Search results for query: *

Thank you for the reply. Augercast piles/preboring might not be possible options since sheet piles are going to be driven. The sheet piles are to be driven about 5 feet into sand and 2 to 4 feet into stiff clay. The problem is that there are structures nearby (100-150ft). We had previously...

Are there any known means or methods by which vibrations due to pile driving may be reduced?

Try to contact the manufacturers for the geotextile, they might be of help. I know a friend who called them about some soil-geotextile interaction issues and got a positive response. Let me know if this does not work out.

Panars, I used the Brom's method, I only get about 8 feet length. That is when I started looking for min embedment depth criteria. BigH, Thanks, I am looking through the other posts.

BigH, I checked the DM 7.2 after you said. Looks like AASHTO took the table from there. Its exactly the same one. Although the table id given in the ASD Analysis section, I think the values would be universal. Would'nt you agree?

nsong, Refer to Table 5.5.2B in the AASHTO Standard Specifications for Highway Bridges. They have a range of values for different types of soils and foundations. A max value of 0.7 may be used for concrete foundations on clean sound rock. I have never seen anyone use 0.9.

Everyone, Thank you for the valuable posts. Panars, I agree with you about DRIVEN program. I am also using the FHWA-IF-99-025 (Drilled Shafts: Construction Procedures and Design Methods). Table 13.1, P333 gives the Min Shaft penetrations for lateral loading. I am getting 42 feet length. I am not...

I am using the FHWA approved DRIVEN program to calculate the drilled shaft foundation lengths for several overhead sign structures. My shaft lengths are coming out to be very small (5 to 8 feet). I think they are too low possibly due to bigger diameters being used by the SE (36-inch). Are there...

eric1037, Which NAVFAC manual are you talking about? I have four or five of them.

swine, I am not sure about what you designed for but this foundation analysis is for a Bridge Abutment 150 feet wide passing over a six-lane highway. They are going to use micropiles and H-piles combination. I am not gonna get off as easy as your soils engr.

UcfSE, I agree with what you say.."accurately estimating" is a bit of a loose term so to speak and hence my posting. The SE I am working with insists that I do that and I am not sure how to do that! I am referring to Bowles it has some equations and stuff but to estimate that for 50 Borings...

Can anyone suggest ways of accurately estimating the Modulus of Subgrade Reaction for a soil. Available parameters: SPT N values, Moisture, Unconfined Compressive Strength & Angle of Internal Friction.

Thanks a ton that helps. Would U be able to give me a reference where I can read more about this.

Is the Soil Spring Constant the same as Modulus of Subgrade reacton? I argued with a collegue that it is not. Please tell me I am right! Can anyone give me references where I can get some info about Soil Spring Constant.