FILL TYPE RETAINING WALLS by 6ur85O

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									    FILL TYPE
RETAINING WALLS
               EI 10-031
               EB 10-041
               EB 10-042
Overview: Wall Categories
   Based on how they work:
Overview: Wall Categories
   Based on how they are constructed
       ◦ Cut Walls: Wall is constructed “top-down”.
Overview: Wall Categories
   ◦ Fill Walls: Wall is constructed “bottom-up”.
Overview: Wall Categories
   Highway Design
    Manual
      Table 9-6
       Classification of
       Retaining Wall
       Systems
Background:
Proprietary Wall Systems
 Proprietary walls - Vendor designed
  systems protected by specific patents.
 Proprietary systems can only be used on
  State projects as follows:
    ◦ Chosen by competitive bid
    ◦ No suitable alternative
      Synchronization: One item only fits in a series of items, or it
       is part of a system
      Provides a unique function
    ◦ Experimental feature: Requires an approved
      Experimental Work Plan
    ◦ Public Interest – needs project-by-project approval
Background:
Proprietary Wall Systems
   These rules apply to any project with
    Federal money
    (incl. Pass-Thru projects & federally funded
    maintenance projects).
   Proprietary items are submitted at PS&E
    (with supporting documentation and justification to
    FHWA)
 A bid proposal with an item not on the AL
  could be declared “nonresponsive”
 Approved List’s with less than 3 systems
  require justification.
Background:
Proprietary Wall Systems

   Four Proprietary Fill Type Retaining Wall
    Categories:
      Mechanically Stabilized Earth System
      Mechanically Stabilized Segmental Block Retaining
       Wall System
      Precast Modular Wall System
      Segmental Block Retaining Wall System
   Approved List
FILL WALLS
Merge Existing Specifications

   Section 554  Section 632  SBRWS Special



                                          Materials
                                           Bureau
                                           Testing
                                           Issue

       Section 554 Fill Type Retaining Walls
Side Issue: Testing Blocks
   Wet-Cast Products                 Dry-Cast Products
    ◦ Manufactured & shipped to     ◦ Manufactured in lots.
      job site in a matter of days. ◦ Quarantined for sampling
    ◦ Based on performance criteria   and freeze-thaw testing.
      thru NYSDOT administered      ◦ Delayed from shipping until
      QC/QA program.                  acceptable test results.
       ◦ Historical data of test
         results.
       ◦ Sampling and testing audit
         operations.


          Fairness in Testing Procedures
           
          Materials Procedure MP 09-03:
     Concrete Masonry Unit QA/QC Procedures
Overview: Definitions of Terms
   Wall System
    ◦ Face units are the
      structural support.



   Internally Stabilized
    Wall System
    ◦ Reinforcement added to
      a “wall system” to increase
      achievable wall heights.


   Internally Stabilized
    Earth System
    ◦ Reinforcement is the structural support.
    ◦ Face panels alone could not be a “wall system”.
Overview: Definitions of Terms
Fill Type Retaining Walls
     Prefabricated Wall System
                           Open Top Face




          Solid Face


     Mechanically Stabilized Wall System
          “Reinforced Prefabricated Wall Systems”
     Mechanically Stabilized Earth System
New Issuances
   Construction
                                                                                                                EB 10-041
     ◦ Standard Sheets
   M554-1   (554.01   Sheet   1   of   5)   Proprietary   Fill   Type   Retaining   Walls   (General Notes)
   M554-2   (554.01   Sheet   2   of   5)   Proprietary   Fill   Type   Retaining   Walls   (General Details)
   M554-3   (554.01   Sheet   3   of   5)   Proprietary   Fill   Type   Retaining   Walls   (Typical Sections for MSES)
   M554-4   (554.01   Sheet   4   of   5)   Proprietary   Fill   Type   Retaining   Walls   (Typical Sections for MSWS)
   M554-5   (554.01   Sheet   5   of   5)   Proprietary   Fill   Type   Retaining   Walls   (Typical Sections for PWS)

   M554-6 (554.02 Sheet 1 of 6) Geosynthetically Reinforced Soil Systems (Walls-General Notes and Details)
   M554-7 (554.02 Sheet 2 of 6) Geosynthetically Reinforced Soil Systems (Walls-Typical Sections)
   M554-8 (554.02 Sheet 3 of 6) Geosynthetically Reinforced Soil Systems (Slopes-General Notes and Details)
   M554-9 (554.02 Sheet 4 of 6) Geosynthetically Reinforced Soil Systems (Slopes-Typical Sections)
   M554-10 (554.02 Sheet 5 of 6) Geosynthetically Reinforced Soil Systems (Facing Details)
   M554-11 (554.02 Sheet 6 of 6) Geosynthetically Reinforced Soil Systems (Facing Details)

