Open Access. Powered by Scholars. Published by Universities.®

Geotechnical Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

141 Full-Text Articles 204 Authors 61,516 Downloads 21 Institutions

All Articles in Geotechnical Engineering

Faceted Search

141 full-text articles. Page 1 of 6.

International Conference On Short And Medium Span Bridges, Calgary, July 15-18, 2014, Barry A. Palynchuk PhD, Christophe Deniaud PhD 2014 SelectedWorks

International Conference On Short And Medium Span Bridges, Calgary, July 15-18, 2014, Barry A. Palynchuk Phd, Christophe Deniaud Phd

Barry A. Palynchuk PhD

The Jean River near Wabush, Labrador is crossed by two railways and an access road by twin 6m diameter culverts . They are heavily strutted inside their barrels to counteract some significant shape deformation, and are deemed not suitable to sustain the increased volume of rail traffic serving the development of the Bloom Lake mines. The owner requested the design and construction of a replacement scheme for an additional design life of 20 years with a time sensitive schedule for completion of the work during the 2013 construction season. This VE concept for the design of live load relief spans over ...


Design And Construction Of Rail And Road Live Load Relief Spans Over Existing Culverts, Barry A. Palynchuk PhD, Christophe Deniaud PhD 2014 SelectedWorks

Design And Construction Of Rail And Road Live Load Relief Spans Over Existing Culverts, Barry A. Palynchuk Phd, Christophe Deniaud Phd

Barry A. Palynchuk PhD

DESIGN AND CONSTRUCTION OF RAIL AND ROAD LIVE LOAD RELIEF SPANS OVER EXISTING CULVERTS


Thermal Numerical Analysis Of Vertical Heat Extraction Systems In Landfills, Michael Thomas Onnen 2014 California Polytechnic State University

Thermal Numerical Analysis Of Vertical Heat Extraction Systems In Landfills, Michael Thomas Onnen

Master's Theses and Project Reports

An investigation was conducted to determine the response of landfills to the operation of a vertical ground source heat pump (i.e., heat extraction system, HES). Elevated landfill temperatures, reported various researchers, impact the engineering performance of landfill systems. A numerical model was developed to analyze the influence of vertical HES operation on landfills as a function of climate and operational conditions.

A 1-D model of the vertical profile of a landfill was developed to approximate fluid temperatures in the HES. A 2-D model was then analyzed over a 40 year time period using the approximate fluid temperatures to determine ...


Stability, Erosion, And Morphology Considerations For Sustainable Slope Design, Isaac Andres Jeldes Halty 2014 University of Tennessee, Knoxville

Stability, Erosion, And Morphology Considerations For Sustainable Slope Design, Isaac Andres Jeldes Halty

Doctoral Dissertations

The construction of more natural and sustainable earth slopes requires the consideration of erosion and runoff characteristics as an integral part of the design. These effects not only result in high costs for removal of sediment, but also a profound damage to the ecosystem. In this dissertation, innovative techniques are developed such that more natural appearing slopes can be designed to minimize sediment delivery, while meeting mechanical equilibrium requirements. This was accomplished by: a) examining the fundamental failure modes of slopes built with minimum compaction (FRA) to enhance quick establishment of forest, b) investigating the geomechanical and erosion stability of ...


Finite Difference Modeling Of Surface-~Wave Scattering For Shallow Cavity Detection, Heston Travis Norcott 2014 University of Nevada, Las Vegas

Finite Difference Modeling Of Surface-~Wave Scattering For Shallow Cavity Detection, Heston Travis Norcott

UNLV Theses/Dissertations/Professional Papers/Capstones

Data collection and analysis of scattering of Rayleigh-type surface waves are investigated for locating shallowly buried cavities. Surface-based seismic experiments conducted by others at the University of Nevada, Las Vegas (UNLV) Engineering Geophysics Test Site (EGTS) demonstrate scattering of Rayleigh waves caused by buried empty barrels (essentially air-filled cavities). The interpretation of the data is complicated by factors such as the presence of a high-velocity geologic layer just below the cavity.

