Lateral Subgrade Reaction for Rock
Lateral Subgrade Reaction for Rock
(OP)
I am making a model to analyse the pile, I need to have value of the "Lateral Modulus of Subgrade Reaction of Rock" in order to model the spring support, can anybody give me information about this. I have a book called ' Foundation Analysis and Design by J.E Bowles', it only gives me info for different types of soil. Please suggest another literature!! Thanks





RE: Lateral Subgrade Reaction for Rock
Please be aware that the modulus of subgrade reaction is not an unique property; it is a factor of convenience. "The" modulus of subgrade reaction for any soil or rock does not exist.
RE: Lateral Subgrade Reaction for Rock
For the spring support, I need to input a spring constant for representing the type of soil I have, and it is measured in the unit of (Force per unit displacement). Therefore, I think the use of lateral modulus of subgrade reaction is appropriate, (I am interested in getting the lateral movement of the portal frame!!).
I have already got a range of lateral modulus of subgrade reaction for several types of soil, but I need the same information for the rock. Please advice!!
RE: Lateral Subgrade Reaction for Rock
RE: Lateral Subgrade Reaction for Rock
Unless your bridge is a small, seldom used pedestrian bridge with a very short span and located over a normally dry creek, simply assuming values is an extremely foolish undertaking. Hell, it's foolish even then. Forget Bowles' book - it's about to get you in trouble.
Sounds like you need the help of a competent geotechnical engineer familiar with your area.
RE: Lateral Subgrade Reaction for Rock
I am currently setting up an integral bridge model, and have the same problem that you had in determining the lateral modulus of subgrade reaction for chalk.
Out of interest, how did you overcome this problem in the end?
RE: Lateral Subgrade Reaction for Rock
I am currently setting up an integral bridge model, and have the same problem that you had in determining the lateral modulus of subgrade reaction for chalk.
Out of interest, how did you overcome this problem in the end?
Any advice would be much appreciated!
RE: Lateral Subgrade Reaction for Rock
RE: Lateral Subgrade Reaction for Rock
RE: Lateral Subgrade Reaction for Rock
RE: Lateral Subgrade Reaction for Rock
If you are/were at the University of Houston, perhaps you know Dr. Michael W. O'Neill in the CE Department. Mike is very knowledgeable about p-y curves, and might help you to help your friend with his problem. He could at least suggest a few references -
Anyway, it's a thought.