A tunnel is an underground passageway, dug through the surrounding soil/earth/rock and enclosed except for entrance and exit, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods.
Three times per year, TBM: Tunnel Business Magazine recaps the status of major tunneling projects underway in the United States and Canada. Below is the Tunnel Update that appeared in the October 2017 issue of the print edition.
Three times per year, TBM: Tunnel Business Magazine recaps the status of major tunneling projects underway in the United States and Canada. Below is the Tunnel Update that appeared in the February 2018 issue of the print edition.
Underground Construction (Tunneling) U.S. Department of Labor Elaine L. Chao, Secretary Occupational Safety and Health Administration John L. Henshaw, Assistant Secretary
A 12.24 km long tunnel between Maroshi and Ruparel College is being excavated by tunnel boring machine (TBM) to improve the water supply system of Greater Mumbai, India.
A virtual private network (VPN) extends a private network across a public network, and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network.
3. Methodology. In order to find out the requirements for the deliverables of the Working Group, use cases were collected. For the purpose of the Working Group, a use case is a story that describes challenges with respect to spatial data on the Web for existing or envisaged information systems.
Centurion electrical control system . The Centurion electrical control system provides superior performance, monitoring, and data integration capabilities.
The 4800XPC electric rope shovel, featuring Adaptive Controls technology, is specifically designed for three-pass loading of 327 to 363 mt (360 to 400 st) ultra-class haul trucks.
Features. Complete system, includes gel box power supply and casting sets; Quick and easy gel casting, no clamps or spacers required; Compact design, footprint: 7 x 5.1"
KAMY series of Roadheaders offers the best cutting performance in a wide range of rock formations. Equipped with geometrically optimized transverse or longitudinal cutter heads, these flexible machines can be used to excavate subway tunnels, road tunnels, railway tunnels and water tunnels without using explosives.