Matching Items (2)
Description
Horizontal Directional Drilling (HDD) is a growing and expanding trenchless method utilized to install pipelines from 2 to 60 inch diameters for lengths over 10,000 foot. To date, there are not many public documents where direct costs and bid prices incurred by HDD installations are available and analyzed. The objective is to provide a better understanding of the factors affecting the bid prices of these projects. The first section of the thesis analyzes how project parameters such as product diameter, bore length and soil conditions affect the bid price of water and wastewater pipeline installations using HDD. Through multiple linear regressions, the effect of project parameters on bid prices of small, medium and large rigs projects is extracted. The results were further investigated to gain a better understanding of bid factors that influence the relationship between total cost and the project parameters. The second section uses unit cost, based on bid prices, to compare the costs incurred by defined categories. Parameters such as community type, product type, soil conditions, and geographical region were used in the analysis. Furthermore, using average unit cost from 2001 to 2009, HDD project cost trends are briefly analyzed against the main variations of the US economy from the same time horizon by using economic indicators. It was determined that project geometric factors influence more the bid price of small rig projects than large rig projects because external factors including market rates and economic situation have an increasing impact on bid prices when rig size increases. It was observed that bid price variation of HDD projects over years followed the same trend as the US economic variation described by economic indicators.
ContributorsVilfrant, Emmania Claudyne (Author) / Ariaratnam, Samuel T (Thesis advisor) / Lueke, Jason S (Committee member) / Chasey, Allan D (Committee member) / Arizona State University (Publisher)
Created2010
Description
This thesis provides evidence that China has maximized building infrastructure byseeking new ways to utilize underground space. China is a shining example of how
integrating underground space will improve quality of life, transportation, entertainment
centers, and national safety. China is rethinking how they develop its cities by creating
tunnels, commercial buildings, parking lots, subways, utility service tunnels, military
defense bunkers, and storage facilities underground. Hundreds of kilometers of tunnels
alleviate China’s growing traffic congestion problem, to help with vehicle congestion,
other means of transportation are created like subway systems that sprawl underneath the
city. Commercial buildings can be built underground to maximize the vertical growth of
businesses in a city. A high number of personal vehicles means cities have to increase the
availability of parking spaces, with underground parking garages, space can be maximized
to hold hundreds of cars underground while maintaining commercial buildings above
ground. The ease of having a central utility tunnel that houses all the utilities in one place
is how China is forward-thinking of the maintenance of their future cities. As China grows,
they must be prepared to protect their citizens and leaders so they store their most important
military equipment underground so they can keep them secure. As a way of reusing old
dried-up oil wells, natural gas is stored underground to mitigate risk and cut down on costs
for storage facilities. China has made significant strides to ensure a bright future for its
citizens, with the utilization of underground space, China maximizes productivity and
quality of life for its people.
ContributorsWu, Binqing (Author) / Ariaratnam, Samuel SA (Thesis advisor) / Chong, Oswald OS (Committee member) / Czerniawski, Thomas TC (Committee member) / Arizona State University (Publisher)
Created2021