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2022

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Articles 1021 - 1050 of 1556

Full-Text Articles in Civil and Environmental Engineering

Monitoring Of Structural Quality Under Construction Using 3d Point Cloud Data, Xinxing Yuan Mar 2022

Monitoring Of Structural Quality Under Construction Using 3d Point Cloud Data, Xinxing Yuan

Civil Engineering ETDs

Inspection of infrastructure under construction has become an active research topic in the past few decades. Due to rising costs and safety concerns of current inspection methods, automated inspection methods are proposed. In this context, this dissertation has developed a framework that uses 3D point cloud data from the bridge under construction and evaluates the design specifications and the strength capacity of the structure while is being built. This study presents a slicing algorithm for automatically evaluating rebar placement using 3D point cloud data. The outcomes of this research provide structural engineering with (i) automatic inspection of reinforcement during construction; …

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Carbon Diversion, Partial Nitritation/Anammox Enrichment, And Ammonium Capture As Initial Stages For Mainstream Ion Exchange-Deammonification Process, Sheyla Chero-Osorio Mar 2022

Carbon Diversion, Partial Nitritation/Anammox Enrichment, And Ammonium Capture As Initial Stages For Mainstream Ion Exchange-Deammonification Process, Sheyla Chero-Osorio

USF Tampa Graduate Theses and Dissertations

Eutrophication is a concerning environmental problem worldwide that results in algae blooms, oxygen depletion, damages to aquatic life and public health, water quality issues, and loss of aesthetics in water reservoirs. Nutrient (e.g., nitrogen and phosphorus) discharges from wastewater, agricultural, urban, and residential runoff promote eutrophication in receiving water bodies. In terms of nitrogen removal, conventional biological nitrogen removal (BNR) is a common technique used in many wastewater treatment plants (WWTP). However, BNR requires aeration for nitrification and organic carbon input for denitrification. In WWTP, the aeration represents a considerable investment in terms of energy costs. Recent technologies involve applying …

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Estimating The As-Placed Grout Volume Of Auger Cast Piles, Tristen Mee Mar 2022

Estimating The As-Placed Grout Volume Of Auger Cast Piles, Tristen Mee

USF Tampa Graduate Theses and Dissertations

Augered Cast-in-Place (ACIP) piles are a geotechnical foundation element increasingly used to support large publicly funded structures as an alternative to drilled shafts or driven piles. ACIP piles are constructed by drilling an excavation to the full length of the designed pile with a continuous flight auger. Grout (cement, sand, and water mixture) is then pumped through the hollow auger stem to begin grouting the excavation. After establishing an initial head pressure, the auger is slowly extracted while the remainder of the pile is grouted. Once the auger is completely removed, the steel reinforcement cage is lowered into the grouted …

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Using Machine Learning In Estimating Changing Bed Shear Over A Flume Test Box, Ghada S. Ellithy, Siddharth S. Parida Mar 2022

Using Machine Learning In Estimating Changing Bed Shear Over A Flume Test Box, Ghada S. Ellithy, Siddharth S. Parida

Publications

A dam or levee breach caused by overflow erosion is difficult to evaluate during an overtopping event due to difficulty in accessibility and quickly changing conditions. However, for assessment of risk associated with breach time and ensuing downstream consequences, the erosion rate of embankment soils during this process needs to be evaluated. Soil erosion and water depth measurements were taken during flume tests using a Shallow Water Lidar (SWL) system scans. The tests were conducted in a 1-m-wide tilting flume on three cleans and gravel soil mixes with a median grain size D50of 2, 5,and 20 mm. The box measured …

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Effects Of Downdrag On Pile Performance, Malaak Omelia Araujo Mar 2022

Effects Of Downdrag On Pile Performance, Malaak Omelia Araujo

USF Tampa Graduate Theses and Dissertations

All soils settle under the weight of newly constructed embankments. In the case of MSE wall-type embankments, piles are driven prior to embankment construction. Under the weight of the newly constructed embankment, the soil surrounding the piles may settle more than the piles themselves. This downward movement potentially drags the piles down and induces a force within the pile known as downdrag. The research on the downdrag phenomenon involving cohesionless granular soils is sparse, thus the focus of this study is to investigate the effects of downdrag on pile performance driven in Florida sandy soils. A site consisting of soil …

