Geotech 2012 Revisions to Standard Specifications

Dtl/Provision #	Standard Name	Memo	New/Revised	Effective Date	Standard Type	Summary of Changes
8,9	Reinforced Soil Slopes, Cellular Confinement Systems		Revised	9/17/2024	Provision	Makes changes associated with 2024 Standard Specifications Adds a new pay item, “Compost Blanket for Geocells”
	Sound Barrier Wall Foundation Recommendations Memo Template	Memo Link	Revised	8/2/2024	Form	Updates GEU Unit Head name Revises recommendations table for latest Standard Sound Barrier Wall Foundation Selection Tables
	Geotechnical Summary Tables		Revised	1/1/2024	Form	Revisions and additions to the Geotechnical Summary Tables will no longer be recorded here but the tables will continue to be updated in the future. The latest Geotechnical Summary Tables Excel Sheet is available from the GEU Website here- Cells, Details, and Forms (ncdot.gov)
	Summary of Quantities Worksheet		Revised	1/1/2024	Form	Revisions and additions to the Summary of Quantities Worksheet will no longer be recorded here but the worksheet will continue to be updated in the future. The latest Summary of Quantities Worksheet is available from the GEU Website here- Cells, Details, and Forms (ncdot.gov)
	Geotechnical Foundation Tables		Revised	1/1/2024	Form	Revisions and additions to the Geotechnical Foundation Tables will no longer be recorded here but the tables will continue to be updated in the future. The latest Geotechnical Foundation Tables Excel Sheet is available from the GEU Website here- Cells, Details, and Forms (ncdot.gov)
	Geotechnical Design Cell Library		Revised	1/1/2024	Cell	Revisions and additions to the Geotechnical Design Cell Library will no longer be recorded here but the cell library will continue to be updated in the future. The latest Geotechnical Design Cell Library is provided with the latest NCDOT Geotechnical Workspace.
SP05 R008	Aggregate Subgrade	Memo Link	Revised	3/21/2023	Provision	Renames "Subbase" as "Subsoil" defined as the portion of the roadbed below the Class IV subgrade stabilization Replaces "Geotextile for Soil Stabilization, Type 4" with "Geotextile for Subgrade Stabilization, Type 5" and adds pay item for Geotextile for Subgrade Stabilization
SP05 R009	Geotextile for Subgrade Stabilization		New	3/21/2023	Provision	Renames "Geotextile for Pavement Stabilzation" as "Geotextile for Subgrade Stabilization" Turns geotextile 90 degrees, parallel to survey line, with the minimum roll width required under roadway edges and shoulders nearest to fill slopes
SP05 R017	Aggregate Subgrade in Lieu of Chemical Stabilization		Revised	3/21/2023	Provision	Renames provision from "Class IV Subgrade Stabilization in Lieu of Chemical Stabilization" to "Aggregate Subgrade in Lieu of Chemical Stabilization" Adds reference to Type 2 Aggregate Subgrade
SP10 R056	Geosynthetics		New	3/21/2023	Provision	Updates Type 5 Geotextile to Class 4A Geotextile in accordance with AASHTO M288 and incorporates new AASHTO NTPEP SSGEO Work Plan
	Geotechnical Summary Tables		Revised	2/3/2023	Form	Updates tables for Geotextile for Subgrade Stabilzation changes
	Summary of Quantities Worksheet		Revised	2/2/2023	Form	Updates pay item information for Aggregate Subgrade changes
3,4,5,6	MSE, Anchored, Soil Nail and Soldier Pile Retaining Walls (LRFD)		Revised	10/19/2021	Provision	Redefines H, "Design Height and "Wall Height" Adds geostrip reinforcement for MSE walls Adds black base cap for paving on aggregate above and behind MSE, anchored and soldier pile walls Changes pH requirement for PET geogrid reinforcement for MSE walls from 5-8 to 4.5-9 Updates seismic design criteria for MSE walls to be consistent with other previously updated wall provisions and current AASHTO & NCDOT Structures Management policies/guidelines Adds requirement that PP geogrids for MSE walls be made in the USA Eliminates HDPE bearing pads from MSE walls with panels Sets minimum steel gauge and grade for steel strip connectors for MSE walls with panels Clarifies measurement and payment for backfilling behind MSE, anchored and soldier pile walls Updates Soil Nail Retaining Walls provision for the latest editions of the AASHTO LRFD Bridge Design Specifications and AASHTO LRFD Bridge Construction Specifications
