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XSTABL File: NEWKEL7 1-03-12 11:39

******************************************

* X S T A B L *

* *

* Slope Stability Analysis *

* using the ** Method of Slices *

* *

* Copyright (C) 1992 - 99 *

* Interactive Software Designs, Inc. *

* Moscow, ID 83843, U.S.A. *

* *

* All Rights Reserved *

* *

* Ver. 5.203 96 - 1999 *

******************************************

Problem Description : tugasy

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SEGMENT BOUNDARY COORDINATES

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5 SURFACE boundary segments

Segment x-left y-left x-right y-right Soil Unit

No. (m) (m) (m) (m) Below Segment

1 .0 20.0 20.0 20.0 2

2 20.0 20.0 30.0 25.0 1

3 30.0 25.0 95.0 25.0 1

4 95.0 25.0 105.0 20.0 2

5 105.0 20.0 125.0 20.0 2

6 SUBSURFACE boundary segments

Segment x-left y-left x-right y-right Soil Unit

No. (m) (m) (m) (m) Below Segment

1 20.0 20.0 125.0 20.0 22 .0 17.5 125.0 17.5 3

3 .0 15.0 125.0 15.0 4

4 .0 12.5 125.0 12.5 5

5 .0 10.0 125.0 10.0 6

6 .0 7.5 125.0 7.5 7

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ISOTROPIC Soil Parameters

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7 Soil unit(s) specified

Soil Unit Weight Cohesion Friction Pore Pressure Water

Unit Moist Sat. Intercept Angle Parameter Constant SurfaceNo. (kN/m3) (kN/m3) (kPa) (deg) Ru (kPa) No.

1 19.6 19.6 .0 25.00 .000 .0 0

2 17.4 17.4 7.8 .00 .000 .0 1

3 17.0 17.0 7.5 .00 .000 .0 1

4 17.5 17.5 8.5 .00 .000 .0 1

5 16.0 16.0 7.0 2.00 .000 .0 1

6 16.7 16.7 7.3 2.00 .000 .0 1

7 17.0 17.0 7.5 4.00 .000 .0 1

1 Water surface(s) have been specified

Unit weight of water = 10.00 (kN/m3)

Water Surface No. 1 specified by 2 coordinate points

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PHREATIC SURFACE,

**********************************

Point x-water y-water

No. (m) (m)

1 .00 20.00

2 125.00 20.00

A critical failure surface searching method, using a random

technique for generating CIRCULAR surfaces has been specified.

100 trial surfaces will be generated and analyzed.

10 Surfaces initiate from each of 10 points equally spacedalong the ground surface between x = 15.0 m

and x = 19.0 m

Each surface terminates between x = 31.0 m

and x = 40.0 m

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Unless further limitations were imposed, the minimum elevation

at which a surface extends is y = 5.0 m

1.0 m line segments define each trial failure surface.

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ANGULAR RESTRICTIONS

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The first segment of each failure surface will be inclined

within the angular range defined by :

Lower angular limit := -45.0 degrees

Upper angular limit := (slope angle - 5.0) degrees

Factors of safety have been calculated by the :

* * * * * SIMPLIFIED BISHOP METHOD * * * * *

The most critical circular failure surface

is specified by 17 coordinate points

Point x-surf y-surf

No. (m) (m)

1 17.67 20.00

2 18.66 19.85

3 19.65 19.77

4 20.65 19.75

5 21.65 19.80

6 22.64 19.91

7 23.63 20.09

8 24.60 20.34

9 25.55 20.64

10 26.48 21.01

11 27.38 21.44

12 28.26 21.9313 29.09 22.47

14 29.90 23.07

15 30.66 23.72

16 31.37 24.42

17 31.89 25.00

**** Simplified BISHOP FOS = .938 ****

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The following is a summary of the TEN most critical surfaces

Problem Description : tugasy

FOS Circle Center Radius Initial Terminal Resisting

(BISHOP) x-coord y-coord x-coord x-coord Moment

(m) (m) (m) (m) (m) (kN-m)

1. .938 20.42 34.94 15.19 17.67 31.89 2.039E+03

2. .982 22.52 30.71 11.28 19.00 32.24 2.069E+03

3. 1.028 20.15 36.80 17.22 16.33 32.70 2.930E+03

4. 1.036 21.22 31.18 12.03 16.78 31.55 2.262E+03

5. 1.039 23.01 27.46 8.47 19.00 31.12 1.659E+03

6. 1.049 20.98 44.43 24.60 18.11 36.07 5.011E+03

7. 1.054 21.54 32.37 13.42 16.33 32.74 3.101E+038. 1.060 18.72 38.19 18.48 15.44 31.65 2.353E+03

9. 1.071 21.52 32.78 13.97 15.89 33.11 3.500E+03

10. 1.076 23.61 28.09 9.54 18.56 32.62 2.487E+03

* * * END OF FILE * * *

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Dari data XSTABL

MR = 15360 kNm

SF min = 0.578

Koord bidang longsor X = 22.62 Y = 28.75

SF =

Mov =

SF rencana = 1.1

T allow = 16.7 kNm

MR = (1,1- 0,578) x Mov = 0,522 x 26574,39= 13871,83 kNm

Direncanakan ketebalan pemadatan tiap lapis = 30 cm = 0.3 m

Y 1 = 14.94 m

Y 2 = 14.44 m

Y 3 = 13.94 m

MR1 = T allow * y1

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= 100 * 14.94 = 1.494 kNm

MR2 = T allow * y2

= 100 * 14.44 = 1.444 kNm

MR3 = T allow * y3

= 100 * 13.94 = 1.394 kNm

( ) = 17,27 kN/m2

( ) = 20,15 kN/m2

( ) = 23,01 kN/m

2

( )= 25,91 kN/m

2

( )= 28,79 kN/m2

( )= 7,65 kN/m2

Dimana

E 1

S = kekuatan tarik bahan geotextile

SF = 2

= 6,812 m

= 5,839 m

= 5,113 m

= 4,541 m

= 6,457 m