UCT - Trenchless
Tuesday, January 24
Room 102A<?xml:namespace prefix = o />
Track VII
TRENCHLESS TECHNICAL SYMPOSIUM
8:30 - 8:55 a.m.
Performance Of Structural Liner At The Location Of Ring Fracture
Moderator: Dennis Doherty, Haley & Aldrich
Speakers: Shaurav Alam, PhD Candidate, Erez Allouche, CETF Professor/Research Director, Trenchless Technology Center-Louisiana Tech University
The presence of voids and discontinuities in pipe walls must be considered in the quest of extending the useful life of deteriorated potable water mains. This work involves experimental determination of different limit states that could cause liner instability as a result of internal water pressure and uneven ground movements. One such discontinuity, frequently found in small diameter cast iron pipes that suffer from loss of beam support, is ring fracture. The liner product needs to be able to accommodate movements, which tends to take the form of angular deflection. Conclusions were made and numerical simulations were performed regarding governing failure mechanisms for fiber-reinforced CIPP liners at the location of ring fracture.
9 - 9:25 a.m.
Multi-Segment Evaluation For Selecting Underground Utility Construction Methods
Moderator: Dennis Doherty, Haley & Aldrich
Speaker: John Matthews, PhD, Research Scientist, Battelle Memorial Institute
This presentation describes the framework for a multi-attribute decision support system that takes into account: (1) technical parameters in TAG-R to select and rank technically viable methods; (2) social cost parameters within a social cost calculator to calculate the quantifiable social impact of each technology; and (3) direct cost parameters based on bid prices. The multi-attribute framework is then optimized to select the method(s) with the lowest adjusted cost for multiple pipe segments.
9:30 - 9:55 a.m.
Field Monitoring Of Pilot Tube Microtunneling InstallationsModerator: Keith Hanks, Public Works-Bureau of Engineering, City of Los Angeles
Speaker: Jason Lueke, PhD, PE, Assistant Professor/Sr. Sustainability Scientist, School of Sustainable Engineering, Build Environment, Arizona State University
Researchers at ASU undertook a project to measure and monitor the thrust required to install the pilot tubes, casing pipe, and product pipe on what is described in the industry as a “three step method” of installation. This was accomplished through the instrumentation of jacking frames and pilot tube systems with hydraulic pressure transducers to collect data during all three phases of the installation process. Data was collected from 8 installations of varying lengths and product pipe diameters, and correlated with depth of cover, soil type, and the utilization to slurry lubrication. This presentation will discuss the instrumentation process and preliminary results from the analysis of thrust and rotational pressures encountered during these installations.
10 - 11:25 a.m.
NASTT Forum: Advancement In Trenchless Technology
Presented by the North American Society for Trenchless Technology
Moderator/Panelist: Jennifer Glynn, PE, NASTT Board Member, Sr. Project Manager, RMC Water and Environment
Panelists: George Ragula, NASTT Chair, Intl. Rep., Distribution Tech. Manager, Public Service Electric & Gas; Ben Cote, M.Sc., NASTT Secretary, VP-Aqua Pipe, Sanexen Environmental Services; Kaleel Rahaim, NASTT Treasurer, Manager-Pipeline Remediation Polymers, Interplastic Corp.; James Rankin, NASTT Board Member, Application Engineer, Vermeer Corp.;
Mark Hallett, NASTT Board Member, VP, Saertex multiCom; Frank Firsching, NASTT Board Member, Executive VP-Sales, Underground Solutions
Panelists representing all aspects of industry will discuss the latest advancements in trenchless technology and new product development concepts on the horizon.
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