United States Department of Transportation
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Geotechnical Engineering Circular No. 12 Ground Modification Methods - Reference Manual Volume I
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2016-12-01
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[PDF-39.47 KB]
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Abstract:This document provides guidance on Ground Modification Methods, and also serves as the reference manual for FHWA NHI courses No. 132034, 132034A, and 132034B on Ground Modification Methods. The purpose of this manual is to introduce available ground modification methods and applications to design generalists, design specialists, construction engineers, and specification and contracting specialists involved with projects having problematic site conditions. An introductory chapter provides a description, history, functions, and categories of ground modification. A description of the web-based GeoTechTools (http://www.geotechtools.org) technology selection guidance system and geotechnology catalog is also provided in the first chapter. The introductory chapter is followed by stand-alone technical category chapters. Each category chapter includes a broad introduction to the technical category including typical applications, a listing of common technologies used in the U.S., and summaries for specific technologies in the category. Each technology summary includes: description; advantages and limitations; applicability; complementary technologies; construction methods and materials; photographs; design guidance; quality assurance methods; costs; specifications; and reference list. Each technical category and the technology summaries therein reflect current practice in design, construction, contracting methods, and quality procedures. This publication was prepared with the practicing transportation specialist in mind and with the benefit of extensive industry review. Volume 1 chapters include: Vertical drains and accelerated consolidation; Lightweight fills; Deep compaction; and Aggregate Columns.
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