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.
ChungAmEnC
SolutionMilitary protection facilities
For corrugated steel plate military facilities , economical efficiency and constructability are important, but protection is even more important. If we compare the protective facilities constructed with corrugated steel sheet and concrete, concrete proceeds from cracking to fracture according to the strength of impact energy applied to the structure due to explosion, whereas corrugated steel sheet, a steel material, changes to deformation energy under the same conditions. . In other words, concrete exhibits considerable resistance to static compressive forces, but not to dynamic impacts applied instantaneously (Nano Second) such as explosions. In addition, although concrete has a high possibility of damage from debris caused by internal debris, secondary damage to the corrugated steel plate protective structure is very low or absent .
For corrugated steel plate military facilities , economical efficiency and constructability are important, but protection is even more important. If we compare the protective facilities constructed with corrugated steel sheet and concrete, concrete proceeds from cracking to fracture according to the strength of impact energy applied to the structure due to explosion, whereas corrugated steel sheet, a steel material, changes to deformation energy under the same conditions. . In other words, concrete exhibits considerable resistance to static compressive forces, but not to dynamic impacts applied instantaneously (Nano Second) such as explosions. In addition, although concrete has a high possibility of damage from debris caused by internal debris, secondary damage to the corrugated steel plate protective structure is very low or absent .
For corrugated steel plate military facilities , economical efficiency and constructability are important, but protection is even more important. If we compare the protective facilities constructed with corrugated steel sheet and concrete, concrete proceeds from cracking to fracture according to the strength of impact energy applied to the structure due to explosion, whereas corrugated steel sheet, a steel material, changes to deformation energy under the same conditions. . In other words, concrete exhibits considerable resistance to static compressive forces, but not to dynamic impacts applied instantaneously (Nano Second) such as explosions. In addition, although concrete has a high possibility of damage from debris caused by internal debris, secondary damage to the corrugated steel plate protective structure is very low or absent .
For corrugated steel plate military facilities , economical efficiency and constructability are important, but protection is even more important. If we compare the protective facilities constructed with corrugated steel sheet and concrete, concrete proceeds from cracking to fracture according to the strength of impact energy applied to the structure due to explosion, whereas corrugated steel sheet, a steel material, changes to deformation energy under the same conditions. . In other words, concrete exhibits considerable resistance to static compressive forces, but not to dynamic impacts applied instantaneously (Nano Second) such as explosions. In addition, although concrete has a high possibility of damage from debris caused by internal debris, secondary damage to the corrugated steel plate protective structure is very low or absent .
For corrugated steel plate military facilities , economical efficiency and constructability are important, but protection is even more important. If we compare the protective facilities constructed with corrugated steel sheet and concrete, concrete proceeds from cracking to fracture according to the strength of impact energy applied to the structure due to explosion, whereas corrugated steel sheet, a steel material, changes to deformation energy under the same conditions. . In other words, concrete exhibits considerable resistance to static compressive forces, but not to dynamic impacts applied instantaneously (Nano Second) such as explosions. In addition, although concrete has a high possibility of damage from debris caused by internal debris, secondary damage to the corrugated steel plate protective structure is very low or absent .
For corrugated steel plate military facilities , economical efficiency and constructability are important, but protection is even more important. If we compare the protective facilities constructed with corrugated steel sheet and concrete, concrete proceeds from cracking to fracture according to the strength of impact energy applied to the structure due to explosion, whereas corrugated steel sheet, a steel material, changes to deformation energy under the same conditions. . In other words, concrete exhibits considerable resistance to static compressive forces, but not to dynamic impacts applied instantaneously (Nano Second) such as explosions. In addition, although concrete has a high possibility of damage from debris caused by internal debris, secondary damage to the corrugated steel plate protective structure is very low or absent .
For corrugated steel plate military facilities , economical efficiency and constructability are important, but protection is even more important. If we compare the protective facilities constructed with corrugated steel sheet and concrete, concrete proceeds from cracking to fracture according to the strength of impact energy applied to the structure due to explosion, whereas corrugated steel sheet, a steel material, changes to deformation energy under the same conditions. . In other words, concrete exhibits considerable resistance to static compressive forces, but not to dynamic impacts applied instantaneously (Nano Second) such as explosions. In addition, although concrete has a high possibility of damage from debris caused by internal debris, secondary damage to the corrugated steel plate protective structure is very low or absent .
For corrugated steel plate military facilities , economical efficiency and constructability are important, but protection is even more important. If we compare the protective facilities constructed with corrugated steel sheet and concrete, concrete proceeds from cracking to fracture according to the strength of impact energy applied to the structure due to explosion, whereas corrugated steel sheet, a steel material, changes to deformation energy under the same conditions. . In other words, concrete exhibits considerable resistance to static compressive forces, but not to dynamic impacts applied instantaneously (Nano Second) such as explosions. In addition, although concrete has a high possibility of damage from debris caused by internal debris, secondary damage to the corrugated steel plate protective structure is very low or absent .
For corrugated steel plate military facilities , economical efficiency and constructability are important, but protection is even more important. If we compare the protective facilities constructed with corrugated steel sheet and concrete, concrete proceeds from cracking to fracture according to the strength of impact energy applied to the structure due to explosion, whereas corrugated steel sheet, a steel material, changes to deformation energy under the same conditions. . In other words, concrete exhibits considerable resistance to static compressive forces, but not to dynamic impacts applied instantaneously (Nano Second) such as explosions. In addition, although concrete has a high possibility of damage from debris caused by internal debris, secondary damage to the corrugated steel plate protective structure is very low or absent .
