Sentence examples for tunneling shield from inspiring English sources

Tunneling shield, machine for driving tunnels in soft ground, especially under rivers or in water-bearing strata.

Because he could not disturb street traffic with a trench, he was forced to drive the tunnel by underground methods and invented a cylindrical tunneling shield, powered by hydraulic rams; this shield actually antedated that built by James Henry Greathead for the Tower Subway in London.

In 1818 he patented the tunneling shield, a device that made it possible to tunnel safely through waterbearing strata.

Deeper tunnels are often excavated with the assistance of a tunneling shield, a box-like structure with small shutters opened to dig through.

The tunneling shield invented by Marc Isambard Brunel and used to build the Thames Tunnel was large and unwieldy.

In the United States he was consulted by James B. Eads on the construction of his steel bridge over the Mississippi River at St .Louis, Missouri, and, when the first Hudson River tunnel threatened to fail, Baker was called in to design a tunneling shield that allowed work to be completed.

Modern tunneling shields are essentially the same as the Greathead design; that is, powerful steel cylinders shoved forward by hydraulic jacks.

In addition, they resorted to compressed-air tunneling with shield and air lock, a technique almost unheard-of in mountain tunneling.

TunnelBear is a virtual private network (VPN) service, and it is designed to protect the data transferred by your computer over the internet, even on an open public network, by connecting your device to a secure server (sometimes called "tunneling") that shields your online activity from others.

Prediction of the tool wear and life, as well as secondary wear on machine components, in soft ground tunneling using shielded machines with a pressurized face has been a difficult task due to the lack of a universally accepted measurement system for soil abrasion.

Earth Pressure Balance shield tunneling has been successfully adopted for urban tunneling and has resulted in increases in working speed, savings of man-hours and improved safety.