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Full-Text Articles in Geological Engineering

Development Of Lidar Assisted Terrestrial Radar Interferometry For Rock Deformation Monitoring, Ricardo Javier Romero Ramirez Jan 2019

Development Of Lidar Assisted Terrestrial Radar Interferometry For Rock Deformation Monitoring, Ricardo Javier Romero Ramirez

Doctoral Dissertations

"Rock and soil slope movements cost millions of dollars annually. During the past few decades, engineers have relied on traditional methods to detect slope movements. These tools are valuable for small spatial areas but, may not be adequate or cost effective for large spatial areas. Remote sensing methods such as terrestrial laser scanning (TLS) and terrestrial radar interferometry (TRI) provide excellent spatial coverage, and with adequate post-data-processing software, sub-millimetric scale deformation sensitivity can be achieved.

This work will present a comparative experimental study between TLS and TRI. The comparative experimental study will allow us to achieve the two main objectives ...


Detection And Elimination Of Rock Face Vegetation From Terrestrial Lidar Data Using The Virtual Articulating Conical Probe Algorithm, Kenneth John Boyko Jan 2019

Detection And Elimination Of Rock Face Vegetation From Terrestrial Lidar Data Using The Virtual Articulating Conical Probe Algorithm, Kenneth John Boyko

Doctoral Dissertations

"A common use of terrestrial lidar is to conduct studies involving change detection of natural or engineered surfaces. Change detection involves many technical steps beyond the initial data acquisition: data structuring, registration, and elimination of data artifacts such as parallax errors, near-field obstructions, and vegetation. Of these, vegetation detection and elimination with terrestrial lidar scanning (TLS) presents a completely different set of issues when compared to vegetation elimination from aerial lidar scanning (ALS). With ALS, the ground footprint of the lidar laser beam is very large, and the data acquisition hardware supports multi-return waveforms. Also, the underlying surface topography is ...


Centrifuge Modeling Of Dense Granular Columns In Layered Liquefiable Soils With Varying Stratigraphy And Overlying Structures, Mahir A. Badanagki Jan 2019

Centrifuge Modeling Of Dense Granular Columns In Layered Liquefiable Soils With Varying Stratigraphy And Overlying Structures, Mahir A. Badanagki

Civil Engineering Graduate Theses & Dissertations

Soil liquefaction and ground failure have been a major source of damage to slopes, embankments, and structures during previous earthquakes. The risk of liquefaction and associated ground deformations can be reduced by various forms of improvement, including the granular column technique. Granular columns are known to be cost effective and environmentally friendly, and they have been in use since the 1970’s to mitigate the liquefaction hazard. Granular columns mitigate the consequences of soil liquefaction through a combination of: 1) installation-induced ground densification, 2) increase in lateral effective stresses in the surrounding soil, 3) increase in shear stiffness, and 4 ...


Hawai'i Wildlife Fund V. County Of Maui, Lowell J. Chandler Apr 2018

Hawai'i Wildlife Fund V. County Of Maui, Lowell J. Chandler

Public Land & Resources Law Review

In Hawai’i Wildlife Fund v. County of Maui, the Ninth Circuit held that the plain language of the Clean Water Act provides jurisdiction over indirect discharges of pollutants from a point source into groundwater that is shown to be connected to navigable waters. The court found that studies confirmed pollutants entering the Pacific Ocean were fairly traceable to the County of Maui’s sewage disposal wells. In affirming the district court’s ruling, the Ninth Circuit held that Maui County violated the Clean Water Act by discharging pollutants into a navigable water without the required permit. The court also ...


Hierarchical Multiscale Modeling To Inform Continuum Constitutive Models Of Soils, Erik Wallace Jensen Jan 2017

Hierarchical Multiscale Modeling To Inform Continuum Constitutive Models Of Soils, Erik Wallace Jensen

Civil Engineering Graduate Theses & Dissertations

The behavior of soils is fundamentally the combined interactions between billions and billions of individual particles and particle matrices. For computational tractability and despite this fact, many soil models assume the material is a continuum essentially averaging the inter-particle interactions to predict the behavior of the bulk material. In recent years, multiscale modeling techniques have been developed to reintroduce the effect of the grain-scale interactions to help model situations where the continuum assumption fails, such as shear band development in triaxial tests or soil disaggregation under blast loading. One of such multiscale models called hierarchical upscaling, or global-local analysis, model ...


