November 10, 2021 – The North American Society for Trenchless Technology is pleased to announce the winners of the 2021 NASTT Outstanding Trenchless Paper Awards for Rehabilitation and New Installations. These awards recognize excellence by commending authors of the best NASTT No-Dig Show papers each year. The winning papers were presented at the 2021 NASTT No-Dig Show in Orlando, Florida.
2021 Outstanding Paper: Rehabilitation
Columbia Canal Brick Arch Tunnel Geopolymer Lining in South Carolina Joe Royer, Ph.D., Vice President R&D, GeoTree Solutions, LLC, Spartanburg, SC Bill Sharpe, Business Development Manager, Inland Pipe Rehabilitation, LLC, Columbia, SC
Five years prior to the main project, the owner did an early technology evaluation and pilot project. “This gave us the opportunity to show the current larger effort as well as the success of the earlier projects,” explained Joe Royer. “The support of the asset owner on the difficult access issues on the project also helped shape the narrative.”
The paper brings attention to the use of geopolymers and spray-applications as an important part of the trenchless industry. “The work we at GeoTree Solutions and our contracting partner on this project IPR have done to develop the technology showcase viable solutions for large diameter projects.”
Columbia Canal Brick Arch Tunnel Geopolymer Lining in South Carolina is featured in the fall issue of Trenchless North America.
2021 Outstanding Paper: New Installations
HDD Lessons You Can Only Learn in the Field
Kimberlie Staheli, Ph.D., P.E., Staheli Trenchless Consultants, Seattle, WA
Jake Andresen, P.E., Staheli Trenchless Consultants, Seattle, WA
“I have thought about putting this together for years,” says Kimberlie Staheli who was introduced to trenchless technology on her first job after college with a microtunneling contractor. “The industry was so new that it really excited me. The more I learned, the more I realized that I had a shot of making a difference.” Staheli has seen the industry in an ongoing state of rapid transformation for more than 20 years and believes it is an industry where an engineer can continuously learn and grow.
“I see engineers specifying things that are not constructable. Then when we get there to perform Risk Management InspectionTM, we have to work through the issues in the field. I wanted engineers to be aware of how the designs need to be changed in the field to avoid claims.”
HDD Lessons You Can Only Learn in the Field will be featured in the winter issue of Trenchless North America.
The winning papers (and all the NASTT No-Dig Show papers) are available in the NASTT Knowledge Hub .
Authors of both papers will give encore presentations at the 2022 NASTT No-Dig Show in Minneapolis, Minnesota.
October 2020—Crosslink Technology Inc. has developed PIPE (Pressure Infused Protective Epoxy) Cure, a fast, easy, and cost-effective way to completely rehabilitate the inside of underground pipes, specifically laterals.
PIPE Cure provides a less destructive and less costly alternative to digging out underground pipes for repair, and it also provides unique advantages over the traditional CIPP (Cure in Place Pipe) restoration products.
While CIPP is a widely used trenchless technology, it can use unsaturated styrenated polyester resin, which may give concern to volumetric shrinkage, odor, adhesion/strength, and sensitivity to temperature.
Crosslink Technology Inc.’s PIPE Cure has been formulated to have:
Excellent strength and adhesion (flexural modulus of over 500,000 psi and flexural strength of 7000 psi)
Exceptionally low linear shrinkage (0.0001 inch/inch)
No odor
Ability to cure in underground temperatures as low as 10°C/ 50°F (without a heat source AND regardless of the ambient temperature when it was mixed)
Excellent wetting out of fiber in the liner
Better health and safety rating than styrene
With Crosslink Technology’s PIPE Cure, you will get a safe, easy, budget-friendly cure for your underground pipe repair problems.
About Crosslink Technology Inc.:
At Crosslink Technology Inc., we deliver innovative thermoset solutions which make a real difference to our customers’ business. We produce a wide range of Epoxy and Polyurethane applications and Custom-cast Electrical components which lower processing costs, improve product quality, and boost profitability.
Since 1981, we have dedicated ourselves to staying on the leading edge of technical innovation, creating solutions tailored to customer needs and processes.
Today our dedicated and knowledgeable workforce produces applications embraced by companies in the United States, Mexico, Australia, and the Far East.
For More Information: Christa Foy Product Manager Crosslink Technology Inc. 6380 Viscount Rd. Mississauga, ON L4V 1H3 Canada Cell: (437) 244-7620
View what a ‘typical’ day of pre-chlorinated pipe bursting looks like when replacing water main in a residential neighborhood. This pipe burst entails replacing 650 feet of 10-inch cast iron water main with new 10-inch HDPE pipe.
It’s generally stated that static pipe bursting uses 85% less excavation than open cut when replacing water main. But what are the real numbers on an actual project?
Static pipe bursting uses 11 times less excavation:
Looking at the math of how we get to 11 times less excavation using static pipe bursting to replace water main.
