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RE: Subgrade Modulus for Mat Foundations

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What do you require for LRF design?
Thor


Email on the go, sent by TELUS

-----Original Message-----

From: Tom.Hunt(--nospam--at)fluor.com
Sent: Thu, 29 Jan 2009 10:27:02 -0800
To: <seaint(--nospam--at)seaint.org>
Received:  29 Jan 2009 18:27:56 +0000
Subject: Re: Subgrade Modulus for Mat Foundations

Joe,

The typical geotechnical recommendations for large mats would include 
guidance for allowable soil bearing, potential total and differential 
settlement, and an appropriate modulus of subgrade reaction suitable for 
the engineer to develop one way soil springs for a computer model.  For 
large mats the trick is normally in providing the correction factors for 
size effects as oppose to just reporting the 1 foot by 1 foot plate test 
results.  Typically soil bearing is given in either ksf or psf, settlement 
in inches, and MSR in kcf, kci, or pci.

Thomas Hunt, S.E.
Fluor





"Souther, Joseph" <SoutherJT(--nospam--at)cdm.com>
01/29/2009 10:00 AM
Please respond to seaint

To
<seaint(--nospam--at)seaint.org>
cc

Subject
Subgrade Modulus for Mat Foundations







As a geotechnical engineer, I wish to provide geotechnical design 
parameters to the structural engineer for design of a large (100 to 200 
foot) circular mat foundation. What parameters does the structural expect? 
What units (US job) are used for the design?
Thanks
Joseph T Souther, PE
CDM
11811 NE 1st Street, Suite 201
Bellevue, WA 98005
Reception:  (425) 453-8383
Direct/Fax:  (425) 519-8328
Mobile:       (425) 766-7517
www.cdm.com

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