<p><p><h2>Summary of Example Specifications</h2>Three of the reviewed specifications have been selected for inclusion in this report. These documents are representative of typical deep vibrocompaction specifications but should be tailored for project specific details and adjusted to include the recommended details found in the Design Guidance and QC/QA Procedures sections of this report.<br><div class="grayed-title subsection"><strong>Specification Name/Number:</strong> FHWA 2006</div><strong>Reference(s):<br></strong><em>Elias et al. (2006)</em></p><p>The specification contains helpful commentary but is not as complete as other reviewed specifications. The sample specification follows a generic format which is easy to read and understand. Explanatory notes are included throughout the specification. The contractor is responsible for determining the implementation procedure and pattern spacing which satisfies the design criteria.<br>The specifications do not include a section which discusses the in-situ soil conditions or soil parameters. This inhibits the contractors from providing a fair bid. The amount and type of fines in the soil have a significant impact on the usefulness of vibrocompaction. Criteria for acceptable equipment are described. Substitution of proprietary technologies is not permitted. Additionally, the required design methodology is not specified. The specification requires practical and rational construction methods. The specification can be modified to address specific requirements of vibrocompaction projects.<br><div class="grayed-title subsection"><strong>Specification Name/Number:</strong>Guide Specifications for Vibro Compaction</div><strong>Reference(s):<br></strong><em>Hayward Baker, Inc.</em></p><p>The Hayward Baker specification was the most comprehensive vibrocompaction specification reviewed. However, there are many gaps in the specification which require input before this can be considered a complete specification. The sample specification follows a generic format which is easy to read and understand. Explanatory notes are included throughout the specification. The contractor is responsible for selecting the implementation system in order to achieve the specified end result.<br>The gaps in the specification can impair a company’s ability to make a fair bid and favors a company more experienced with the technology. Additionally, neither soil parameters nor the required design methodology are specified. Criteria acceptable equipment are described.</p><p>The specification requires practical and rational construction methods. However, the specification does not cover construction in any detail. The specification can be modified to address specific requirements of vibrocompaction projects.<br><div class="grayed-title subsection"><strong>Specification Name/Number:</strong>Guide Section 02675 Vibrocompaction</div><strong>Reference(s):<br></strong><em>Metropolitan St. Louis Sewer District</em></p><p>The specification was fairly complete but lacks relevant information, for instance, discussion of measurement and payment. The sample specification follows a generic format, which is easy to read and understand. The contractor is responsible for developing a design and selecting implementation methods to achieve the specified end result.<br>The contractor is able to provide a bid without requiring additional information. The contractor has access to the geotechnical investigation report with test boring logs and laboratory test data. Substitution of proprietary technologies is not permitted. Additionally, the required design methodology is not specified. The specification requires practical and rational construction methods.</p></p>