The Concept of a Baseline
This section discusses baselines, including contractual assumptions about baseline statements and where to set the baseline....
Preparation of a Geotechnical Baseline Report
This section discusses the preparation of a geotechnical baseline report. Topics include organization and content, writing the GBR, wording suggestions, and consistency and compatibility....
Applications for Other Excavations and Foundations
This section discusses the application of GBRs for other excavations and foundations projects, projects involving construction operations other than tunneling....
Design-Build Procurement
This section addresses suggested means for reaching agreement between owner and DB team on the definition of expected geotechnical conditions....
Owner Perspectives
This section discusses owner perspectives. Topics include realities in the public sector, setting the baseline, and managing the owner's risk....
Roles and Responsibilities
This section summarizes the roles and responsibilities of the parties involved: owner, design team, contractor, construction manager, and dispute adjudicators....
Lessons Learned
This chapter discusses feedback obtained during two industry workshops that were specifically directed at capturing lessons learned. The first workshop, held in association with a national...
Introduction
This chapter contains an introduction to the report....
New Orleans
This chapter provides a brief overview of New Orleans....
Hurricane Katrina
This chapter provides an overview of Hurricane Katrina, including data on its category, its path and intensity, and its effect on wind and water forces....
Hurricane Protection System
This chapter discusses hurricane protection systems. Topics include standard project hurricane, levees and floodwalls, datums and elevations, and interior drainage and pump stations....
The Levees Fail
This chapter examines the failure of levees against storm forces and the flooding that ensued....
Consequences
This chapter examines the impact of Hurricane Katrina, including injury, death, and financial losses....
Direct Causes of the Catastrophe
This chapter examines direct physical causes of the hurricane protection system failures, including soil strength assessments and pumping station limitations....
Contributing Factors
This chapter examines contributing factors of the hurricane protection system failures, including the underappreciated risk to New Orleans, a piecemeal implementation of the hurricane...
What Must We Do Next?
This chapter discusses important next steps to be taken. 10 calls-to-action are listed....
Calendar: Bridges 2008
Introduction
Permafrost is defined as soil that remains frozen for more than two years. At elevations less than 304.8 m (1000 ft.), it is frequently encountered north of latitude 60. It may also be...
The Need for Geotechnical Investigation
Knowledge of the subsurface conditions is needed to decide which type of foundation to use. In the discontinuous permafrost zone, some generalizations may be made about the location of...
Structurally Enhanced Foundations: A Functional Solution to Thaw Strain in Frozen Sand and Gravel
Some building sites with perennially frozen soil profiles are developed using nonelevated, conventional-appearing foundation systems. These sites consist of frozen sands and gravels and...
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