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Hong Kong JetSnake

Cleaning and Inspection of TBMs

OC Robotics have successfully delivered and commissioned a new JetSnake system to the Dragages/Bouygues joint venture in Hong Kong. Following trials of the first JetSnake system in Miami in 2013, Bouygues Travaux Publics (BYTP) ordered a system for the Tuen Mun Check Lap Kok Link (TMCLK) currently under construction between the mainland and Hong Kong International Airport.

Two sub-sea road tunnels, Hong Kong’s deepest and longest at 5km in length, will be built over the next three years using a world record 17.6m tunnel boring machine (TBM). Excavations will take place at up to 50m below sea level and under 5bar of pressure. For further details please see http://dragageshk.com/projects-post/tuen-mun-chek-lap-kok-link-northern-connection/

Improvements to the original JetSnake design include increased length, operation at higher pressures (up to 5bar), and advanced integration with the tunnel boring machine (TBM) for quicker installation and maintenance. Working in temperatures of up to 45 degrees Celsius and 100% humidity, the arm is equipped with a high pressure water jet for cleaning and a camera and lights for real time process monitoring and inspection. A new machine vision system has also been integrated to profile wear on the disks of the TBM cutting head