- Pathanamthitta, Kerala
- info@mtechc.com
To be good management for inspiring people to construct India more Powerful, We will strengthen the nation with safety and quality standards for our team and public.
We, METROTECH CONSTRUCTIONS are having well Experience in Tunnel Drilling, Blasting, Erection, Reinforcement, Lining Concrete, Grouting, Metro Rail Cross Passage, (Including Excavation, Wire mesh fixing, Shotcrete, Rib erection, Reinforcement, Gantry erection and Lining concreting), Metro Rail Tunnel Portals, Track bed Concrete and Installation of Permanent Walkway etc.
The location of the Probe Holes will be decided by the Tunnel-Engineer/or Geotechnical Expert. In general, these test holes will be drilled in The
Chemical grouting will be used in grouting which comprises of Sodium Silicate and Cement. The grouting criteria are based on the in-site soil conditions and are
Marking of grouting pattern points as per the sketch shown below
Prior removing the centre piece of the entry segment and starting the excavation work, a Segment support will be installed.
After Completion of Cross Passage Fore poling Support i.e., structural steel ring supporting frame.
After installation of top and bottom lintels or Temporary ring, we can start to remove the centre segment part to allow entry for the cross passage works.
The excavation of the cross passages will be carried out wherever it is possible with small excavators, rock breakers like Tata Hitachi TMX-20 & Hilti 1000AVR.
From the face, the muck shall be loaded by TMX-20 and transported into a muck dumper (407 Tipper) stationed inside the tunnel.
Immediately after excavation, Primary lining with sprayed concrete will be applied. The Primary lining and other details shall be followed as per approved drawing.
After completion of first layer of shotcrete, wire mesh shall be installed. To support this wire mesh, nails shall be placed on first layer of shotcrete.
Shotcrete shall be used as per approved drawing. The shotcrete mix ratio shall be followed as per approved mix design.
Tunnel Drilling, Blasting, Erection, Reinforcement, Lining Concrete, Grouting, Metro Rail Cross Passage, (Including Excavation, Wire mesh fixing, Shotcrete, Rib erection, Reinforcement, Gantry erection and Lining concreting), Metro Rail Tunnel Portals, Track bed Concrete and Installation of Permanent Walkway
"Metrotech Constructions handled the construction of our cross passages connecting the twin tunnels with real skill. The geometry was challenging and the schedule demanding, yet they delivered efficiently and within a timeframe while meeting every contractual obligation. We'd be glad to work with them again."
ITD – ITD CEM Joint Venture — Kolkata East-West Metro, UG-2 (Ventilation Shaft & NATM Tunnel)
"Working in very challenging geological conditions, Metrotech completed the ventilation shaft and NATM tunnel well ahead of schedule. Their commitment to quality and safety throughout was excellent. A reliable and capable subcontractor."
ITD – ITD CEM Joint Venture — Kolkata East-West Metro, UG-2 (Esplanade–Sealdah Cross Passages)
"Metrotech executed five cross passages between Esplanade and Sealdah under difficult ground conditions and finished well before the scheduled completion date, maintaining high standards of quality and safety. Their work was quite satisfactory."
Transtonnelstroy-Afcons JV — Kolkata East-West Metro, UG-1
"For India's deepest metro shaft, Metrotech constructed the cross passages connecting the ventilation shaft and tunnels in very challenging conditions. They completed the work ahead of schedule with strong quality and safety standards. We look forward to working with them again."
Gülermak – TPL Pune Metro Joint Venture
Metrotech carried out shortcrete application and rock bolt installation for slope protection on our Pune Metro UGC-01 works. The job was completed reliably and to our satisfaction
Alok Chandra Tiwari, Project Director, Delhi-Ghaziabad-Meerut RRTS CorridorAfcons Infrastructure Ltd. — RRTS Project, Pkg-8 (Meerut)