1997PDFTech Reporthttps://www.fhwa.dot.gov/engineering/geotech/pubs/007919.pdfFHWA-HI-97-021DTFH6... more 1997PDFTech Reporthttps://www.fhwa.dot.gov/engineering/geotech/pubs/007919.pdfFHWA-HI-97-021DTFH61-94-C-00104Geological surveyingGeotechnical engineeringFoundationsUnited StatesUnited States. Federal Highway AdministrationMunfakh, GeorgeArman, AraSamtani, N. C.Castelli, R.Parsons, Brinckerhoff, Quade & DouglasWoodward-Clyde ConsultantsNational Highway Institute (U.S.)United States. Federal Highway AdministrationDiMaggio, Jerry A.Munoz, A.Kilian, A.Osborn, PerryMowery, J.Jones, L.Federal Highway AdministrationThe planning, executing and interpreting the results of subsurface exploration of soil and rock for the design and construction of transportation facilities are presented. The geotechnical engineer's role in subsurface investigation, exploration methodologies, equipment types and their suitability to explore for various subsurface conditions and design requirements are discussed. The use of in situ testing and geophysical surveys for subgrade characterization, proper handling, transportation and storage of soil and rock samples, as well as laboratory testing techniques to develop subsurface information is presented. Correlation of soil and rock properties, typical geotechnical reports, and subcontracting for soil and rock exploration also are discussed. Safety guidelines, health and safety procedures, and a list of equipment manufacturers are appended for further reference.79
This paper describes the design, construction, and performance of a soil nail wall system used by... more This paper describes the design, construction, and performance of a soil nail wall system used by the Pima County Department of Transportation (PCDOT) to stabilize and retain two steeply sloping bluffs up to 18 meters high as part of a major road widening and realignment project along River Road, a major arterial roadway in Tucson, Arizona. The use of a soil nail wall system precluded the need to relocate major components of the Altamira Apartments, a luxury apartment complex situated atop the bluff west of an access road (Campaa Drive) leading from River Road to the apartment complex. The impacted components included a large swimming pool, a clubhouse, and a two-story apartment building, all located close to the crest of the slope. Because of the high property values in the area, replacement costs of these components were prohibitive. In addition, the artificial sculpted-rock architectural facing appealed to a citizen's advisory group because of its aesthetics.
Vertical and Horizontal Deformations of Foundations and Embankments, 1994
Results of a detailed analysis to evaluate the potential horizontal and vertical movements of the... more Results of a detailed analysis to evaluate the potential horizontal and vertical movements of the piers of George P. Coleman Bridge, Virginia, in the event of ship impact are presented in this paper. Two-dimensional (2-D) and three-dimensional (3-D) total stress elasto-plastic finite element analyses were conducted. It was found that the 2-D analysis underestimates the resistance of the piers to ship impact. Based on 2-D and 3-D analyses, the paper presents a practical methodology and correlations to help extrapolate the 2-D results to account for 3-D effects.
This paper describes the geotechnical aspects of earth retaining structures in the context of U.S... more This paper describes the geotechnical aspects of earth retaining structures in the context of U.S. transportation practice based on Load and Resistance Factor Design (LRFD) methodology as adopted by the American Association of State Highway and Transportation Officials (AASHTO). The paper provides information on: (1) basic concepts of LRFD; (2) limit states, loads, load factors and resistance factors for earth retaining structures; (3) comparisons with past practice based on allowable stress design (ASD); and (4) considerations for limit state analyses for earth retaining structures in an LRFD framework. Fill and cut walls are addressed.
