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Image gallery: Photos show Martin Place progress on Sydney Metro

Sydney Metro has released new images showing progress on the excavation of the cavern for the new Martin Place station.

Two road headers are working 24 hours a day, seven days a week to tunnel out the 220m long, 16m high and 14m wide cavern which is 25m below Castlereagh and Elizabeth streets.

Martin Place will be one of four new stations within Sydney’s central business district but the road headers need to excavate out more than 166,000t of rock before the new station can take shape.

Sydney Metro has said that 2,950 rock bolts, 37,000 litres of grout and 1,200m3 of sprayed concrete will be used to complete the station box.

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