e-mosty December 2018 e-mosty December 2018 | Page 22

Figures 46 and 47: Completed Wadi Leban Bridge showing parapet detail and deck finishes
BANDRA-WORLI SEALINK BRIDGE, INDIA (2009)
A precast segmental bridge consisting of 51x 50m
approach span and two cable-stayed bridge of 350m
(Worli) and 500m (Bandra) length, for a total bridge
length of 3.5km. Each typical 50m span consists of 15
120t segments which were lifted in place by a 1200t
erection gantry; it is one of the longest span bridges in
India.
The link lies just off the coast across a bay and
provides an 8-lane relief to chronic congestion in a
particularly busy part of India’s commercial capital.
In a city which grew out of 7 islands and hence only a
few routes, a car population of over 1.5m and rapidly
booming usage, the link provides significant
reductions in vehicle congestion and hence emissions,
with minimal impact on the environment.
The spans of the structures allow for the local
fishermen to easily access the deep water and hence
continue with their traditional lifestyle. The dramatic
form gives an iconic landmark to the city and has
already been used in national adverting campaigns as
a symbol of the advancement of modern India.
The structure comprises twin parallel bridges, sharing
only common the stay towers. The erection was
complicated by a working season of only six months
due to the monsoon.
The contractor was not experienced in erection of
such complicated bridges, so I spent approximately
50% of the working season on site, actively aiding the
contractor with erection methodology and but also
best practice in safety and management of the
project.
Figure 49: Bandra Worli-Sealink under construction.
The sweep of the viaducts leading to the main span
with the centre of the city in the distance
Figure 48: Bandra – Worli Main span tower
4/2018