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Filtering by: Alternative title ssim The North Bend airport extension site Remove constraint Alternative title ssim: The North Bend airport extension site Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering

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  • Characterization of reinforced fill soil, soil-reinforcement interaction, and internal stability of very tall MSE walls

    Creator:
    Walters, James J.
    Abstract:
    In many geotechnical design situations involving tight right-of-way constraints, Mechanically Stabilized Earth (MSE) walls are often the most cost-effective and reliable earth retention technology among available alternatives. However, few well-documented case histories with detailed material testing, instrumentation programs and construction observation of performance are available in the literature. Despite the...
    Resource Type:
    Masters Thesis
    Full Text:
    the Seattle-Tacoma International Airport (SeaTac). Tension testing was performed on coupons cut from

  • Modeling sediment transport, channel morphology and gravel mining in river bends

    Creator:
    Nam, Ilgi
    Abstract:
    A technique is developed and tested to analyze the interaction of flowing water, bed topography, and bedload sediment transport in meandering channels where gravel bars are removed. The method relates the local velocity distribution, bed shear stress and sediment transport conditions to the local bed configuration in river bends before...
    Resource Type:
    Dissertation
    Full Text:
    velocity distribution shifts inward toward the convex bank of a channel bend at high water levels after

  • Disposal of sandy pipeline dredge spoils by end dumping

    Creator:
    Pyles, Marvin Russell
    Abstract:
    Channel maintenance operations in the rivers and harbors of the United States annually require the disposal of over 320 million cubic meters of dredge spoils. As the availability of suitable land sites diminishes, open water disposal presents an attractive yet controversial alternative method. For open water disposal to be acceptable,...
    Resource Type:
    Masters Thesis
    Full Text:
    follows. Upon arriving at the site, a number of spoil samplers were laid out in a prearranged area in an

  • Consideration of Driver Behavior in the Design of Red Light Extension Systems

    Creator:
    McCrea, Sarah Anne
    Abstract:
    Red Light Running (RLR) is a safety hazard at signalized intersections in Oregon and throughout the United States. Various methods of mitigating factors contributing to RLR have been implemented but few protect against a conflict when a vehicles runs a red light. Additionally, current prediction algorithms are complicated; there is...
    Resource Type:
    Masters Thesis
    Full Text:
    Extension Systems AN ABSTRACT OF THE THESIS OF Sarah Anne McCrea for the degree of

  • Depth-dependence of surf zone eddies : a study at Duck, NC

    Creator:
    Aiken, Rebecca A.
    Abstract:
    Surf zone eddies (f < 0.01 Hz) are important in nearshore mixing, shoreline erosion, the distribution of pollutants, and ecological processes, such as offshore transport of larvae. Surf zone eddies have traditionally been treated as two-dimensional features with horizontal length scales larger than the local water depth. Studies by Lippmann...
    Resource Type:
    Masters Thesis
    Full Text:
    in Section 7. 5 3 Field Site and Experiment A field study was conducted at the

  • Evaluation of a Pedestrian Call Extension and Cancelation System at a Midblock Trail Crossing

    Creator:
    Milacek, McKenna
    Abstract:
    Signalized intersections often provide pushbuttons to call for pedestrian service to minimize conflicting movements between road users. Signalized midblock crossings typically increase safety for pedestrians in locations with high traffic volumes and multiple lanes in each direction. However, unnecessary vehicular delay occurs from “ghost” pedestrian intervals when someone activates the...
    Resource Type:
    Masters Thesis
    Full Text:
    ................................................................................ 16 Figure 7- Approximate Camera Locations at the Study Site for Observation

  • Characterization of the Small-Strain Stiffness of Soils at an In-situ Liquefaction Test Site

    Creator:
    Donaldson, Aleyna M.
    Abstract:
    Strong ground motions from earthquakes can result in the reduction of the shear modulus and wave propagation characteristics of soils, and can produce liquefaction and cyclic softening during shaking and for some time following the seismic event. While the ground motions produced from controlled blasting are different than those in...
    Resource Type:
    Masters Thesis
    Full Text:
    one-dimensional velocity profiles for the layers of interest at the test site. In general, the three

  • Direction, method, and model for implementing design for construction worker safety in the US

    Creator:
    Tymvios, Nicholas
    Abstract:
    The construction industry employs about 7% of the total US workforce, and yet it accounts for 15.7% of all occupational fatalities. Specifically in 2011, there were 721 deaths in construction, second only to transportation with 733. The cause of a large number of these construction deaths can be attributed to...
    Resource Type:
    Dissertation
    Full Text:
    construction deaths can be attributed to factors that are distant from the construction site. A European

  • Molecular analysis of bacterial community dynamics during bioaugmentation studies in a soil column and at a field test site

    Creator:
    Li, Jun
    Abstract:
    1,1,1-Tricholorethane (1,1,1-TCA), a widely used industrial solvents, is one of the most common subsurface contaminants. Transformation processes in the subsurface can result in the production of 1,1-dichioroethane (1,1-DCA) and 1,1- dichioroethene (l,1-DCE) from 1,1,1-TCA contamination, resulting in plumes of mixed chlorinated aliphatic hydrocarbons (CAHs). A butane-utilizing microorganism, strain 1 83BP,...
    Resource Type:
    Masters Thesis
    Full Text:
    inoculum were conducted at the Moffett Federal Airfield In-Situ Bioremediation Test Site (Moffett Field

  • Quantifying the Relative Role of the Key Drivers of Coastal Dune Evolution: Observations and Simulations Across a Range of Time and Space Scales in Cape Lookout National Seashore, North Carolina

    Creator:
    Hovenga, Paige A.
    Abstract:
    Coastal dunes provide a diverse set of ecosystem services including coastal protection against destructive surge and waves during storm events. Dunes are constantly evolving through various stages of response to storm events and post-storm recovery at rates that vary due to a range of drivers including pre-existing morphology, environmental forcing...
    Resource Type:
    Dissertation
    Full Text:
    the complex, ecomorphodynmics driving coastal foredune change along the three North Carolina barrier