Trenchless Technology

OCT 2018

Trenchless Technology is the premier communications vehicle for the trenchless industry. Through our multiple platforms, readers receive insights into the trenchless industry, as well as keep connected to the latest news, products and projects.

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Page 28 of 91

W W W.T R E N C H L E S S T EC H N O LO GY.C O M 29 Ward and Burke Tunneling Inc. was awarded this project in June 2017. Located in an environmentally sensitive area due to construction within contaminated ground, this project in- volved the construction of a 3,460 lf of 60-in. storm sewer in four drives, •ive launch and reception shafts, two tie-ins and 460 lf of rehabilitation work of the existing 78-in. and 66-in. brick culvert via Channelline relining system. In order to re- duce the construction footprint in both hazardous and contam- inated ground, a value engineering proposal was agreed with the consultant and the client . The proposal included moving Shafts 2 and 3 originally located in contaminated •ill to Shafts 1A and 5A , in doing so separating tie-in shafts from reception shafts, greatly reducing the overall schedule. Tunneling was re- duced to two drives, the •irst drive containing two horizontal curves with a radius of 1,640 ft and 910 ft and being 2,400 lf in length. The second contained a vertical curve of 910 lf. During the construction of Shaft 1A , highly hazardous material was en- countered, which resulted in the drive length being increased by 322 ft to the revised location of Shaft 1, situated in non- hazardous native ground. The radius of the second curve was reduced to 754 ft to allow the tunnel alignment mine through Shaft 1A (changed from a reception shaft to an intermediate shaft), through the existing 66-in. brick and be received into Shaft 1, a total drive length of 2,722 lf. The high- strength mi- crotunnel pipe was manufactured by Forterra Pipe & Precast for use with the Herrenknecht AVN1500 Jackcontrol was in- stalled on the •irst 1,000 ft of tunnel . K i n g s b u r y R u n C u l v e r t R e p a i r Project Owner: Northeast Ohio Regional Sewer District Engineer: AECOM Contractor: Ward and Burke Tunneling Inc. Manufacturers/Suppliers: Forterra Pipe & Precast, Herrenknecht and Jackcontrol Value of Trenchless Project (US$): $9,871,800

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