DESIGN OF BOX ( UNDER CANAL )
Width of Box = 1.800 mts.
Height of Box including wc = 1.275 mts.
Height of Box = 1.200 m
Thickness of sealing coat = 0.100 mts.
Thickness of w.c = 0.075 mts.
Thickness of Hor. Mem(top) = 0.300 mts.
Thickness of Hor. Mem(bottom) = 0.300 mts.
Thickness of Ver.(end) Mem = 0.300 mts.
Thickness of Middle Mem = 0.300 mts.
F S L of canal = 500.926 M
Tail water level of drain = 496.676 M from TEL'S
Live Load Surcharge = 0.000 M 496.679
Avg. Ground Level/TBL = 501.676 M
Canal bed level = 498.676 M
Height of earth over box = 1.900 mts.
Top level of box = 496.676 M
Sill level = 495.176 M
Haunch size = 0.150 x 0.15 m
Density of RCC = 2.500
Density of earth = 2.100
Density of concrete = 2.400
Density of water = 1.000
Coeft. = 0.361
F.S.L 500.926
496.676
498.676
496.676
0.3
496.376
1.275
495.176
0.300
1.800 1.800
0.30 0.30
4.500
Loads on RCC box per mt.
Wt. of top member = 4.500 x 0.300 x 2.500 = 3.375 t
Wt. of bottom member = 4.500 x 0.300 x 2.500 = 3.375 t
Wt. of vertical walls ( end ) =2x 1.275 x 0.300 x 2.500 = 1.913 t
Wt. of vertical walls (middle ) =1x 1.275 x 0.300 x 2.500 = 0.956 t
Wt. of sealing coat = 4.500 x 0.100 x 2.400 = 1.080 t
Wt. of water in box =2x 1.800 x 1.200 x 1.000 = 4.320 t
Wt. of Haunches (4 per vent0 = 0.5 x 0.150 x 0.150 x 2.500 = 0.113 t
Wt. of wc =2x 1.800 x 0.075 x 2.400 = 0.648 t
Wt. of earth over the box = 4.500 x 1.900 x 2.100 = 17.955 t
Wt. of water over the box = 4.500 x 2.250 x 1.000 = 10.125
TOTAL 43.859
CASE 1 BOX EMPTY & CANAL EMPTY
Total wt. of box(without water) = 43.859 - 4.320 - 10.125 = 29.414 t
net upward soil reaction B = 29.414 - 3.375 - 0.648 = 5.643 t/m2
4.500
load on top of slab A = 3.375 + 1.080 + 17.955 = 4.980 t/m2
4.500
water pressure C = = 0
water load D = = 0
earth pr. At top E = 0.361 x 2.100 x 2.05 = 1.554 t/m2
earth pr. At bottom F = 0.361 x 2.100 x 3.625 = 2.748 t/m2
CASE 2 BOX FULL & CANAL EMPTY
Total wt. of box = 43.859 - 10.125 = 33.734 t
net upward soil reaction B = 33.734 - 3.375 - 0.648 = 6.603 t/m2
4.500
load on top of slab A = 3.375 + 1.080 + 17.955 = 4.980 t/m2
4.500
water pressure C = 0 TO 1.200 t/m2
water load D = = 1.200 t/m2
earth pr. At top E = 0.361 x 2.100 x 2.050 = 1.554 t/m2
earth pr. At bottom F = 0.361 x 2.100 x 3.625 = 2.748 t/m2
upward thrust on top slab G = 0.300 x 1.000 = 0.300 t/m3
CASE 3 BOX EMPTY & CANAL FULL
Total wt. of box(without water) = 43.859 - 4.320 = 39.539 t
