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Further Use Of Spread Footing Foundations For Highway Bridges
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Book Synopsis Further Use of Spread Footing Foundations for Highway Bridges by : Shad M. Sargand
Download or read book Further Use of Spread Footing Foundations for Highway Bridges written by Shad M. Sargand and published by . This book was released on 2006 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spread footing foundations have been used to support various types of civil engineering structures over the years. However, one type of structure to which they have not seen much widespread application is highway bridges. This is because bridge engineers generally take a rather conservative approach and specify deep foundations, such as H-piles and drilled pier shafts, to support the bridge superstructure weight and live loads. In the current research project, the ORITE team continued to investigate several technical aspects related to spread footing foundations. Four additional spread footings constructed at two interstate highway construction sites were instrumented with modern sensors and monitored through construction stages and beyond. The spread footing design methods presented in the AASHTO LRFD Bridge Design Specifications (2004) were validated on the basis of the field performance data accumulated during the ORITE research project(s). Twelve SPT-based settlement prediction methods (for footings resting on cohesionless or slightly cohesive soils) were evaluated in light of the field performance data. General performance analysis of spread footing foundations at bridge construction sites was made to draw some guidelines concerning the use of spread footings for supporting highway bridge structures. Finally, detailed cost comparisons were made between spread footing and pile foundation options. Overall, the results of the research project indicated that: 1) spread footing can be a viable option as the highway bridge foundation; and 2) the design methods presented in the AASHTO LRFD Bridge Design Specifications (2004) appear to be satisfactory.
Book Synopsis Selection of Spread Footings on Soils to Support Highway Bridge Structures by : Naresh C. Samtani
Download or read book Selection of Spread Footings on Soils to Support Highway Bridge Structures written by Naresh C. Samtani and published by . This book was released on 2010 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: The FHWA believes that spread footings on soils are underutilized because designers encounter one or more of the following obstacles: (a) limited knowledge of AASHTO/FHWA technical references that pertain to spread footings on soils to support bridges; (b) limited knowledge of adequate performance data for spread footings; (c) unrealistic tolerable settlement criteria; (d) overestimation of loads used to calculate settlement; and (e) the use of conservative settlement prediction methods. These obstacles have resulted in institutional biases and overly conservative and excessively costly institutional processes that lead to the unnecessary use of costlier deep foundation systems. The primary goal of this report is to promote the use of spread footings bearing on competent natural soils, improved soils, and engineered fill materials as a routine alternative to deep foundations for support of bridges by addressing the factors identified above. Documented performance data is used to make this case. The report also presents powerful concepts such as construction-point analysis and angular distortions to demonstrate the efficacy of using spread footings. Implementation of these concepts requires only that conventional computations be taken one step further without any requirement for advanced computational skills. The report presents sources of information that agencies and designers can use as references in their project applications. The report contains comprehensive appendices that treat in detail many of the topics discussed in the report. For example, one such appendix provides an introduction to Load and Resistance Factor Design (LRFD) that permits a rational approach to the consideration of spread footings on soils as a feasible alternative to deep foundations.
Book Synopsis Analysis of Spread Footing Foundations as a Highway Bridge Alternative by : Jill L. Meranda
Download or read book Analysis of Spread Footing Foundations as a Highway Bridge Alternative written by Jill L. Meranda and published by . This book was released on 2005 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis the Behavior of Spread Footing for Highway Bridge Foundation by : Sedtha Mahasantipiya
Download or read book Analysis the Behavior of Spread Footing for Highway Bridge Foundation written by Sedtha Mahasantipiya and published by . This book was released on 1995 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spread Footings for Highway Bridges by :
Download or read book Spread Footings for Highway Bridges written by and published by . This book was released on 1987 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A long-term study of the settlement performance of 21 bridge foundations supported on cohesionless soil-sand or silt- was completed to provide a reliable data base for engineering evaluation"--Abstract
Book Synopsis Model Uncertainties in Foundation Design by : Chong Tang
Download or read book Model Uncertainties in Foundation Design written by Chong Tang and published by CRC Press. This book was released on 2021-03-17 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt: Model Uncertainties in Foundation Design is unique in the compilation of the largest and the most diverse load test databases to date, covering many foundation types (shallow foundations, spudcans, driven piles, drilled shafts, rock sockets and helical piles) and a wide range of ground conditions (soil to soft rock). All databases with names prefixed by NUS are available upon request. This book presents a comprehensive evaluation of the model factor mean (bias) and coefficient of variation (COV) for ultimate and serviceability limit state based on these databases. These statistics can be used directly for AASHTO LRFD calibration. Besides load test databases, performance databases for other geo-structures and their model factor statistics are provided. Based on this extensive literature survey, a practical three-tier scheme for classifying the model uncertainty of geo-structures according to the model factor mean and COV is proposed. This empirically grounded scheme can underpin the calibration of resistance factors as a function of the degree of understanding – a concept already adopted in the Canadian Highway Bridge Design Code and being considered for the new draft for Eurocode 7 Part 1 (EN 1997-1:202x). The helical pile research in Chapter 7 was recognised by the 2020 ASCE Norman Medal.
Book Synopsis LRFD Design and Construction of Shallow Foundations for Highway Bridge Structures by :
Download or read book LRFD Design and Construction of Shallow Foundations for Highway Bridge Structures written by and published by Transportation Research Board. This book was released on 2010 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report develops and calibrates procedures and modifies the AASHTO LRFD Bridge Design Specifications, Section 10-Foundations for the Strength Limit State Design of Shallow Foundations. The material in this report will be of immediate interest to bridge engineers and geotechnical engineers involved in the design of shallow foundations.