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The Impact Of Land Use Change On Hydrology Using Hydrologic Modelling And Geographical Information System (Gis), Nattachan Luesaksiriwattana Mar 2022

The Impact Of Land Use Change On Hydrology Using Hydrologic Modelling And Geographical Information System (Gis), Nattachan Luesaksiriwattana

USF Tampa Graduate Theses and Dissertations

Surface and groundwater conditions in west-central Florida are highly interactive, with shallow water table and sandy soil. Land use types including forests, agricultural areas, and urbanization affect water resources differently. Change in land use, associated with expanding the urban environment to support human needs, significantly impacts surface water infiltration and runoff characteristics. Construction of infrastructures such as buildings and housing can result less water to infiltrate through the soil, with increased surface water runoff and decline in evapotranspiration. A computerized hydrologic model, Hydrological Simulation Program-FORTRAN (HSPF), couple to a spreadsheet groundwater model and a Geographical Information System (GIS) were applied …

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Development Of Membrane Assisted Recovery Of Solids (Mars) Technology For Nutrient Management In Decentralized Wastewater Treatment Systems, Itzé Alejandra Kenney Mar 2022

Development Of Membrane Assisted Recovery Of Solids (Mars) Technology For Nutrient Management In Decentralized Wastewater Treatment Systems, Itzé Alejandra Kenney

USF Tampa Graduate Theses and Dissertations

Increasing global populations will result in a rise of eutrophic wastewater and an increased need in food supply. Both problems share a commonality: nutrients. Not all communities are equipped to handle one or both of those challenges, considering that typical solutions require large and energy intensive technologies. Wastewater treatment in most major cities is done through centralized treatment plants, which is not feasible for places with limited resources. Decentralized wastewater treatment systems (DWTS) have been developed as an alternative solution for those communities, but they still struggle to sustainably treat nutrients such as ammonium (NH4) and phosphate (PO4^(3-)). Zeolite has …

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Investigating Lateral Displacement Of Pile Groups Under Construction Loads And Excavation—A Case Study, Thang Pham, Andres Palma, Thuyet Nguyen, Thuy Vu Mar 2022

Investigating Lateral Displacement Of Pile Groups Under Construction Loads And Excavation—A Case Study, Thang Pham, Andres Palma, Thuyet Nguyen, Thuy Vu

Civil Engineering Faculty Publications

Piles in weak soils are sensitive to adjacent excavation and construction loads. Excessive lateral displacement of piles during construction adds shear and bending moment to the piles. This is of great concern because these additional lateral loads are sometimes not accounted for when designing piles, and the horizontal bearing capacity as well as shear strength of the piles is low. This paper presents a case study of a recent project with severe pile damage and large soil displacement during construction due to the installation of adjacent piles and excavating foundation pits. With improper construction procedures, the piles were severely damaged …

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Using Rwis Data For Winter Maintenance Decision Support, Tony Coventry Mar 2022

Using Rwis Data For Winter Maintenance Decision Support, Tony Coventry

Purdue Road School

Road weather information systems (RWIS) data is the key component to winter maintenance decision support systems (MDSS) and solutions. In this session we will learn about the FHWA’s Weather Data Environment (WxDE), a national road weather data sharing program; how the data is integrated into decision support solutions, network monitoring, and research projects. Discussion will also include strategic application of road weather data in winter maintenance decision making.

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Improving Document Retention Through Data Management Dashboards, Beau M. Gentry, Brett Lackey, Karen Hadley Mar 2022

Improving Document Retention Through Data Management Dashboards, Beau M. Gentry, Brett Lackey, Karen Hadley

Purdue Road School

Transportation projects continue to get more complex, requiring multi-layer collaboration, documentation, compliance, and more. Through specific use cases, we will demonstrate how project teams can use innovative platforms to build data management dashboards for project management and document retention for mid-West and Indiana mobility projects. This specialized visual tool brings important documents and data together, incorporates customized information, and evolves it to meet client needs in modern and easy to understand metrics.