2006PDFTech Reporthttps://www.fhwa.dot.gov/engineering/geotech/pubs/nhi06088.pdfhttps://www.fhwa.... more 2006PDFTech Reporthttps://www.fhwa.dot.gov/engineering/geotech/pubs/nhi06088.pdfhttps://www.fhwa.dot.gov/engineering/geotech/pubs/nhi689.pdfFHWA-NHI-06-088DTFH61-02-T-63016Soil mechanics--Study and teaching--United States--Handbooks, manuals, etcFoundations--Study and teaching--United States--Handbooks, manuals, etcUnited StatesUnited States. Federal Highway AdministrationSamtani, Naresh C.; Nowatzki, Edward A.Ryan R. Berg & Associates; National Highway Institute (U.S.); United States. Federal Highway AdministrationFederal Highway AdministrationThe Reference Manual for Soils and Foundations course is intended for design and construction professionals involved with the selection, design and construction of geotechnical features for surface transportation facilities. The manual is geared towards practitioners who routinely deal with soils and foundations issues but who may have little theoretical background in soil mechanics or foundation engineering. The manual's content follows a project-oriented approach where the geotechnical aspects of a project are traced from preparation of the boring request through design computation of settlement, allowable footing pressure, etc., to the construction of approach embankments and foundations. Appendix A includes an example bridge project where such an approach is demonstrated. Recommendations are presented on how to layout borings efficiently, how to minimize approach embankment settlement, how to design the most cost-effective pier and abutment foundations, and how to transmit design information properly through plans, specifications, and/or contact with the project engineer so that the project can be constructed efficiently. The objective of this manual is to present recommended methods for the safe, cost-effective design and construction of geotechnical features. Coordination between geotechnical specialists and project team members at all phases of a project is stressed. Readers are encouraged to develop an appreciation of geotechnical activities in all project phases that influence or are influenced by their work.79
This manual is the reference text used for the Federal Highway Administration (FHWA) National Hig... more This manual is the reference text used for the Federal Highway Administration (FHWA) National Highway Institute (NHI) courses No. 132042 and 132043 on Mechanically Stabilized Earth (MSE) Walls and Reinforced Soil Slopes (RSS) and reflects current practice for the design, construction and monitoring of these structures. This manual was prepared to enable the engineer to identify and evaluate potential applications of MSE walls and RSS as an alternative to other construction methods and as a means to solve construction problems. The scope is sufficiently broad to be of value for specifications specialists, construction personnel and contracting personnel responsible for construction inspection, development of material specifications and contracting methods. With the aid of this text, the engineer should be able to properly select, design, specify, monitor and contract for the construction of MSE walls and RSS embankments. The MSE wall design within this manual is based upon Load and Resistance Factor Design (LRFD) procedures. This manual is a revision (to LRFD) and an update to the FHWA NHI-00-043 manual, which was based upon allowable stress design (ASD) procedures. Volume II contains Chapters 8 through 11 and the appendices.
The purpose of this paper is to provide a chronology of the development of the Service Limit Stat... more The purpose of this paper is to provide a chronology of the development of the Service Limit State design process for geotechnical elements that are designed using the reliability-based Load and Resistance Factor Design (LRFD) approach in the Bridge Design Specifications of AASHTO. This chronology will help future researchers to better understand the basis of decisions made by AASHTO, with input from the FHWA, and thus will serve as an important benchmark for future work.
International Journal for Numerical and Analytical Methods in Geomechanics, Apr 1, 1996
Abstract A constitutive model to describe viscoplastic or time-dependent behaviour of interface m... more Abstract A constitutive model to describe viscoplastic or time-dependent behaviour of interface materials is presented. Viscoplastic characteristics of the interface material are modeled based on Perzyna's theory of viscoplasticity and the Hierarchical Single Surface ...
1997PDFTech Reporthttps://www.fhwa.dot.gov/engineering/geotech/pubs/007919.pdfFHWA-HI-97-021DTFH6... more 1997PDFTech Reporthttps://www.fhwa.dot.gov/engineering/geotech/pubs/007919.pdfFHWA-HI-97-021DTFH61-94-C-00104Geological surveyingGeotechnical engineeringFoundationsUnited StatesUnited States. Federal Highway AdministrationMunfakh, GeorgeArman, AraSamtani, N. C.Castelli, R.Parsons, Brinckerhoff, Quade & DouglasWoodward-Clyde ConsultantsNational Highway Institute (U.S.)United States. Federal Highway AdministrationDiMaggio, Jerry A.Munoz, A.Kilian, A.Osborn, PerryMowery, J.Jones, L.Federal Highway AdministrationThe planning, executing and interpreting the results of subsurface exploration of soil and rock for the design and construction of transportation facilities are presented. The geotechnical engineer's role in subsurface investigation, exploration methodologies, equipment types and their suitability to explore for various subsurface conditions and design requirements are discussed. The use of in situ testing and geophysical surveys for subgrade characterization, proper handling, transportation and storage of soil and rock samples, as well as laboratory testing techniques to develop subsurface information is presented. Correlation of soil and rock properties, typical geotechnical reports, and subcontracting for soil and rock exploration also are discussed. Safety guidelines, health and safety procedures, and a list of equipment manufacturers are appended for further reference.79
This paper describes the design, construction, and performance of a soil nail wall system used by... more This paper describes the design, construction, and performance of a soil nail wall system used by the Pima County Department of Transportation (PCDOT) to stabilize and retain two steeply sloping bluffs up to 18 meters high as part of a major road widening and realignment project along River Road, a major arterial roadway in Tucson, Arizona. The use of a soil nail wall system precluded the need to relocate major components of the Altamira Apartments, a luxury apartment complex situated atop the bluff west of an access road (Campaa Drive) leading from River Road to the apartment complex. The impacted components included a large swimming pool, a clubhouse, and a two-story apartment building, all located close to the crest of the slope. Because of the high property values in the area, replacement costs of these components were prohibitive. In addition, the artificial sculpted-rock architectural facing appealed to a citizen's advisory group because of its aesthetics.
