Tunnel Business Magazine

OCT 2018

TBM: Tunnel Business Magazine is the market leader for North America. TBM is written for leading professionals in all aspects of tunneling and covers project stories, design elements, contracting strategies, legal issues, new technology and more.

Issue link: http://digital.tunnelingonline.com/i/1042145

Contents of this Issue


Page 40 of 47

Lower P ed up and successfully relaunched within the White River Tunnel. As of September 2018, mining of the White River Tunnel alignment has extended a total of approxima omplete in the 9,850-ft WR- 06A spur ently being backed down the spur and will be relaunched up the main White River alignment in October. Based on the terms of a federal consent decree, the White River and Lower Pogues Run tunnels must be operational by the end of 2021. Key Project Personnel – .E.; Assistant Proje oject Engineer: Percy Townsend; yle Shickles; Equipment Superintendent: Keith Walter; Field Engineers: Eric Haacke, Zack Heinrich, Kendall Gadd, Inspection PM: Sam Cain, P Gr , P.E.; Supervisor Special Projects: Tim Shutters; Construction Supervisor: John MARYLAND Germantown Father Hurley Boulevard – Emergency Repair Turn-Key Tunneling Following the collapse of a major thoroughfare just outside of Gaithersburg, Turn-Key Tunneling has been contracted to install a new 84-in. host liner. The new steel liner will be installed using traditional hand-tunneling techniques and will provide the needed support for the final 60-in. carrier pip ed-faced conditions have been encountered, which have been mitigated and has had minimal impact on the schedule. The project is slated to be complete in October. Montgomery County/Prince George's County Purple Line Light Rail Project Purple Line Transit Partners (PLTP) The Purple Line is a 16.2-mile light rail transit line extending from Bethes arrollton in Prince George's County. It is being delivered via a $5.6 billion P3 contract that includes a $2.1 billion design-build construction contract. The line connects major activity centers located inside the heavily congested Capital Beltway, and will provide direct connections to four branches of the A orail system (both branches of the Red Line at Bethesda and Silver Spring, the Green Line at College Park, and the Orange Line a arrollton), as well as all thre C commuter rail lines (linking Washington, Baltimore, and Frederick, land) and Amtrak's Corridor. TP was received on June 17, 2016. The revenue Service Availability (RSA) da ch 11, 2022. The scope of work includes a twin-track light rail system operating mainly at grade in dedicated or exclusive lanes and 21 stations. The route includes 0.7 miles of elevated guideway and 1,020 lf of tunnel excavated by e is also a shaft and cavern to be constructed in bedrock in Bethesda that will serve as interface between the future Purple Line and the existing underground A station. About 45% of top heading excavation is complete f unnel. Excavation of the bench is anticipated to begin in January next year. The ground conditions at tunnel horizon encompass mixed face conditions varying from slightly weathered metamorphic rock to completely decomposed rock known as sapr of the tunnel runs below the groundwater table. Design-Build Contractor: Purple Line Transit Constructors (PLTC), an LLC comprised of Fluor, Lane, and Traylor Bros. Tunnel Designer: Project Personnel – A Project Director: William Parks; Concessionaire's Proje red Craig; PLTC: Proje Sc en Prince; Underground c Wehrli. MISSOURI St. Joseph Black Snake Creek Stormwater Separation Improvement Project – Tunnel Package Super Excavators, Inc. The work for this $26.991 million project generally consists of the construction of 90-in. diameter concrete precast segment lined 6,648-ft long tunnel, 37-ft diameter baffle drop shaft, 48 ft of near surface reinforced concrete box culvert, 2-ft diameter vent shaft, 181 ft of 90-in. diameter open-cut steel pipe installation, 125 ft of 90- in. jacked steel pipe, an energy dissipation structure, site restoration, and performance of other associated works. As of late September d, with crews lowering the gantries and trailing gear into the shaft. Roughly 30 segment rings have been installed, which is equivalent to approximately 120 lf. Production mining will commence once the is completely launched. 95% of all the segments have been delivered to the project site from CSI. The work is completed at the energy dissipation structur project. This work was completed two months ahead of schedule. 4 1 TUNNELINGONLINE.COM TBM: TUNNEL BUSINESS MAGAZINE // OCTOBER 2018 T U N N E L U P D AT E S

Articles in this issue

Archives of this issue

view archives of Tunnel Business Magazine - OCT 2018