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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.
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.
Introduction and research approach -- Findings -- Interpretation, appraisal, and applications -- Conclusions and suggested research -- Bibliography -- Appendixes.
This book presents articles covering a wide spectrum of topics in geotechnical engineering, including properties of soils, unsaturated soil mechanics, ground improvement, liquefaction and seismic studies, soil-structure interaction and stability analysis of man-made and natural slopes. The contributing authors are renowned researchers in their respective fields, which include soft ground improvement, seismic response of retaining structure using soil-structure Interaction (SSI) principles, and unsaturated soils. Based on keynote addresses and invited talks presented at the Indian Geotechnical Conference 2016, this book will prove a valuable resource for practicing engineers and researchers in the field of geotechnical engineering.
The ground is one of the most highly variable of engineering materials. It is therefore not surprising that geotechnical designs depend on local site conditions and local engineering experience. Engineering practices, relating to investigation and design methods site understanding and to safety levels acceptable to society, will therefore vary between different regions.The challenge in geotechnical engineering is to make use of worldwide geotechnical experience, established over many years, to aid in the development and harmonization of geotechnical design codes. Given the significant uncertainties involved, empiricism and engineering
Communication of risks within a transparent and accountable framework is essential in view of increasing mobility and the complexity of the modern society and the field of geotechnical engineering does not form an exception. As a result, modern risk assessment and management are required in all aspects of geotechnical issues, such as planning, desi
GEOTECHNICAL ENGINEERING While there are many textbooks on the market that cover geotechnical engineering basics, Geotechnical Engineering is unique in that it is the only textbook available that is rooted within the three phase unsaturated soil mechanics framework. Written by world-renowned, award-winning geotechnical engineering expert Dr. Jean-Louis Briaud, this Second Edition offers the most comprehensive coverage of geotechnical engineering topics on the market, from theory to real-world application. In addition to many updates and revisions, a major chapter has been added, covering 22 geo-engineering case histories. They are: Washington Monument (shallow mat foundation) Rissa Landslide (slope stability) Seattle 46 M-High MSE Wall (retaining wall) The New Orleans Charity Hospital Foundation (deep foundation) The Eurotunnel Linking France and England (tunnel) The Teton Dam (earth dam erosion) The Woodrow Wilson Bridge (bridge scour) San Jacinto Monument (shallow mat foundation) Pointe du Hoc Cliffs (rock erosion) The Tower of PISA (shallow foundation) The Transcona Silo (shallow foundation) The Saint John River Bridge Abutment (slope stability) Foundation of Briaud’s House (shrink swell soils) The Eiffel Tower (deep foundation) St. Isaac Cathedral (mat foundation) National Geotechnical Experimentation Sites at Texas A&M University (full scale infrastructure tests) The 827 M-High Burj Khalifa Tower Foundation (combined pile raft foundation) New Orleans Levees and Katrina Hurricane (overtopping erosion) Three Gorges Dam (concrete dam) The Kansai International Airport (earth fill in the sea) The Panama Canal (excavated slopes) The Nice Airport Slope Failure (slope stability) From site investigation and geophysics to earthquake engineering and deep foundations, Geotechnical Engineering is an ideal resource for upper-level undergraduate and graduate courses, as well as practicing professionals in geotechnical engineering and soil mechanics.