Aurecon Asia:Tseung Kwan O – Lam Tin Tunnel (TKO-LTT) – Before the blast
www.asiamanufacturingnewstoday.com currently sits in the top 70 manufacturing & technology media platforms for readership around the world. From vertical to volumetric As Hong Kong’s population grows, the scarcity of land poses challenges for transport and city planners alike. The utilisation of underground space plays an evermore important role in the sustainable development of Hong Kong. Numerous transport tunnels now weave their way under the Hong Kong landscape and TKO-LTT – Main Tunnels and Associated Works will be the latest. Drill and blast excavation for TKO-LTT will navigate through the fourth most densely populated country in the world. Aurecon’s use of a geographic information system (GIS) for the project’s Blasting Assessment Reports avoided the need to manually engineer vibration contours, and produced accurate 3D visualisations of blast plumes. Interactive 3D presentations of the blast plumes from GIS showed visually the relationship between built structures and the ground vibrations. In future, these 3D visualisations may also be helpful tools for communicating with stakeholders. Blasting through the problem The TKO-LTT – Main Tunnels and Associated Works is a dual two lane highway connecting Tseung Kwan O and East Kowloon. Together with the future Trunk Road T2 in Kai Tak Development and Central Kowloon Route, it will form the new strategic route network of Hong Kong. The tunnel and a significant amount of surface works are to be excavated using drill and blast. “As the manual process was being explained to us, we knew straight away that a spatial solution would bring better results.” Mike Pinkerton, Aurecon. Aurecon prepared the Contractor’s Blasting Assessment Reports for TKO-LTT – Main Tunnels and Associated Works in Hong Kong. With a geology of mostly hard granite the approach of drill and blast excavation was the most effective. There were two main environmental considerations for drill and blast excavation, both of which have mathematical formulas to model them against. […]