Potencial De Mallas Tejidas En Fibras Del Pseudotallo De La Planta De Plátano Musa X Paradisiaca Para La Protección Del Suelo Y El Control De Erosión En Taludes, Alma Linda Villadiego Durango, Brenda Alejandra Sandoval Carrillo

Ingeniería Civil

El proyecto plantea la elaboración de biomallas temporales hechas a partir de la fibra natural del pseudotallo de la planta de plátano (Musa x paradisiaca), las cuales fueron sometidas a diversas pruebas para comprobar su eficacia en la protección de taludes y reducción de la erosión laminar en los suelos, ya que esta última puede afectar la productividad del suelo, generar deslizamientos, inundaciones, dañar la infraestructura urbana e incluso generar desplazamientos de la población. Para resolver lo anteriormente planteado se llevaron a cabo pruebas en campo durante 2 meses, en un talud natural protegido con la biomalla y otro sin …

Análisis De La Estabilidad De Un Suelo Arcilloso Con Cáscaras De Huevo Pulverizadas Añadidas, Bernardo José García Araujo, Daniel Mauricio Morales Delgado

Ingeniería Civil

El sector constructor es uno de los que mayor protagonismo tiene a la hora de generar impactos ambientales y a su vez un crecimiento económico en Colombia, teniendo que para el año 2017 su participación fue del 4.9% del Producto Interno Bruto (PIB) del país comparado con el año 2001 que fue del 1.8% según en DANE 2017, sin embargo no es posible detener su crecimiento debido a que su demanda crece cada día más por el crecimiento poblacional que hay en el mundo como lo resalta (DNP, Política Nacional de Edificaciones Sostenibles , 2018), razón por la cual el …

Geomechanical, Geochemical, And Hydrological Aspects Of Co2 Injection Into Saline Reservoirs, Maziar Foroutan

Graduate College Dissertations and Theses

Carbon dioxide Capturing, and Sequestration (CCS) is a promising technique that helps mitigate the amount of CO2 emitted into the atmosphere. CCS process mainly involves capturing CO2 at the industrial plant, followed by transportation and injection into a suitable geological storage, under supercritical conditions. Saline aquifers are among the best geological storage candidates due to their availability, high storage capacity and injectivity. Despite the CCUS technology promise, several public safety concerns remain to be address, including but not limited to reservoir/wellbore stability and integrity, CO2 leakage, ground deformation (uplift) and induced seismicity.

The injected supercritical CO2 is trapped through different …

Landslide Site Assessment And Characterization Using Remote Sensing Techniques, Batmyagmar Dashbold

Theses and Dissertations--Civil Engineering

Landslides are common and dangerous natural hazards that occur worldwide, often causing severe direct impacts on human lives, public and private properties. It is imperative to identify the landslide susceptible areas to avoid or mitigate the possible damage. Landslide prediction can be presented in a slope failure in spatial and/ or temporal terms. If it is presented in spatial term, it is considered a landslide susceptibility map (LSM) defined as the probability of spatial occurrence of slope failures. If it is presented in a combination of spatial and temporal distribution of the landslide susceptibility, it is commonly referred to as …

Erosion And Sediment Controls On Reclaimed Mine Refuse Impoundments, Sara Dalen

Graduate Theses, Dissertations, and Problem Reports

To ensure the sustainable use of one of West Virginia’s precious resources, conscientious long-term management of residual waste is of immense importance. This thesis examined two main topics: i) the dewatering process of acid mine drainage (AMD) sludge, and ii) an investigation of soil loss predictions of a reclaimed coal refuse impoundment.

The first aspect of this thesis addresses clarification and remediation of AMD prior to disposal is a prominent component to preventing runoff and seepage of environmentally detrimental byproducts. To examine the effects of flocculation and dewatering more closely by means of geotextiles, an AMD sludge was analyzed. The …

Investigation Of Foundation Failures, Ali Buabbas

Graduate Theses, Dissertations, and Problem Reports

ABSTRACT

Investigation of Foundation Failures

Ali Buabbas

Foundations form a very critical component of any structure. The integrity and lifespan of the structure are dependent on the strength and durability of the foundation. Under ideal conditions, immediately after the structure is constructed, the foundation meets all the requirements of the structure. However, after a while, due to the action of many other factors, the structure’s foundation may no longer satisfy the needs of the structure.

