DAEDOTech
We're Different
History of CSS
In 1896, it began with the patents of American civil engineers James H. Watson and Stanley Simpson. In North America, it was applied to small culvert till the 1930s. Up to the late 1900s, the maximum span was applied to 11m, expanded it to facilities (ammunition). Span has been extended to 23m from the 2000s and expanded to overpass road tunnels, mine stockpile, reclaim Tunnel, and military facilities (hangars). From 2014 to 2016, we have expanded the maximum span to 40m by successfully researching and commercializing the EXSCor (ASTM A796M Table 37, MP500) of DAEDOTech. It is more economical, stable and workable than concrete structures in a multi-stage process by fully satisfying the maximum loads of CAT 797F (about 620 tons) and EURO LM7. The mining haul trucks that have not been applied to live to load with a wide span, we have enough competitiveness. Also, EXSCor (ASTM A796M Table 37, MP500) corrugation profile has been registered in Korea as well as AASHTO LRFD and ASTM A796M in the USA according to design standards and products.
General Infomation
The Corrugated Steel Structure (CSS) produced a constant intensity corrugation profile at the factory. The moment of inertia (Pitch: 150 mm, Depth 50 mm) was 92 times higher than the steel before pressing forming (Pitch: 381 mm, Depth 140 mm ) Is 842 times, and EXSCor (Pitch: 500mm, Depth 237mm) is increased by 2,466 times. The corrugated steel sheet is machined to have the same curvature as the drawings and can be assembled into a bolt hole. For durability, Applies hot dipping zinc galvanizing (900g / m2, 1100g / m2) and POSMAC material. On-site assembly is completed by connecting with high tension bolts. It is a structure that is completed by waterproofing the overlapping part of the periphery of the bolt and completing the backfill materials and compaction required for the structural calculation and specifications.
Solution Improvement
The most important factors to ensure stability in the design of corrugated steel plates are bolt seam strength, bending tests, and box-shaped hunch tests. (KDS 14 31 10: 2017: Ministry of Land Transportation, Korea) by applying verification values through various experiments ( fy: 275MPa, fy: 315MPa, fy: 450MPa) ASTM A796M, AASHTO M167, and Korea Design Criteria meet the requirements of KCS 11 40 10: 2016 (Ministry of Land Transportation, Korea), Defense and Military Facilities Standards (DMFC 4-10-70: 2009: Ministry of National Defense, Korea) , Also, we are satisfied with AS/NZS 2041.1: 2011.
Bolt Seam Strength
Bending Moment
Hunch_Bending Moment
In addition, the production and commercialization of EXSCor (Pitch: 500mm, Depth 237mm), which is produced only by two companies in the world, We have increased material usage by 9%, securing the stiffness of the moment of inertia about 3 times the moment of inertia, and have the production capacity and engineering ability of the corrugated steel structure which is more stable.
Hunch_Bending Moment Lab. Motion Picture
3 Times Increased
Typical Section Library Service
We optimize the "rise ratio" to the span with the increase of the stiffness of the EXSCor, and actively provide the section that the customer wants to change frequently in the civil engineering field. The based of each span from 2m up to 40m each cross-section, it has 8 ~ 9 optimal sectional ratios (Arch shape rise ratio: 30% ~ 85% / Box shape rise ratio: 20% ~ 65%). The typical library has 440 standard sections (Typical Section Library) so that customers can provide them as CAD files. Also, we provide the CSS bill of material quantity and optimized soil cover for each section, along with the OCT results during initial planning and design. *Please ask DAEDOTech’s engineers to request a Typical Section Library when establishing a section plan.
Solution Engineering Service
We provide one-stop service through the OCT (Optimization Comparison Table) Program. The OCT Program is a smartphone (Android Version) and Web-based program. All engineers of our company select 395,872 Library Database in real time to select the optimum section in real time. It reflects the on-site conditions through the choice of backfill material and backfills compaction ratio ( Group Classification of Backfill materials by AASHTO, Compaction Ratio 95%, 90%, 85%). The thickness of the corrugated steel structure (price comparison is possible by calculating the weight per M). The stability of the structure (safety factor according to each country's standards) can be immediately provided. Also, by providing the bearing capacity values for the concrete foundation, it provides optimized engineering that ensures the stability of the corrugated steel structure to the overall construction cost. Not just the construction cost comparison of the corrugated steel sheet when establishing the structure plan. After planning the optimal structure through OCT program, we provide all engineering services related to corrugated steel structure through an internal program which automatically structural calculated quantity of materials, design drawing, and calculation sheet (optional FEA report)
Optimizing Comparison Report
*Section, Stability, Weight
Based on Web Version
FEA: In case of a structure with asymmetric condition or soil is excessively high, the specificity of the field condition exists and the moment of the corrugated steel structure at the backfill stage through the 3D and 2D modeling computer-aided analysis (FEA: Midas GTX, Midas Civil, CANDE). Engineering services that predict axial force, moment and displacement and reflect it in a structural calculation.
3D Scan: Also, we are the first in the industry to introduce the latest 3D scanning systems (Lieca® 3P, Cyclone®, TrueView®) technology to provide structural monitoring services. We provide the work to survey the displacement during after completed in the backfill and the displacement survey within ± 3mm.
BIM (Building Information Method): By applying BIM from the initial design planning stage for the first time in the world, the customer wanted to fully understand the field plan in three dimensions, and minimized errors by accurately calculating the materials and costs used in detailed design. As the stage of BIM detailed design is designed with LoD (Level of Development) of 350 or more, the property value of all applied materials is provided. Through this, it is a design method considering the maintenance part in the future. In addition, by providing detailed data for each construction stage, we ensured that there are no errors in the field, and we share it with customers via smartphones and PC through the On-Line Viewer.
