Corrugated Steel Structure (CSS), which was applied in North America in the early 1900s and has been installed in more than 1,000,000 places worldwide, has been in service since 1996, 100 years later, in Korea with POSCO, Korea Expressway Corporation, Seoul National University, Hanyang University, etc. It has been applied to the domestic market through commercialization research by specialized companies. Based on this, since the 2000s, it has been widely applied to road crossing passages, waterways and local small rivers, animal movement ecological passages, and Piam tunnels. Based on the advantages and economic feasibility of minimizing the existing vehicle traffic control during construction, it is a universal new construction method along with the existing reinforced concrete construction method. About 5000 corrugated steel plate structures have been installed and operated in Korea for 20 years.
However, regarding the various advantages of the construction method and the rapidly occurring demand, in the beginning, detailed explanations of the national design standards and specifications were insufficient. Problems such as deformation of the corrugated steel sheet occurred intermittently due to the lack of understanding of the backfill material and backfill compaction, which are the most important factors in
To improve this, ChungAmEnC has continuously improved and supplemented related standards through R&D with various related organizations, and based on domestic and foreign failure cases, provides optimized design solutions in advance for possible problems during actual construction. Optimized solutions include Virtual Construction: a three-dimensional system for step-by-step forecasting processes. (BIM LoD: 350 / Tekla, Trimble) and 3D Scanning (Leica P30 System, Cyclone ) Minimize errors that may occur at each construction stage I did. In addition, by providing 3D FEM, 3D printing and landscape design solutions, we will do our best to become a company that continuously develops and provides the world's best solutions that overcome the uncertainty of design and construction anxiety that customers have felt.
History of CSS
In 1896, an American civil engineer James. H. Watson and Starting with Stanley Simpson's patent, it was applied to small drainage channels in North America until the 1930s, and by the late 1900s, the maximum span was applied up to 11m and expanded to small bridges, passageways, and military facilities (ammunition depots). Since the 2000s, the span has been extended to 23m and applied to ecological tunnels, mine stockpiles, reclaim tunnels, and military facilities (hangars). 2014-2016 R&D and commercialization of extra-corrugated corrugated steel sheet (EXSCor) of Cheongam EnC With success, the maximum span was extended to 40m. It satisfies the maximum loads of CAT 797F (about 620 tons), EURO LM71, mine trucks, which could not be applied in the past with respect to live loading along with the expansion of span, so that it is economical, stable, and workable than concrete structures in multi-step processes. has enough competitiveness. In addition, extra corrugated steel sheet (EXSCor) is listed as a construction method and product according to design standards in Korea (KDS, KCS) as well as AASHTO LRFD and ASTM A796M in the United States.
Tactical Bridge-Ⅱ, Armored Vehicle Launched Bridge, Logistic Support Bridge
Military Gap-Crossing Bridges
1. Tactical Bridge-Ⅱ What is Military Gap-Crossing Bridges system development?
It is a temporary bridge that is quickly installed on broken bridges or ravines in wartime to move tanks, etc., and is operated without contact with the enemy but under the threat of howitzers. The Army's mobility support activities, which enable tactical and operational maneuvers of mobile units while overcoming various gaps (canyons, bridges destroyed by the enemy) that limit friendly forces' mobility, are important elements of decisive integrated operations, and are an important element of integrated operations according to the operational plan. Securing tactical bridge-II bridge assets that meet regional operational concepts and required capabilities is an essential weapon system for Korea military.
ChungAmEnC was recognized by the Defense Acquisition Program Administration and related organizations for its excellent technology and business development management capabilities, and was selected as a preferred negotiation company in August 2022, and was awarded the Defense Defense Contract in December of that year. We plan to complete the system development project by 2026 by signing a contract with the business office as the lead company. Through this,Army We will complete the tactical bridge-II military development, which has been a long-awaited project of the engineers. In addition, partner institutions/companies comprised of experts in the field include Hyundai Everdigm, Korea Construction Research Institute, Seoul National University of Science and Technology, Dankook University, Army Association Ground Forces Research Institute etc., and the Defense Acquisition Program Administration. It is being developed under control, and is being developed through technical collaboration of steel materials and vehicles suitable for tactical bridge-II from POSCO and Kia Motors' military special vehicle division.
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2. What is the core technology of ‘long-span high-strength bridge design technology for mobile vehicles’?
A bridge that is quickly installed on broken bridges or ravines in wartime to move tanks, etc. is a temporary bridge that is in contact with the enemy and is operated under the threat of direct fire/howitzer fire.stormThis is the Armored Vehicle Launched Bridge (AVLB).
Through core technology research and development ordered by the Defense Technology Promotion Research Institute, we are researching and developing bridge assemblies, a core technology, to increase the MLC (Military Load Classification) of assault bridges and expand construction length, and to develop future bridge tank-II systems and We will contribute to the development of gap-overcoming equipment for armored vehicles. It was selected as a preferred negotiation company in July 2023, and in December of that year, it signed a contract with the Agency for Defense Development as the lead company, with plans to complete core technology projects by 2026. Collaborating institutions/companies comprised of experts in the field are being developed jointly with INHA University, MYUNGJI University.
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3. What is the 'Logistics Support Bridge - II'?
During World War II, Sir Donald Bailey of the United Kingdom developed a military bridge for transporting military supplies, which became widely utilized worldwide and was named the Bailey Bridge. The South Korean military inherited the M2 Long Span Assembly Bridge (Bailey Bridge) from the U.S. military during the Korean War and has been operating it to this day. It is primarily used for transporting military supplies and semi-permanently restoring damaged bridges in rear areas.
To ensure sustained operations for maneuver units during wartime and to address non-combat threats such as disasters during peacetime, outdated long-span assembly bridges need to be replaced with logistics support bridges, which enhance operational and usage efficiency. As a long-span assembly bridge, the logistics support bridge is designed to transition tactical bridges to the frontlines, maintain supply routes to ensure operational continuity and support maneuver units. It also facilitates the rapid restoration of supply routes and provides emergency bridge installations in civilian areas affected by disasters.
POSCO and ChungamEnC are conducting and completing preliminary research to enhance domestic technological maturity, thereby contributing to the military’s modernization efforts.