This research uses a finite-difference seismic wave propagation code to compute time histories for a model that represents the Engineering Geophysics Test Site. By adding cavities to a background ...


Design And Economic Analysis Of A Geothermal Vertical Coupled Heat Pump System For The University Of Tennessee, Knoxville Campus, Joseph W. Birchfield IV, Will Kester, Jason Cho 2014 University of Tennessee, Knoxville

Design And Economic Analysis Of A Geothermal Vertical Coupled Heat Pump System For The University Of Tennessee, Knoxville Campus, Joseph W. Birchfield Iv, Will Kester, Jason Cho

University of Tennessee Honors Thesis Projects

No abstract provided.


Geotechnical Report For Appalachian Community Health And Disaster Readiness: Interprofessional Practice, Ali Leib 2014 University of Tennessee, Knoxville

Geotechnical Report For Appalachian Community Health And Disaster Readiness: Interprofessional Practice, Ali Leib

University of Tennessee Honors Thesis Projects

No abstract provided.


Characterization Of Inherent And Induced Anisotropy In Granular Materials, Marjan Oboudi 2014 McMaster University

Characterization Of Inherent And Induced Anisotropy In Granular Materials, Marjan Oboudi

Open Access Dissertations and Theses

The main aim of this PhD dissertation is to investigate the inherent and induced anisotropy in granular materials. The study includes both the experimental and theoretical aspects and provides a methodology for characterizing the mechanical response of granular materials that display anisotropy.

The content of this thesis is divided into two main parts. The first part is focused on investigating the mechanical properties of materials with inherent anisotropy. In particular, an experimental program designed to investigate the mechanical properties of Ottawa standard sand (C109), with inherent anisotropy that is generated by the initial densification process, is described. The program involves ...


Drilled Shaft Design & Construction-Integrity Testing Issues, Mir A. Zaheer, David Latka 2014 Purdue University

Drilled Shaft Design & Construction-Integrity Testing Issues, Mir A. Zaheer, David Latka

Purdue Road School

This presentation will provide an overview of the design and construction of drilled shafts in Indiana, including construction monitoring issue, discussion of CSL, PIT and TIP testing, and comparisons with cores taken.


Static And Seismic Performance Of Geosynthetics-Strengthened Pile Foundations, Ahmed M. Taha 2014 Western University

Static And Seismic Performance Of Geosynthetics-Strengthened Pile Foundations, Ahmed M. Taha

University of Western Ontario - Electronic Thesis and Dissertation Repository

Geosynthetic reinforcement in earth structures has been used extensively over the last two decades. Extensive research has been carried out to investigate solutions to enhance the lateral stability of pile foundations. This research is motivated by the need to install piles in sites characterized by soft subsurface soil conditions, and often times, in seismic active areas. This research work explores an innovative use of geosynthetics to enhance the lateral performance of pile foundations. The static and seismic soil-structure-interaction behaviors of geosynthetics-reinforced pile foundation systems were evaluated using a series of reduced scale physical model tests performed on a shaking table ...


Managing Geotechnical Risk On Us Design-Build Transport Projects, Kevin McLain, Douglas D. Gransberg, Michael Loulakis 2014 Iowa State University

Managing Geotechnical Risk On Us Design-Build Transport Projects, Kevin Mclain, Douglas D. Gransberg, Michael Loulakis

Civil, Construction and Environmental Engineering Publications and Papers

Awarding design-build (DB) contracts before a complete subsurface investigation is completed, makes mitigating the risk of differing site conditions difficult, if not impossible. The purpose of the study was to identify effective practices for managing geotechnical risk in DB projects, and it reports the results of a survey that included responses from 42 of 50 US state departments of transportation and a content analysis of DB requests for proposals from 26 states to gauge the client’s perspective, as well as 11 structured interviews with DB contractors to obtain the perspective from the other side of the DB contract. A ...


