A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Gravity Sewer Installations Using the Arrowbore Method: Case History
Gravity sewer installations require a level of accuracy tolerance of 25 mm (1 inch) on line and grade. Gravity sewers [smaller in diameter than 914 mm (36 inch)] can be installed using open cut and trenchless techniques such as pilot tube guided boring, microtunneling, and auger boring. Each of these techniques has advantages and disadvantages, and each can be the best option under certain circumstances. Open cut is a costly alternative if the sewer is deep, is below the ground water table, or includes costly reinstatement. Similarly, the above-cited trenchless methods are costly. Therefore, the owners of gravity lines need more economical alternative technique than these methods. The ability of conventional horizontal directional drilling, to install pipelines with the required accuracy for sewer installations, is questionable. However, the ArrowBore technique promises the ability to install gravity sewers using horizontal directional drilling as a cost-effective alternative. This paper presents a case history of the installation of 122 m (400 ft) of 300mm (12 inch) diameter gravity sewer in Berea, Ohio that was installed using the ArrowBore method. This sewer line was 12 m (40 ft) deep in gray clay with shale fragments. The sewer was installed successfully, except at a certain location where an unforeseen rock formation was encountered. This paper presents the design and construction aspects of this sewer, along with a discussion of the lessons learned.
Gravity Sewer Installations Using the Arrowbore Method: Case History
Gravity sewer installations require a level of accuracy tolerance of 25 mm (1 inch) on line and grade. Gravity sewers [smaller in diameter than 914 mm (36 inch)] can be installed using open cut and trenchless techniques such as pilot tube guided boring, microtunneling, and auger boring. Each of these techniques has advantages and disadvantages, and each can be the best option under certain circumstances. Open cut is a costly alternative if the sewer is deep, is below the ground water table, or includes costly reinstatement. Similarly, the above-cited trenchless methods are costly. Therefore, the owners of gravity lines need more economical alternative technique than these methods. The ability of conventional horizontal directional drilling, to install pipelines with the required accuracy for sewer installations, is questionable. However, the ArrowBore technique promises the ability to install gravity sewers using horizontal directional drilling as a cost-effective alternative. This paper presents a case history of the installation of 122 m (400 ft) of 300mm (12 inch) diameter gravity sewer in Berea, Ohio that was installed using the ArrowBore method. This sewer line was 12 m (40 ft) deep in gray clay with shale fragments. The sewer was installed successfully, except at a certain location where an unforeseen rock formation was encountered. This paper presents the design and construction aspects of this sewer, along with a discussion of the lessons learned.
Gravity Sewer Installations Using the Arrowbore Method: Case History
Atalah, Alan (author) / Ampadu, Eric (author)
Pipeline Division Specialty Conference 2006 ; 2006 ; Chicago, Illinois, United States
Pipelines 2006 ; 1-8
2006-07-28
Conference paper
Electronic Resource
English
Gravity Sewer Installations Using the Arrowbore Method: Case History
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