## Solved Morgenstern Price Problem

## Solved Morgenstern Price Problem

(OP)

I need to do a "hand" calculation of the MOrgenstern Price Method for a simple two material slope with a known failure surface. I cannot use slope stability software as what I need to do is a check of the output of the software.

Is there an example I can be pointed towards using hand calcuations and/or excel based calcs? (I can use excel spreadsheets for this).

I am getting stuck on how to solve the problems and cannot find any examples in the materials I currently have and am not sure where to look for additional information and solved problems in this method.

Thank You!

Is there an example I can be pointed towards using hand calcuations and/or excel based calcs? (I can use excel spreadsheets for this).

I am getting stuck on how to solve the problems and cannot find any examples in the materials I currently have and am not sure where to look for additional information and solved problems in this method.

Thank You!

## RE: Solved Morgenstern Price Problem

Any reason you can't use a simpler method of slices like simplified Bishop, which CAN reasonably be done by hand? (Or a chart solution, or 2-3 sliding blocks?) Haven't done it in 25 years and would have to go look it up, but you could probably do SB as a spreadsheet much easier than with a calculator. Oldestguy and some others around here have probably done it with a sliderule and a beam compass to draw the circle on "D-size" graph paper.

My recollection is that simplified Bishop gives slightly lower FS than more "complete" methods like Spencer or MP. In many situations, the difference could be within the "noise" of material properties, subsurface geometry, piez conditions, etc.

## RE: Solved Morgenstern Price Problem

The engineer who did this calculation also used Janbu method (which I think I may be able to do but would also appreciate assistance on). We had instructed the engineer to use Bishops but unfortunately she decided that our advice was not to her liking, even though this was her first time doing such a calculation. I'm basically cleaning up a mess at this point and its going to be a difficult journey!

Too much information I know, but I understand why Bishops would be suggested, it lends itself to being solved by hand/spreadsheet far more. In fact, I have a pretty nifty fill in teh blank spreadsheet for that and for Ordinary Method.

## RE: Solved Morgenstern Price Problem

## RE: Solved Morgenstern Price Problem

My point here was that there is an awful lot of iterating to get an answer, once the MP spreadsheet is set up.

DRG

## RE: Solved Morgenstern Price Problem

I've never seen a client request a "hand calculation" to back-up software. If I were the client (which I often am), I would tend to challenge the basis for the analysis input, rather than the analysis itself. If you've got the inputs right, shouldn't be a problem with the analysis (providing you are using a "commonly accepted" piece of software).

## RE: Solved Morgenstern Price Problem

## RE: Solved Morgenstern Price Problem