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Technical write up ROB Launching-Balance Cantilever Method


Author(s):

K. Shanmuga Sundaram , Parsons Ltd

Keywords:

Metro Rail Bridge, Balance Cantilever Erection Method, Box Shape Precast Segment, Self- Launching Erection Gantry, Post-Tensioning

Abstract:

This article presents the pre-cast segmented Balanced Cantilever Method of launching of segments by using LG and OH Gantry at ROB’s for Hyderabad metro rail rapid transit system in red, green and blue lines viaducts on particular locations where constraints obliged to have longer span lengths. Balanced cantilever erection precast segments have been used, combining the advantage of precast segment bridge (speed of construction) with balanced cantilever method advantages (longer spans).Total project length is an elevated viaduct spanning around 72 km of metro line and with 66 stations. Chosen bridge construction technique had to meet several requirements due to numerous constraints, among which speed of construction, geometry adjustability, environment disturbance. These project constraints led to use precast segmented by span ‘Balance Cantilever erection’ method. This construction method is the optimal one in terms of construction speed, quantity optimization, and construction quality and risk management.


Other Details:

Manuscript Id :IJSTEV5I6008
Published in :Volume : 5, Issue : 6
Publication Date: 01/01/2019
Page(s): 7-22
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