Sentence examples for rock tunnels from inspiring English sources
Portals of rock tunnels are often in soil or in rock weakened by weathering.
Steel-rib support with timber blocking outside has been widely employed in rock tunnels.
Most long-distance rock tunnels have encountered problems with water inflows.
Many short rock tunnels and vine-supported suspension bridges were constructed.
Deep rock tunnels for rapid transit between cities are beginning to receive very serious consideration.
In rock tunnels, the requirements for support can be significantly decreased to the extent that the construction method can preserve the inherent strength of the rock mass.
The New Austrian Tunneling Method (NATM) is the most popular construction method in rock tunnel projects.
Hoosac Tunnel, the first major rock tunnel built in the United States.
A rock tunnel leads to another small beach backed by vividly coloured cliffs.
At the time it was completed in 1875, the Hoosac Tunnel was the longest rock tunnel in the United States.
This section therefore emphasizes the usual rock tunnel, in the size range of 15 to 25 feet.
