Retaining Walls Track

Retaining Walls
While we are committed to keeping this schedule the same, rooms and times may be subject to change please check the final schedule on site.

Room: Royal Poinciana 3

Session Chair: Hiren Shah | Co-Chair: Vinicius Benjamin

  • Instrumentation of Geosynthetic Reinforced Soil – Integrated Bridge Systems (GRS – IBS)Ashley MacMillan
  • Nonisothermal Response of Reinforcing Geosynthetics in Thermally-active Geotechnical SystemsJohn McCartney
  • Pauto J Facilites, Soil Reinforced WallDiego Otero
  • Case Study: Instrumentation of a Hybrid MSE Wall System With Up To 2 m Vertical Spacing Between ReinforcementsBurak Tanyu
  • Evaluation of Instrumentation of Two Geogrid Reinforced Mechanically Stabilized Earth WallsRagui Wilson-Fahmy
  • What Possibly Could Go Wrong – Stabilization of MSE Slopes in Southeast USMichael Yako

Room: Royal Poinciana 3

Speaker: Prof. Chungsik Yoo

Chungsik YooIn this training lecture, issues with the design approaches of geosynthetic-reinforced soil walls (GRSW) in tiered configurations will be discussed. Both NCMA and FHWA design guidelines, and the discrepancies between them, will be addressed.

The governing failure mechanisms adopted in the guidelines will then be compared with the results of physical and numerical modeling to demonstrate the limitations of the design calculation models adopted in the current design guidelines.

Four design case histories of GRSWs in tiered configurations will be presented. They will highlight inherent differences between the currently available design guidelines; demonstrate the governing failure mechanism that yields the smallest factor of safety is the global failure; and highlight the importance of carrying out the global stability analysis during design.

Finally, two failure cases will then be presented with an intention to highlight the “dos and don’ts” in routine design.

Target Attendants
The lecture will target geotechnical engineers with knowledge of GRSW design as well as graduate students majoring in geotechnical engineering.

Room: Royal Poinciana 3

Session Chair: Robert Lozano | Co-Chair: Dean Sandri

  • TITLEEmerson Ananias
  • Analysis of installation damage tests for LRFD calibration of reinforced soil structuresRichard Bathurst
  • Geogrid Penetrations in MSE Retaining WallsPaul Frankenberger
  • Long term Monitoring of Alkalinity at the Geogrid-Block Interface at a Full Scale Masonry Block Retaining WallGeorge Koerner
  • P-Y Curves for Laterally Loaded Piles in Geosynthetic Stabilized Earth WallsHisham Nofal
  • Evaluation of Passive Soil-Geogrid Load Transfer Mechanisms using Transparent SoilsXin Peng

Room: Royal Poinciana 3

Session Chair: Mike Adams | Co-Chair: Michael Bernardi

  • Case Studies of In-Place Rehabilitation of Failing MSE and H-Pile WallsColby Barrett
  • Minimum Average Roll Value (MARV) – Impact on the Calculation of Long-Term StrengthBeth Wilbanks
  • Geotextile-Reinforced Fill Slope Along a Highway to Canada’s Arctic CoastEarl Marvin De Guzman
  • Behavior of Geosynthetic Reinforced Soil Walls with Poor Quality BackfillsRobert Holtz
  • Design of reinforced piled earth structures under static and variable loadsChristian Moormann
  • Long-Term Performance of Geosynthetic Reinforced Soil Wall – Effect of RainfallChungsik Yoo

Room: Royal Poinciana 3

Speaker: Don Armstrong, P.E.

The National Concrete Masonry Association (NCMA) has recently created a Segmental Retaining Wall (SRW) Best Practices guide for the design, inspection, and construction of this type of retaining walls. For over 25 years, SRWs have proven to be a structurally flexible and cost-effective solution to vertical grade-change needs. During this time there have been significant changes in the state‐of‐knowledge regarding mechanically stabilized earth (MSE) and SRWs, both in terms of design and construction practices. The intent of this presentation is to provide SRW design professionals, specifiers, inspectors, and contractors the benefit of that experience to construct higher performing retaining wall systems. Successful SRW projects require careful design, inspection, and construction to perform as intended, offering long-lasting structures. The guide provides designers, specifiers, inspectors, and contractors a guide covering the best practices the industry has developed. The guide covers standards of practice for:

  • Design – methods, plan requirements, relation to other project professionals
  • Soils – recommended parameters, impacts on performance
  • Materials of Construction – facing units, geosynthetics, drainage materials
  • Drainage – sources of water, above and below grade, and detailing
  • Special Design Situations – tall walls, tiered walls, water applications, seismic, top of wall detailing
  • Construction Practices – methods, tolerances
  • Inspections

This presentation will review the key highlights of the NCMA SRW Best Practices Guide. The focus is how the concepts presented in the guide can be used by specifying engineers, retaining wall design engineers, testing firms, building code officials, and contractors to build successful SRWs, drawing on over 25 years of industry experience.

Room: Royal Poinciana 3

Session Chair: Jay McKelvey | Co-Chair: Victor Pimentel

  • All Rocks Are Not Created Equal: How Lightweight Aggregate Fill Can Enhance GeoStabilization ApplicationsImani Brodie
  • The Design and Construction of a Bridge Approach Embankment Utilizing Mechanically Stabilized Earth Walls with Geogrid Reinforced Pulverized Fuel Ash FillChaido Doulala-Rigby
  • Case study of a MSE crusher wall in PennsylvaniaMarco Isola
  • A Fully Geosynthetic Shored Reinforced Earth WallSoizic Kerfontain
  • High tenacity polyester linear straps in non-standard reinforced soil MSE retaining structures: design method and case studiesGiulia Lugli