Encardio-rite
was entrusted with the monitoring work for almost all the packages of
Chennai metro i.e. UAA-1, UAA-2, UAA-3, UAA-4 and UAA-5. The scope of
work broadly consisted of:
- Pre and post construction condition survey for buildings within zone of influence.
- Supply, Installation of geotechnical and structural instruments used for safety monitoring.
- Manual and automatic monitoring.
- Programming and commissioning of automatic systems where required.
- Daily, weekly and monthly reporting with data evaluation & interpretation.
- Calibration of data loggers and sensors.
Instrumentation used included:
- Inclinometer system for diaphragm walls and subsurface monitoring around stations and tunnels.
- Inclinometer cum Magnetic extensometer for subsurface lateral movement as well as settlement monitoring.
- Piezometers (vibrating wire, casagrande and standpipe) for monitoring ground water level and pore pressures.
- Center hole load cell for anchors.
- Strain gages for strut monitoring and for pile testing and diaphragm walls.
- Borehole extensometer for subsurface settlement and ground settlement points for surface settlement monitoring.
- Crack meters, tilt meters, Bi-reflex targets, Mini prism targets and building settlement points for structure monitoring.
- Portable readout units.
Package UAA-01
Contractor: Afcons-Transtonnelstroy JV
Consultants: General Consultants
This
package included 1 corridor of the Chennai Metro Project – the distance
from Washermenpet to the Egmore station. With 5 underground stations,
the length of the twin tunnel using the TBM (Tunnel Boring Machine)
technique is 5.5 km.
Encardio-rite was awarded the sub-contract
for instrumentation, monitoring and survey work of the alignment of the
tunnel and of the underground stations at Washermenpet, Mannadi, High
Court, Chennai Central and Egmore and May Day Park.
Package UAA-02
Contractor: Gammon – Mosetrostroy JV (GILMMS JV)
Consultants: General Consultants
The
Package UAA-2 consisted of twin tunnels with diameter of 6.6 m each.
Encardio-rite was the subcontractor for the monitoring and
instrumentation work for the underground stations at the Government
estate, LIC, Thousand Lights estate and associated tunnels.
Package UAA-03
Contractor: GAMMON – MOSMETROSTROYJV (GILMMS JV)
Consultants: General Consultants
Encardio-rite
was awarded the contract for the complete monitoring and
instrumentation of package UAA-03 on corridor 1 including four
underground stations at Saidapet, Chamier’s, Teynampet, Gemini and
associated twin tunnels of about 3.4 km.
Package UAA-04
Contractor: L&T-SUCG joint venture
Consultants: General Consultants
Encardio-rite
was responsible for the monitoring and instrumentation work of the
underground stations and associated tunnels at Nehru Park, Kilpauk
Medical College and Pachaiappa College.
Package UAA-05
Contractor: AfconsTranstonnelstroy JV
Consultants: General Consultants
This
package included 2 corridors of the Chennai Metro Project, covering the
distance from Shenoy Nagar to Thirumangalam station. With 4 underground
stations, the length of twin tunnel with the TBM (Tunnel Boring
Machine) technique is 3.1 km.
Encardio-rite was awarded the
sub-contract for the instrumentation of underground stations and tunnels
at Shenoy Nagar, Anna Nagar East, Anna Nagar Tower and Thirumangalam.
