TBM cutterhead

2nd TBM cutterhead lowering at Launching Shaft New Delhi Station for tunnel-496.
Later it will be mounted to cutterhead support this giant which will crush anything from soil to rock weight about 65 tonnes and excavation diameter will be 6.55-meter, manufactured by Herrenknecht.
The finished diameter of the tunnel after precast segment lining will be 5.8m.

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Shotcrete

This days Shotcrete at Launching Chamber is in progress as hard rock was encounter during the excavation of it has been terminated 3m to 4m above formation level, so here comes wire mesh, shotcrete & rock bolting to secure the excavated face.
We don't have much scope of Shotcrete in, our project we will be doing dry Shotcrete.

The sequence of the work as follows.

• All material including water will be thoroughly mixed and will be placed on the shotcrete equipment.

• Compressed air will convey material at high velocity to the nozzle where the water and accelerators will be added.

•  Finally, the material will be consolidated on the excavated surface by high impact velocity.

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Beautiful Morning

Its a beautiful morning of-course its Delhi winter a cloudy morning, can feel the lovely breeze.
what a great start for the day with a beautiful view.

By the way that under construction building is Civic Center tallest building in Delhi with 5 multi-story blocks, the height of the building 101 meters in total 28 floors.   

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