The double shield TBM, manufactured by China Railway Construction Heavy Industry Corporation Ltd (CRCHI), began normal excavation on September 29 after completing the guided tunnel stepping works at Ingenbohl, on the eastern side of Lake Lucerne.
The water conveyance tunnel, which will connect Ingenbohl city with the resort of Brunnen, will be approximately 1.2km long and have a drainage capacity of 2800m3 per hour. It is expected to be completed next year.
The TBM is about 110m in length and has 1700KW of installed power. It is equipped with anchor drilling rigs, concrete spraying equipment, advanced drilling and detecting devices, and supporting devices.