For corrugated steel plate military facilities , economical efficiency and constructability are important, but protection is even more important. If we compare the protective facilities constructed with corrugated steel sheet and concrete, concrete proceeds from cracking to fracture according to the strength of impact energy applied to the structure due to explosion, whereas corrugated steel sheet, a steel material, changes to deformation energy under the same conditions. . In other words, concrete exhibits considerable resistance to static compressive forces, but not to dynamic impacts applied instantaneously (Nano Second) such as explosions. In addition, although concrete has a high possibility of damage from debris caused by internal debris, secondary damage to the corrugated steel plate protective structure is very low or absent .
For corrugated steel plate military facilities , economical efficiency and constructability are important, but protection is even more important. If we compare the protective facilities constructed with corrugated steel sheet and concrete, concrete proceeds from cracking to fracture according to the strength of impact energy applied to the structure due to explosion, whereas corrugated steel sheet, a steel material, changes to deformation energy under the same conditions. . In other words, concrete exhibits considerable resistance to static compressive forces, but not to dynamic impacts applied instantaneously (Nano Second) such as explosions. In addition, although concrete has a high possibility of damage from debris caused by internal debris, secondary damage to the corrugated steel plate protective structure is very low or absent .
Q.4 Waterproofing problems in steel joints are expected to be serious. What is the solution?
A.4Corrugated steel sheets are made by connecting single sheets of steel with bolts in the longitudinal direction. Each sheet of corrugated steel sheet controls the flow of water on the outside. Considering that the upper steel plate is assembled on top of the lower steel plate‘Tile overlapping method’An impermeable material (Neoprene) gasket is inserted into the overlapping area to form a tight structure. The joint of the ‘bolt’ is fastened using bolts and nuts in the bolt hole, and then a bolt rubber gap (cap) is placed on each bolt on the outside. There is a method of putting urethane sealant inside the bolt rubber cap. (‘00~’22/present)
The method developed in 2021 uses a filler made of a special material when fastening bolts. A method of fundamentally blocking the gap between bolts and bolt holesIt has been developed and has excellent economic feasibility and constructability, so it is used in Korea and Japan.
A.4 Waterproofing/sintering:Since it is manufactured in a factory, the quality is uniform, but in the past, when corrugated steel plates were first introduced to the military, civilian methods were applied, so there was a lack of construction manuals and quality control for detailed parts. but,Developers' waterproofing technology has increased and solutions for user performance requirements have been secured based on know-how applied to overseas construction sites.
Q.5 In any case, the protection of Eom Cheho must be considered in conjunction with the explosion-proof door. What is an alternative to this?
A.5 The subject of review of standards and guidelines related to explosion-proof doors must be installed in accordance with the major military facility protection standards (DMFC 2-20-00) and explosion-proof and bulletproof facility design standards (DMFC 2-20-10).
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Procedures related to explosion-proof doors must establish standards for establishing the level of protection and explosion conditions.
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The cross-sectional review of the explosion-proof door body and the review of explosion-proof and fragmentation protection refer to explosion-proof and bullet-proof design standards.
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Depending on the level of protection, the functional requirements required for explosion-proof doors may vary. The basic details are determined by the definition of the protection level, but the unit using it can designate it by considering the protection target elements and allowable levels of the explosion-proof door.
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Performance tests and This is done through performance certification.
A.5 Blast door connection/sintering: When designing Eom Che-ho, we followed the 'Explosion-proof door design and quality control procedures' and 'Current related standards and guidelines' and raised requirements regarding the types and functional requirements of explosion-proof doors in terms of usability by the units using them. As the interface must be determined and designed, it is reasonable to proceed in conjunction with the explosion-proof door.
※Functional requirements for the unit used (example): Mechanical, human-type explosion-proof door opening and closing device, and operation device for immediate opening (required time) in emergency conditions are required.
Q.6 What are the special advantages of other steel materials? (relatively short construction period, eco-friendly, easy maintenance, etc.)
A.6
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Flexibility in meeting protection performance against direct hits:As the explosives of enemy weapons increase in the most frequent threat (MCE) area, a protective capability in response to a direct attack on the facility (upper indicator) is an essential condition rather than a protective capability due to a close explosion. For this purpose,Securing protection sufficiency against direct hits by undergrounding or covering (piling up soil) on top.I will do it. However, in the case of reinforced concrete (RC), there are limitations to covering it as a rigid structure. On the other hand,Corrugated steel plate is a structure that behaves as one with the soil, thereby securing additional fill.It's possible. (Example: 63 pyeong steel ammunition depot: Up to 6m additional cover is possible under current design conditions)
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Eco-friendly factors: It is a national policy and a material for reducing carbon emissions, which is a global trend. Although it varies depending on the applied facility, when comparing a 63-pyeong ammunition depot, the amount of reinforced concrete and corrugated steel required are almost similar. However, the amount of concrete used was 47m3 compared to 308m3.As steel ammunition storage accounts for only 15%, carbon emissions are significantly reduced.It's possible. In the case of a steel protective wall, only soil is filled inside the steel bin, and it can be recycled when re-placed, making it a very eco-friendly product compared to concrete facilities.
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Economic feasibility / Ease of security management during construction:Since the corrugated steel sheet materials applied to the facility are 100% manufactured in the factory, quality control is easy and the use of workers and equipment on site is minimized compared to concrete structures. This is when constructing a facility.Ease of security management and minimize budget surcharges for labor and equipment costs, which increase every yearBy doing this, it is possible to reduce the national budget.
