Permanent Soldier Pile Wall Question
Permanent Soldier Pile Wall Question
(OP)
Permanent Soldier Pile Wall
Wall height (H) = 12 feet
Using 14x73 H piles with precast concrete lagging
Deflection is limited to H/100 => 1.44 inches
Soil:
Sand = 120 pcf, phi=28 from top of wall to 21 feet
Sand = 120 pcf, phi=32 from 21 feet to 40 feet
I have a traffic surcharge of an additional 2 feet of fill behind the wall and level back fill.
I have a 14x73 H pile in the center of a 30 inch predrilled hole which will be filled with 3,000 psi concrete. I saw a thread about this but my question was not answered.
I want to determine the composite stiffness to use below the dredge line to keep my deflection down. Everything I have found online is the reinforced concrete design example with a row of rebar in the tension side of a beam, no circular shafts or columns.
Using just concrete or just the h pile seems too conservative, especially with the very limited deflection.
Wall height (H) = 12 feet
Using 14x73 H piles with precast concrete lagging
Deflection is limited to H/100 => 1.44 inches
Soil:
Sand = 120 pcf, phi=28 from top of wall to 21 feet
Sand = 120 pcf, phi=32 from 21 feet to 40 feet
I have a traffic surcharge of an additional 2 feet of fill behind the wall and level back fill.
I have a 14x73 H pile in the center of a 30 inch predrilled hole which will be filled with 3,000 psi concrete. I saw a thread about this but my question was not answered.
I want to determine the composite stiffness to use below the dredge line to keep my deflection down. Everything I have found online is the reinforced concrete design example with a row of rebar in the tension side of a beam, no circular shafts or columns.
Using just concrete or just the h pile seems too conservative, especially with the very limited deflection.





RE: Permanent Soldier Pile Wall Question
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RE: Permanent Soldier Pile Wall Question
Also, if you are using precast lagging, I hope you are building a fill wall where you can stack the lagging from the bottom up. It is hard to install concrete lagging in lifts as the excavation is being made. If you are building a fill wall with drilled soldier beams and concrete lagging, you probably are building an uneconomical wall.
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RE: Permanent Soldier Pile Wall Question
RE: Permanent Soldier Pile Wall Question
RE: Permanent Soldier Pile Wall Question
If you are placing a permanent concrete foundation wall next to the W shapes, then composite stud action will work to attach the p[ile to the concrete wall, but, since the W shape is already loaded laterally, the composite action will only affect lateral deflections if the wall is further loaded laterally.
Have you considered using soil arching action to decrease the lateral load to the pile. If not, ask your geotech.
The load reduction may give you the lateral deflections that were recommended.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Permanent Soldier Pile Wall Question
Can you give more detail how did you calculation the deflection? any source for the calculation?
thanks!
RE: Permanent Soldier Pile Wall Question
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RE: Permanent Soldier Pile Wall Question
RE: Permanent Soldier Pile Wall Question
As with any program, you first need to know how to do the calcs by hand. You also need to know how the program is calculating the results. If not, it's just a block box for GIGO.
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RE: Permanent Soldier Pile Wall Question
RE: Permanent Soldier Pile Wall Question
RE: Permanent Soldier Pile Wall Question
www.PeirceEngineering.com