2009-03-17_REPORT - M2008078 ‎(2)‎

• Permit No: M2008078
• IBM Index Class Name: REPORT
• Doc Date: 3/17/2009
• Doc Name: Slope Stability Report- Appendix C
• From: J&T Consulting, Inc.
• To: DRMS
• Email Name: MAC
• Media Type: D
• Archive: No

GP-DV-Edited.OPT
Factors of safety have been calculated by the
* * * * * SIMPLIFIED BISHOP METHOD * * *
The most critical circular failure surface
is specified by 18 coordinate points
Point x-surf y-surf
No. (ft) (ft)
1 234.71 203.18
2 242.70 203.01
3 250.69 203.48
4 258.61 204.62
5 266.41 206.39
6 274.04 208.80
7 281.44 211.82
8 288.58 215.45
9 295.39 219.64
10 301.84 224.37
11 307.88 229.62
12 313.46 235.35
13 318.56 241.51
14 323.14 248.07
15 327.17 254.99
16 330.62 262.20
17 333.46 269.68
18 334.71 274.00
**** Simplified BISHOP FOS = 1.274 ****
********************************************************************
** **
** Out of the 9000 surfaces generated and analyzed by XSTABL, **
** 551 surfaces were found to have MISLEADING FOS values. **
** **
********************************************************************
The following is a summary of the TEN most critical surfaces
Problem Description : West Farm - Case D - VERTICAL
FOS Circle Center Radius Initial Terminal Resisting
(BISHOP) x-coord y-coord x-coord x-coord Moment
(ft) (ft) (ft) (ft) (ft) (ft-lb)
1. 1.274 240.86 300.62 97.63 234.71 334.71 2.918E+07
2. 1.276 240.43 301.63 98.57 234.71 334.97 2.956E+07
3. 1.280 241.00 300.75 97.69 234.71 334.87 2.929E+07
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