Attention #geotechnicalengineers designing #soilnail #walls, don't use Bishop's method for soil nailing walls. I recently had a debate here on LinkedIn and challenged a bet of $10000 as proof that the produced circular #slopestability surface was not critical for a #soilnailwall. Well my bet was not taken, but the #engineer took up my offer to see what I had to say. An automatic search analysis with the #general-limit-equilibrium based on an evolution algorithm in our #SnailPlus software showed that the safety factors were closer to unity vs. a circular search giving more than 1.35 in from what I call a software program developed by people with no idea of how soil nail walls should be. There were more findings, but the bottom line is: You need the right tools and experience if you want better design results and minimize #geotechnical #risks. Don't go cheap on your arsenal! Follow Deep Excavation LLC, and get our soil nailing software program.
Good luck
Was the issue with Bishop method analyzing a failure surface that intersects the nail or using Bishop for global surfaces that may be outside the wall and nail system? I
Shahin Ghanooni
9mo
Hi Dimitrios, I would like to see the results of your soil nail recommended software compared to a finite element method specially under a seismic pseudo static load. Please pm me.
Dear Dimitrios, Thanks for posting such a useful information. But I beg to differ from this as I have used general limit equilibrium software and Snail. The comparison made in the example is based on simplistic approach of considering soil layer of constant thickness. However in reality it is not so and mostly the soil layers are parallel to the slope and not ground. Also you have shown the soil nailing for stabilising the slope in cutting with well defined inclination of slope. However, in case of hill slopes, the inclination of slope is not that smooth and then commercially available software based on general limit equilibrium comes for rescue.
Associate Civil Engineer-Geotechnical Engineer
9moThis is a game-changing claim. I know guidelines which recommend Slope/w which is a limit-equilibrium software for soil nail wall FoS estimate. Are you able to provide concrete proof for the claim?