Murphy Pipeline Contractors
12235 New Berlin Rd
Jacksonville, FL 32226
Headquarters: 904-764-6887
Feasibility Support: 414-321-2247
South Florida: 954-842-4771
Tough TBM breaks through after navigating Faults, Karst, and More
In January 2020, a Robbins 5.97 m (19.6 ft) diameter Main Beam TBM cleared its final hurdle when it broke through in Guangxi Province, China. The TBM excavated its first of two tunnels, an 11.9 km (7.4 mi) long conduit for Lot 1 of the North Line Water Irrigation Project, Letan Water Reservoir, Drought-Relief. The tunnel was marked by a gauntlet of challenges, from karst cavities to fault zones and water inflows. The workers on the jobsite, contractor Guangdong No. 2 Hydropower Bureau Co., Ltd., and the owner, Construction Management Bureau for the Letan Water Reservoir, had much to celebrate after completion of what is widely regarded as the most complex and longest tunnel on the North Line project.
Boring with the Robbins Main Beam TBM and continuous conveyor system began in summer 2015. “There was no precedent in this province for using a Main Beam TBM to excavate a tunnel longer than 10 km. We didn’t have relevant local experience to use for reference,” explained Yongjiu Jin, Deputy Manager of the Project for contractor Guangdong No. 2 Hydropower Bureau Co., Ltd. The machine did encounter a number of difficult geological obstacles as it bored through limestone rock, but was still able to achieve advance rates up to 40 m (130 ft) per day in good ground.
Much of the geology consisted of lightly weathered limestone in rock class II to III, with some sections in class IV to V rock that required the heaviest amount of ground support, ranging from rock bolts to ring beams and mesh. “Our team encountered a coal seam, gasses in the tunnel, two large water inrushes, three fault zones up to 103 m long, 11 karst cavities, and more. In order to solve the ground problems, there were more than 160 special technical research meetings held,” said Yongjiu.
Throughout tunneling, the contractor expressed thanks for Robbins Field Service staff. “Robbins personnel provided good technical support from equipment installation and commissioning through to tunnel completion. After the equipment was handed over to our company, they still helped us with equipment usage on our project, which makes us very satisfied with the Robbins after-sales service. Robbins really delivered: the after-sales phase was not the end of service, but the beginning of site service,” said Yongjiu.
While the completion of the first tunnel—the longest single-heading construction on record for water tunnels in Guangxi—is a milestone, there is more to do. The Robbins machine will be inspected and relaunched to bore a second tunnel 4.2 km (2.6 mi) in length. The ground conditions are predicted to be equally challenging, but the tunneling operation has some help from ground prediction methodology. Tunnel Reflection Tomography (TRT)—consisting of ground prediction using seismic waves—is being used to detect changing conditions ahead of the TBM. The method can predict the distribution and scale of joints and fissures, allowing the crew to plan ahead.
Located near Laibin City, the North Line project provides much needed drought relief using a network of tunnels totaling 29.4 km (18.3 mi). “This tunnel will realize the dream of drought control that people in Central Guangxi have had for many years. The breakthrough is the most important milestone event in this first phase of the North Line project,” said Yongjiu.
Image 1: Contractor Guangdong No. 2 Hydropower Bureau Co., Ltd., the project owner, and Robbins celebrate the January breakthrough of a Robbins Main Beam TBM.
Image 2: The 5.97 m (19.6 ft) Robbins TBM traversed fault zones, karst cavities, a coal seam, and more while achieving up to 40 m (130 ft) in one day.
Image 3: Robbins Field Service and Engineering staff played an important role in the project’s overall success. They advised the contractor and gave after-sales support throughout the difficult ground conditions.
Image 4: The Robbins Main Beam TBM bored through limestone rock, and installed a full range of ground support, from rock bolts to ring beams and wire mesh.
Cleveland, Ohio – The North American Society for Trenchless Technology (NASTT) celebrates 30 years of industry advocacy and education in 2020. NASTT is an engineering society of individuals, public organizations and private companies with strong beliefs in the practical, social and environmental benefits of trenchless technology.
Founded in 1990, NASTT represents nearly 2,400 members throughout the United States, Canada and Mexico who all promote better and more responsible ways to manage underground infrastructure. NASTT’s mission is to advance trenchless technology and to promote its benefits for the public and the natural environment by increasing awareness and knowledge through technical information dissemination, research and development, education and training.
As NASTT continues to grow and take on new challenges, it is important for the not-for-profit Society to serve and support their diverse industry partners. NASTT proudly represents municipalities and public utilities, consultants and engineers, manufacturers and suppliers, trenchless contractors and academia. NASTT reaches out to all these groups and shares with the community the latest industry trenchless advancements and their continuing education opportunities. For 30 years, the all-volunteer members of NASTT have presented non-commercial information seminars and training about these “green alternative” engineering methods to North American communities.
The annual NASTT No-Dig Show is the Society’s flagship educational and networking event. This conference and trade show offers 160 quality, non-commercial technical papers; an exhibition hall with more than 200 trenchless companies displaying their products and services; a series of specialized trenchless training courses, plus many entertaining networking events and special industry related awards. The NASTT No-Dig Show is the largest trenchless technology conference in the world averaging over 2,000 industry professionals.
