Underwater Bridge Inspection Programs PDF Download
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Languages : en
Pages : 0
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Author: Daniel D. McGeehan
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 17
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The Transportation Research Board workshop on Underwater Inspection Programs revealed surprising agreement among the representatives of federal and state agencies and underwater inspection professionals. The importance of complying with the federal inspection standards to examine all bridges in water at least every five years was emphasized. Advantages of effective underwater inspection programs include cost effectiveness, liability protection, and identification of factors contributing to bridge deterioration. Establishing a program requires an accurate inventory of bridges with underwater elements, a baseline inspection of all structures, and a prioritizing system for the bridge inspection sequence.
Author: George Hearn
Publisher: Transportation Research Board
ISBN: 0309097959
Category : Bridges
Languages : en
Pages : 209
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This synthesis reports bridge inspection practices in the United States and selected foreign countries. The synthesis is a collection of information on formal inspection practices of departments of transportation (DOTs). These are primarily visual inspections and they provide data to bridge registries and databases. For U.S. inspection practices, this synthesis reports on inspection personnel, inspection types, and inspection quality control and quality assurance. Staff titles and functions in inspection programs are reported, together with qualifications and training of personnel, formation of inspection teams, and assignment of teams to bridges. Inspection types are described in terms of their scope, methods, and intervals. Quality control and quality assurance programs are reviewed in terms of the procedures employed, staff involved, quality measurements obtained, and the use of quality findings in DOT inspection programs. Foreign practices are presented in the same organization of inspection personnel, types, and quality programs. Comparisons of U.S. and foreign inspection practices are included. Information was obtained from a questionnaire sent to U.S. state transportation departments, similar questionnaires modified individually for transportation agencies in selected foreign countries, and formal documents used by transportation departments and agencies. These documents primarily included bridge inspection manuals, inspection training manuals, and technical memoranda, but also included blank forms for inspections, DOTs job descriptions for inspectors, and descriptions of inspection training courses. Overall, this synthesis includes information from forty U.S. state transportation departments and from roads agencies in eight foreign nations (Denmark, France, Finland, Germany, Norway, South Africa, Sweden, and the United Kingdom). The synthesis also includes, in an appendix, information from a few provincial and municipal transport agencies in Canada.
Author: Terence M. Browne
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages :
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Author:
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Category : Bridges
Languages : en
Pages :
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Author: Thomas J. Collins
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 132
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Author: Daniel D. McGeehan
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 17
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In the last decade, there has been increasing national concern about the adequacy of underwater inspection of bridge substructures. A number of factors have contributed to this concern, in particular the collapse of several major spans, some of which led to loss of life. Substructure failures have been the cause of bridge collapses and the subject of at least five National Transportation Safety Board (NTSB) highway bridge investigations. In at least four instances, deficiencies in the substructure could have been identified by underwater inspection. During this project, 425 bridges in Virginia were identified as requiring underwater inspection. It was concluded that assessments of the type and extent of damage to structures below the waterline prior to inspection are highly inaccurate. Prioritizing bridges for inspections must be based on an established history of underwater inspections. Trends in the deterioration of underwater structures indicate several factors to be considered in developing a priority system for an underwater inspection program. These trends are described, and time intervals for the inspection of bridges with a previous inspection history are suggested.
Author: Daniel D. McGeehan
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 40
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Book Description
State highway and transportation agencies are required to inspect all bridges on the public road system using guidelines established by AASHTO. Procedures for inspecting the superstructures are well known and the expertise to perform them is available within highway and transportation agencies. However, the need to inspect bridge structures in water too deep to allow evaluation from the surface presents most agencies with a difficult technical task. Many states have solved this problem by employing contractors to inspect such substructures. Since procedures for performing these inspections are not standardized, selection of the criteria to be used is left to the contractor. The objective of this study was to identify issues that should be considered when administering an underwater inspection program to be conducted by contractors. The issues include identifying and prioritizing structures for periodic inspection, establishing inspection procedures to be used, selecting a contractor, formatting the contract, and estimating contract costs.
Author: Collins Engineers
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages :
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Author: Collins Engineers
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages :
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