Tunnelling under Densely Built-up Area in Hong Kong

The Quarry Bay Congestion Relief Works Contract 680 consists of the modification of the North Point Station and tunnels of MTR, which are located under the most densely built-up area in Hong Kong.
Two TBMs are being used for boring the running tunnels, and NATM is being adopted to excavate the associated tunnels.

TBM for 680
Tunnel Boring machine for the Running Tunnel
TBM for 680
completed Running Tunnel

Quarry Bay Congestion Relief Works. Contract 680 North Point Station.
Modification and Tunnels.

Location HongKong, China
Client Mass Transit Railway Corp.
Outline of the Project TBM : Two running tunnels
Length : 3,197m
I.D. : 5,634mm
Modification of Existing North
Point Station

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