Some of the factors contributing to the failure of the foundation can be due to natural events. Construction engineers should anticipate these factors to minimize …

Optimización De La Guía Vigente Para El Diseño De Placa-Huella En Vías Rurales De Colombia, Cristian Jahir Jiménez Soto, Edwin Stiven Borrero Londoño

Ingeniería Civil

En esta investigación se realizó una optimización de la metodología actual, ya que la guía para el diseño de placa-huella vigente considera un diseño general para cualquier tipo de proyecto. Este documento busca proporcionar un diseño particular que se adecúe a las características del proyecto y las exigencias del constructor. Para este propósito, se realizaron diferentes modelos mediante el software de elementos finitos SAP2000, donde se simularon placas-huella con diferentes configuraciones, resultantes del cruce de parámetros asociados al diseño como la geometría, de resistencia a la compresión del concreto y la calidad de apoyo de la subrasante. Dichos parámetros se …

Experimental Study On Repeatedly Loaded Foundation Soil Strengthened By Wraparound Geosynthetic Reinforcement Technique, Muhammad Nouman Amjad Raja, Sanjay K. Shukla

Research outputs 2014 to 2021

In the recent past, the potential benefits of wraparound geosynthetic reinforcement technique for constructing the reinforced soil foundations have been reported. This paper presents the experimental study on the behaviour of model strip footing resting on sandy soil bed reinforced with geosynthetic in wraparound and planar forms under monotonic and repeated loadings. The geosynthetic layers were laid according to the reinforcement ratio to minimise the scale effect. It is found that for the same amount of reinforcement material, the wraparound reinforced model resulted in less settlement in comparison to planar reinforced models. The efficiency of wraparound reinforced model increased with …

Influence Of Rock Wettability On Thf Hydrate Saturation And Distribution In Sandstones, Ghazanfer Raza Abbasi, Ahmed Al-Yaseri, Abubakar Isah, Alireza Keshavarz, Sefan Iglauer

Research outputs 2014 to 2021

Natural gas trapped in hydrate deposits is a potentially enormous source of energy which can in principle be extracted from the underground reservoir structures. These reserves can potentially also catastrophically release very large quantities of greenhouse gases to the atmosphere. One key parameter which is well known to strongly influence fluid distribution, saturation, and production is rock wettability. However, the effect of wettability on gas hydrate in sediments has not been investigated yet. We thus used nuclear magnetic resonance (NMR) spectrometry to measure relaxation times (T₂ and T₁) and the corresponding surface relaxivity of tetrahydrofuran hydrate …

Predicting The Settlement Of Geosynthetic-Reinforced Soil Foundations Using Evolutionary Artificial Intelligence Technique, Muhammad Nouman Amjad Raja, Sanjay K. Shukla

Research outputs 2014 to 2021

In order to ensure safe and sustainable design of geosynthetic-reinforced soil foundation (GRSF), settlement prediction is a challenging task for practising civil/geotechnical engineers. In this paper, a new hybrid technique for predicting the settlement of GRSF has been proposed based on the combination of evolutionary algorithm, that is, grey-wolf optimisation (GWO) and artificial neural network (ANN), abbreviated as ANN-GWO model. For this purpose, the reliable pertinent data were generated through numerical simulations conducted on validated large-scale 3-D finite element model. The predictive power of the model was assessed using various well-established statistical indices, and also validated against several independent scientific …

Ground Movements And Nonlinear-Inelastic Response Of Buildings Induced By Excavations In Glacial Clay Deposits, A. Felipe Uribe-Henao

Electronic Theses and Dissertations, 2020-

The analysis of ground movements and nonlinear response of buildings induced by excavations in glacial clay deposits is conducted using finite element models built in PLAXIS2D and OpenSees. PLAXIS2D was used to simulate the performance of an urban cofferdam excavation braced with a concrete bracing system. Measured ground movements were compared with the computed response, and the influence of the temperature, installation, and curing effects on the concrete bracing is evaluated. Concrete time-dependent effects contributed to 32% of the maximum lateral wall movements. The numerical studies are expanded in a second finite element analysis to characterize the coupled fluid-solid response …

Geophysical Techniques Used For The Analysis And Prediction Of Soil Strength And Mechanical Behavior, Matthew A. Hurley

Theses and Dissertations--Civil Engineering

Determining soil properties involves extensive laboratory testing of samples at discrete timing and location. Non-destructive analysis methods, such as electrical and seismic, presents alternatives to means of gathering soil properties accompanied with increased flexibility due to spatial and temporal applications. This research examined the ability of seismic wave data to predict soil behavior such as stress-strain and pore pressures using a modified version of Duncan and Chang (1970). Friction angle predictions were also analyzed using shear wave velocity and a modified form of the Santos and Gomez-Correria (2001) equation. This research also analyzed the use of electrical data to predict …

Seismic Soil-Structure Interaction Effects In Tall Buildings Considering Nonlinear-Inelastic Behaviors, Jaime Mercado

