Bogibeel
bridge is a 4.94 km combined road and rail bridge over the Brahmaputra
rivel in the northeastern Indian state of Assam. It is situated between
the Dhemaji district and Dibrugarh district and is known as the longest
rail-cum-road bridge in India. It is also Asia’s 2nd longest
rail-cum-road bridge and the fifth-longest bridge in India. The bridge
has a double rail line on the lower deck and a 3 lane road on the upper
deck.
The Bogibeel bridge is situated in an earth-prone area which
is why the construction of the bridge consists of composite welded
steel-concrete beams/trusses that can withstand an earthquake of
magnitudes up to 7 on the Richter scale
Encardio-rite was
entrusted with the supply of sensors, dataloggers, geodetic targets and
weather station. It was also responsible for the installation of
instruments, and monitoring with dataloggers and real-time web-based
data management system.
Instrumentation was required for real-time
monitoring of the load test being conducted. Strain gauges,
thermocouples, displacement sensors were installed to test the strain
developed at full load, a variation of temperatures and displacement of
the bearings of the bridge span. Encardio-rite was entrusted with the
complete monitoring works.