BUILDING A LAUNCHING SHAFT AND CUT & COVER TUNNEL IN A DENSELY-POPULATED AREA
Building a launching shaft and cut & cover tunnel in a densely-populated area - Main contractor Bouygues Travaux Publics engaged Intrafor as specialist foundation contractor to help overcome the technical challenges of the Trunk Road T2 project, specifically the construction of the launching shaft and cut & cover tunnel which is on the critical path of the whole construction project, and which will be used for the assembly and launching of the tunnel boring machines.
BUILDING FIVE SHAFTS UP TO A DEPTH OF 84M
Building five shafts up to a depth of 84m - The Deep Tunnel Sewerage System is a waste-water superhighway for the future. To build the five shafts, VSL was selected because of its knowledge and experience of diaphragm-wall (D-wall) works built up over many years. In total, VSL built 724m of diaphragm wall with depths ranging from 42m to 84m below surface level, and including 150 D-wall panels with 5,150 tonnes of rebar fixed and installed.
BUILDING DIAPHRAGM WALLS TO REPLACE AN OLD BUILDING IN THE HEART OF HONG KONG
Building diaphragm walls to replace an old building in the heart of Hong Kong - The 44-year-old, 23-storey Hutchison House office tower in the Central District of Hong Kong Island is being converted into a new 41-storey building with three levels of basement by the end of 2023. VSL carried out ground investigations as well as the demolition of the existing pile cap of the old building and construction of the diaphragm walls, with the associated testing works.
INSTALLING A 573M-LONG SUBSEA STEEL CONDUIT TO CARRY A FIBRE- OPTIC CABLE
Installing a 573m-long subsea steel conduit to carry a fibre-optic cable - Hong Kong Telecommunications Ltd (HKT), one of the largest telecommunications companies in Hong Kong, decided to install a submarine fibre-optic cable to facilitate highspeed data connections for key clients in the central business district. VSL was hired to provide the means and method to install the conduit to take the fibre-optic cable beneath the seawall.
HONG KONG INTERNATIONAL AIRPORT | AUTOMATIC PEOPLE MOVER & BAGGAGE HANDLING SYSTEM TUNNELS
Hong Kong, Hong Kong
As part of the Three Runway System project for the extension of Hong Kong International Airport, VSL and INTRAFOR Hong Kong designed and built two tunnels under the Airport Express Line (AEL) railway while it remained in operation, using box jacking.
KAI TAK MTR STATION
Hong Kong, Hong Kong
Ahead of construction of a building located directly above Kai Tak MTR station, VSL installed an Automatic Deformation Monitoring System (ADMS) across 300 m of the underground railway tunnel, under tightly-controlled access conditions. The real-time information was used to prevent any impact of above-ground site activity on the safe operation of the tunnels.
CARRYING OUT FOUNDATION WORKS FOR TWO UNDERGROUND STATIONS IN EGYPT
Carrying out foundation works for two underground stations in Egypt - Phase 3 of Cairo Metro Line 3 is almost 17.7km in length and comprises 15 stations. VSL was therefore appointed to undertake the foundation works package for Sudan and Wadi El Nile stations, and formed a JV with Soletanche Bachy International and Orascom Construction for the project. The package includes the construction of permanent diaphragm walls, foundation barrettes and deep-grouted rafts at the two stations.
CARRYING OUT GROUND TREATMENT FOR TUNNEL CONSTRUCTION UNDER A LIVE RAILWAY
Carrying out ground treatment for tunnel construction under a live railway - The Three Runway System project is of such a scale that it is almost equivalent to building a whole new airport next to the existing Hong Kong International Airport. The project was divided into different packages, including the provision of a new 2,600m-long Automated People Mover and an equally long high-speed Baggage Handling System, for which Intrafor was hired.