Concrete soldier piles instead of wood laggings
Concrete soldier piles instead of wood laggings
(OP)
Hi,
I want to use concrete soldier piles instead of wood laggings. The plan is to use reinforced concrete piles every 8 to 10 feet, and cast plain concrete piles in between them. Thus, there will be no need to wood laggings.
The structural engineer do not agree with the plan based on his calculations. Though, it seems that nowadays this type of soldier piles in between of master piles are getting more common. The plan is to use them as a general plan in different conditions so the depth of excavation and soil type could vary.
I am looking for references (if available) and your comments and experiences with this respect.
Thanks
I want to use concrete soldier piles instead of wood laggings. The plan is to use reinforced concrete piles every 8 to 10 feet, and cast plain concrete piles in between them. Thus, there will be no need to wood laggings.
The structural engineer do not agree with the plan based on his calculations. Though, it seems that nowadays this type of soldier piles in between of master piles are getting more common. The plan is to use them as a general plan in different conditions so the depth of excavation and soil type could vary.
I am looking for references (if available) and your comments and experiences with this respect.
Thanks





RE: Concrete soldier piles instead of wood laggings
At first thought I tend to agree with the structural. Is your thinking that the reinforec piles would be called upon to take the majority of load through an arching action
RE: Concrete soldier piles instead of wood laggings
RE: Concrete soldier piles instead of wood laggings
I would suggest that you and the structural go over his calculations and see if you agree with his findings as the first step. You may find that he has used too large a load on the unreinforced sections. Some deflection evaluation may be required as well.
RE: Concrete soldier piles instead of wood laggings
RE: Concrete soldier piles instead of wood laggings
To give you a better understanding of the geometry of problem assume that we have 9 piles from west to east along a straight line. Piles no. 1, 5 and 9 are king piles (or master piles which are reinforced). The diameter of the piles is 1.0 m and center to center distance between the piles is 0.8 m. Therefore, each pile overlaps with the adjacent piles.
From a construction point of view piles no. 1, 3, 5, 7, and 9 are drilled first and will be filled with concrete. The day after, when the concrete is still fresh, piles no. 2, 4, 6, and 8 are drilled in between. In the latter procedure part of the fresh concrete of the adjacent piles (which were poured the day before) will be drilled as well. When the new concrete for piles no. 2, 4, 6, and 8 are poured a bond will be formed between the adjacent piles (new and old concrete). Therefore the adjacent piles are attached to each other and are assumed thatwill transfer loads to the king piles.
My main problem is with the bonding between the concrete in the adjacent piles. Further, I want to have an estimation of the loading on the plain concrete piles.
Hope that the above helps.
Tahnks
RE: Concrete soldier piles instead of wood laggings
RE: Concrete soldier piles instead of wood laggings
RE: Concrete soldier piles instead of wood laggings
RE: Concrete soldier piles instead of wood laggings
RE: Concrete soldier piles instead of wood laggings
Thanks for all the usefull responses. One of my clients requested for replacing conventional soldier pile and lagging system with secant piles for various projects. As I did not have any experience with this system, my first step was to understand the pros and cons of it. My client claims that this system is growing fast and there is a trend to use it, though I am not sure about it.
Anyways looking for sharing your experiences and opinions on this subject.
Best
RE: Concrete soldier piles instead of wood laggings
RE: Concrete soldier piles instead of wood laggings
RE: Concrete soldier piles instead of wood laggings
RE: Concrete soldier piles instead of wood laggings
It all comes down to constructability, cost and schedule.
RE: Concrete soldier piles instead of wood laggings
RE: Concrete soldier piles instead of wood laggings