Analiza Rozwoju Fragmentu Zabudowy Miasta Torunia Na Podstawie Zdjęć Z Landsat7 Z Wykorzystaniem Map Granulometrycznych., Andrzej Szeszko 2014 SelectedWorks

Analiza Rozwoju Fragmentu Zabudowy Miasta Torunia Na Podstawie Zdjęć Z Landsat7 Z Wykorzystaniem Map Granulometrycznych., Andrzej Szeszko

Andrzej Szeszko

Głównym celem niniejszej pracy było określenie rozwoju części zabudowy miasta Torunia

w latach 1999-2005, oraz sprawdzenie, jakie wyniki w takim zadaniu można uzyskać stosując mapy

granulometryczne wygenerowane ze zdjęć panchromatycznych o rozdzielczości przestrzennej rzędu

kilkunastu metrów. Analizę przeprowadzono na podstawie fragmentów scen satelitarnych Landsat7

zarejestrowanych przez skaner ETM+ w kilku zakresach spektralnych.

Analiza składała się z trzech następujących etapów:

· wyodrębnienia zabudowy w latach 1999 i 2005

· określenie zmian w zabudowie na podstawie zasięgu zabudowy w latach 1999 i 2005

· określenie dokładności wyznaczenia zabudowy i zmian w zabudowie

Do wyodrębnienia zabudowy posłużono się klasyfikacją map granulometrycznych. Wybór map granulometrycznych

najwierniej oddającej ...


Simulation Of Bedrock Motion To Obtain Pga Values, Shyanaka Dananjaya, Ranjith Dissanayake, Nimal Senevirathne, Kushan K. Wijesundara 2014 Purdue University

Simulation Of Bedrock Motion To Obtain Pga Values, Shyanaka Dananjaya, Ranjith Dissanayake, Nimal Senevirathne, Kushan K. Wijesundara

International Institute for Infrastructure Resilience and Reconstruction (I3R2) Conference

This study is focused on producing the Peak Ground Acceleration (PGA) values for important cities in Sri Lanka, which would provide the base to develop the national annex to the Euro Code, the current guideline in designing structures. In order to find out the magnitude and the epicenter distance of a 475-year return period earthquake, an earthquake catalog was developed. To simulate the bedrock motion FLAC Software, which uses the Finite Difference approach, was used. Five 2-D FLAC models representing five cross sections of Sri Lanka were developed. Due to the lack of local data records, a dataset of seven ...


Mitigation Of Sand Liquefaction Using In Situ Production Of Biogas With Biosealing, Yishan Li 2014 Iowa State University

Mitigation Of Sand Liquefaction Using In Situ Production Of Biogas With Biosealing, Yishan Li

Graduate Theses and Dissertations

Sand liquefaction refers to a phenomenon whereby sand loses its strength and stiffness. It is responsible for many of the damages associated with earthquake. Partial desaturation of soil using bacterial production of biogas is a new method for mitigation of sand liquefaction. However, there is a concern that whether biogas in sand can be stable over a long duration when there is groundwater flow. In this study, a new method that combines biogas generation in situ with biosealing of the biogas bubbles in sand using a small quantity of biocement was developed. Biogas bubbles were produced in the form of ...


Calibration Of Non-Nuclear Devices For Construction Quality Control Of Compacted Soils, Joshua E. R. Wells 2014 University of Kentucky

Calibration Of Non-Nuclear Devices For Construction Quality Control Of Compacted Soils, Joshua E. R. Wells

Theses and Dissertations--Civil Engineering

Inadequate compaction of a soil subgrade can lead to detrimental outcomes that are not only costly but dangerous to the general public. To avoid this, quality control (QC) devices such as the nuclear density gauge (NDG) are currently being used to monitor the compaction and moisture content of soil subgrades. However, regulatory concerns associated with the NDG have encouraged federal and state agencies, as well as the heavy civil construction industry to consider non-nuclear devices for QC testing of compacted soils. One such non-nuclear device is the Soil Density Gauge (SDG), which utilizes electromagnetic wave propagation to obtain soil properties ...


