Tag Archives: Synthesis Report

NCHRP Synthesis 547 – Advancements in Use of Geophysical Methods for Transportation Projects

The Transportation Research Board (TRB) has released a synthesis report prepared by Brent L. Rosenblad and Andrew Z. Boeckmann (Andy is now with DBA) on geophysical methods for transportation projects: NCHRP Synthesis 547, Advancements in Use of Geophysical Methods for Transportation Projects.  The report is an updated summary of the state of practice with regard to geophysical methods in the transportation industry and includes a matrix of geophysical methods and applications. They conducted a survey of state DOTs and selected frequent users of geophysics to analyze “the common use methods and applications, challenges, and lessons learned.”

You can download a PDF of the report or purchase a hard copy at the link below.

Rosenblad, B.L. and Boeckmann, A.Z. (2020). NCHRP Synthesis 547, Advancements in Use of Geophysical Methods for Transportation Projects, Transportation Research Board, National Academies, Washington, D.C.

NCHRP Synthesis 478 – Design and Load Testing of Large Diameter Open-Ended Driven Piles

nchrp_syn_478_Design and Load Testing of Large Diameter Open-Ended Driven Piles_2015

The Transportation Research Board (TRB) has released a synthesis report prepared by Dan and Robert on large diameter piles: NCHRP Synthesis 478, Design and Load Testing of Large Diameter Open-Ended Driven Piles.  The report is a summary of the state of practice with regard to Large Diameter Open-Ended Piles (LDOEPs) in the transportation industry.  We conducted a survey of state DOTs as well as interviews with private practitioners to summarize current practices as well as recommend best practices with regard to the selection, design, installation, and testing of LDOEPs.   Several state DOTs are using LDOEPs more regularly where large foundation loads may exist and/or the piles are subject to significant unsupported length due to scour, liquefaction, or very weak surficial soils. Marine construction conditions also favor the use of these piles, particularly where pile bents might be employed to eliminate footings.

You can download a PDF of the report or purchase a hard copy at the link below.

Brown, D.A. and Thompson, W.R. (2015). NCHRP Synthesis 478, Design and Load Testing of Large Diameter Open-Ended Driven Piles, Transportation Research Board, National Academies, Washington, D.C.