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Streamlining Project Development Through Planning & Environmental Linkages, Karen Hadley, Brett Lackey Mar 2022

Streamlining Project Development Through Planning & Environmental Linkages, Karen Hadley, Brett Lackey

Purdue Road School

As transportation agencies continue to explore ways to be more efficient in the project development process, they are embracing integrated methodologies like planning and environmental linkages. This tool is practical, yet highly effective and inclusive, and teams across the country are experiencing its value. This presentation will highlight a variety of use cases, discuss lessons learned and best practices, and specifically address how planning and environmental linkages can be applied in Indiana and the Midwest.

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Importance Of Proactive Safety Analysis For Corridor Planning, Martin Guttenplan, Houssam Ghandour Mar 2022

Importance Of Proactive Safety Analysis For Corridor Planning, Martin Guttenplan, Houssam Ghandour

Purdue Road School

A proactive safety analysis approach assists decision makers in addressing high-risk crash elements, particularly on low-volume roadways. Using corridor planning best practices and lessons learned, this presentation will explore creative and proactive approaches for holistic planning solutions. It will also validate 2020 pandemic crash data accuracy and highlight prioritization methodologies and AASHTO and FHWA guided countermeasures applied to at-risk locations.

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Perspectives On Past And Present Mutcds, David Boruff Mar 2022

Perspectives On Past And Present Mutcds, David Boruff

Purdue Road School

This session will describe the history of the Manual on Uniform Traffic Control Devices. Prime focus will be on the Indiana version, including the procedures that have been and those that are currently used to adopt Indiana’s manual. Pending it’s adoption prior to Road School, a summary of the significant changes in next edition of the MUTCD will also be presented.

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White County Highway Garage Project Development And Outcomes, Dan Zuerner, Mike Kyburz Mar 2022

White County Highway Garage Project Development And Outcomes, Dan Zuerner, Mike Kyburz

Purdue Road School

In this presentation we will discuss the conducted project needs assessment; site search and selection process; ancillary benefits to the county and the surrounding communities; site challenges; design development strategies and lessons learned; the anticipated time line to duplicate this project; and the contractual methods used to deliver the project. We will then wrap up with a photographic campus tour of the final outcomes and improvements.

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Integrated Mobile Observations - Future Of Mobile Observation Data Technologies, Tony Coventry Mar 2022

Integrated Mobile Observations - Future Of Mobile Observation Data Technologies, Tony Coventry

Purdue Road School

Mobile observations have become an integral part of snow and ice programs. In this session we will learn about the FHWA IMO (integrating mobile observations) initiative; how mobile sensors have evolved; and what these new units are capable of doing. Discussion will include how this technology can help both the operator and the agency, how the data is visualized and used, and how agencies and airports have implemented these units.

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Fhwa Updates In Highway Safety, Derek Troyer Mar 2022

Fhwa Updates In Highway Safety, Derek Troyer

Purdue Road School

There have been numerous changes to the safety program over the years. The past year in particular has brought new challenges and opportunities. The recent infrastructure bill introduced new areas of emphasis and a renewal, and updates to programs, such as the Focused Approach to Safety and Proven Safety Countermeasures, have recently been published. Find out what all this means for traffic safety at the local, state, and federal level in this session.

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Development Of Cost-Effective High-Modulus Asphalt Concrete (Hmac) Mixtures Using Crumb Rubber And Local Construction Materials In Louisiana., Ibrahim A.I.E Elnaml Mar 2022

Development Of Cost-Effective High-Modulus Asphalt Concrete (Hmac) Mixtures Using Crumb Rubber And Local Construction Materials In Louisiana., Ibrahim A.I.E Elnaml

LSU Master's Theses

One of the emerging solutions to enhance the durability of asphalt pavements is the use of a French asphalt mix known as “High-Modulus Asphalt Concrete (HMAC).” This mix uses a hard asphalt binder, high binder content (about 6%), and low air voids content as compared to Superpave mixtures. The key objective of this study was to develop a cost-effective HMAC mixture using crumb rubber and local materials in Louisiana. To achieve this objective, four HMAC mixtures were prepared using two asphalt binders (PG 82-22 and PG 76-22 plus 10% crumb rubber) and two Reclaimed Asphalt Pavement (RAP) contents (20% and …