	Standard MSE, Anchored, Soil Nail, Soldier Pile, Precast and Segmental Gravity Wall Notes		Revised	10/19/2021	Notes	Redefines H, "Design Height" and "Wall Height" Relabels "Backfill" material as "Retained" material for MSE, precast and segmental gravity walls Adds seismic note for MSE walls for consistency with changes to MSE Wall provision for seismic criteria Removes pile sleeves note from MSE wall notes and adds new reworded pile sleeves note to standard foundation notes
	Standard MSE, Anchored, Soil Nail, Soldier Pile, Precast and Segmental Gravity Wall Cells		Revised	10/19/2021	Cell	Redefines H, "Design Height" and "Wall Height" Relabels "Backfill" material as "Retained" material for MSE, precast and segmental gravity walls Adds geostrip reinforcement for MSE walls Adds black base cap for paving on aggregate above and behind MSE, anchored and soldier pile walls
17	Micropiles (LRFD)		Revised	10/19/2021	Provision	Adds option for ASTM A252 reinforcing casing with 80 ksi yield strength
10	Rock Embankments		Revised	10/19/2021	Provision	Updates measurement and payment to avoid duplicate pay items in contracts
453.01	Standard CIP Gravity Retaining Wall		Revised	10/19/2021	Detail	Redefines H, "Design Height" and "Wall Height"
454.01,02	Standard Segmental Gravity Retaining Walls		Revised	10/19/2021	Detail	Redefines H, "Design Height" and "Wall Height" Increases maximum wall height to 5 ft by increasing minimum wall batter and moving traffic surcharge further behind wall face
1801.02	Standard Temporary Wall		Revised	10/19/2021	Detail	Updates notes on sheet 2 to reflect changes to NCDOT Geosynthetic Reinforcement Evaluation Program
	Geotechnical Design Cell Library		Revised	10/19/2021	Cell	Adds Wall ID with corresponding instructions to structure borders
	Concrete Barrier Rail With Moment Slab Details		Revised	10/19/2021	Cell	Adds note to align joints in rail with joints in wall facing
11,12	Standard Shoring and Temporary Soil Nail Walls		Revised	10/19/2021	Provision	Updates Temporary Soil Nail Walls provision to reflect previous and current applicable updates in the Soil Nail Retaining Walls provision Adds hollow bar nails as an option for temporary soil nail walls Updates neat cement grout requirements for temporary soil nail walls to be consistent with changes made previously in the Soil Nail Retaining Walls provisions Updates Standard Shoring provision for changes to NCDOT Geosynthetic Reinforcement Evaluation Program
SP11 R002	Temporary Shoring		Revised	10/19/2021	Provision	Updates neat cement grout requirements to be consistent with changes made previously in the Anchored Retaining Walls provision Updates Standard Shoring provision for changes to NCDOT Geosynthetic Reinforcement Evaluation Program
	Standard Foundation Notes (LRFD)		Revised	10/19/2021	Notes	Adds new reworded pile sleeves note that was removed from MSE wall notes Removes about half the standard foundation notes and rewords some others for the new geotechnical foundation tables
SP04 R005	Piles	Memo Link	New	10/19/2021	Provision	Makes changes to Section 450 to implement new geotechnical foundation tables and pile order lengths for all prestressed concrete piles
	Geotechnical Foundation Tables	Memo Link	New	10/19/2021	Form	Microsoft Excel sheet with geotechnical foundation tables for the Structure plans Includes tables for pile, drilled pier, spread footing and micropile foundations
17	Micropiles (LRFD)		New	4/21/2020	Provision	Standardizes current Micropiles Project Special Provision Requires the use of a prequalified Micropile Contractor and a prequalified Micropile Design Consultant Conforms to current AASHTO LRFD Bridge Design Specifications for LRFD micropile design Uses nominal wall thickness for reinforcing casings Conforms to current AASHTO LRFD Bridge Construction Specifications for micropile load testing Specifies prime mill certified steel pipes for reinforcing casings that meet NCDOT "Buy American" requirements
	Standard Micropile Notes		New	4/21/2020	Notes	Standardizes current micropile notes on plans to be consistent with new Micropiles (LRFD) provision
	Geotechnical Summary Tables		Revised	12/17/2019	Form	Adds new table for horizontal drains

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Geotechnical Geotech 2012 Revisions to Standard Specifications Geotech Revisions and Additions

Geotechnical
Geotech 2012 Revisions to Standard Specifications

Geotech Revisions and Additions