Slope Stability Analysis

#1 Posted: 2023/9/16 05:01:44

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Ref: Example 12.2 (Page 296) - Soil Mechanics : Principles and Practice by G.E. Barnes.

The attached SM file demonstrates how to find cutting points of strips with the slope profile and slip circle.
(for an assumed strip width of 1m. which can be changed if necessary).

Slip_Circle_Barnes-Ex 12.2-TO FORUM.pdf (238.31 KiB) downloaded 516 time(s).
Slip_Circle_Barnes-Ex 12.2-TO FORUM.sm (320.99 KiB) downloaded 995 time(s).

Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka

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sergio 2023/9/16 06:05:00, Dionysios J. Pantazis 2023/10/31 02:31:00

#2 Posted: 2023/9/16 07:51:13

NDTM Amarasekera

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A small text correction to my post #1.
Sorry for inconvenience please.

Point A and Toe are also same.

Slip_Circle_Barnes-Ex 12.2-Text Correction.png

Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka

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Alvaro 2023/9/17 17:18:00, Oscar Campo 2023/9/16 10:55:00

#3 Posted: 2023/9/16 13:06:16

NDTM Amarasekera

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Hi,
Second correction, as the variable Hvc is no longer used in the entire program. Please delete the entire line as indicated.
Extremely sorry.

Slip_Circle_Barnes-Ex 12.2-Correction2.png

Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka

#4 Posted: 2023/9/20 01:55:02

NDTM Amarasekera

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Hi,

The complete solution to Slope Stability Analysis of above example.
Analysis is carried out in 2 parts.

1. With one assumed Center of a slip circle to explain steps involved and resulting cordinates of strips etc., and checked with ACAD drawing.

2. Program to find the minimum factor of safety using multiple arrays of centers.

Slip_Circle_Barnes-Ex 12.2-Min FS-R8-CORRECT-FINAL-R4.pdf (334.22 KiB) downloaded 486 time(s).

Slip_Circle_Barnes-Ex 12.2-Min FS-R8-CORRECT-FINAL-R4.sm (522.82 KiB) downloaded 928 time(s).

Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka

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Alvaro 2023/9/20 13:14:00, Oscar Campo 2023/9/20 06:39:00, ioan92 2023/9/20 08:01:00

#5 Posted: 2023/9/21 07:45:50

NDTM Amarasekera

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Hi,

Please make the correction as shown ( replace A with -A in page 3).
Even without this correction, the program will run in most cases, but will give
wrong values for AA for some center cordinates.

This correction is an improvement.
Sorry for the inconvenience.

Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka

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Oscar Campo 2023/9/21 13:47:00

#6 Posted: 2023/10/28 21:32:18

NDTM Amarasekera

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An improved method to my post #5.
I get Wrong Values OR Errors when using the "Findroot()" function for some center cordinates.

This new method mainly uses "root()" function, with few supporting programs.

Slip Circle Intersection Points - TO FORUM.pdf (392.59 KiB) downloaded 498 time(s).
Slip Circle Intersection Points - TO FORUM.sm (247.73 KiB) downloaded 951 time(s).

Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka

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Oscar Campo 2023/10/28 22:03:00, Alvaro 2023/10/29 03:11:00, sergio 2023/10/30 15:59:00

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Slope Stability Analysis

Slope Stability Analysis - A basic approach to find cutting points of strips with profile and slip circle - Messages

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Slope Stability Analysis - A basic approach to find cutting points of strips with profile and slip circle - Messages