FUTURE GEOTECHNICAL VISIONS RESEARCH AND PRACTICE FHWA STRATEGIC - PowerPoint PPT Presentation

FUTURE GEOTECHNICAL VISIONS – RESEARCH AND PRACTICE

FHWA STRATEGIC PLANNING Strategic Planning/Roadmap  Roadmap informs the annual Policy & Geotechnical Spending Plan Guidance for FHWA  Roadmap is reviewed and updated on an annual basis Training & Technical Research  Roadmap is informed Deployment through feedback from State DOTs, FHWA Division offices, industry, and academia

CURRENT GEOTECHNICAL FOCUS AREAS (2016 ROADMAP)  Extreme Events, Geohazards and Sustainable Geotechnics  Performance Management  Reliability Based Design and Construction  Advanced Geotechnical Modeling  Alternative Delivery Methods  Design and Construction Optimization  Site Characterization  Quality Assurance

IMPACTS ON AASHTO Bridge Design and Construction Specifications:  Mechanically Stabilized Earth (MSE) Walls  Research effort on LEM for geosynthetics (FHWA-HIF-17-004)  Research and EDC implementation of GRS-IBS  Drilled Shafts  Update to GEC-10 – Drilled Shafts (FHWA-NHI-18-024)  Research effort on Post Grouting of Drilled Shafts (FHWA-HIF-17-024)  Shallow Foundations  SHRP2 research and implementation on foundation deformations  Soil Nail Walls  Development of GEC-7 – Soil Nail Walls (FHWA-NHI-14-007)  Soil Nail Wall Parametric study on software applications

IMPACTS ON AASHTO Materials Specifications:  DIGGS –Test Standards  Development of software (DiggIT) to collect and archive geotechnical test data  Development of outreach and training materials to support DIGGS implementation  Subsurface Investigation Manual  Update of GEC-5 – Geotechnical Site Characterization

IMPACTS ON GEOTECHNICAL PRACTICE Industry Partnerships to Deploy and Implement:  DIGGS  Support for development of DIGGS infrastructure (Pooled-Fund Study)  www.geoinstitute.org/special-projects/diggs  GeoTechTools  SHRP2 R02 project development  www.geotechtools.geoinstitute.org  IDEA  Develpment of protocol and electronic tracking system  www.geoinstitute.org/special-projects/idea

IMPACTS ON GEOTECHNICAL PRACTICE Additional Significant Developments:  GRS-IBS (Multiple publications)  Rapid Repair of Bridge Foundations (FHWA-HIF-17-044)  Design Guidance – Geotechnical Engineering Circulars (GECs):  GEC-9 - Lateral Loads on Deep Foundations (FHWA-HIF-18-031)  GEC-12 – Driven Piles (FHWA-NHI-16-009, FHWA-NHI-16-010, AND FHWA-NHI-16-069)  GEC-13 – Ground Modification Methods (FHWA-NHI-16-027 and FHWA-NHI-16-028)  GEC-14 – QA in Geotechnical Reporting (FHWA-HIF-17-016)

UPDATED FOCUS AREAS (2020 ROADMAP)  Innovations in Geotechnical Design and Construction Methods  Advanced Site Charaterization  Geotechnical Asset and Performance Management  Geotechnics of Scour  Geotechnical Aspects of Pavement  Geotechnical Deployment and Implementation

INNOVATIONS IN GEOTECHNICAL DESIGN AND CONSTRUCTION METHODS Rapid evolution of the foundation construction industry to construct significantly larger and deeper foundations. FHWA addressing issues related to this industry trend:  Recently completed developments on LDOE piles, PGDS, service limit state calibration (SHRP2 R-19B), and guidance on design for lateral loading on deep foundations (GEC-9)  Construction means and methods for constructing large diameter foundation elements  Optimization of load transfer in drilled shafts (how to implement)  Control of materials (guidance and specifications for tremie concrete and high strength steel)  Acceptance requirements and procedures for large diameter foundation elements (GEC-15) Continued NGT work to address governance for evolving foundation industry

ADVANCED SITE CHARACTERIZATION  EDC-5: Advanced Geotechical Methods for Exploration (The A- GaME)  Development of GEC-5: Geotechnical Site Characterization  Development of NHI 132031 – Geotechnical Site Characterization  AASHTO Coordination –  Subsurface Investigation Manual  Re-write of Article 10.4 – LFRD Bridge Design Specifications NGT work toward a paradigm shift in how risk in site characterization is addressed as part of project delivery

GEOTECHNICAL ASSET AND PERFORMANCE MANAGEMENT Recently completed developments supporting GAM  NCHRP 24-46 GAM Implementation Manual  Risk-Based Protocol for MSE Walls  Unstable Slope Management Protocol  Geohazards Framework  DIGGS Implementation NGT developing an implementation strategy for GAM that considers performance expectations for asset classes, and protocols for advanced decision making in program delivery

GEOTECHNICS OF SCOUR Development of a geotechnical strategic for NextScour:  2018 Geotechnical Scour Workshop  Geotechnical Evaluation of New Scour Tools  ISTD  Lab Testing NGT developing a long-term research strategy to address scour as a complex geotechnical soil-structure interaction problem. Develop models for soil erosion/failure due to various load effects developed by water flow

GEOTECHNICAL ASPECTS OF PAVEMENT Geotechnical contributions to pavement design and construction including:  Geotechnical Aspects of Pavements (GAP) conference – November 2019  Coordination with Pavements office NGT working toward a formal plan for identifying and addressing geotechnical issues impacting pavement design and construction

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