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Re:Drilled Pier Question[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: Re:Drilled Pier Question
- From: tbenson(--nospam--at)lowney.com
- Date: Mon, 23 Nov 1998 13:57:30 -0800
Bob, Pier diameters can be a function of the earth materials. For example, in southwestern river channels with gravel and cobbles, small diameter piers are difficult to auger. To answer your question, though, in clays and silts, a 12-inch diameter bucket auger can be used. Nevertheless, this is unusual in Southern California (at least). Typically specified minimum diameter in soils is 18-inches. Size increments typically are 6 inches (e.g. 24, 30, and 36 inches). I suppose you could auger a smaller diameter hole (4 to 8 inches), but plumbness, reinforcement spacing and cover, concrete placement, and bending strength for the retaining wall can all become problems. Tom Benson, GE, at Lowney Associates ____________________Reply Separator____________________ Subject: Drilled Pier Question Author: <seaint(--nospam--at)seaint.org> Date: 11/21/98 6:15 PM What is the minimum shaft diameter possible and what is the increment in diameters? I am currently investigating the possibility using a single row of drilled piers to laterally support a retaining wall for a flood control channel and would like to keep the pier diameter as small as possible. Bob Conley, P.E.
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