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 Vertical shaft & horizontal shaft
Corrugated Steel Sheet Vertical Sphere & Horizontal Shaft CSS Vertical Shaft & Horizontal Adit
The vertical sphere is a structure used for ventilation, disaster prevention, and work accompanying the installation of a long tunnel. The existing cast-in-place reinforced concrete method involves assembling reinforcing bars and installing a form to pour concrete. There is a problem that the quality is deteriorated, the risk of safety accidents due to rebar assembly and dismantling of formwork at high locations is high (5 safety accidents and 5 deaths during SRT vertical construction in 2016), and the construction period is excessive.
Adit are to proceed in a vertical sphere and a tunnel connecting the main road tunnel, cast-in-place process that is largely extended is composed of less than 50m, when extended long, the method and the short section extending to create a tunnel mold separately is universally applicable must do. However, during the construction of tunnel formwork or cast-in-place, it was a small process due to the difficulty of being able to perform the process through the vertical hole, but there was a problem that the construction period and cost had to be invested more than expected.
The vertical sphere of corrugated steel plate is ① on the ground with a modular corrugated steel plate ➞ ② The stair room, air conditioning room, and the necessary installations for work are installed and assembled on one modular corrugated steel plate ➞ ③ Using a crane, on the lower modular corrugated steel plate ➞ ④ Flange It is a new construction technology (No. 804 “Flanged corrugated steel plate used to assemble and modularize vertical spheres on the ground”) construction method that joins and assembles them in this way. It is a method of improving safety because it not only improves the compressive strength, flexural strength, and waterproof performance of the module-to-module joint, but also shortens the construction period and does not work at height.
Transverse shaft (inner side) install
Air conditioning room ground assembly
The transverse shaft connecting the main track and the vertical shaft is applied in ① assembling the corrugated steel plate inside the excavated tunnel ➞ ② through the pre-fabricated grouting holes in the upper and side parts of the corrugated steel plate ➞ ③ pouring and pouring concrete on the back side It is a new technology (No. 804) construction method. It serves as the corrugated steel plate itself rigid and dice the method for finishing 0 kinds from the inside is the construction period is shortened when compared to the multi-step process (reinforcement, mold, Shore, cured), such as concrete, to the right, Ltd. quality ① design ➞ ②Based on three-dimensional measurement (Leica P30®, Cyclone®, ±3mm) of the temporary facilities installed and excavated before (checking over-digging and unexcavated) ➞ ③After drawing up the production drawing, precisely manufactured at the factory It's a technique to do. In Korea, using our construction method, since 2015, 14 SRT, Gimpo Urban Railway, etc. are under construction and public use. In addition, unlike the concrete construction method, the transverse shaft can pass through during construction, ensuring the convenience of construction.
Temporary 3D Scan
Patents Registrated: 10-1628223, 10-161172, 10-1621456, 10-1801054, 10-1629286, 10-1638478
Open Caisson (Breakwater Shore)
Well, Open Caisson, which is installed as the basis of a structure that must be installed up to hard ground, is manufactured on-site from 'reinforced concrete' or 'thick plate steel' in a prototype, but the stiffness of extra corrugated steel plate (EXSCor) is increased (application of 10mm thick plate and double shell structure) makes it possible to construct quickly and economically with the foundation of a well for a bridge temporary well, a breakwater shore in a port, and a thermal power plant that uses a lot of seawater. 'High-strength seawater resistance for ports and offshore structures: Poseidon500' for corrosion resistance can be applied, and 3D FEA analysis makes it possible to review the environment under various conditions.