Search results for query: *

a horizontal modulus of subgrade reaction is needed to design a monopole cell tower (70ft in height). soils encountered at the site consist of 30+ feet of poorly graded sand. N=75+ from ~12ft down. N=9 at 5ft. i'll do a keyword search as suggested. thanks pa24pilot

Does anyone know if there is an accepted way of determining the horizontal modulus of subgrade reaction from a laboratory test or maybe the results from other lab tests such as direct shear? I've seen charts based on blow counts but am curious if another method, other than an it-situ test, is...

I spent a summer with Schlumberger-Dowell and we used Hydrofluoric Acid in acid jobs from time to time. I think it was for wells that had sanded in.

I'm a relatively new project engineer and I'm having trouble convincing an owner on one of my projects that rock over 3-4 inches in dia. should be removed from over-ex material before replacement as engineered fill. I tried explaining the difficulty/impossibility of proper compaction to him...