Week 11 Challenge

Aim:- Design the pile foundation in the abutment bridge. considering the 28-meter span. Vertical capacity-250 tonne horizontal capacity - 40 tonnes.

With abutment having backfill

With abutment having RE wall.

Also List different components of pile foundation and calculate steel quantity in pile. Design of pile cap.

Solution:-

Given Data and Assumption.

Span and Cross section							Unit
1	C/c of exp joint				=	28.00	m
2	C/c of bearing				=	27.20	m
3	Dist. Of bearing to exp joint				=	0.40	m
4	Total Deck width				=	12.00	m
5	Carriage width				=	8.50	m
6	Footpath width (One Side)				=	1.50	m
7	Width of Crashbarrier ( Right Side)				=	0.50	m
8	Width of Crashbarrier ( Left Side)				=	0.50	m

Superstructure Details
1	No fo girder				=	4
2	Spacing of girder				=	3	m
3	Cantilever on both sides				=	1.5	m
4	Depth od superstructure				=	4.2	m
5	Wearing coat thickness				=	0.065	m
6	Dist. of FRL from bearing of least height				=	10.9	m
7	Bearing thickness				=	0.065	m
8	Pedestal thickness				=	0.25	m
9	Bearing + pedestal thckness				=	0.315	m

REFER ATTACHED SHEET FOR DETAILS

Que ) Component of pile foundation and Calculate Steel quantity in Kg /cums and detailing in pile foundation.

1. Componenet in Pile foundation

• Pile Shaft (PIles)
• Pile Cap

2. Calculating steel quantity.

Assumption Data,

• Diameter of bar = 25. m
• Lenght of pile = 20 M
• No of Bar = 24 nos

The formula is :

Weight of Steel Bar = [D2 L / 162.28]

=`(25xx25xx20)/162.8`

= 76.79 Kg for single bar.

For 24 nos of bar = 24 x 76.79

= 1842.75 kg. Total

3. Detailing in pile foundation.

REFER ATTACHED SHEET FOR DETAILS