Cheong Poong Bridge ( ko, 청풍대교) is a cable-stayed bridge which crosses the lake formed by
Chungju Dam
The Chungju Dam is a gravity dam on the Namhan River, northeast of Chungju in Chungcheongbuk-do Province, South Korea. The purpose of the dam is flood control, water supply and hydroelectric power generation. Construction on the dam began in 1978 ...
(part of the Namhan River system, a tributary of the
Han River) in
North Chungcheong Province
North Chungcheong Province ( ko, 충청북도, ''Chungcheongbuk-do''), also known as Chungbuk, is a province of South Korea. North Chungcheong has a population of 1,578,934 (2014) and has a geographic area of located in the Hoseo region in the s ...
,
South Korea
South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korea, Korean Peninsula and sharing a Korean Demilitarized Zone, land border with North Korea. Its western border is formed ...
on Route 82 in that region.
The bridge project began in December 2004 and was scheduled to be completed in September 2010, to replace an existing PSC box girder bridge which had required periodical rehabilitation and repair work. As the area where the bridge was constructed has well-known natural scenery and attractions, it designed to support tourism development plans.
["Construction of Hybrid Cable-Stayed Bridge",D.G Kim, H.C Kwon, K.J. Lee, IABMAS, 2010]
Construction and design
The bridge was built by contractor Daelim Industrial Co., LTD, at a contract price of 40.3 million USD.
[“Daelim bridge 2013 http://www.daelim.co.kr/static/data/brochure_eng.pdf] Concrete pylon height with typical H-shape is 103m and constructed by auto climbing form. The main span of 327m across the lake is constructed using the free cantilever method and the side span of 57.5m is constructed by the full staging method.
The combination of composite section (reinforced concrete deck and I-shaped steel girder) for the center span and concrete section for side spans applied to the bridge because of decreasing effect of weight balance. Concrete pylon has typical H-shape. The leg shape beneath the superstructure level, on the other hand, needs to be narrow down a little bit to make the size of foundation smaller mainly for less rock excavation at foundation locations and better handling of construction unit (caisson) considering the site condition. Cable is a multi strand system as two planes semi-fan. An extra pier support in each side span has been applied. To maximize the counter weight effect by concrete girder at side span, it is necessary to make the side span heavier as possible and not to have excessive bending moment by increasing dead load at the same time. Here, the extra pier support gives more opportunity for having more weight and stiffness in side span without resulting in excessive bending moment in girders and pylons.
["Design of Cheong-poong bridge (Steel-concrete Hybrid cable-stayeg)", D-H. Yoo, J-S. Ko and C.Moon., 3rd International Symposium on Steel Structures, March 2005]
Gallery
File:Cheong Poong (1).JPG, Cheong Poong Bridge _View1
File:Cheong Poong (2).jpg, Cheong Poong Bridge _View2
File:Cheong Poong (4).JPG, Cheong Poong Bridge _View4
See also
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Transportation in South Korea
Transportation in South Korea is provided by extensive networks of railways, highways, bus routes, ferry services and air routes that traverse the country. South Korea is the third country in the world to operate a maglev train, which is an automa ...
*
List of bridges in South Korea
This is a list of bridges and viaducts in South Korea, including those for pedestrians and vehicular traffic.
Historical and architectural interest bridges
Major road and railway bridges
This table presents the structures with spans greater ...
References
{{Reflist
Cable-stayed bridges in South Korea
Bridges completed in 2010
Buildings and structures in North Chungcheong Province