HULHULE-MALE’ BRIDGE PROJECT

EIA for the proposed Hulhule-Male’ Bridge Project
monument. The approach bridge is about 540 m long. The route then ends at the south side of
Hulhule and connects with the planned road connecting the airport and Hulhumale.
2.3.1.4 Profile design
The profile of this project, based mainly on height constrains of existing breakwaters, navigable
clearance and navigation height restriction, is designed after considering the graceful appearance
of bridge and other factors. At Male’ end the existing breakwater requires the starting point to be
elevated 20 cm from the surface of the breakwater. The middle part of the bridge requires
navigable clearance height for smaller vessels. At Hulhule side the elevation profile needs to be
very low to account for flight path restrictions. The maximum longitudinal gradient of the whole
route is 3.5%; the minimum slope length is 150 m; the minimum convex curve radius is 5,000 m
and the minimum concave curve radius is 4,500 m.
2.3.2 Bridge Design Details
2.3.2.1 Design scheme of main bridge
The main bridge is a prestressed concrete six-span continuous rigid frame structure, with a span
layout of 100+180×2+140+100+60 m. The whole bridge is 760 m long.
The superstructure of main bridge adopts single-box double-cell prestressed concrete box girder
and its overall width is 20.3 m. The gradient of symmetrical herringbone cross slope, which is
set on the flange plate of super face of box girder, is 2.5%. The mid-span beam of box girder is
3.0 m high; the beam depth of root shall be take 1/16 of the span, which are 11.25 m (180 m
span) and 6.25 m (140 m/100 m span) respectively. The beam depth varies by 1.8 parabolas
from root to mid-span.
Figure 2.6: Standard Cross-section of Concrete Box Girder of Main Bridge
Prepared by: CDE Consulting & China Shipping Environment Technology Page| 19