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RE: Paving on grade[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: Paving on grade
- From: "Nukala, Lakshmana R" <lrnukala(--nospam--at)rasgas.com.qa>
- Date: Tue, 21 Mar 2006 09:57:37 +0300
- Priority: normal
The problem is Cushions are not acceptable, as it requires preparatory works prior to every lifting activity. We are looking at replacing of the paving with a thicker slab.
(Cannot think of soil improvement, because its a live plant with lot of U/G utilities)
Hoping that reference given by Rajendran would help me in working out the effective area of paving that would be consider for supporting out rigger.
Lakshmana RK Nukala
Ph: + 974 - 4732633 / 5778637
From: S. Gordin [mailto:mailbox(--nospam--at)sgeconsulting.com]
Sent: Monday, March 20, 2006 5:27 PM
Subject: Re: Paving on grade
If I understand you correctly, you are trying to accommodate a 70 metric ton (154,000-lb) live load with a 200 mm (7.87") slab reinforced with welded wire fabric.
If so, the slab may not work. Let's say, you put some large and thick "cushions" under the outriggers and check the punching shear in concrete and soil pressure under the slab. With some reasonable (and not necessarily conservative) assumptions, these "cushions" appear to measure about 7.5' (2300 mm) square.
If the above considerations are not prohibitive, the bending of the slab itself may be verified using PCA Concrete Floors on Ground or ACI 360.
Steve Gordin SE
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