The current edition of the AASHTO LRFD Bridge Design and Construction specifications do not have specifications for soil nail retaining walls. This TRB publication is meant to be an interim solution for agencies who still wish to take advantage of the advantages of soil nail retaining walls for certain situations. [Source: TRB. Image: TRB]
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ADSC Joins with FHWA to Conduct Hollow Core Soil Nail Research
The ADSC [Editor] (Association of Drilled Shaft Contractors) [/Editor] will join the FHWA as co-sponsors of a research project to develop a database of the available grout-to-ground bond stress of Hollow Core Anchors (HCAs) and to determine if correlations exist with traditional solid bar, drill and grout soil nails. The FHWA and the ADSC are interested in documenting the performance of HCAs in soil nail wall type construction and identifying methods of quality assurance so that HCAs can be specified with confidence in appropriate applications, both temporary and permanent. [Editor] Photo of hollow core nail installation underneath an existing bridge abutment, courtesy of NCS Consultants, LLC. Read on for the rest of the release. [/Editor]