We hope to see you at the No-Dig Conference in Orlando March 28 through 31. We’re excited to participate in this long-awaited conference. Look for our booth, number 525. We’ll be raffling some great prizes for those that stop by and visit.
Two of Brierley’s own are serving as Track Leaders. Brian Dorwart for the HDD Track, and Rory Ball for the Microtunneling Track.
Our trenchless and HDD Subject Matter Experts are giving several talks at the conference, so look for these sessions:
Planning, Design and Construction Challenges Associated with a Curved Microtunnel Shore Landing through Volcanic Deposits
March 29, 2021, 9:55 AM to 10:20 AM
Speakers: Alberto Osorio Liebana, Project Director, Director of Thermal Engineering, Invenergy, Dave Sackett, Brierley Associates, Nick Strater, Brierley Associates, Brian Dorwart, Brierley Associates
A 24-in high pressure natural gas pipeline was installed in early 2021 to tie in a proposed offshore LNG receiving terminal with a new onshore gas-fired power plant. A face-accessible 84-in slurry microtunneling machine (MTBM) was used to install Reinforced Concrete Jacking Pipe casing along the curved alignment from the onshore entry pit to an exit pit trenched into the seabed sediments over 350 meters offshore. The gas pipeline and an associated Fiber Optic cable were then pulled through the tunnel. The microtunnel advanced through complex geology consisting of debris avalanche deposits of gravel to boulder-sized andesite and basalt clasts and poorly cemented volcanic ash matrix. The paper will focus on geotechnical site characterization, selection of the MTBM, design of the entry and exit pits, tunnel construction methods, and lessons learned.
Geotechnical Baseline Reports for HDD – When, Why, and How
Monday, March 29, 2020, 11:10 AM – 11:35 AM
Speakers: Michelle Macauley, President, Macauley Trenchless, and Nick Strater, Trenchless and HDD Sectors Leader, Brierley Associates
Geotechnical Baseline Reports (GBRs) for Horizontal Directional Drilling (HDD) projects are becoming more common as a risk management tool. This paper draws from previous GBRs written for HDD projects and addresses challenges associated with discussing GBRs with owners, identifying baseline ground conditions, crafting measurable baseline statements, and efficiently communicating this information to contractors and owners.
Concepts and Mathematics of Pilot Hole Directional Drilling: TM2-T2-01
March 30, 2021, 10:20 AM to 10:45 AM
Speakers: Brian Dorwart, Senior Consultant, Brierley Associates, Marcel Berard, TrueGyde Systems
A summary of physical concepts and their mathematical calculations involved in drilling a horizontal pilot bore and defining of reamed radius. Intended for both operators and engineers.
HDD Lessons Learned on Missouri and Sun River Crossings in Great Falls, Montana
Tuesday, March 30, 2021 9:15 AM – 9:40 AM
Speakers: Rick Johnson, City Engineer, City of Great Falls, Jim Williams, Senior Associate, Brierley Associates, Dustin Nett, Discipline Director – Water, Sewer & Storm, TD&H Engineers, Steve Donovan, Vice President Engineering, The HDD Company
The challenges and solutions for two large HDD projects are discussed for a water transmission project in Great Falls, Montana. A comparison of HDD design and construction parameters, FPVC considerations, conductor casing installation, testing and other topics will be discussed.
FRP Goes Deep and Far
Tuesday, Mar 30 11:10 AM – 11:35 AM
Speakers: Firat Sever, Pipeline Division Manager, QuakeWrap, Inc., Tom Pullen, Associate, Brierley Associates
This presentation will discuss a proprietary fiber reinforced polymer (FRP) system (StifPipe®) with a case study on a stormwater tunnel repair. The 1.47-inch thick StifPipe® system was designed to more than 100 ft of soil pressure and is likely the deepest application of FRP in a pipe to date.
Challenging Tunneling Conditions During the COVID-19 Pandemic
Tuesday, Mar 30 4:20 PM – 04:45 PM
Speakers: Kyle Friedman, Geotechnical Engineer, Brierley Associates, Ryan Crum, Senior Engineer, City and County of Denver, Nick Strater, Trenchless and HDD Sectors Leader, Brierley Associates
A 21-inch sanitary sewer and an 84-inch storm sewer were installed via guided auger boring and a boring shield underneath four rail lines requiring permeation grouting prior to tunneling. The 84-inch tunnel construction was during the COVID-19 Pandemic, which complicated site work and required adaptive protocol by the design-build team.