Productivity Analysis for Boulac’s Wastewater Microtunnels in Egypt
Publication: Practice Periodical on Structural Design and Construction
Volume 9, Issue 2
Abstract
The need for utility service line replacement or repairs with minimum disruption to the surface has increased the demand for trenchless excavation methods like microtunneling. Microtunneling is a trenchless technique that is used in installation of new pipelines. Microtunneling can be applied in gravity and pressure lines, permanent ducts for cables, and crossings under rails or roads. In order to give a better view of the microtunneling method, a successful case study of a microtunneling project is presented. This project was one of the projects to construct a new sewer system supplementary to the old sewer system in Cairo, Egypt. Boulac is a very crowded district of Cairo, Egypt, with about 4 million people. The contractor was a consortium of five specialized international companies. The engineer was a consortium of four American and British companies. Boulac’s microtunneling project value was about $300 million and lasted for about 5 years. The length of microtunneling drives in Boulac was about 6.0 km. Microtunneling machines of 600 and 1,000 mm diameters were used. The productivity of the machines has been analyzed including consideration of factors such as the operator’s experience in different soils for different microtunneling machines.
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References
Atalah, A., and Hadala, P. (1996). “Microtunneling database for the USA and Canada from 1984 to 1995.” Proc., Specialty Conf.: Pipeline Crossings, Burlington, Vt., 332–339.
Iseley, D. T., and Najafi, M. (1998). “New developments in microtunneling technology.” Proc., OMAE ’98—Lisbon, 17th Int. Conf. on Offshore Mechanics and Arctic Engineering, Lisbon, Portugal.
Nido, A. (1999). “Productivity projection model for microtunnelling operations based on a quantitative analysis of expert evaluation.” Independent Research Study, Purdue Univ., West Lafayette, Ind.
Thomson, J. C. (1993). Pipejacking and microtunnelling, Blackie Academic & Professional, London.
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Copyright © 2004 American Society of Civil Engineers.
History
Received: Feb 3, 2003
Accepted: May 20, 2003
Published online: Apr 15, 2004
Published in print: May 2004
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