Maximum spacing of Piles
Maximum spacing of Piles
(OP)
Hi
Can someone indicate to me the maximum spacing of piles. The piles we are dealing with are supported both by end bearing and friction. Most codes are on minimum spacing.
thanks
Can someone indicate to me the maximum spacing of piles. The piles we are dealing with are supported both by end bearing and friction. Most codes are on minimum spacing.
thanks





RE: Maximum spacing of Piles
RE: Maximum spacing of Piles
M.A.
RE: Maximum spacing of Piles
RE: Maximum spacing of Piles
HTH
VoD
RE: Maximum spacing of Piles
Voi :
1. what is the formula that you use to calculation group piles to get efficiency group factor (coverse labare, vesic, or..)
2. can you share the layout of group pile and working load on single pile and also working load will be supported by pile group?
generaly, if spacing pile to pile (centre-centre) more than 3 times of pile perimeter, group reduction factors need not be applied,
i.e : Pile Dia = 3ft, -> 3 x pi() x 3ft = 28 ft --> no need to applied reduction factor. (source: code of practice for foundation_2004_HK)
[CMMIW]
this indicate no maximum spacing pile in pile group, if the spacing more than 3 times pile perimeter the group pile axial capacity is sum of axial single pile.
M.A.
RE: Maximum spacing of Piles
Does the code say 3 x pile diameter ( 9 ft) or 3 x pile perimeter ( 28 ft) in my case? . The difference is quite huge.
RE: Maximum spacing of Piles
M.A.
RE: Maximum spacing of Piles
You said they piles will depend on end bearing and friction. I don't know your load magnitudes, but two 18" piles will have the same perimeter as one 36" pile and need only half the concrete.
What is your individual pile design load? What are the group loads? What is the soil type?
RE: Maximum spacing of Piles
Thanks for all the contributions. I have managed to obtain the information I needed. Basically there is no limit on maximum spacing of piles but is governed by the pile cap design which becomes uneconomical if the spacing is too large. Tomlinson ( Pile Design and Construction Practice) covers it very well and in detail.He also reports on the Swedish code i.e for end bearing + friction piles the minimum spacing should be.
< than 10 m depth .... 3 x diameter
10 -25 m .... 4 x diameter
>25 m .... 5 x diameter
voi
RE: Maximum spacing of Piles
RE: Maximum spacing of Piles
RE: Maximum spacing of Piles
f-d
¡papá gordo ain’t no madre flaca!
RE: Maximum spacing of Piles
RE: Maximum spacing of Piles
Dik