CHECK STABILITY OF DAM FOR GIVEN SECTION TOP WIDTH 7.5 M HEIGHT OF DAM – 75 M HEIGHT OF W.L. – 72 M BATTER IS STARTING AT 45 M PROJECTION FROM U.S 4.5 M D/S PORTION LENGTH – 43.75 M D/S SLOPE STARTED AT 12.5 M FROM TOP D/S SLOPE 0.7 (H):1(V) DRAINAGE GALLERY @ 48.7 5 M FROM TOE OF DAM F Ф = 1.2 FC = 2.4 μ=0.7 SHEAR STRENGTH OF CONCRETE = c = 1400 KN/M^2 ΣV = Weight of dam (W1+W2+W3) + Vertical forces of water (P1+P2) – Uplift Forces (U1 + U2 +U3) – Vertical Acceleration of E.Q. Moment of Weight Of Dam (w1 + w2 + w3) + Moment of Weight of water (p1 + p2) - Moment of water pressure (p) - Moment of Uplift Forces (U) - Moment of Inertia force (vertical acceleration moment + Hori Acce.) - Moment Hydrodynemic Pressure

1. CHECK STABILITY OF DAM
FOR GIVEN SECTION
TOP WIDTH 7.5 M
HEIGHT OF DAM – 75 M
HEIGHT OF W.L. – 72 M
BATTER IS STARTING AT 45 M
PROJECTION FROM U.S 4.5 M
D/S PORTION LENGTH – 43.75 M
D/S SLOPE STARTED AT 12.5 M FROM TOP
D/S SLOPE 0.7 (H):1(V)
DRAINAGE GALLERY @ 48.75 M FROM
TOE OF DAM2/12/2014 1
PREPARED BY V.H.KHOKHANI
ASSISTANT PROFESSOR, DIET

2. F Ф = 1.2
FC = 2.4
μ=0.7
SHEAR STRENGTH OF CONCRETE = c
= 1400 KN/M^2
2/12/2014 2
PREPARED BY V.H.KHOKHANI
ASSISTANT PROFESSOR, DIET

3. 2/12/2014 3
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ASSISTANT PROFESSOR, DIET

4. w
1
w2
w3
4.5 7.5 43.75
45
72
12.5
P1
P2
10(72)
72/3
2/12/2014 4
PREPARED BY V.H.KHOKHANI
ASSISTANT PROFESSOR, DIET

5. u2 u1
u3
10(72)
720/3
4.5 7.5 43.75
48.75
2/12/2014 5
PREPARED BY V.H.KHOKHANI
ASSISTANT PROFESSOR, DIET

6. Name of
Force
Designati
on
Magnitud
e of Force
(kN)
Lever arm
(m)
Moment
about toe
(kN-m)
Weight of
dam
W1 75x7.5x1x24 43.75+7.5/2
W2 1/2x43.75x
62.5x24
2/3 x 43.75
W3 0.5x4.5x45x
24
43.75+7.5+(
4.5/3)
Weight of
water
p1 0.5 x 10 x
4.5 x 45
43.75 + 7.5
+ 2/3(4.5)
p2 27 x 4.5 x
10
43.75 + 7.5
+ 4.5/2
Water
pressure
P 0.5
*10*72^2
72/3
2/12/2014 6
PREPARED BY V.H.KHOKHANI
ASSISTANT PROFESSOR, DIET

7. TYPE OF
FORCE
DESIGN
ATION
MEGNIT
UDE
LEVER
ARM
MOMEN
T
UPLIFT
FORCE
U1 0.5 x
43.75 x
(706.3/3)
(2/3)
48.75
U2 7 x
(706.32/3
)
48.75 +
3.5
U3 0.5 x 7 x
(706.3 –
706.3/3)
48.75 +
(2/3)7
2/12/2014 7
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ASSISTANT PROFESSOR, DIET

8. 2/12/2014 8
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ASSISTANT PROFESSOR, DIET

9. 2/12/2014 9
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ASSISTANT PROFESSOR, DIET

10. w1
w2
w3
4.5 7.5 43.75
45
75
12.5
45/3
10
PREPARED BY V.H.KHOKHANI
ASSISTANT PROFESSOR, DIET
75
/2
75
θ1

11. 5
Types
of
force
Designation Megnitude Lever
arm
Moment
Inertia
force
due to
earth
quake
Vertical
acceleration
0.08 x W 35.42
Horizontal
acceleration
αhW1
= 0.1 x
75/2
αhW2
=
62.5/3
αhW3 45/3
Hydrod
ynemic
force2/12/2014 11
PREPARED BY V.H.KHOKHANI
ASSISTANT PROFESSOR, DIET

12. ΣV =
Weight of dam
(W1+W2+W3)
+
Vertical forces of water
(P1+P2)
–
Uplift Forces
(U1 + U2 +U3)
–
Vertical Acceleration of E.Q.
2/12/2014
PREPARED BY V.H.KHOKHANI
ASSISTANT PROFESSOR, DIET
12

13. ΣM =
Moment of Weight Of Dam
(w1 + w2 + w3)
+
Moment of Weight of water
(p1 + p2)
-
Moment of water pressure
(p)
-
Moment of Uplift Forces
(U)
-
Moment of Inertia force
(vertical acceleration moment + Hori Acce.)
-
Moment Hydrodynemic Pressure
2/12/2014
PREPARED BY V.H.KHOKHANI
ASSISTANT PROFESSOR, DIET
13

14. 2/12/2014 14
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ASSISTANT PROFESSOR, DIET

15. 2/12/2014
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ASSISTANT PROFESSOR, DIET
15

16. 2/12/2014 16
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ASSISTANT PROFESSOR, DIET

17. GREATER THAN 1
GREATER THAN 4 greater of 1
GREATER THAN 1.5
2/12/2014 17
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ASSISTANT PROFESSOR, DIET