Electronic Theses and Dissertations, 2020-

Soil-structure interaction (SSI) effects are relevant for the seismic analysis of tall buildings on shallow foundations since the dynamic behavior of structures is highly affected by the interaction between the superstructure and supporting soils. As part of earthquake-resistant designs of buildings, considering SSI effects in the analysis provides more realistic estimates of its performance during a seismic event, particularly when both the structure and soil undergo large demands that can compromise serviceability. Oversimplifications of structural or soil modeling in the analysis introduces variability and biases in the computed seismic response. The main goal of this dissertation is to investigate the …

Stress-State Dependency Of The Deformation Ratio Of Quasi-Elastic Granular Soils Under Cyclic Loading -- Supporting Information, Pingxin Xia, Longtan Shao, Wen Deng

Research Data

Poisson’s ratio, besides its transverse-axial strain ratio definition, also plays a significant role in traditional elastic theory as an elastic constant. However, this elastic role of Poisson’s ratio faces a challenge when applied to quasi-elastic granular soils. A so-called “deformation ratio” is therefore introduced and measured in this paper for quasi-elastic granular soils. With the same definition of the transverse-axial strain ratio as Poisson’s ratio, the stress-state dependency of the deformation ratio and the break-down of conversion relationship of elastic constants are investigated under cyclic triaxial tests. The results show that Poisson’s ratio is consistent with deformation ratio only in …

Revised Draft Final Butte Reclaimed Areas Maintenance And Monitoring (M&M) Plan In Accordance With Butte Reclamation Evaluation System (Bres), Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Influence Of Diagenetic Features On Petrophysical Properties Of Fine-Grained Rocks Of Oligocene Strata In The Lower Indus Basin, Pakistan, Abdul Majeed Shar, Aftab Ahmed Mahesar, Ghazanfer Raza Abbasi, Asad Ali Narejo, Asghar Ali Alias Daahar Hakro

Research outputs 2014 to 2021

Nari Formation is considered as one of the most important oil and gas exploration targets. These fine-grained tight sandstone reservoirs face enormous challenges due to their extremely low matrix porosity and permeability. Hence, in this regard, the study was carried out to collect the high-quality data on petrophysical properties along with mineralogy and microstructural characteristics and diagenesis. The experiments performed includes the petrographic study and scanning electron microscopy, and X-ray diffraction analyses. Besides, the measurement of petrophysical properties was carried out to assess the likely influence of the reservoir quality. The petrographic analysis shows predominantly fine- to medium-grained grey samples …

Predicting Anthropogenic Underwater Pile Driving Noise Using Pile Driving Analyzer (Pda) Data, Brandon Alfredo Rivera

UNF Graduate Theses and Dissertations

In the past several years, there has been increasing concern about anthropogenic noise generated during marine pile driving. This concern is expected to increase concomitantly with increases in waterfront construction efforts associated with aging infrastructure and sea level rise. Several guidelines are available to help predict underwater noise transmission due to pile driving, but the issue with all these methods is that they require one to measure sound pressure levels at one locus or more from the driven pile. In the context of marine construction, adding specifications for underwater noise collection may be expensive or difficult because contractors typically have …

Light Non-Aqueous Phase Liquid Migration In Ground Subsurface, Hanadi Al-Hammad

Graduate Theses, Dissertations, and Problem Reports

Abstract

Light Non-Aqueous Phase Liquid Migration in Ground Subsurface

Hanadi Al-Hammad

Groundwater aquifers are vital source for water supplies. Such water supplies are under serious potential threats of pollution due to various contaminants. One of the categories of contaminants that pollute groundwater aquifers is non-aqueous phase liquid (NAPL). NAPLs are immiscible organic compounds. NAPLs comprise two categories based on comparison of its density with density of water. The NAPLs that have density less that density of water are known as light non-aqueous phase liquid (LNAPL) such as Diesel, Toluene, and mineral oil. NAPLs with density higher than the density of …

Workshop Outcomes Report: 1st International Workshop On Seismic Resilience Of Arctic Infrastructure And Social Systems, Majid Ghayoomi, Katharine Duderstadt, Alexander Kholodov, Alexander Shiklomanov, Matthew Turner, Elham Ajorlou

Faculty Publications

No abstract provided.

Current Status Of Design And Construction Of Piles With A Pilot Hole On Rock, Charles C. Crowner

Electronic Theses and Dissertations

Driven piles at project sites get their load bearing capacity from side friction along the driven lengths as well as from end resistance. Pilot holes is a pile driving assistance method used to aid driving displacement piles through hard/ dense layers and rock. These pilot holes can be a size smaller or larger than the pile that is to be installed. The pilot hole is first drilled down to a specific depth. The use of a pilot hole reduces the “end bearing” and “side resistance” within the drilled zone and aids the driving of the pile. This process also complicates …