Edmonton Technical Lunch - Thursday October 19, 2017


NASTT Colleagues and Friends,

Please join us for the second technical lunch of the 2017-2018 season on Thursday, October 19th, 2017.

This month’s presentation will be discussing the Regional Municipality of York’s 16th Avenue Trunk Sewer Rehabilitation Pilot Study.

Constructed in 2002/2003, the Regional Municipality of York’s 16th Avenue Trunk Sewer is a 2,642mm sewer installed at depths ranging from 35 m to 47 m using a tunnel boring machine and a two-pass method of construction. CCTV and Multi Sensor Instrumentation inspections performed between 2006 and 2014 indicated evidence of defects and deterioration including infiltration and migration of fines. Based on these inspections, a preliminary rehabilitation design was developed which included a 2,250mm glass fiber reinforced plastic (GRP) slip-liner with full annulus grouting installed using a maximum of 4 new construction access shafts.

After completion of the Preliminary Design, a Constructability, Value Engineering and Peer Review was performed. The objective of this review was to evaluate the proposed trunk sewer rehabilitation approach based on existing information to identify the “the lowest risk, best technical, and best value solution available” for rehabilitation. The key requirements of the proposed rehabilitation solution were to minimize disruption, reduce construction risks, reduce capital cost, and minimize impact on hydraulic capacity of the sewer.

After reviewing the full range of pipe rehabilitation technologies available in the marketplace, it was concluded that a less costly and lower risk solution would be a high-strength spray applied geopolymer mortar liner. A Pilot Study was conducted to demonstrate the suitability of the geopolymer material and the installation procedure. This presentation will discuss the findings of the CB/VE/PR along with the results of the Pilot Study.

This month’s presenter is Mike Davolt. Mike is a project manager and project engineer for Michels Canada. He has worked within the underground industry in a variety of roles over the last 10 years with expertise in hard rock drill/blast techniques, soft ground TBM’s, microtunnelling operations, and a variety of tunnel rehab techniques. Alternating between proposal writing, estimating, and project management, Mike has been with Michels for the over 3 years and is based in their North Vancouver office.

Online Registration Closed.

Place: University of Alberta Faculty Club, Papaschase Room, 11435 Saskatchewan Drive

11:30 am Registration
12:00 pm Lunch
12:30 pm Guest Speaker
1:30 pm Adjournment

Greg Tippett, P.Eng.
NASTT-NW Chapter