Transcription of Geotechnical Manual (GEO)
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Geotechnical Manual (GEO)
Geotechnical ManualMarch 2018 2018 by Texas Department of Transportation(512) 463-8630 all rights reservedManual Notice 2018-1 From:Gregg A. Freeby, , Director, Bridge DivisionManual: Geotechnical ManualEffective Date:March 01, 2018 PurposeThis Manual provides guidance to districts in Geotechnical investigation and design for project revisions contained in each chapter of this version are to clarify the policy and high-level procedures published in 2012. Generally, revisions to the Manual were to: update information in Chapter 3 regarding Standard penetration Testing design methodologies; make minor editorial changes to Chapter 4; make editorial changes to the design requirements for various retaining walls in Chapter 6; and provide clarification on the infinite slope analysis in Chapter 5 underwent significant revisions and updates, which include: adding an upper limit to the skin friction and point bearing graphs for Texas Cone penetration values harder than 100 blows/12
Texas Cone Penetration tests. Conduct Texas Cone Penetrati on tests at 5-ft. intervals beginning at a 5-ft. depth. Standard penetr ation test data is not acceptab le for foundation design using the TxDOT design procedure. Near surface soil layer te st. Test soft near surface soil layers (0 …
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