Padma Multipurpose Bridge Project

Table of ContentsList of Tables 6-iList of Figures 6-i6 Analysis of Alternatives 6-16.1 Framework for Assessment of Alternatives 6-16.1.1 Assessment Framework 6-16.2 Weighted Scores of Alternatives 6-26.3 Without the Project Alternative 6-36.4 Alternative Analysis during Feasibility Study 6-36.4.1 Location/Alignment of Bridge 6-36.4.1.1 Mawa-Janjira Site 6-86.4.1.2 Paturia-Goalundo Site 6-96.4.2 Type of Bridge 6-106.5 Alternative Analysis during Detailed Design 6-106.5.1 Design of Main Bridge 6-106.5.2 Design of Transition Structures 6-186.5.3 Modifications of Feasibility Design: Bridge End Facilities & NavigationClearance 6-186.6 River Training Works 6-196.6.1 Alternative 1 - Revetment on Bank of Southside Channel 6-196.6.2 Alternative 2 - : Guide Bund and Upstream Hard Points on South Bank 6-206.6.3 Alternative 2 Modified – Hard points in Char: 6-216.7 Preferred Options 6-296.8 Conclusion 6-30List of TablesTable 6-1: Comparison Summary for Alternative Crossing Locations of Padma Bridge 6-5Table 6-2: Evaluation Criteria for two shortlisted alignments 6-8Table 6-3: Comparison of concrete extradosed and steel truss bridges 6-12Table 6-4: Comparison of Transition Structures 6-18Table 6-5: Alternate analysis of RTW 6-23Table 6-6: Weighted Score of Main Bridge Options 6-29Table 6-7: Weighted Score of Transition Structure Options 6-29Table 6-8: Weighted Score of RTW Options 6-29List of FiguresFigure 6-1: Framework for Alternate Analysis 6-1Figure 6-2: Alternate locations studied for the bridge site during FS 6-4Figure 6-3: Alternative 1: Revetment on bank of south channel 6-20Figure 6-4: Alternative 2: Guide bund and hard points on bank of south channel 6-21Figure 6-5: Alternative 2 Modified: Guidebund and hardpoints on char 6-21Figure 6-6: Preferred option 6-306-i