The
Deira Waterfront Development is one of the most important development
projects and involves construction of a number of new plazas, mixed-use
buildings and green open spaces.
Phase 1 of the project included
development of almost 30 plots along the waterfront, each with its own
development plan and design. Plot-13 is one such plot, located in the
northern portion of Dubai in the Deira District, that includes a maximum
two level basement (approximately 10 m deep excavation).
As the
project involved heavy construction activities adjacent to the tunnels
of the Dubai Metro Green Line and the Shindagha Road, the tunnels were
monitored.
Encardio-rite was awarded the contract for the
monitoring work that included the supply of instruments, installation,
manual and automatic monitoring and surveying with daily and weekly
reporting. Pre-construction condition monitoring of both the tunnels was
also executed by Encardio-rite.
Instruments used comprised of a
strain gage, a borehole extensometer, a magnetic extensometer, beam
sensor/tilt meters, a tri-axial vibration sensor, a prism target and
crack meters for monitoring existing metro and road tunnels and rail
tracks. An in-place inclinometer, inclinometer, load cells, a piezometer
and surface settlement points were used for monitoring the excavation
work.
Online monitoring was done for geotechnical sensors that were critical using advanced automatic data loggers and data acquisition systems. Automatic total stations
with complex control boxes were used for online monitoring of geodetic
points. Monitored data (automatic as well as manual) was available
online through a web based data management system to the Contractor, Client and the Consultant.