Tunnel Business Magazine

APR 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.

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Page 12 of 47

TUNNELINGONLINE.COM TBM: TUNNEL BUSINESS MAGAZINE // APRIL 2018 B U S I N E S S B R I E F S The Olympic Games always shine a light on the host city and country, and on their ability to host such an event. The XXIII Winter Olympic Games in PyeongChang, South Korea, have come to an end, and as the glare fades, we can look back at some of the infrastructure work that was done to make the games possible. Located in Gangwon Province with its capital at Chunchen, the county of PyeongChang is bounded on the east part by the East Sea (Sea of Japan). The province's harsh landscape is domi- nated by T e many ski resorts exist as well as Buddhist temples. As part of Korean government's effort to expand transpor- tation infrastructure for the Olympics, Korea's high-speed rail- way system, known as Korea Train eXpress (KTX), has been ex- tended to PyeongChang for the Olympics by constructing new line: GyengGang Line. Due to the mountainous topography of Gangwon Province, the KTX extension project consisted of construction of 34 tun- nels, totaling 76 km in length, including two major tunnels: DaeGwanRyeong tunnel and G DaeGwanRyeong Tunnel The DaeGwanRyeng tunnel, 21.7 km in length, was con- structed by drill-blast and is the longest railway tunnel in Korea and the eighth longest mountain tunnel in the world. In order to minimize environmental impact to Taebaek onstructed at an average cover depth of 400 m with a maximum depth of 700 m. The tunnel excavation work began in June 2012 and was completed ember 2015 with a total construction cost of $500 million (USD). This project was separately awarded to three consortiums: Hyundai E&C, Halla Corporation, and Samsung C&T, by Kor A), the owner, on a design-build basis. GangNeung Tunnel G ve been com- pleted along the stretch of the extension project. The total length of the tunnel is 2.8 km and runs across the Gang- enter. A 1.2-km long section is an underwater tunnel excavated though the riverbe - er using an 8.4-m diameter slurry with an aver- age depth of 37 m. This project was awarded to Samwhan Corporation con- sortium by Kor A), the own- er, on a design-build basis. The tunnel excavation work be- ember 2015 and was completed in October 2016 with a total construction cost of $120 million (USD). The new GyengGang Line is now 120.3 km long and operates from Seoul to G and connects Incheon International Airport to G tion within two hours, providing more than 50% time saving compared to other transportation options. This article was contributed by the International Tunnelling and Underground Space Association (ITA). PyeongChang Behind the Scenes: Underground Works for Public Transportation

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