2017-02-21_REVISION - M1988112 ‎(2)‎

• Permit No: M1988112
• IBM Index Class Name: Revision
• Doc Date: 2/21/2017
• Doc Name: Request for Technical Revision
• From: Battle Mountain Resources, Inc.
• To: DRMS
• Type & Sequence: TR34
• Email Name: WHE
• Media Type: D
• Archive: No

Use menu item Settings > Printing & Title Block Title San Luis Drop Structure Page: 9 Of 10
to set these five lines of information Job # 11061:7 Dsgnr: LCB Date: 18 DEC 2015
for your program. Description....
Tall Energy Dissipator Wall
This Wall in File: P:\110617 San Luis Tailings Impoundment Drop Structure\2.0 Engineering
License:
Cantilevered Retaining Wall Design License : KW -06060875 9 g Code: IBC 2012,AC1 318-11,ACI 530-11
License To : Engineering
Analytics
Footing Dimensions & Strengths
Toe Width
= 15.00 ft
Heel Width
= 1.30
Total Footing Width
= 16.30
Footing Thickness
= 17.00 in
Key Width
= 0.00 in
Key Depth
= 0.00 in
Key Distance from Toe
= 0.00 ft
fc = 2,500 psi Fy = 60,000 psi
Footing Concrete Density = 150.00 pcf
Min. As % = 0.0018
Cover @ Top 2.00 @ Btm = 3.00 in
Footing Design Results
LOg
H2r
Factored Pressure = 1,391
0 psf
Mu': Upward = 104,349
0 ft-#
Mu': Downward = 28,688
4 ft-#
Mu: Design = 75,661
4 ft-#
Actual 1 -Way Shear = 31.44
0.81 psi
Allow 1 -Way Shear = 75.00
75.00 psi
Toe Reinforcing = # 8 @ 6.00 in
97.5 16.28
Heel Reinforcing = # 5 @ 12.00 in
Surcharge over Heel = 1,067.1 8.21 8,759.0
Key Reinforcing = None Spec'd
Other Acceptable Sizes & Spacings
Surcharge Over Toe =
Toe: #4@ 1.88 in, #5@ 2.92 in, #6@
4.14 in, #7@ 5.64 in, #8@ 7.43 in, #9@ 9.41 i
Heel: Not req'd: Mu < phi*5*lambda*sgrt(fc)*Sm
Key: No key defined
Adjacent Footing Load =
Summary of Overturning & Resisting Forces & Moments
.....OVERTURNING.....
.....RESISTING.....
Force Distance Moment
Force Distance
Moment
Item lbs ft ft-#
lbs ft
ft-#
Heel Active Pressure = 8,759.0 5.47 47,931.1
Soil Over Heel =
97.5 16.28
1,586.8
Surcharge over Heel = 1,067.1 8.21 8,759.0
Sloped Soil Over Heel =
Surcharge Over Toe =
Surcharge Over Heel =
6.5 16.28
105.8
Adjacent Footing Load =
Adjacent Footing Load =
Added Lateral Load =
Axial Dead Load on Stem =
Load @ Stem Above Soil =
* Axial Live Load on Stem =
=
Soil Over Toe =
Surcharge Over Toe =
Total 9,826.1 O.T.M. 56,690.0
Stem Weight(s) =
3,332.5 15.54
51,799.1
Earth @ Stem Transitions=
292.5 16.13
4,716.6
=
Footing Weighl =
3,463.8 8.15
28,229.6
Resisting/Overturning Ratio = 1.52
Key Weight =
Vertical Loads used for Soil Pressure = 7,192.8 lbs
Vert. Component =
Total =
7,192.8 lbs R.M.=
86,437.8
* Axial live load NOT included in total displayed, or used for
overturning
resistance, but is included for
soil pressure calculation.
Vertical component of active lateral soil pressure IS NOT considered in
the calculation of Sliding Resistance.
Vertical component of active lateral soil pressure IS NOT considered in
the calculation of Overturning Resistance.
Tilt
Horizontal Deflection at Top of Wall due to settlement of soil
(Deflection due to wall bending not considered)
Soil Spring Reaction Modulus 250.0
pci
Horizontal Defl @ Top of Wall (approximate only) 0.040
in
The above calculation is not valid if the heel soil bearing pressure exceeds that of the toe
because the wall would then tend to rotate into the retained soil