Civil Engineering (The Magazine of the American Society of Civil Engineers)
April 2008 Vol. 78, No. 4
Contents
Features
42 Unconventional Expansion
By Steven C. Ball, P. E., S. E., LEED AP
Thanks to an inventive collaborative approach that assigned key personnel to a centralized project center and a concerted effore to reduce material costs, Chicago’s new McCormick Place West Building was delivered under budget and ahead of schedule.
54 Ground Improvement Technologies for a Sustainable World
By Charles Spaulding, P. E., M. ASCE, Frederic Masse, M. ASCE, and Justin LaBrozzi, M. ASCE
Three recent case studies reveal that using ground improvement techniques rether than constructing deep foundations can solve problems, lower costs, and reduce greenhouse gas emissions.
60 Dual Deconstruction
By Sarbjeet Singh, Ph. D., A. M. ASCE, Mehrdad Mirzakashani, P. E., M. ASCE, and Abdol Hagh, Ph. D., P. E., M. ASCE
What do engineers do with two functionally obsolete bridges after their replacement structure has been completes? In Charleston, South Carolina, the answer involved a carefully planned and executed deconstruction project that relied on both conventional methods and specialized techniques to dismantle the Grace Memorial and Silas N. Pearman Bridges, a pair of side-by-side through truss structures that once crossed a major navigation channel.
68 Moving at the Speed of Steel
By Juan A. Sobrino, D. Eng., M. ASCE
Because they must support significant loads and meet strict technical criteria, two new bridges in spain for high-speed trains employ structural elements that are much stiffer than what is normally required for vehicular bridges. To achive cost-effective solutions, the designers relied on the optimal use of materials, carefully selected structural systems, and very slender decks.
Departments
8 Letters
12 Polity Briefing
14 Civil Engineering News
Market forecast
Tilting tower
Underwater electricity
Butterfly museum
Mitigation bank
Wind catcher
River remediation
Lock replacement
Everglades revisited
News Briefs
36 Technology
38 History Lesson
41 Editor’s Note
76 Books
92 The Law
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