HOW TO USE LATERAL SOIL BEARING IBC TABLE 1804.2?
HOW TO USE LATERAL SOIL BEARING IBC TABLE 1804.2?
(OP)
In designing an anchored bulkhead without specific geotech info, is it right to use the lateral bearing values in the IBC table 1804.2 for passive resistance at toe of pile? These numbers seem very conservative? What assumptions do they include do they include? What if the soil is submerged how do/should you use this value...backcalc a Kp multiply against an assumed submerged unit weight? Also, seeing the IBC values are conservative, are there any minimum factors of safety prescribed in the code for design, I cannot find them? Any help help would be appreciated.





RE: HOW TO USE LATERAL SOIL BEARING IBC TABLE 1804.2?
If you have any condition that is not textbook, straight to the point, no deviation, then the values are conservative. If there is anything out of the ordinary, _anything_, get the geotech information you need.
Factor of safety applied? well, you can only determine that if you know the actual conditions and appropriate values, right?
RE: HOW TO USE LATERAL SOIL BEARING IBC TABLE 1804.2?
RE: HOW TO USE LATERAL SOIL BEARING IBC TABLE 1804.2?
1. Search the table for footnotes, usually contain usefull information for better understanding, or references for further reading.
2. Contact the source directly.
3. Looking for person that has the similar experience in the forum/communities as you have done here.
If all failed, I would do:
4. Backcal a few values given in the table:
- Determine soil type and set its properties from reputable sources, textbook in general.
- Calculate and compare the results (note, for certain type of soil this may involve several cals. For example, sand - internal friction ranges from 27 - 35 degrees, density ....so on)
After that, your number may or may not come close. If not, you have to repeat the whole cycle again, or give up using the table you don't understand.
I will do the above for my own good only (understand how the table was constructed). For real project, get geotech involved, unless you are quite confident on what you are facing.
RE: HOW TO USE LATERAL SOIL BEARING IBC TABLE 1804.2?
RE: HOW TO USE LATERAL SOIL BEARING IBC TABLE 1804.2?
He will also need to know the type of structure involved in the design, as some structures are less critical than others, so the pile is allowed to impart a larger load to the soil matrix.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask