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.
ABOUT
Corrugated Steel Structure
Corrugated Steel Structure (CSS), first applied in North America in the early 1900s, has been installed in over 1 million locations worldwide. Over 100 years later, in 1996, Korea began using CSS through the efforts of POSCO, Korea Expressway Corporation, Seoul National University, and Hanyang University, facilitated by a specialized company's commercialization research. Since the 2000s, CSS has been extensively used in Korea for road crossings, waterways, local small rivers, animal migration ecological corridors, Rock and soil Sliding Prevent tunnels, and military protection facilities. This method, chosen for its ability to minimize disruption to existing vehicle traffic during construction and its economic benefits, has seen around 5,000 corrugated steel plate structures installed in Korea over the past 20 years, serving as an alternative to traditional reinforced concrete methods.
Initially, national design standards and specifications lacked detailed explanations of the construction method's various advantages and the growing demand. Furthermore, the focus was primarily on the mechanical behavior of reinforced concrete, a rigid structure, overshadowing the ductile nature of corrugated steel plates. This oversight led to intermittent issues, such as excessive deformation of corrugated steel sheets, stemming from an insufficient understanding of crucial factors like backfill material and compaction, coupled with a lack of professional engineering support.
In order to address these challenges, ChungAmEnC has actively engaged in research and development, collaborating with various organizations to enhance and update related standards. We have created and implemented design solutions and products that address potential construction issues, drawing on lessons learned from both domestic and international projects. Remarkably, we achieved an industry first by simultaneously obtaining NET (new technology) and NEP (new product) certifications. Furthermore, we have secured patents for the core technology of EXSCor in Europe, Canada, China, and Russia, with pending applications in 34 additional countries. Our firm stands out as a global exporter of advanced technology.
By adopting the BIM platform for Digital Twin Construction during the design phase, ChungAmEnC has significantly enhanced the structural integrity, enabling accurate predictions of each construction phase. This advance not only improves the future maintenance system but also paves the way for applying these innovations broadly. Furthermore, our provision of 3D Laser Scanning technology (Leica® System) and innovative landscape design solutions positions us to address the challenges of design uncertainty, construction anxiety, and aesthetic concerns that have troubled our customers. We are committed to offering the world's finest corrugated steel plate solutions, setting new standards in the industry.
Weapon system development (Tactical bridge, Assault bridge, Logistic Support Bridge)
In 2022, the Defense Acquisition Program Administration's Tactical Bridge-ⅡBlock-Ⅰ Weapon System Development Project recognized our company for its outstanding technology and management capabilities in system development, following a competitive proposal and bidding process. Consequently, we were selected as the preferred negotiation partner and successfully signed a contract. Furthermore, for the Tactical Bridge-Ⅱ, Block-Ⅱ weapon system, our core technology was again chosen during a competitive evaluation, ordered by the Defense Technology Advancement Research Institute, leading to another contract signing.
In 2023, our company's core technology, 'Long-span high-strength bridge design technology for mounting mobile vehicles', was recognized during a competitive proposal and bidding evaluation. This technology, essential for the bridge tank (assault bridge)-II, had been ordered by the Agency for Defense Development. Following this evaluation, we were selected as the preferred company for negotiations and successfully signed a contract.
Furthermore, in collaboration with POSCO, ChungamEnC is developing the Logistics Support Bridge by analyzing the requirements of both domestic and international military forces. As a global leader in corrugated steel plate technology, Chungam E&C aims to establish itself as a pioneer in dry gap-crossing systems within the field of engineering weaponry. By doing so, the company seeks to achieve technological patriotism, contributing to the advancement of K-Corrugated Steel and K-Defense industries.
