RRM Gravity Dam

7/29/2019 RRM Gravity Dam

1/12

w Properties of wall and backfilled soil

Height =

Base =

= Unit Weight of Wall =

Angle of wall and backfill =

=

of soil =

C of soil =

Unit Weight of soil =

Friction Between Wall and backfill =Friction Between Wall and Foundation =

Surcharge on backfill w =

According to Rankine's theory on lateral earth pressureActive pressure coefficient Ka;

Ka = (1-Sin()/(1+ sin()

By substituting values in above formulae ,

Ka =

Considering a I meter width of wall

Total lateral force on wall Pa = 1/2*Ka**H2 + ka*w

= kN

Taking moments about heel of the wall;

Total area of the wall = m2

Horizontal distance to centroid from heel = m

Force per m (kN) Arm Moment per m (kNm)

PaCos(+90-(180-)) =Rh =

PaSin(+90-(180-)) =Weight of wall =

Tab.3.10 Rv = Total M

Lever arm of the base resultant from heel = Total M/Rv

= m

Distance to middle third of base from heel

Minimum = m

Maximum = m

Base resultant is not within the middle third. (Section fails)

Dirn.

Hor.

0.900

122.72

Ver. 40.97 0.24 10.01

50.18

1.119

0.450

2.925

0.730

68.74 0.73

54.37 1.15

109.71

25

25

0.6355

68.0758

0

54.37

62.52

23.5

102

35

0

18

Reference Calculation Output

3.45

1.35

0


2/12

Eccntricity of the base = m

Pressure distribution of the base is given by Rv/B *(16e/B)

Pressure near the heel of the section = kN/m2Pressure near the toe of the section = kN/m3

Factor of safety against overturning =

Factor of safety against sliding = Rv * Tan()/Rh= 0.94

0.444

0.00316.04

1.41


CENTRAL ENGINEERING CONSULTANCY BUREAU (CECB) Job Code Page

D

E

C

DESIGN UNIT Designed Date

EPC DIVISION Checked Date

Doc. No.


3/12


D

E

C


EPC DIVISION Checked Date

Doc. No.


4/12

2664

#DIV/0!

6210.1

7.428571429

1926

5.8

1.15 21

288.80231 25.305

2409

5.71

#REF!

1.306

1.55


5/12

250


6/12


7/12

w Properties of wall and backfilled soil

Height =

Base =

= Unit Weight of Wall =

Angle of wall and backfill =

=

of soil =

C of soil =

Unit Weight of soil =

Friction Between Wall and backfill =Friction Between Wall and Foundation =

Surcharge on backfill w = kN/m2

According to Coulomb's theory on lateral earth pressure

Active pressure coefficient Ka;

Ka = (Sin(-)/sin()/([sin(+)] + [sin(+)sin(-/sin(-)])2

By substituting values in above formulae ,

Ka =

Considering a I meter width of wall

Total lateral force on wall Pa = 1/2*Ka**H2 + ka*w

= kN

Taking moments about heel of the wall;

Total area of the wall = m2

Horizontal distance to centroid from heel = m

Force per m (kN) Arm Moment per m (kNm)

PaCos(+90-(180-)) =Rh =

PaSin(+90-(180-)) =Weight of wall =

Tab.3.10 Rv = Total M

Lever arm of the base resultant from heel = Total M/Rv

= m

Distance to middle third of base from heel

Minimum = m

Maximum = m

Base resultant is not within the middle third. (Section fails)

Output

3.45

1.2

3023.5

102

Reference Calculation

25

25

0.64104

68.6702

0

35

0

18

54.84

1.121

0.400

2.925

0.730

68.74 0.73

54.84 1.15

110.06 123.35

Ver. 41.33 0.24 10.10

63.07

Dirn.

Hor.

0.800

50.18


8/12

Eccntricity of the base = m

Pressure distribution of the base is given by Rv/B *(16e/B)

Pressure near the heel of the section = kN/m2Pressure near the toe of the section = kN/m3

Factor of safety against overturning =

Factor of safety against sliding = Rv * Tan()/Rh=

Doc. No.

D

E

C


EPC DIVISION

Page

Checked Date


CENTRAL ENGINEERING CONSULTANCY BUREAU (CECB) Job Code

0.94

0.521

0.00925.31

1.14


9/12

Doc. No.

D

E

C


EPC DIVISION


Checked Date


10/12

2664

#DIV/0!

6210.1

7.428571429

1926

5.8

1.15 21

288.80231 25.305

2409

5.71

#REF!

1.306

1.55


11/12

250


12/12

Documents

RRM Gravity Dam