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Toward Dexterous Aerial Manipulation Using Embodied Human-Intelligence For Bridge Inspection And Maintenance, Dongbin Kim Mar 2022

Toward Dexterous Aerial Manipulation Using Embodied Human-Intelligence For Bridge Inspection And Maintenance, Dongbin Kim

INSPIRE Archived Webinars

Current drones perform a wide variety of tasks in surveillance, photography, agriculture, package delivery, etc. However, these tasks are performed passively without the use of human interaction. Aerial manipulation shifts this paradigm and implements drones with robotic arms that allow interaction with the environment rather than simply sensing it. Many research groups have demonstrated aerial manipulation for various applications for over a decade. For example, in construction, aerial manipulation in conjunction with human interaction could allow operators to perform several tasks, such as hosing decks, drill into surfaces, and sealing cracks via a drone. This integration with drones will henceforth …

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Roadhat D, Version 4.1 - Changes From Roadhat 3, Thomas E. Ford Mar 2022

Roadhat D, Version 4.1 - Changes From Roadhat 3, Thomas E. Ford

Purdue Road School

This session will describe the subtle and not-so-subtle changes between the new RoadHAT version 4 and previous versions and also discuss some recommended choices in using RoadHAT 4 for the various road facility types.

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Big Data Applications: Public Involvement Tools For Public Involvement, Amy L. Livingston, Houssam Ghandour Mar 2022

Big Data Applications: Public Involvement Tools For Public Involvement, Amy L. Livingston, Houssam Ghandour

Purdue Road School

Using big data to better understand origin-destination and regional travel patterns is critical to project development. Tools such as passive geographically based data lead to improved definitions for traffic analysis zones (TAZs), which, in turn, help inform public involvement plans for a more targeted approach and improved equity. This presentation will highlight future planning applications in Indiana and other case examples where we have used big data to aid the plan development of public and stakeholder engagement.

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To Lead Or Not To Lead?, Matt Sagstetter Mar 2022

To Lead Or Not To Lead?, Matt Sagstetter

Purdue Road School

Why doesn’t the flashing arrow work anymore? The green arrow doesn’t turn on, is there something wrong? These questions and more will be answered in a discussion about the operation, implementation, and education of flashing yellow arrows (FYAs) at signalized intersections. Case studies of specific intersections in Indiana will be used to show the crash history and risk analysis used to make decisions related to overall signal operation and driver safety.

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Missed That! Roadway Drainage Lessons Learned, Michael Mills Mar 2022

Missed That! Roadway Drainage Lessons Learned, Michael Mills

Purdue Road School

Intersection improvements and downtown beautification projects are common essential improvements that benefit motorists and residents of urban communities. When scoping, it is easy to disregard drainage in order to minimize cost and reduce staffing needs. However, sometimes big problems can happen when roadway drainage is not assessed. Come take a deep dive into a few examples of drainage oversights and how they were remedied.

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A Safe System Approach To Transportation Planning And Implementation, Nicole Waldheim, Kendra Schenk Mar 2022

A Safe System Approach To Transportation Planning And Implementation, Nicole Waldheim, Kendra Schenk

Purdue Road School

Planners, engineers, and designers all have a role to play in the Safe System Approach (SSA). This presentation will highlight how to address safe road users, safe vehicles, safe speeds, safe roads, and post-crash care during planning and programming. Specifically, it will describe: (1) what a safe system is using real world examples, (2) system benefits and challenges, and (3) specific implementation ideas based on lessons learned.

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Accommodating Rapid Development In Design Level Forecast A Regionally Minded Methodology, Randy Kill Mar 2022

Accommodating Rapid Development In Design Level Forecast A Regionally Minded Methodology, Randy Kill

Purdue Road School

Rapid large-scale development presents challenges for traffic engineers to accurately forecast design-year traffic volumes. Prevailing forecasting methods, such as the ITE Trip Generation Manual, tend to exaggerate local traffic impacts on large developments and do not account for regional influences. This presentation outlines the methodologies for developing the design level forecast of two large freeway projects amid largescale private developments. This approach provides significant improvements over traditional trip generation methods and model-based forecasts.

