places.
The width/height ratio of the girder cross section is 2.22 with a maximum width of 4.0 m and heght of 1.8 m
UBTSL's calculation of construction costs and our cost review are based on the assumption that the entire route is composed of girders for two parallel single-track lines. However, double-track girders will be used under some conditions.
For construction work, India uses the incremental launching girder system (the ILGS method) which is called the block construction method in Japan. In the IL,GS method, PC bridges are manufactured in thickness of 3-m to 4-m segments; the segments are transported to the site; and the girder is erected by the post-tension method. As compared to shop fabrication of complete bridges, this method faciliates mass production of bridge components at factories and ensures higher quality at lower costs using smaller production facilities. However final erection by the post-tension method involves extremely advanced technologies. Therefore, India relies on technology imported from Germany,(currently a German patent).
During the course of the site survey conduced to evaluate the construction of this LRT, we had an opportunity to see the Sirsi Circle Town Hall Flyover Construction Work (for a total length of 2.5 km) being performed with the ILGS method in Mysore Street in Bangalore. We confirmed that construction workers and technologies are available in India with the exception of large-scale construction machinery and the aforementioned patented technology.
In accordance with geological conditions at the site, special structures (crossovers) that deviate from the standard design are assumed at eight places.
(4) Stations
There are three types of station structures (underslung, overslung and at-grade), depending on the levels of concourse and platforms. In an at-grade station, the concourse is at ground level. In Phase 1 of this project all stations will be underslung.
Platforms will be centered between the inbound and outbound track, an arrangement called the island platform in Japan. Platforms are 6.1 m wide and 125 m long to accommodate four-car trains in the future. The central portion of the platform will be covered with a 12 m-wide and 25 m-long roof.
The area of the mezzanine concourse is about 700 m2 to accommodate various station facilities.(Appendix 6.2-1, 2, 3)
(5) Railway construction technologies in and around Bangalore
As part of the survey to evaluate the cost of construction work for this LRT, we studied an outline of the Konkan Railway construction project in Mumbai and the Sirsi Circle Town Hall Flyover Construction Work (SCTH Flyover CW)(for a total length of 2.5 km) which was being constructed using the ILGS method in Mysore street in Bangalore. The ILGS method will also be adopted for the present project.
Based on the Endings of this study, we compared the features of railway construction technologies in southern India and in Japan.
(a) India uses domestic and foreign codes and standards as design and management criteria.
