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Tunnel Construction. Tunnels are dug in types of materials varying from soft clay to hard rock. The method of tunnel construction depends on such factors as the ground conditions, the ground water conditions, the length and diameter of the tunnel drive, the depth of the tunnel, the logistics of supporting the tunnel excavation, the final use and shape of the tunnel and appropriate risk management.
In computer networks, a tunneling protocol is a communication protocol which allows for the movement of data from one network to another. They can, for example, allow private network communications to be sent across a public network (such as the Internet), or for one network protocol to be carried over an incompatible network, through a process called encapsulation.
The tunnel was initially used only for rail freight serving the Waterloo Freight terminal, and later freight and passengers serving the Liverpool ship liner terminal. The tunnel's path is from Edge Hill in the east of the city to the north end Liverpool docks at Waterloo Dock. The tunnel is split into two tunnels with a short open air cutting ...
Wilcox Tunnel, which carries Wilcox Boulevard through Missionary Ridge and connects to Shallowford Road. Whiteside Tunnel (Missionary Ridge Railroad Tunnel) carries the Tennessee Valley Railroad Museum trains between East Chattanooga and Grand Junction. Construction of the tunnel was started by the Chattanooga, Harrison, Georgetown and ...
Support system designs exist for each of the main rock classes. These serve as the guidelines for tunnel reinforcement. Based on the computation of the optimal cross section, only a thin shotcrete protection is necessary. It is applied immediately behind the excavated tunnel face to create a natural load-bearing ring and minimize the rock's ...
The erector is a rotating system which picks up precast concrete segments and places them in the desired position. Several support mechanisms can be found behind the shield, inside the finished part of the tunnel, which are part of the TBM: dirt removal, slurry pipelines if applicable, control rooms, rails for transport of the precast segments ...
The tunnel system is a far cry from the lofty, high-speed, and autonomous hyperloop system Musk initially hoped to build with his tunnel-digging venture. Musk had envisioned sci-fi systems for ...
In computer networking, Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol used to support virtual private networks (VPNs) or as part of the delivery of services by ISPs. It uses encryption ('hiding') only for its own control messages (using an optional pre-shared secret), and does not provide any encryption or confidentiality of content ...