net upward soil reaction B = 39.539 - 3.375 - 0.648 = 7.893 t/m2
4.500
load on top of slab A = 10.125 + 17.955 + 1.080 + 3.375 = 7.230 t/m2
4.500
water pressure C = = 0
water load D = = 0
earth pr. At top E = 0.361 x 1.100 x 0.15 = 0.060 t/m2
earth pr. At bottom F = 0.361 x 1.100 x 1.725 = 0.685 t/m2
water pr. At top H = 4.400 x 1.000 = 4.400 t/m2
water pr. At bottom J = 5.975 x 1.000 = 5.975 t/m2
CASE 4 BOX FULL & CANAL FULL
Total wt. of box = = 43.859 t
net upward soil reaction B = 43.859 - 3.375 - 0.648 = 8.853 t/m2
4.500
load on top of slab A = 10.125 + 17.955 + 1.080 + 3.375 = 7.230 t/m2
4.500
water pressure C = 0 TO 1.200 t/m2
water load D = 1.200 t/m2
earth pr. At top E = 0.361 x 1.100 x 0.150 = 0.060 t/m2
earth pr. At bottom F = 0.361 x 1.100 x 1.725 = 0.685 t/m2
water pr. At top H = 4.400 x 1.000 = 4.400 t/m2
water pr. At bottom J = 5.975 x 1.000 = 5.975 t/m2
upward thrust on top slab G = 0.300 x 1.000 = 0.300 t/m3
A
H
E EH E H
E 3 4 B E
B B
B B B
B G B
G
C C C
B B B
B D B B
J B
F B J
1 2 E
B B
B FH B
F
E B
B B B
B B B
NODES
1 ( 0.000 0.000 )
2 ( 2.100 0.000 )
3 ( 4.200 0.000
4 ( 0.000 1.575 )
5 ( 2.100 1.575 )
6 ( 4.200 1.575 )
STAAD SPACE UT AT KM 14.751 UNDER CANAL
START JOB INFORMATION
ENGINEER DATE 10/10/2014
END JOB INFORMATION
INPUT WIDTH 79
UNIT METER MTON
JOINT COORDINATES
1 0.000 0.000
2 2.100 0.000
3 4.200 1.000
4 0.000 1.575
5 2.100 1.575
6 4.200 1.575
MEMBER INCIDENCES
1 1 2; 2 2 3;3 4 5;4 5 6;5 1 4;6 2 5;7 3 6;
MEMBER PROPERTY INDIAN
1 TO 4 PRIS YD 0.3 ZD 1
5 TO 7 PRIS YD 0.3 ZD 1
6 PRIS YD 0.3 ZD 1
CONSTANTS
E CONCRETE ALL
POISSON CONCRETE ALL
DENSITY CONCRETE ALL
SUPPORTS
1 2 3 PINNED
LOAD 1 BOX EMPTY & CANAL EMPTY
MEMBER LOAD
1 UNI GY 5.643
2 UNI GY -4.980
3 LIN Y -2.748 -1.554
4 LIN Y 2.748 1.554
LOAD 2 BOX FULL & CANAL EMPTY
MEMBER LOAD
1 UNI GY 6.603
1 UNI GY -1.200
2 UNI GY -4.980
2 UNI GY 0.300
3 LIN Y -2.748 -1.554
3 LIN Y 1.200 0.000
4 LIN Y 2.748 1.554
4 LIN Y -1.200 0.000
LOAD 3 BOX EMPTY & CANAL FULL
MEMBER LOAD
1 UNI GY 7.893
2 UNI GY -7.230
3 LIN Y -0.685 -0.060
3 LIN Y -5.975 -4.400
4 LIN Y 0.685 0.060
4 LIN Y 5.975 4.400
LOAD 4 BOX FULL & CANAL FULL
MEMBER LOAD
1 UNI GY 8.853
1 UNI GY -1.200
2 UNI GY -7.230
2 UNI GY 0.300
3 LIN Y -0.685 -0.060
3 LIN Y -5.975 -4.400
3 LIN Y 1.200 0.000
4 LIN Y 0.685 0.060
4 LIN Y 5.975 4.400
4 LIN Y -1.200 0.000
PERFORM ANALYSIS
PRINT ANALYSIS RESULT
FINISH