   Design
     ◦ HDM Revision No. 60 (Chapter 9)                                                                          EB 10-042
         Section 9.4 Retaining Walls and Reinforced Soil
          Slopes
New Issuances
   Design                                                                                EI 10-031
     ◦ GRSS Specification
           ◦ Item 554.30XX Geosynthetically Reinforced Soil System Wall
           ◦ Item 554.31 Geosynthetically Reinforced Soil System Slope
     ◦ Fill Type Retaining Wall Specification
           ◦   Item   554.40   Fill   Type   Retaining   Wall   (0-1 m)
           ◦   Item   554.41   Fill   Type   Retaining   Wall   (Greater   than   1 m – 1.8 m)
           ◦   Item   554.42   Fill   Type   Retaining   Wall   (Greater   than   1.8 m – 2.7 m)
           ◦   Item   554.43   Fill   Type   Retaining   Wall   (Greater   than   2.7 m – 3.7 m)
           ◦   Item   554.44   Fill   Type   Retaining   Wall   (Greater   than   3.7 m – 4.6 m)
           ◦   Item   554.45   Fill   Type   Retaining   Wall   (Greater   than   4.6 m)
     ◦ Fill Type Retaining Wall Aesthetic Specification
   Item 554.5001 Fill Type Retaining Wall Aesthetic Treatment – Textured Surface (Hand Tooled, Raked, etc.),
    No Color
   Item 554.5002 Fill Type Retaining Wall Aesthetic Treatment – Textured Surface (Hand Tooled, Raked, etc.),
    Integral Color
   Item 554.5101 Fill Type Retaining Wall Aesthetic Treatment – Exposed Aggregate Finish, No Color
   Item 554.5102 Fill Type Retaining Wall Aesthetic Treatment – Exposed Aggregate Finish, Integral Color
   Item 554.5201 Fill Type Retaining Wall Aesthetic Treatment – Architectural Pattern, No Color
   Item 554.5202 Fill Type Retaining Wall Aesthetic Treatment – Architectural Pattern, Integral Color
   Item 554.53 Fill Type Retaining Wall Aesthetic Treatment – Other; As shown in the Contract Documents
Aesthetics




Default PWS                      Default PWS                      Default MSES:
(open top face units):           (solid face units):              •Plain, smooth concrete finish
•Plain, smooth concrete finish   •Split face finish               •Natural concrete (gray) color
•Natural concrete (gray) color   •Natural concrete (gray) color
Aesthetics                   Precast Panels or
                           PWS (Open Top Face Units)
                                                            PWS
                                                       (Solid Face Units)



Textured Surface




Exposed Aggregate Finish




Architectural Pattern
Expanded Approved List
                                                          Drycast
   Design
                                                        Concrete Wall
Assumptions
                                                           Units
                     Hyperlink            Hyperlink




                                                       Prefabricated Wall Systems
  Mechanically                   Master                           &
                                                       Mechanically Stabilized
  Stabilized Earth
  Systems
                                  List                 Wall Systems




                     Hyperlink             Hyperlink

   Precast                                                Precast
  Concrete                                             Concrete Wall
 Panel Units                                               Units
Expanded Approved List
 20 wall systems competitively bid against
  each other
 Don’t Eliminate – Enumerate!
     Use Special Notes:
EX. Notes for Use with Fill Type Retaining Walls in Underwater Applications:
1. The Design High Water at elevation ___ is above the bottom of wall elevation.
2. If metallic elements are used, provide additional corrosive protection to account for
   fluctuating water conditions throughout a 75-year design life.
3. If soil reinforcing elements are used, provide certification by a NYS PE that the
   design accounts for the reduced resisting soil pressures under buoyant conditions.
4. For any wall type, provide certification by a NYS PE that the wall will be stable under
   buoyant conditions.
5. If ice contact is expected, ensure the durability of the wall to withstand such forces.
6. Provide adequate prevention of the migration of soil through wall joints.
7. Provide weep holes with inverts no more than 4” above OHW elevation and 1 ft
   thickness of free-draining material between OHW and DHW elevations for the
   prevention of hydrostatic pressure build up behind the wall due to drawdown
   conditions.
Example Approved List:
   Master List (MSES Portion)




                                        Reinforced Height    Abutment
             Wall System
                                              Range         Applications
                           Hyperlinks
Hyperlinks
Example Approved List:
Master List (PWS & MSWS Portion)




                                        Reinforced Height    Abutment
             Wall System
                           Hyperlinks         Range         Applications
Hyperlinks
Design Procedure
 Designer Determines
  Need for Fill Wall                GEB
                                  Provides
                  Yes              Design
     GRSS                          Details
     Wall?                                       Design Elements
                                                and Specifications
         No                            No       incorporated into
                          Need for                   Contract
                         Additional                Documents
 Lines, Grades,          Aesthetic
Elevations, and         Treatment?
Special Notes
    Shown in                          Vividly Describe Aesthetic
    Contract                                  Treatments
                            Yes       •Industry-Standard Descriptions
  Documents.                              (Color, Texture, Pattern)
                                               •Special Notes
                                              •Special Details
Construction Process                             Plans Depict
                                                   Fill Wall

               Plans Depict
                GRSS Wall
                                             Contractor Chooses
                                              Wall System from
                                               Approved List



             Contractor Submits              Contractor Submits
               Geosynthetic                 Design and Details of
               Certifications                Proprietary System


No Change                     Submittal
in Process                    Approval


                        Wall Construction
                       Conclusion
   Merging the specifications does several
    things:
       Conformance with Competitive Bidding, provided under 23
        CFR 635.411(a)(1) by identifying as many acceptable
        products as possible.
       Separates the cost of the wall function from the cost of the
        wall aesthetics.
       Eliminates bias in selection of wall type.
       Eliminates the State losing potential cost savings to VE
        proposals.
       Eliminates the problem of the designer sometimes specifying
        proprietary wall systems, and then needing a spec and a
        “back-justification”.
   Where special requirements warrant, create and
    justify a special spec.
                        Conclusion
   No change in the basic role of the RGE.
    ◦ In lieu of selecting a single wall type, describe the conditions,
      requirements and limitations of the site on the plans.
   More onus on the RLA.
    ◦ Need to vividly describe the desired aesthetic treatment on the
      plans using generic terms.
   Project Managers need to broaden their
    presentations of wall types
    ◦ Need to become familiar with the available categories (textured
      surface, exposed aggregate finish, architectural pattern) for
      presentations to communities. While negotiating a “look”, the
      PM should avoid promising the use of a specific type of wall.

								
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