The FHWA is partnering with a virtual who’s-who of geotechnical engineers and contractors specializing in drilled shafts and grouting to perform a research project on post-grouting (aka base-grouting or tip-grouting) of drilled shafts. More details can be found at Dan Brown and Associates Blog (Dan Brown is one of the three Co-Principal Investigators). The results of the study are expected to be released sometime in 2014. [Source: Dan Brown and Associates, PC. Image: Dan Brown and Associates]
Related Articles
NY Landslide Halts Highway Construction
A report has been released by the NYSDOT on the Scoby Hill Landslide which has impacted a 4.2-mi improvement project of Route 219. The report, dated May 20, 2008 was headed to an FHWA peer review panel.
The Feds were call in to help because of the unusual nature of the landslide. The slip surface is very deep, approximately 30-m (100-ft) below the surface and below all of the design phase investigations. And the remolded shear strength of the silty clay forming the slip surface was only 12-14 degrees.
Read on for more details of the slide. (Photo by NYSDOT)
Polyurethane Grout Curtains Solve Seepage Problems
Two recent projects using TerraThane™ geotechnical polyurethane grout were successful in solving seepage problems. TerraThane™ is a two-part geotechnical polymer that when mixed at the injection location, expands to many times its initial volume and […]
New FHWA Mechanically Stabilized Earth Retaining Wall (MSE Wall) Manual
The much anticipated LRFD update to the MSE Wall and Reinforced Soil Slope Manual is now available for download from the FHWA’s website. The full title of the document is Design of Mechanically Stabilized Earth Walls and Reinforced Soil Slopes and it was authored by Ryan R. Berg, P.E.; Barry R. Christopher, Ph.D., P.E. and Naresh C. Samtani, Ph.D., P.E. Find the abstract and download link below. As time permits, I’ll try to post more about some of the changes in this important geotechnical publication.