Ohio's Double Shield launched after Onsite First Time Assembly
Jan 07, 2014
Near the banks of the Black River, a 7.0 m (23 ft) diameter Robbins Double Shield TBM and continuous conveyor system are starting up. The mammoth machine was built using Onsite First Time Assembly (OFTA) – a Robbins-developed method that saves contractors in shipping time, costs, and man-hours worked.
Using the OFTA approach, individual systems are tested prior to delivery but the machine is never fully assembled in the shop. Robbins field service technicians work on location with the contractor to assemble the machine and provide support. Launch for the 1.6 km (1.0 mi) Black River Tunnel took place on November 18th, 2013 - approximately 3 months after assembly began.
"OFTA was a challenging process for everyone onsite. We had to make numerous adjustments. Regardless, our team worked diligently to overcome challenges, and we were able to get the TBM assembled and launched relatively close to schedule," said Mike Garbeth, Project Manager for Wisconsin-based contractor Super Excavators, Inc. In addition to the TBM, Robbins supplied an in-tunnel continuous conveyor system and space-saving J-type vertical conveyor.
The Double Shield machine will be used in a unique manner as it bores. "We're expecting decent production with minimal cutter wear, as the drive is in a softer shale. We are installing ring beams and lagging, and there will be a final monolithic pour after tunnel completion," said Gregg Rehak, Tunnel Supervisor for Super Excavators. Rather than concrete segments, ring beams are being erected within the tail shield for installation as the machine passes.
As of December 2013, the machine has advanced approximately 60 m (200 ft) into the bore. "Tunneling started a bit slow while we made final adjustments to the TBM and conveyor assembly, but mining has picked up and we are beginning to reach anticipated production rates," said Garbeth.
The major components of the Black River Tunnel include the launch shaft and reception shaft – approximately 11 m (36 ft) in diameter and 50 m (165 ft) deep – and a 1.7 km (1.0 mi) tunnel with a finished diameter of 5.8 m (19 ft). Ric-Man Construction was subcontracted to build the shafts. The project route runs along city property roughly parallel to the Black River, beginning at the launch shaft near the Black River Wharf and terminating near the Lorain Black River Wastewater Treatment Plant. A screening facility will be built at one end near the wastewater treatment plant, where water will be diverted into the storage tunnel, and a pump station will be constructed at the launch shaft site. When complete, the pump station will move water from the storage tunnel back into an existing sewer interceptor.
Mining is expected to be completed by spring 2014 and final project completion is set for 2015. When finished, the tunnel will have a storage capacity of 42 million liters (11 million gallons) per day, providing a significant boost in water quality for the city of Lorain.
More News and Articles
Oct 02, 2023
A utility detection equipment specialist shares his expert tips on understanding electromagnetic field (EMF) locators, the importance of training, and how to work with manufacturers.
Sep 29, 2023
Researchers from the University of Illinois Chicago have proposed a “dual-pipeline” solution to address the region’s water supply issues. The system would feature one line supplying industrial sites with treated wastewater and another conveying drinking water to homes and other …
Sep 27, 2023
New e-learning module of the course BE-07 Investigation and Inspection of Sewers and Pipelines now available on UNITRACC!
Sep 27, 2023
Any water loss through leaking pipes is unacceptable in the eyes of the public, and on the launch of a deep-dive leakage report from Ovarro, technology leader for leakage solutions, Barbara Hathaway, explains how technologies continue to advance.
Sep 25, 2023
Pumping liquids may seem like a solved problem, but optimizing the process is still an area of active research. Any pumping application—from industrial scales to heating systems at home—would benefit from a reduction in energy demands. Researchers at the Institute …
Sep 22, 2023
PPXXI Conference and Exhibition welcomes McElroy Manufacturing, Inc. as the mobile app sponsor. Their sponsorship enhances networking opportunities for the delegates. Scheduled over September 25 -27, 2023, in Lake Buena Vista, Florida, PPXXI is the key technical and business event …
Sep 20, 2023
Aquatech is the leading water technology show in the world, with over 800 exhibitors and expecting over 22,000 visitors from over 140+ countries.
Sep 18, 2023
Designed to reduce pollution in Lake Erie by four billion gallons per year, Project Clean Lake is a 25-year plan being overseen by Cleveland's Northeast Ohio Regional Sewer District (NEORSD). When construction crews complete the $3 billion undertaking in 2036, …
Sep 13, 2023
Mullane once again proved why the company is an industry leader in pipeline solutions with a relining project on the mid north coast of New South Wales.
Sep 11, 2023
Pezzimenti Trenchless continues to showcase its position as a leading trenchless specialist by completing works on two Victorian projects.
Sep 08, 2023
Silvertown Tunnel under Thames - Newham to Greenwich near O2 Arena: See two massive boreholes in east London
The second of two boreholes beneath the Thames – which will together form London’s new Silvertown Tunnel – is now complete.
Sep 04, 2023
Report highlights American Water’s sustainable impact on communities across the U.S.