Box-culvert Design (Longitudinal Section) (www.theengineeringcommunity.org).xlsx

	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q
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2	Project ref:	C4124	Checking of 8m span of Box Drain in Longitudinal Direction
3	Project Title:	Nicoll Highway Station									Uniform LL =
4											25	kN/m2
5	Property of the Box Culvert
6	Section Area A =		m2							600	mm
7												Top Slab thickness
8	Section Modulus										T =	250	mm
9	I =	4722333333333	mm4		Internal Depth									Lever Arm Z
10	S =	3,63256E+09	mm3	D =	2	m					Wall thickness				2.5	m
11								Internal width			t =	250	mm
12	(1)-- Design Moment						B =	5	m
13	Moment coeff. =	0,11	(at first interior support)
14	Moment coeff. =	0,08	(at interior support)
15	Moment coeff. =	0,07	(at middle interior span)
16	M =	14902	kN.m	(at interior support)								Base Slab thickness
17	Pile support distance										b =	350	mm
18	Spacing =	21	m
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20	Compression stress
21	s =	4,102	N/mm2
22
23	Simplified Approach: M = F * Z
24	Lever arm Z =	2.5	m
25	Tension/Comp F =	0	kN
26	Tension reinf't req	1	mm2	Yield strength =		460	mm2
27	reinforcement at Base slab =		T	1	@	150	mmc/c
28	Equivalent reinf't area over base slab =			29	mm2	Longi reinf't OK
29
30	Design Forces
31	Design LL =	25	kN/m2	=	137,5	kN/m
32	Earth weight DL=	12	kN/m2	=	66	kN/m
33	Self weight SW=	0	kN/m	=	0	kN/m
34	Water Weight WL=	2	m height	=	110	kN/m
35	Service Load = 1.0*(DL+SW+WL+LL)			=	313,5	kN/m
36	Ultimate Load qult = 1.4(DL+SW)+1.0WL+1.6*LL =				422,4	kN/m
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38	(3) Shear force check
39	Shear coeff. =	0,55	(at interior support)
40	Shear foce @ av from supportface			=	-5189158	kN/side wall
41	shear stress =	-8302,652	N/mm2
42	Shear resist. vcmin=	0,4	N/mm2			Shear OK
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