Padma Multipurpose Bridge Project Area and Location

 

The Project area is situated in Bangladesh's south-central districts of Munshiganj, Shariatpur, and Madaripur. Lauhajang and Srinagar Upazila in Munshiganj District are located in the specific area on the Padma Multipurpose Bridge's north side (Mawa), while Janjira Upazila in Shariatpur District and Shibchar Upazila in Madaripur District is located on the bridge's south side (Janjira). The Project's influence will primarily be felt in:

• The trans-Asian railway network's corridor, the Asian Highway's corridor (Tamabil-Sylhet-Sorail-Kanchpur-Dhaka-Mawa-Bhatiapara-Norail-Jessore-Benapole), and the railway's missing link from Gendaria-Mawa to Bhanga-Kashiani-Narail-Jessore-Benapole
• Upstream and downstream of the Padma River is the Charland.

The network for utility connections also includes:

1. In order to complete the proposed National Gas Grid, a high-pressure gas transmission line will connect the Bakhrabad Gas Field to Siddirganj in order to increase gas supply, and an off-take valve at Langalbandh of Sonargaon Upazila under Narayanganj District will serve as the source point for gas supply to Mawa, which will cross the Bridge (on the lower deck).
2. A high-voltage power transmission line that runs parallel to and away from the bridge will bring power from Siddirganj in the Narayanganj district to Mawa, then across the river to Khulna, and (c) an optical fibre telecommunications cable on the bridge's lower deck.

Padma Multipurpose Bridge components

• The 6.15-kilometre-long Padma Multipurpose Bridge (Main Bridge) and its supporting structures (Bridge End Viaducts).
• Bridge Connecting Approach Roads and Related Structures (about 2.3 km on the Mawa side and 12.8 km on the Janjira side).
• Total Spans: 41 Nos.
• 40 Center piers and two transition piers at the landward ends.
• 7 underpasses, 6 bridges, 14 culverts, and 11 junctions;
• Toll Plazas 2, one in Mawa and one in Janjira;
• Construction Yards 2 (areas at Mawa and Janjira, each measuring 81 ha);
• Areas 2 of Service (at Mawa, 27.2 ha, and at Janjira, 63.7 ha);
• 4 Resettlement Sites (RS02: Jashaldia at Mawa, RS03: Kumarbhog at 15.46ha, RS04:
•  Paschim Naodoba at Janjira, RS05: Bakhorerkandi at Janjira, respectively); Future
•  Provision of Railway on the Lower Deck of the Bridge; and 
• Provision of Utility Crossings (high-pressure gas main and optical fibre telecommunication cable).

Finished Design

 

Bridge with Multiple Uses: Padma

The Padma Multipurpose Bridge Project will establish the detailed engineering design and all offering documentation for the entirety of the works based on the chosen final scheme design using cutting-edge techniques, methods, and principles to deliver an efficient, strong, and constructible plan that completely complies with the concurred plan models in accordance with international codes and standards and, where significant, distributed plan and detailed guides. The precise design plan will reveal any assumptions that have been made regarding the development succession and strategies, as well as, where pertinent, assumptions regarding crawl, shrinkage, and other time-related effects.

Pre-cambers that are necessary will be expressed in the design and specifications, or alternatively, requirements for the project worker to decide whether to use pre-cambers or projecting bends will be indicated. Illustrative designs, plan determinations, and construction details will be prepared as part of the point-by-point designing plan, on the basis of which the task quote and the O&M quote will be updated.

Main Bridge

The main bridge over the Padma is built primarily to allow for the level crossing of rail and road traffic and to fully utilize an integrated, fast, continuous communication network. The following are some of its primary attributes:

1. The bridge will have horizontal and vertical curves with a vertical gradient of 4 per cent for the pavement and 0.5 per cent for the future railway. The bridge will be about 6.15 km long and 22.5 m wide.
2. Overlooking the Padma River are two level composite steel trusses with regular spans that are each 150 meters long. A steel truss's upper chord and a top slab of concrete are joined together to form the deck's cross-section.
3. The two-level superstructure has a lower level with a single broad gauge railroad track and an upper level with dual two-lane carriageways with hard shoulders. The bridge's superstructure will be supported by 150m-spaced concrete piers with deep pile foundations.

Work River Training

In order to maintain the integration and functionality of the bridge, approach roads, BEF, and railways during the project's operation and maintenance phase, River Training Works (RTW) on both sides of the river at the location of the bridge are built in order to protect the river bank from erosion. River Training Works has a length of 14 km (8.7 mi).

Approach Roads

The following design details for the approach roads are considered:

• the approach roads are 2.3 km long on the Mawa side and 12.8 km long and 23.6 m wide on the Janjira side, making a total distance of 15.1 km;
• a 2.032 km (for the Mawa side) and a 1.915 km (for the Janjira side) approach road viaduct.
• The two-lane road will be widened into a four-lane approach road on the Mawa side;
• a new approach road with 6 bridges, 14 culverts, 7 underpasses, service roads, and 11 road intersections will be constructed on the Janjira side;