Quantifiying The Effectiveness Of A Grout Curtain Using A Laboratory-Scale Physical Model, Elliot N. Magoto 2014 University of Kentucky

Quantifiying The Effectiveness Of A Grout Curtain Using A Laboratory-Scale Physical Model, Elliot N. Magoto

Theses and Dissertations--Civil Engineering

In the past decade, the grouting industry has made significant technological advancements in real-time monitoring of flow rate and pressure of pumped grout, stable grout mix design, and with grout curtain concepts dealing with placement and orientation. While these practices have resulted in improved construction practices in the grouting industry, current design guidelines for grout curtains are still predominately based on qualitative measures such as engineering judgment and experience or are based on proprietary methods. This research focused on the development of quantitative guidelines to evaluate the effectiveness of a grout curtain in porous media using piezometric and hydraulic flow ...


Pile-Soil Interaction In Unsaturated Soil Conditions, Megan Hamilton 2014 University of New Hampshire

Pile-Soil Interaction In Unsaturated Soil Conditions, Megan Hamilton

Honors Theses

The degree of saturation has been proven to significantly affect geotechnical engineering designs for foundations. The changes in water content will influence the way the soil behaves, including its strength and stiffness parameters. These characteristics were analyzed for a uniform silty sand by developing P-Y curves, which relate lateral loading to lateral deformations. These P-Y curves were input into FB-Multipier, a software developed by the Bridge Software Institute. The software is capable of generating deformations as a result of user-defined loading cases. The results indicated that the middle range of degrees of saturation produced the least amount of deformation. This ...


Investigation Of Hollow Bar Micropiles In Cohesive Soil, Osama F. El Hadi Drbe 2013 Western University

Investigation Of Hollow Bar Micropiles In Cohesive Soil, Osama F. El Hadi Drbe

University of Western Ontario - Electronic Thesis and Dissertation Repository

Micropiles are used in various applications, including low capacity micropile networks, underpinning and seismic retrofitting of existing foundations and high capacity foundations for new structures. They facilitate fast installation with a high degree of ground improvement. The current Federal Highway Administration (FHWA) design guidelines designate hollow bar micropiles as Type B micropiles, even though their construction technique is different than typical Type B, which results in overly conservative design. In addition, the current practice for construction of hollow bar micropiles is limited to drilling bit/hollow bar diameter ratio of 2.5 or less. In this thesis, full-scale load tests ...


Cyclic And Post-Cyclic Response Of Silt And Sandy Silt Soils, Ali El Takch 2013 Western University

Cyclic And Post-Cyclic Response Of Silt And Sandy Silt Soils, Ali El Takch

University of Western Ontario - Electronic Thesis and Dissertation Repository

A series of cyclic and monotonic constant-volume ring shear tests were carried out to determine the cyclic and post-cyclic response of silts and sandy silts with 25% and 50% sand. The elastic soil behavior at very small shear strain (γ < 10-4%) was investigated through shear wave velocity (Vs) measurements using bender elements at vertical stresses ranging from 50 to 300 kPa, while strain-controlled constant volume cyclic ring shear tests were conducted to establish shear modulus (G) and damping ratio (D) at larger shear strain amplitudes (γ > 0.01%). Liquefaction and strain-softening occurred at excess pore water pressure ratios (ru ...


Investigation Of Asphalt Pavement Mixture Blending Utilizing Analytical Chemistry Techniques, Benjamin Frank Bowers 2013 University of Tennessee, Knoxville

Investigation Of Asphalt Pavement Mixture Blending Utilizing Analytical Chemistry Techniques, Benjamin Frank Bowers

Doctoral Dissertations

The use of Reclaimed Asphalt Pavement (RAP) in new pavement mixtures is a topic of interest throughout the transportation industry and academia due its economic and environmental implications. There is concern however about how well the binder from the RAP blends with new, virgin binder when the mixture is created. Insufficient blending of the aged and unaged binders may compromise the long-term pavement performance. In this study, an enhanced staged extraction method is coupled with two chemical testing techniques to develop a novel approach for evaluating blending efficiency from a qualitative and quantitative perspective: Gel Permeation Chromatography (GPC) and Fourier ...


Digital Commons powered by bepress