ABSTRACT:The Honam High-Speed Railway Lot No.4-2 consisting of 6 bridges including the arch bridge, the extradosed bridge and 2 tunnels with a total length of 9.38km and the whole construction work should be completed within 31 months only. In order to control the detailed cost and the construction process thoroughly, the construction management integrated system based on BIM(Building Information Modeling) has been developed and adopted firstly by the Civil Engineering Technology Dept. of Ssangyong E&C in Korea. In this paper, the application of the construction management integrated system using BIM on the Honam High-Speed Railway Lot No. 4-2 has been introduced. This system is mainly made up of the full-range 3D information models and the web-based 5D system models. The web-based 5D system is composed of the safety and equipment management modules using virtual reality as well as the 4D earthwork quantity control system. Through the construction management integrated system based on BIM, an integrated on-site management can be achieved, especially in the best cost adjustment, construction management and safety conditions.
In this study, structural safety capacity analysis of the overpass railway bridge between Konkuk Univ. and Guui station railroad has been performed. The overpass is expected to have suffered durability reduction by deterioration. The weight reduction of the overpass has been implemented to prevent further durability reduction and to improve performance capacity. To reduce the weight, 3 procedures of replacing concrete soundproofing wall to light-weight soundproofing wall, replacing gravel ballast to concrete ballast, and reducing the weight of trough have been performed. The analysis of static/dynamic behaviors and improved capacity of the light-weighted overpass bridge has been performed. The structural safety verification of the improved structure has been implemented by using rating factors of load carrying capacity of PSC I girder. The results have shown that the deflection has been reduced by 2.6mm and tensile strength has been improved by 1.07MPa, which indicate that the structural capacity has effectively been improved. Also, the natural frequency has improved by approximately 30% where vibration reduction and dynamic behavior improvement have been achieved. Moreover, in the rating factor evaluation based on analysis and test results, an improvement from 1.82 to 1.93 has been observed. Therefore, weight reduction method for the overpass is effective considering overall results.
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