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Innovative Directional Microtunnel Garners Success for Crucial Trenchless Crossing
The purpose of this paper is to present a case history of the Interstate 84 and U.S. Highway 6 Directional Microtunnel (I-84 DMT) crossing located near Matamoras, Pennsylvania ,and look at this innovative project as a whole to learn how the methods can be applied to future trenchless crossings with difficult site conditions. The crossing was a critical part of the Tennessee Gas Pipeline Company, LLC (Tennessee Gas), a Kinder Morgan Company, Northeast Upgrade Project (NEUP). Due to environmental and cultural resource areas and other constraints, the crossing had to be made where it was located despite challenging trenchless and geotechnical engineering issues posed by the location. Due to geometric and geotechnical constraints several trenchless crossing methods were considered before the design team ultimately selected curved or directional microtunneling. The crossing was completed using Herrenknecht AG's (Herrenknecht's) Direct Pipe (DP) tunneling system incorporating Permalok casing pipe in a segmental or cartridge fashion because not enough workspace was available for a conventional DP pipe string layout. The 470-ft-long crossing consisted of 42-in.-diameter casing pipe in which the concrete-coated, 30-in.-diameter high pressure steel gas pipeline was later installed.
Innovative Directional Microtunnel Garners Success for Crucial Trenchless Crossing
The purpose of this paper is to present a case history of the Interstate 84 and U.S. Highway 6 Directional Microtunnel (I-84 DMT) crossing located near Matamoras, Pennsylvania ,and look at this innovative project as a whole to learn how the methods can be applied to future trenchless crossings with difficult site conditions. The crossing was a critical part of the Tennessee Gas Pipeline Company, LLC (Tennessee Gas), a Kinder Morgan Company, Northeast Upgrade Project (NEUP). Due to environmental and cultural resource areas and other constraints, the crossing had to be made where it was located despite challenging trenchless and geotechnical engineering issues posed by the location. Due to geometric and geotechnical constraints several trenchless crossing methods were considered before the design team ultimately selected curved or directional microtunneling. The crossing was completed using Herrenknecht AG's (Herrenknecht's) Direct Pipe (DP) tunneling system incorporating Permalok casing pipe in a segmental or cartridge fashion because not enough workspace was available for a conventional DP pipe string layout. The 470-ft-long crossing consisted of 42-in.-diameter casing pipe in which the concrete-coated, 30-in.-diameter high pressure steel gas pipeline was later installed.
Innovative Directional Microtunnel Garners Success for Crucial Trenchless Crossing
Robison, Jonathan L. (author) / Elmore, Jim (author)
Pipelines 2014 ; 2014 ; Portland, Oregon
Pipelines 2014 ; 758-768
2014-07-30
Conference paper
Electronic Resource
English
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