Drilled shaft foundations as well as retaining walls such as tangent and secant pile walls typically have a verticality requirement as part of the specifications. These requirements ensure that the moments and stresses in the shaft are consistent with the design, and in the case of the retaining walls, ensure that there are no gaps in the wall. Ben White and Patrick Hannigan have a nice article in the latest Pile Dynamics newsletter describing the verticality recommendations/requirements from several different entities around the world and also explaining the capabilities of their SHAPE® instrument. You can subscribe to future Pile Dynamics newsletters here.
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Drilled Shaft Industry Notes
In the May 2007 edition of Foundation Drilling Magazine, a publication of the Association of Drilled Shaft Contractors (ADSC), Silas Nichols, PE of the Federal Highway Administraton provided a summary of the FHWA’s role in providing guidance on drilled shaft design and construction over the years through research funding, publications and involvement in AASHTO and other agencies. Also in the article is an overview of upcoming updates to AASHTO codes, and FHWA publications. Read on for more details.
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