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The purpose of this report is to document Accelerated Bridge Construction (ABC) techniques on IBRD (Innovative Bridge Research and Development) project 102470 for the construction of Bridge N-16-Q on State Highway 69 over Turkey Creek. The project demonstrated faster pier erection by utilizing precast pier caps to eliminate concrete cure time from the critical path in the construction schedule.
The traveling public has no patience for prolonged, high cost construction projects. This puts highway construction contractors under intense pressure to minimize traffic disruptions and construction cost. Actively promoted by the Federal Highway Administration, there are hundreds of accelerated bridge construction (ABC) construction programs in the United States, Europe and Japan. Accelerated Bridge Construction: Best Practices and Techniques provides a wide range of construction techniques, processes and technologies designed to maximize bridge construction or reconstruction operations while minimizing project delays and community disruption. - Describes design methods for accelerated bridge substructure construction; reducing foundation construction time and methods by using pile bents - Explains applications to steel bridges, temporary bridges in place of detours using quick erection and demolition - Covers design-build systems' boon to ABC; development of software; use of fiber reinforced polymer (FRP) - Includes applications to glulam and sawn lumber bridges, precast concrete bridges, precast joints details; use of lightweight aggregate concrete, aluminum and high-performance steel
This document represents the “State of the Practice” with respect to all aspects of accelerated bridge construction (ABC). The intent of this manual is to fill in the gaps left by publication of the previous manuals. The manual covers ABC techniques, project planning and scoping, implementing ABC in a Transportation Agency, prefabricated elements, long-term performance of prefabricated elements, construction and design. The manual can be used by transportation agencies to establish a successful accelerated bridge construction program.
In order to minimize the impact of construction on the traveling public, MDOT utilizes innovative and specialized construction methods such as Accelerated Bridge Construction (ABC). Michigan, like other highway agencies in the region, has several challenges in specifying prefabricated bridge elements and systems (PBES) and accelerated bridge construction (ABC) techniques for bridge replacement projects. Among those challenges, the following are the most common: (1) justification of initial project costs, (2) defining a rational process for selecting ABC over conventional construction, (3) absence of PBES selection guidelines and proven standard and successful designs, (4) absence of constructability evaluation guidelines, and (5) uncertain durability performance of PBES and connections. This research project was initiated with several objectives. They were achieved by (1) synthesizing the state-of-the-art practices, challenges, and lessons learned from the implemented ABC projects, (2) developing a Michigan-specific decision-making platform based on the site specific data to identify the optimal construction alternative between conventional construction and ABC, (3) developing a comprehensive list of connection details and cementitious materials for connections, (4) developing standard deck level longitudinal connection details for typical highway bridges, (5) developing a template of special provisions for grout selection and application procedures, (6) documenting construction procedures, equipment, and implementation limitations, (7) developing a constructability review checklist, and (6) providing recommendations for further research and implementation of PBES based on constructability, maintainability, repairability, and durability.
TRB’s National Cooperative Highway Research Program (NCHRP) Report 698: Application of Accelerated Bridge Construction Connections in Moderate-to-High Seismic Regions evaluates the performance of connection details for bridge members in accelerated bridge construction in medium-to-high seismic regions and offers suggestions for further research.
The memoirs in this book are, in many ways, somewhat different from typical memoirs. The book is arranged topically and not chronologically. It is not a celebration of the individual's life. Rather, it is highly descriptive, colorful, emotional, and honest. The author is sincere, and may have engaged in a self-discovery of his life. He quite bravely, and with pride and understanding, reviews the main facets of his life. The story is told with a depth of feeling that is remarkable.
The greatest wave of communal living in American history crested in the tumultuous 1960s era including the early 1970s. To the fascination and amusement of more decorous citizens, hundreds of thousands of mostly young dreamers set out to build a new culture apart from the established society. Widely believed by the larger public to be sinks of drug-ridden sexual immorality, the communes both intrigued and repelled the American people. The intentional communities of the 1960s era were far more diverse than the stereotype of the hippie commune would suggest. A great many of them were religious in basis, stressing spiritual seeking and disciplined lifestyles. Others were founded on secular visions of a better society. Hundreds of them became so stable that they survive today. This book surveys the broad sweep of this great social yearning from the first portents of a new type of communitarianism in the early 1960s through the waning of the movement in the mid-1970s. Based on more than five hundred interviews conducted for the 60s Communes Project, among other sources, it preserves a colorful and vigorous episode in American history. The book includes an extensive directory of active and non-active communes, complete with dates of origin and dissolution.