Challenges in Drinking Water Distribution Systems Security Modeling
This paper is on challenges in drinking water distribution systems security modeling connected to OCMS, addressing research and practical issues coming-out from two recent activities which...
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...
Post and Pad
As the name implies, this type of foundation consists of a concrete or wood pad placed on or buried in the ground. It is the lowest priced option for buildings on frozen silt, which may...
Adjustable Foundation Design Development Innovations in Arctic Engineering
The purpose of adjustable foundation systems is to accommodate a wide variety of soils, including those which have low bearing capacity or which may be subject to settlement and/or horizontal...
Marginal Permafrost a Foundation Material in Transition
At the edges of the world's cold regions lie areas of marginal permafrost. It is a changing landscape that seems to be growing in extent, yet it retains chameleon-like qualities...
Some Case Histories of Pile Foundations in Permafrost
Foundations for permafrost conditions should conform to one of three basic design principles: keep it frozen, let it thaw, or thaw the ground before construction. To keep the permafrost...
Refrigerated Foundations
Refrigeration systems used to cool foundations on frozen ground can be classified as either active or passive, depending on whether external energy is used to power the systems. If pumps,...
Introduction
This section contains an introduction for the report, including remarks on its purpose and scope....
Background
This section contains background information on the geotechnical report....
Geotechnical Reports
This section discusses the geotechnical data report, geotechnical memoranda for design, and the geotechnical baseline report....
Differing Site Conditions Clause
<p>This section discusses the Differing Site Conditions (DSC) clause, including an example of the standard clause and modifications to the Federal DSC.</p>...
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...
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