In 2019 the Canadian Regional Chapters of NASTT hosted the inaugural No-Dig North conference. Nearly 600 attendees from across Canada met in Calgary, AB to learn from each other, network and discuss all things trenchless. This show will be an annual event with the 2020 No-Dig North being held October 19-21 in Vancouver, BC.
In celebration of its 30th Anniversary, NASTT will look back at the history of the Society with a series of Flashback Friday (#fbf) social media posts along with various activities throughout 2020. You are invited to join in a celebratory toast during the NASTT 2020 No-Dig Show Opening Ceremony Ribbon Cutting in Denver, Colorado on Monday, April 6 at the Colorado Convention Center.
Tri-State Utilities enters their 30th year of operation in 2020. As they look forward to new leadership and direction, they are excited to announce the following promotions and present their management staff.
Tri-State Utilities is pleased to announce that Jonathan Thomas, PE has been promoted to Vice-President / General Manager and will lead them into the new decade. With 10 years of project management experience at Tri-State Utilities, Jonathan will be overseeing the Chesapeake, Virginia and the Winston-Salem, NC offices. The addition of Jonathan to the Senior Management team will position the company for continued growth in Virginia, North Carolina, and South Carolina.
Ron Parsons has been promoted to Vice-President of Operations. With 15 years of experience at Tri-State Utilities, Ron will now lead field operations to bring a continued expertise in Cleaning & CCTV services and CIPP (Cured-In-Place Pipe) Lining. Ron started his career as a Vactor operator and has held positions as a CIPP cutter operator, CIPP Foreman and Superintendent. Ron has invaluable experience cleaning and lining pipe of all sizes and possesses great personnel management skills.
Craig Welsh will now lead the Estimating Department in addition to his role as a Project Manager. With 16 years of experience at Tri-State Utilities, Craig will oversee an estimating department that will focus on Cleaning & CCTV services, CIPP (Cured-In-Place Pipe) Lining, and traditional open-cut storm, sewer, and water line services. Craig’s experience with site work as well as rehabilitation methods provides him with a unique skill set for providing accurate estimates for Tri-State to build.
John Saintsing is the Business Development Manager for Virginia, North Carolina, and South Carolina. With seven years of experience at Tri-State Utilities, John will continue to explore new, better and innovative methods for CCTV services and CIPP (Cured-In-Place Pipe) technologies. John’s responsibilities will include attendance to industry conferences, building key customer relationships, and developing new services and products in Infrastructure Rehabilitation.
Sean Merryman was hired last year as the Business Development and Project Manager for the southwest North Carolina region and South Carolina. Sean will maintain a heavy presence in the area while establishing a new lining crew and Clean & TV crew to service this growing region. Tri-State Utilities is very excited about the experience Sean brings with him from his previous employer and the opportunity to service municipalities and engineers who have historically been outside of our footprint.
Connor Mathis is a Project Manager with eight years of experience at Tri-State Utilities. Connor will manage projects throughout Virginia, North Carolina, and South Carolina while focusing most of his time on the Construction Services contracts for the Cities of Norfolk and Virginia Beach. These services include: Cleaning and CCTV, CIPP Sectional Liners, Rausch Repair Sleeves, and CIPP (Cured-In-Place Pipe) for Storm and Sanitary Pipe Rehabilitation. Connor is also certified in land disturbance and manages all heavy excavation work, road repairs and off-road ditch maintenance.
James Farris is a Project Manager with a total of six years of experience in utility construction and the last four years with Tri-State Utilities. He has gained valuable experience on Consent Order driven inspection and rehabilitation of storm and sanitary sewer systems. Before coming to work at Tri-State Utilities, James spent four years with Real Estate Improvement, a Virginia Beach based Class A construction company. Prior to that, James was with Norfolk Southern Railway for eight years focusing his efforts primarily on customer service, purchasing, and sales.
Rick Sharp is the newest member and Project Manager of the Tri-State Utilities’ team. Rick brings with him over 15 years of project management experience from residential and commercial construction as well as land development. Rick will be managing projects throughout Virginia, North Carolina, and South Carolina.
Andy McSweeney will continue to lead Tri-State Utilities as Vice-President of Project Management with a focus on Estimating and Business Development as they grow their footprint deeper into North and South Carolina.
Joe McSweeney, after 27 years of service with Tri-State Utilities, has decided to retire. A career that included responsibilities of a CCTV Operator, CIPP Foreman and Superintendent, and Vice-President of Operations. A career full of accomplishments and a future full of possibilities. Tri-State Utilities wishes Joe much more success in his future endeavors.
The management team of Tri-State Utilities is can all be reached at (757) 366-9505. Visit their website for more information on the company.
It’s generally stated that static pipe bursting uses 85% less excavation than open cut when replacing water main. But what are the real numbers on an actual project?
