Browsing PhD Dissertations - DO NOT EDIT by Author "Najafi, Mohammad"
Now showing items 1-20 of 23
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Asset Management of Wastewater Interceptors Adjacent to Bodies of Water
Bani Fawwaz, Mohammad; 0000-0003-3207-5907 (2022-06-06)This dissertation presents the viability of managing a pipeline network adjacent to bodies of water to maximize asset life by evaluating the significant factors that affect the condition levels of pipeline assets. Pipeline ... -
COMPARISON OF CONDITION PREDICTION MODELS TO PRIORITIZE SEWER PIPE INSPECTIONS
Arjun, Madhuri; 0009-0008-6248-3606 (2023-08-31)Over time, wastewater collection systems deteriorate, necessitating ongoing adjustments and the development of asset management frameworks by utility proprietors to maintain the performance of their assets. Any asset ... -
COMPARISON OF ENVIRONMENTAL AND SOCIAL COSTS OF TRENCHLESS CURED-IN-PLACE PIPE RENEWAL METHOD WITH OPEN-CUT PIPELINE REPLACEMENT FOR SANITARY SEWERS
Kaushal, Vinayak; 0000-0001-7922-2746 (2019-09-03)The development of underground infrastructure, environmental concerns, and economic trends is influencing society, resulting in the advancement of technology for more efficient, environment-friendly, and cost-effective ... -
COMPARISON OF GROUND MOVEMENTS DURING TRENCHLESS TECHNOLOGY OPERATIONS FOR PIPE AND BOX INSTALLATIONS BY NUMERICAL ANALYSIS
Ashoori, Taha; 0000-0002-5808-8215 (2018-05-07)Trenchless Technologies (TTs) are alternatives or methods of choice for the construction and renewal of buried pipe or box with little or no surface disruption. Specifically, TTs are used when other traditional methods, ... -
DEVELOPING A FRAMEWORK TO OPTIMIZE THE OPERATIONS OF AN INTERMODAL UNDERGROUND FREIGHT TRANSPORTATION TERMINAL USING SIMULATION
Rezaeifar, Fatemeh; 0000-0002-4701-2987 (2018-09-04)According to the U.S. Department of Transportation (USDOT), by 2040, nearly 30,000 miles of our busiest highways will be clogged daily and it is important to increase the capacity of our transportation system. Construction ... -
DEVELOPMENT AND COMPARISON OF PREDICTION MODELS FOR SANITARY SEWER PIPES CONDITION ASSESSMENT USING MULTINOMIAL LOGISTIC REGRESSION AND ARTIFICIAL NEURAL NETWORK.
Atambo, Daniel Ogaro (2021-08-24)Sanitary sewer pipes infrastructure system in good condition is essential in providing safe conveyance of the wastewater from homes, businesses, and industries to the wastewater treatment plants. For sanitary sewer pipes ... -
DEVELOPMENT OF A FRAMEWORK FOR DESIGN AND INSTALLATION OF CEMENTITIOUS SPRAY APPLIED PIPE LININGS IN RENEWAL OF CORRUGATED METAL CULVERTS
Jalalediny korky, Seyedmohammadsadegh (2019-08-12)Millions of culverts under road embankments provide drainage for U.S. transportation network system and are in need of maintenance, repair, and renewal. Over time culverts, like any other asset, deteriorate due to many ... -
DEVELOPMENT OF A FRAMEWORK TO ESTIMATE SOCIAL AND ENVIRONMENTAL COSTS OF TRUCK, RAILROAD, AND UNDERGROUND FREIGHT TRANSPORTATION
Tabesh, Amir (2018-09-17)Increasing freight transportation capacity is the most important factor to keep US economy viable. Trucks moved 11.5 billion tons of goods, or 63.8 percent of total freight shipments in 2015, which is projected to grow ... -
Development of a Machine Learning-based Prediction Model for Construction and Environmental Costs of Trenchless Spray-applied Pipe Linings, Cured-in-place Pipe, and Sliplining Methods in Large Diameter Culverts
Serajiantehrani, Ramtin; 0000-0001-9340-1142 (2020-01-08)According to U.S. Department of Transportation, Federal Highway Administration there are more than 4.1 million miles of road in total length, making it the world’s longest and biggest road network with millions of culverts ... -
Development Of A Model For Estimation Of Buried Large Diameter Thin-walled Steel Pipe Deflection Due To External Loads
