Geotechnical Information Practices in Design-Build Projects (2012) / Chapter Skim
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Pages 42-48
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40 CHAPTER FIVE DESIGN-BUILD POST-AWARD DESIGN PROCEDURES INTRODUCTION NCHRP Synthesis 376 (2008) describes the design phase of a DB project as "the phase where the ultimate quality of the constructed facility is quantified through the production of construction documents." A 2004 study of DB quality management stated, "Quality cannot be assumed into the project.
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41 and-true geotechnical engineering design solutions, to the design-builder's design team. It should also build the communications structure to ensure that the designers on the owner's and designer's teams are aware of critical geotechnical information, and to incorporate the constructors in the geotechnical design information exchange to make sure that final designs are constructible and conform to the means and methods assumptions reflected in the price proposal (Ernzen et al.
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42 17 DB guidelines and the 46 solicitation document sampled for the synthesis. It is apparent that the amount of specific geotechnical information required in the agency-developed documents is sparse.
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43 possible WSDOT project personnel should resist the temptation to insert their preferences or solutions into the RFP (WSDOT 2004)
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44 • No formal review before final (release-for-construction) design review, • One review before the final design review, • Multiple reviews prior to the final design review.
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45 The WSDOT approach to the no-review process also clarifies the obligations of both the agency and the designbuilder with regard to delaying construction waiting for design reviews to be completed: WSDOT will not perform an official review that might be interpreted as acceptance or approval of the design, after the acceptance of the proposal…However, construction is not required to wait for Department responses to submittals. The review teams must understand that timely reviews, checking for contract compliance, are in everyone's best interest (WSDOT 2004, italics added)
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46 TABLE 25 DESIGN REVIEW OUTPUT FROM SOLICITATION DOCUMENT CONTENT ANALYSIS Design Review Types DOT < 5 DB Projects DOT > 5 DB Projects Single or Multiple Design Reviews Before Final 5 9 Over-the-Shoulder 1 17 Optional Early Design Reviews 3 12 CONTRACTOR'S PERSPECTIVE The design-builder interviews yielded valuable information regarding the geotechnical design process. Respondents were asked to rate the impact on final geotechnical quality of a number of components to the DB design process.
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