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.
Solution 3D displacement measurement
3D Laser Scanning LiDAR (Light Detection & Ranging)
Point cloud data is formed with 3D location information acquired by LiDAR method, and the acquired data is 4D coordinates (X, Y, Z and GIS) to calculate the distance, phase difference, and volume of the object . The development of 3D laser scanning technology overcomes the limitations of measurement and maintenance, and In addition to establishing BIM standardization, effective construction management, construction, and maintenance using 3D data is possible . Semi-permanent data based on reality is used for structure maintenance, reverse engineering and modeling of old structures, and incident/accident site preservation and investigation through preservation, comparison, and analysis. It is used as basic data in the field. Our company performed the internal and external 3D scan project of the Sewol ferry for the first time in Korea. Even in the case of an incident, accurate measurement information is used for 'illegal design change and investigation of the cause of the sinking' of the Sewol ferry.
Existing measurement methods often relied on manpower and it was difficult to obtain information on various surrounding environments. can be used By identifying design errors, minimizing construction quantity errors, and predicting construction errors, it is possible to efficiently manage construction sites at construction sites, and even after completion, comprehensive structure maintenance including changes in the surrounding environment is possible. In particular, it ensures the stability of the structure after completion by accurately measuring the displacement for each stage of backfilling of corrugated steel sheet .