng for f of 0, 34 and 48o are original
11			g =	18	soil density							Terzagui values and used to back-compute Kpg.
12			Ø =	31 deg	angle of internal friction							f, deg	Nc	Nq	Ng	Kpg
13			c =	0 kPa	cohesion of soil							0	5,7	1,0	0,0	10,8
14			B =	2	footing size							5	7,3	1,6	0,5	12,2
15												10	9,6	2,7	1,2	14,7
16			Footing Type:	square								15	12,9	4,4	2,5	18,6
17												20	17,7	7,4	5,0	25,0
18												25	25,1	12,7	9,7	35
19												30	37,2	22,5	19,7	52
20		1.0 Find the bearing capacity. Note that this value is usually the result of geotechnical investigation.										34	56,2	36,5	36,0
21												35	57,8	41,4	42,4	82
22			Since:									40	95,7	81,3	100,4	141
23			Ø =	31 deg								45	172,3	173,3	297,5	298
24			Therefore from Table 4-2:				From Table 4-1					48	258,3	287,9	780,1
25			Nc =	37,2			sc =	1,3				50	347,5	415,1	1153,2	800
26			Nq =	22,5			sγ =	0,8
27			Nγ =	19,7
28												Table 4-1
29			q =	0								For:	sc	sg
30												strip	1,0	1,0
31												round	1,3	0,6
32			qult =	( 0,0	+ 141,84 B )	kPa						square	1,3	0,8
33			qult =	283,7 kPa
34
35	Eq. 4-1
36
37			SF =	3	Factor of Safety
38
39			qa =	94,6 kPa	allowable bearing capacity
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