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Learning The Ropes With Stormwater Management, Jeffrey E. Kuhn Mar 2022

Learning The Ropes With Stormwater Management, Jeffrey E. Kuhn

Purdue Road School

This presentation will touch on topics and skills learned by a newly employed Stormwater Engineer working for the City of West Lafayette. Topics include erosion control methods and theory, the minimum controls measures (MCMs) for Indiana’s local municipalities, the Tippecanoe County Partnership for Stormwater Quality, Wabash River infrastructures, construction-site and outfall inspections, and much more.

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Benthic Biolayer Structure Controls Whole-Stream Reactive Transport, Kevin R. Roche, Marco Dentz Mar 2022

Benthic Biolayer Structure Controls Whole-Stream Reactive Transport, Kevin R. Roche, Marco Dentz

Civil Engineering Faculty Publications and Presentations

Hyporheic zone reaction rates are highest just below the sediment-water interface, in a shallow region called the benthic biolayer. Vertical variability of hyporheic reaction rates leads to unexpected reaction kinetics for stream-borne solutes, compared to classical model predictions. We show that deeper, low-reactivity locations within the hyporheic zone retain solutes for extended periods, which delays reactions and causes solutes to persist at higher concentrations in the stream reach than would be predicted by classical approaches. These behaviors are captured by an upscaled model that reveals the fundamental physical and chemical processes in the hyporheic zone. We show how time scales …

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Greenfield District Creates A Traffic Project, Luis Laracuente Mar 2022

Greenfield District Creates A Traffic Project, Luis Laracuente

Purdue Road School

Each year INDOT funds safety and mobility driven projects. There is yearlong internal process to identify the needs, define the problems, and plan the projects. This presentation aims at explaining this process from a district perspective and reveal our planning and funding process. We also discuss the shifting in planning philosophy and the ever-growing goal to plan and build multi-modal, self-enforcing, safe, and efficient intersections and streets.

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Rail: Yesterday, Today, And Tomorrow In Indiana, Indiana State Rail Plan, Vanetta Keffe, Keith Bucklew Mar 2022

Rail: Yesterday, Today, And Tomorrow In Indiana, Indiana State Rail Plan, Vanetta Keffe, Keith Bucklew

Purdue Road School

The Indiana State Rail Plan is focused on improving the mobility, safety, economic development, and environmental stewardship of the state’s multimodal freight system. As the Crossroads of America, Indiana is home to 50 railroads, which deliver freight and Hoosiers to their destinations daily. This session focuses on the development of Indiana’s State Rail Plan and strategies to balance rail, trucking, and inland waterways as complementary modes that together represent the future of cost-efficient freight transportation.

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Pavement Marking Updates, Joseph Bruno Mar 2022

Pavement Marking Updates, Joseph Bruno

Purdue Road School

Significant changes to pavement markings are under- way to improve the safety and service life of roads and to assist vehicles with lane departure warning systems. This presentation will provide an update on changes to the Indiana Design Manual, Standard Specifications, and Standard Drawings for the use of 6-in. lines as the normal line width, RPM usage and spacing changes, and increasing the use of durable marking materials. The presentation will also include other pavement marking topics, such as contrast markings and orange pavement markings for work zones.

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Low Impact Roundabout Conversion, Brian W. Craig, Jay Vorisek, Johnathon Nail Mar 2022

Low Impact Roundabout Conversion, Brian W. Craig, Jay Vorisek, Johnathon Nail

Purdue Road School

Low Impact Roundabout Conversion—This presentation describes the planning, design, and construction of a $527,000 compact roundabout for the City of Westfield at 171st Street and Carey Road. This stopcontrolled intersection was converted to a roundabout by constructing a center island, splitter islands, and minor pavement widening within the general footprint of the intersection. The existing pavement was re-used by placing wedge and level to achieve the roundabout’s designed grades.

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