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Full description
Design and analysis of Thrust Block for pipelines Geo tecnical stability check for Anchor Blocks
Thrust blocks for horizontal elbows designed for 90, 60, 45, 30 22.5, and 11.25 degrees angle of bend.
Deskripsi lengkap
Project :
Date : 11/26/2011
logo Page No. :
-
/
Description :
THRUST BLOCK
Checked by :
Designed by :
Drawing No. : /
HORIZONTAL BENDS
gs = m = f = gc =
Compressive strenght of concrete;
f'c =
Concrete Elastic Modulus
Ec =
Yield strenght of steel;
fy = Es =
Elastic Modulus of steel Width of the block ; Height of the block ; Max. Length block of the per direction ; Depth of the earth cover; Height from top of the block to NGL ;
H1 = H2 =
Height from top of pipe to NGL ; Total length of the block ;
H3 = l =
1.) Determine design presure ; d d = design (total) pressure = [HGL 26.13 m
2.) Determine Thrust force; R (Horizontal bend) AS PER AWWA M 45 7.1 where d= Design (total) pressure A = Area of the Nominal area of the pipe P = 2dA sin ( q ) = 2 x 346.225 kN x[( 1.22 m)2x( p )] x sin 45 2 4 2 m2 P = 312.263 kN m ***Assume block size to be; 2 m B = H =
2
m
L
=
1.58 m
= 2.125 m
l
3.) Weight of soil on the block; W 1 W 1 = gs X h1 X 2L 18.00 kN X = W1 =
B 1.79 m
X
X
2(
1.58 m)
X
2
m
203.213 kN
4.) Weight of water and pipe in the block;
W2
W 2 = gw = W2 =
2AL + Wr 9.81 kN X 2( m3 38.838 kN
1.13 m2 ) x(
1.58 m) +
(
124.46
kg X 9.81 m m sec2 1000
)
X 1.58 m x
2 m
Project :
Date : 11/26/2011
logo Page No. :
-
/
Description :
THRUST BLOCK
Checked by :
Designed by :
Drawing No. : /
HORIZONTAL BENDS
5.) Weight of block; W 3 23.54 kN [( = m3 W3 =
m)x(
2
2
m) -
( p )( 4
2 1.22 m) ]
2 x
1.58 m
209.459 kN
6.) Total weight ; W W = W1 + W2 + W3 = 203.213 kN + m W = 451.510 kN
38.838 kN + 209.459 kN m m
7.)Friction force ; F F F
= mW = 0.5 = 225.755 kN
x
451.510 kN m
8.) Passive Pressure earth pressure at the back of the block ; E E