If you can not be sure that the pipe interior will be cleaned before the pipe is filled, then I would suggest neglecting the contribution of the increase area. However, since they are pre-augered you may have a good chance at cleaning them out. The concrete and steel will exhibit different...
All of the comments have been interesting and appropriate. The authors, I can tell, are seasoned practitioners. The real issue is that engineering is a business. I have practiced for 30 years as a staff member of a firm and as an owner of "a small geotech practice". The major...
Focht3
It is not Woody...It is some else not quite as old! You and I sort of grew up together...our parents went to the same church. I'll call you...RM
I, like FOCHT3, am from the Houston area and practiced here for 30-years. He is correct. You should proceed carefully if you are new at this business. The soils will be the fat Beaumont clay with slickensides. Bell bottoms may be the predominant foundation in the area, but they can collapse...