Creating solutions

works begin at south ventilation building to admiralty tunnels site

Works begin at South Ventilation Building to Admiralty Tunnels site

Intrafor has just launched the works of the South Ventilation Building to Admiralty Tunnels site in Hong Kong (SCL 1128) as part of the Shatin to Central Link scheme. This project, commissioned by MTR Corporation, aims to the extension of the railway network connecting the New Territories and Kowloon to HK Island. Intrafor will execute the construction of two launch shafts for the excavation of four new underground tunnels and of one shaft for a new ventilation building. The three shafts will be constructed using diaphragm wall techniques. Intrafor will also execute ground improvement treatments – including TAM (Tubes à manchettes), jet grouting and compensation grouting – along the tunnels’ alignment.

gathering expertise to build canopy pipes at hong kong link road

Gathering expertise to build canopy pipes at Hong Kong Link Road

As part of the Hong Kong Link Road 03 (HKLR 03) contract, Intrafor is going to start constructing canopy pipes underneath the Airport Express Railway (AEL), the railroad connecting the airport to Hong Kong Island. This stage of the project includes the drilling and the grouting of 44 steel-casing pipes (813mm OD). This pipe roofing system will stabilise the ground, avoid the settlement and protect the workers during the box jacking and the excavation of the tunnels passing under the existing railway. Its construction will be performed using two tailor-made Front-Steer drilling rigs suitable for mixed ground conditions (rock and soil), developed in collaboration with two international suppliers. Works will begin in April 2015 and will last for six months. .


Quieter crossing in Slovakia

Installation of a post-tensioned deck was chosen as a quieter alternative than the traditional steel for a rail bridge crossing the Váh River in an urban area of Trenčín in Slovakia. The new bridge is being built as part of the upgrade of the Nové Mesto nad Váhom – Púchov railway. The project for Slovak Railways is being co-financed by EU funds and built by Bögl and Krýsl to a design by Betoning. The seven-span viaduct is 340m long and is being constructed by the balanced cantilever method. VSL is supplying tie bars and post-tensioning, together with PT-Plus® ducting.