Mechanisms Of Thermal Volume Change In Unsaturated Silt, Charles James Russell Coccia Jan 2015

Mechanisms Of Thermal Volume Change In Unsaturated Silt, Charles James Russell Coccia

Civil Engineering Graduate Theses & Dissertations

There has been an increased interest in geotechnical engineering applications that require an understanding of the impact of temperature on the thermo-hydro-mechanical response of soils for their design and sustainable long-term operation. Examples include the implementation of ground source heat exchangers (GSHEs) into deep foundations to form energy piles, high-level nuclear waste repositories, burial of high-voltage cables, and the utilization of waste heat for the improvement of unsaturated backfill soils in earthen embankments or mechanically stabilized earth walls. An issue of particular interest in these applications is the drained volumetric response of unsaturated soil due to changes in temperature. The ...


Modeling Uplift And Fluid Flow In Fractures To Determine The Failure Probability Of Concrete Gravity Dams, Erik Jensen Jan 2013

Modeling Uplift And Fluid Flow In Fractures To Determine The Failure Probability Of Concrete Gravity Dams, Erik Jensen

Civil Engineering Graduate Theses & Dissertations

The United States Army Corps of Engineers (USACE) currently operates many large concrete gravity dams that outright fail or narrowly meet design criteria. This is particularly true when elevated reservoir levels cause tensile stresses along a dam's upstream face resulting in cracks along the dam-foundation contact, within the dam or within the dam's foundation. Water pressures are then able to develop within these cracks increasing the uplift pressure on the dam potentially further destabilizing the system. Certain crack locations and orientations can also render drainage systems within the dam ineffective further increasing water pressures. To study the effects ...


Evaluation Of A Three-Dimensional Model For Slurry Storage Facilities, Robert Miller Jan 2012

Evaluation Of A Three-Dimensional Model For Slurry Storage Facilities, Robert Miller

Civil Engineering Graduate Theses & Dissertations

In many mining operations large quantities of tailings in a slurry form are produced; disposing of these tailings frequently requires construction of tailings impoundment facilities (ponds). A pseudo three-dimensional model has been developed to simulate the deposition and consolidation of tailings for a given site geometry. This three dimensional model or tailings management tool (TMT) gives the tailings surface height vs. time, void ratio distributions vs. time and average dry unit weight vs. time - which aids in the design of the facilities. This thesis evaluates the model and serves as a user manual for the model. Additional features that have ...


A Deterministic Method Of Predicting Long-Term Pile Capacity In Cohesive Soils After The Dissipation Of Excess Pore Water Pressure, Eric J. Steward Jul 2011

A Deterministic Method Of Predicting Long-Term Pile Capacity In Cohesive Soils After The Dissipation Of Excess Pore Water Pressure, Eric J. Steward

Doctoral Dissertations

Pile setup or freeze is a phenomenon where the bearing capacity of a pile increases over time both during and after the dissipation of pore pressure and the stabilization of lateral earth pressure. Driven piles gain capacity after installation because of the dissipation of excess pore pressure and soil aging. Incorporating accurate setup prediction into the design of the piles can significantly reduce the cost of many projects by reducing the size or number of required piles. Various simple, empirical mathematical models have been developed to predict pile setup. However, these models are often unreliable, resulting in very conservative designs ...


Thermal Modeling Of A Mechanical Integrity Test On An Underground Storage Cavern, Brandon Charles Lampe Jan 2011

Thermal Modeling Of A Mechanical Integrity Test On An Underground Storage Cavern, Brandon Charles Lampe

Civil Engineering Graduate Theses & Dissertations

The objective of this research was to describe how the transient heat transfer phenomena influences the results of mechanical integrity tests (MITs) performed on the well of an underground storage cavern in rock salt. Underground caverns have been developed in salt deposits throughout the world for the purpose of producing brine and storing compressed air, hydrocarbons, and waste products; and are a critical underground infrastructure. Despite the very low permeability of rock salt, limited volumes of stored product may diffuse out of the cavern. Additionally, underground storage caverns change in size because of salt creep, leading to difficulties in estimating ...