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RE: Modulus of Subgrade Reaction[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: Modulus of Subgrade Reaction
- From: Bill Cain <bcainse(--nospam--at)live.com>
- Date: Tue, 14 Dec 2010 12:43:01 -0800
It is a large, pile supported concrete thrust block to resist the forces in an above ground pipe due to thermal expansion and contraction among other loads. In the case of the ones I'm working with they include dead load, water load, the thrust of horizontal bends in the pipe, friction loads caused by the packing at expansion joints, seismic loads and, in one case, traffic loads of a county road passing up and over the pipeline at the anchor. The anchors are located about 2500 feet apart on a 65" Ø riveted steel pipleline constructed in the late 1920s.|
Bill Cain, S.E.
Subject: RE: Modulus of Subgrade Reaction
Date: Tue, 14 Dec 2010 12:28:51 -0800
What’s a “temperature anchor”?
Don't forget the impact of oxidation of the peat type soils. I'm working on a project in the Sacramento-San Joaquin Delta where temperature anchors for a major water supply aqueduct show oxidation of the peat of 11-15 feet (yes, feet) over the past 82 years. This has resulted in the exposure and rotting of the tops of timber piles supporting the temperature anchors.
Peat is a weird material and normal soil behavior doesn't seem to apply. I hope you are not planning on long term support by the peat. Oxidation could cause huge "settlements".
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