Book Synopsis Performance of Highway Bridge Abutments on Spread Footings by : Albert F. DiMillio
Download or read book Performance of Highway Bridge Abutments on Spread Footings written by Albert F. DiMillio and published by . This book was released on 1982 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract A visual inspection was made of the structural condition of 148 highway bridges supported by spread footings on compacted fill throughout the State of Washington. The approach pavements and other bridge appurtenances were also inspected for damage or distress that could be attributed to the use of spread footings on compacted fill. This review, in conjunction with detailed investigations of the foundation movement of 28 selected bridges, was used to evaluate the performance of spread footings on compacted fills. It was concluded that spread footings can provide a satisfactory alternative to piles especially when high embankments of good quality borrow materials are constructed over satisfactory foundation soils . None of the bridges investigated displayed any safety problems serious functional distress. All bridges were in good condition and many were found to be in very good condition. In addition to the performance evaluation, cost-effectiveness analyses and tolerable movement correlation studies were made to further substantiate the feasibility of using spread footings in lieu of expensive deep foundation systems. Cost analyses showed spread footings were 50-65 percent cheaper than the a1 ternate choice o f pile foundations. Foundation movement studies showed t h a t these bridges have easily tolerated differential settlements of 1-3 inches (25-75 mm) without serious distress.
Book Synopsis Federally Coordinated Program of Highway Research and Development by : United States. Federal Highway Administration
Download or read book Federally Coordinated Program of Highway Research and Development written by United States. Federal Highway Administration and published by . This book was released on with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Federally Coordinated Program of Highway Research, Development and Technology by :
Download or read book Federally Coordinated Program of Highway Research, Development and Technology written by and published by . This book was released on 1983 with total page 838 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Implementation Guidance for Using Spread Footings on Soils to Support Highway Bridges by : Naser M. Abu-Hejleh
Download or read book Implementation Guidance for Using Spread Footings on Soils to Support Highway Bridges written by Naser M. Abu-Hejleh and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent FHWA national surveys revealed that State Departments of Transportation (DOTs) have safely and economically constructed highway bridges supported on spread footings bearing on competent and improved natural soils as well as engineered granular and MSE fills, and that many State DOTs may be missing an opportunity to save time and costs by not doing so more often. The goal of this report is to promote the consideration and use of spread footings on soils when appropriate to support highway bridges. Initially, perceived obstacles in using spread footings are identified. Then, the report presents recommendations to address these obstacles and a guidance to help State DOTs implementing these recommendations that are centered around: 1) deployment of AASHTO and FHWA technical resources; 2) highlighting practices of State DOTs that actively use spread footings, especially for selection of spread footings; 3) a performance review of bridges constructed with spread footings bearing on soils; and 4) LRFD implementation for spread footings. State DOTs' concerns with spread footings on engineered and MSE fills and with integral abutments are addressed. Consideration of load tests on spread footings, instrumentation programs for bridges with spread footings, and deployment of adequate subsurface investigation and construction programs are recommended. The main concern of State DOTs that do not consider spread footings is excessive settlement of bridges. This report advances a rational procedure for settlement analysis of bridges supported on spread footings bearing on soils. This procedure and the results of the national surveys demonstrate that bridges with spread footings on soil can perform very well with respect to settlement. Development of LRFD design bearing resistances for footings on various types of soils is discussed. Based on the previous recommendations, the report finally provides a technical resource for State DOTs to develop LRFD guidance that would allow selection of spread footings in design when appropriate, and development of accurate and economical design methods for spread footings.
Book Synopsis Federally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1985 by :
Download or read book Federally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1985 written by and published by . This book was released on 1986 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Public Roads written by and published by . This book was released on 1984 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Predicted and Measured Behavior of Five Spread Footings on Sand by : J.-L. Briaud
Download or read book Predicted and Measured Behavior of Five Spread Footings on Sand written by J.-L. Briaud and published by . This book was released on 1994 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains the results of a full scale load testing program used to predict and measure the behaviour of five spread footings on sand. This title presents the data upon which all predictions are based; describes methodologies and judgments used to make the predictions; and also summarizes the predictions and compares predicted responses.
Book Synopsis Nationally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1994 by :
Download or read book Nationally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1994 written by and published by . This book was released on 1995 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Federally Coordinated Program of Research and Development in Highway Transportation: Improved materials utilization and durability by :
Download or read book Federally Coordinated Program of Research and Development in Highway Transportation: Improved materials utilization and durability written by and published by . This book was released on 1980 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Innovative Bridge Design Handbook by : Alessio Pipinato
Download or read book Innovative Bridge Design Handbook written by Alessio Pipinato and published by Elsevier. This book was released on 2021-09-08 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt: Innovative Bridge Design Handbook: Construction, Rehabilitation, and Maintenance, Second Edition, brings together the essentials of bridge engineering across design, assessment, research and construction. Written by an international group of experts, each chapter is divided into two parts: the first covers design issues, while the second presents current research into the innovative design approaches used across the world. This new edition includes new topics such as foot bridges, new materials in bridge engineering and soil-foundation structure interaction. All chapters have been updated to include the latest concepts in design, construction, and maintenance to reduce project cost, increase structural safety, and maximize durability. Code and standard references have been updated. Completely revised and updated with the latest in bridge engineering and design Provides detailed design procedures for specific bridges with solved examples Presents structural analysis including numerical methods (FEM), dynamics, risk and reliability, and innovative structural typologies
