June_1970 — Page 38

HONG KONG CROSS-HARBOUR TUNNEL

Artist's impression of tunnel entrance

ramp (which are formed structurally by contiguous piling) will be faced with precast concrete planks. The lower planks will have a striated finish and the upper planks a tiled finish.

Toll collection

Toll collection will be at thirteen booths across the toll plaza at Hung Hom. The collector will register pay ment by means of a keyboard which will transmit to a computer the class of vehicle and toll paid and at the same time indicate visually to the drivers that payment has been register- ed and to the toll supervisor what class of vehicle was registered.

The administration building, pro- viding about 25,000 sq.ft. of floor

space on five floors, will house the control room and toll-collection equip- ment, administration offices and mess- ing facilities for the staff.

In the control room the tunnel supervisor will receive information on all operations in the tunnel. Informa- tion from all plant, measuring devices and closed-circuit television will be monitored to this room and the super- visor will have direct telephone con- tact with all operating staff and out- side emergency services such as police and fire services.

Contract

Tenders were invited in the autumn of 1966 for construction of the tunnel with contractor finance welcomed.

Bids were returned early in 1967, the successful contractor being lowest ten- derer, but the political and financial climate at that time brought negotia- tions to a standstill and it was not un- til early last year that negotiations were re-opened.

The contract for the construction of the tunnel was signed on 26th June 1969, in the sum of HK$272,533,333, and work commenced at the beginning of September 1969.

The first months were spent as- sembling plant and preparing the site at Hung Hom. In November 1969 work began on the bored-pile walls for the north ramp and in January 1970 steel-plate preparation began in the fabrication yard.

*

This feature by Mr. K.A. Phillips, DIC, FICE, FASCE, is based on a paper, 'The Cross-Harbour Tunnel', presented by him to the May meeting of the Engineering Society of Hong Kong. It is published by kind permis- sion of the Society.

Road and flyover networks are be- ing constructed at both accesses to the cross-harbour tunnel. These will be described in future articles in Far East Builder.

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Far East BUILDER, June 1970