Sharma, Jwala Raj (Civil & Environmental Engineering, 2013-07-22)Design of buried pipeline systems involves solution of geotechnical and structural problems in addition to the hydraulics and mechanical issues. Just like any buried structure, it is of utmost importance to understand how ... -
Development Of A Model Of Productivity For Horizontal Directional Drilling (HDD)
Sarireh, Mohmd (Civil & Environmental Engineering, 2011-10-11)Horizontal Directional Drilling (HDD) is a growing method for installation of pipes in urban areas and where ever trenching is impossible or undesirable; such as in crossing rivers, lakes, and railways, and special areas ... -
Development of a production estimation model for tunnel boring machines (TBMs)
Janbaz, Saeed (2018-01-09)Advance rate (AR) estimation is a crucial factor at the conceptual phase of a tunneling project for preliminary estimation of tunnel boring machines' (TBMs') usage. The primary objective of this research is to develop order ... -
Development of a Structural Design Methodology for Cementitious Sprayed Applied Pipe Linings in Gravity Storm Water Conveyance Conduits
Darabnoush Tehrani, Amin; 0000-0003-1818-8139 (2020-09-04)Culverts are important components of the highway infrastructure. They form passageways through the embankment to convey storm water. Culverts are structurally designed to support superimposed earth loads or other fill ... -
DEVELOPMENT OF A STRUCTURAL DESIGN METHODOLOGY FOR POLYMERIC SPRAY APPLIED PIPE LININGS
Kohankar Kouchesfehani, Zahra; 0000-0003-0100-0654 (2020-09-04)Buried culverts are important components of the highway infrastructure. Most large culverts are built decades ago from corrugated metal or reinforced concrete materials and now have reached their design lives. Trenchless ... -
Development Of A True-cost Concept For Renewal Of Municipal Underground Pipeline Systems
Abraham, Dennis (Civil & Environmental Engineering, 2012-04-11)Asset management principles for underground pipeline infrastructure (UPI) are used by municipalities for efficient delivery of water, wastewater, and storm sewers. Due to budget constraints and limited resources, ... -
DEVELOPMENT OF CONDITION PREDICTION MODELS FOR SANITARY SEWER PIPES
Malek Mohammadi, Mohammadreza; 0000-0003-1465-6775 (2019-08-09)Utility managers and owners have challenges when addressing appropriate intervals for inspection of gravity sanitary sewer pipelines and other underground pipeline systems. Frequent inspection of sewer network is not ... -
Evaluation and Development of a Structurally Enhanced PVC Water Pipe
Paradkar, Ameya Brahmanand (2016-09-09)Many U.S. utilities rely upon iron pipe to deliver water through their distribution network. It has only been in the past 50 years that other products have penetrated into the water utilities' pipeline. The industry has ... -
EVALUATION OF DECISION-MAKING PREDICTION MODELS FOR SEWER PIPES ASSET MANAGEMENT
Shirkhanloo, Salar; 0000-0002-2402-6681 (2022-08-16)Wastewater collection systems deteriorate over time, requiring continuous adjustments and the development of asset management frameworks on the part of utility owners to maintain the performance of their assets. Any asset ... -
EXPERIMENTAL INVESTIGATION OF WATER QUALITY IMPACT ON THE COMPRESSIVE STRENGTH OF CONCRETE
Sharifzad, Shayan; 0009-0008-1520-7174 (2023-08-31)Water is an indispensable component in concrete, as it enables crucial chemical reactions. Therefore, the quality of water used in concrete plays a vital role in its performance. Contaminated water, sewage, or high-salt ... -
FATIGUE IMPACTS ON HDPE PIPE MATERIAL PROPERTIES
Shahrokh Esfahani, Marjan (2018-01-11)During a pipe’s life cycle, failures occur due to numerous factors such as age, loading conditions, environmental conditions, installation quality, manufacturing procedures, operation and maintenance strategies and so on. ...