Vertical and Horizontal Deformations of Foundations and Embankments, 1994
Results of a detailed analysis to evaluate the potential horizontal and vertical movements of the... more Results of a detailed analysis to evaluate the potential horizontal and vertical movements of the piers of George P. Coleman Bridge, Virginia, in the event of ship impact are presented in this paper. Two-dimensional (2-D) and three-dimensional (3-D) total stress elasto-plastic finite element analyses were conducted. It was found that the 2-D analysis underestimates the resistance of the piers to ship impact. Based on 2-D and 3-D analyses, the paper presents a practical methodology and correlations to help extrapolate the 2-D results to account for 3-D effects.
This paper describes the geotechnical aspects of earth retaining structures in the context of U.S... more This paper describes the geotechnical aspects of earth retaining structures in the context of U.S. transportation practice based on Load and Resistance Factor Design (LRFD) methodology as adopted by the American Association of State Highway and Transportation Officials (AASHTO). The paper provides information on: (1) basic concepts of LRFD; (2) limit states, loads, load factors and resistance factors for earth retaining structures; (3) comparisons with past practice based on allowable stress design (ASD); and (4) considerations for limit state analyses for earth retaining structures in an LRFD framework. Fill and cut walls are addressed.
2006PDFTech Reporthttps://www.fhwa.dot.gov/engineering/geotech/pubs/nhi06088.pdfhttps://www.fhwa.... more 2006PDFTech Reporthttps://www.fhwa.dot.gov/engineering/geotech/pubs/nhi06088.pdfhttps://www.fhwa.dot.gov/engineering/geotech/pubs/nhi689.pdfFHWA-NHI-06-088DTFH61-02-T-63016Soil mechanics--Study and teaching--United States--Handbooks, manuals, etcFoundations--Study and teaching--United States--Handbooks, manuals, etcUnited StatesUnited States. Federal Highway AdministrationSamtani, Naresh C.; Nowatzki, Edward A.Ryan R. Berg & Associates; National Highway Institute (U.S.); United States. Federal Highway AdministrationFederal Highway AdministrationThe Reference Manual for Soils and Foundations course is intended for design and construction professionals involved with the selection, design and construction of geotechnical features for surface transportation facilities. The manual is geared towards practitioners who routinely deal with soils and foundations issues but who may have little theoretical background in soil mechanics or foundation engineering. The manual's content follows a project-oriented approach where the geotechnical aspects of a project are traced from preparation of the boring request through design computation of settlement, allowable footing pressure, etc., to the construction of approach embankments and foundations. Appendix A includes an example bridge project where such an approach is demonstrated. Recommendations are presented on how to layout borings efficiently, how to minimize approach embankment settlement, how to design the most cost-effective pier and abutment foundations, and how to transmit design information properly through plans, specifications, and/or contact with the project engineer so that the project can be constructed efficiently. The objective of this manual is to present recommended methods for the safe, cost-effective design and construction of geotechnical features. Coordination between geotechnical specialists and project team members at all phases of a project is stressed. Readers are encouraged to develop an appreciation of geotechnical activities in all project phases that influence or are influenced by their work.79
This manual is the reference text used for the Federal Highway Administration (FHWA) National Hig... more This manual is the reference text used for the Federal Highway Administration (FHWA) National Highway Institute (NHI) courses No. 132042 and 132043 on Mechanically Stabilized Earth (MSE) Walls and Reinforced Soil Slopes (RSS) and reflects current practice for the design, construction and monitoring of these structures. This manual was prepared to enable the engineer to identify and evaluate potential applications of MSE walls and RSS as an alternative to other construction methods and as a means to solve construction problems. The scope is sufficiently broad to be of value for specifications specialists, construction personnel and contracting personnel responsible for construction inspection, development of material specifications and contracting methods. With the aid of this text, the engineer should be able to properly select, design, specify, monitor and contract for the construction of MSE walls and RSS embankments. The MSE wall design within this manual is based upon Load and Resistance Factor Design (LRFD) procedures. This manual is a revision (to LRFD) and an update to the FHWA NHI-00-043 manual, which was based upon allowable stress design (ASD) procedures. Volume II contains Chapters 8 through 11 and the appendices.
The purpose of this paper is to provide a chronology of the development of the Service Limit Stat... more The purpose of this paper is to provide a chronology of the development of the Service Limit State design process for geotechnical elements that are designed using the reliability-based Load and Resistance Factor Design (LRFD) approach in the Bridge Design Specifications of AASHTO. This chronology will help future researchers to better understand the basis of decisions made by AASHTO, with input from the FHWA, and thus will serve as an important benchmark for future work.
International Journal for Numerical and Analytical Methods in Geomechanics, Apr 1, 1996
Abstract A constitutive model to describe viscoplastic or time-dependent behaviour of interface m... more Abstract A constitutive model to describe viscoplastic or time-dependent behaviour of interface materials is presented. Viscoplastic characteristics of the interface material are modeled based on Perzyna's theory of viscoplasticity and the Hierarchical Single Surface ...
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