Page 52

2017WinterShotcreteEMag

2016 Honorable Mention 2018 PyeongChang Winter Olympics Sliding Track By Kyong-Ku Yun, Yong-Gon Kim, and Kyu-Woon Lee The 2018 PyeongChang Winter Olympic sliding center is a structure built in PyeongChang-gun, Gangwon Province, to host bobsleigh, luge, and skeleton events. It is currently hosting test events. This sliding center was constructed from January 2014 to October 2016, occupying an area of about 37 acres (150,000 m2). Shotcrete construction on the main track was completed in a short period of time—from July 2015 to January 2016. Figure 1 shows a bird’s-eye view of the sliding center. The track production sequence included: • Placing the formwork; • Installing the curve retention screed pipe; • Floor shotcrete placement; • Removal of rebound material from the space between the floor and the wall; • Wall shotcrete placement; • Surface finish with a temporary screed pipe; • Surface finish after the removal of temporary screed pipe; • Surface treatment; and • Wet curing. TRACK MOCKUP TEST For the mockup test, a full-sized mockup with a reduced 16 ft (5 m) length was constructed by simulating the transition curve section of the bobsleigh track. Two initial mockup tests were conducted at Kangwon National University, and the final mockup was built at the PyeongChang Alpensia site with inspection by FIBT and FIL. The main mockup test was conducted from May 22 to June 6, 2014. On June 4, 2014, the main mockup was built by Daesang E&C Co. LTD, constructors of the track, with the help of Dr. Kyong-Ku Yun, Professor of civil engineering at Kangwon National University, Chuncheon, Korea, and with additional consulting by Dr. D. R. Morgan, P.Eng., FACI (Fig. 2). SHOTCRETE MATERIALS The main purpose was to develop a structural shotcrete with high strength and high durability by incorporating admixtures. Air content and slump test were measured to assess the basic properties of the concrete. Strength characteristics of the material were evaluated by compressive Fig. 1: Overview of the sliding track 50 Shotcrete | Winter 2017 www.shotcrete.org


2017WinterShotcreteEMag
To see the actual publication please follow the link above