Double Shield TBM: High-Speed Tunneling in Hard Rock

Double Shield TBM: The Speed Champion of Hard Rock

In long tunnels through stable rock, speed is everything. The Double Shield TBM is designed to deliver exactly that. By decoupling the excavation and lining processes, this sophisticated machine can drill and install tunnel segments simultaneously, offering unrivaled advance rates.

How Double Shield Technology Works

A Double Shield TBM consists of two main parts: a front shield with the cutterhead and a rear shield with the gripper system. A telescopic section connects them.

In stable ground, the side grippers extend against the tunnel wall to provide reaction force. The front shield pushes forward to excavate while the rear shield remains stationary, allowing workers to install concrete segments. This "continuous mining" capability is what makes the Double Shield TBM so fast.

Versatility in Changing Ground

If the rock becomes unstable or fractured, the machine can retract its grippers and operate in "Single Shield Mode," pushing off the installed segments like a standard TBM. This flexibility makes it a safe choice for long tunnels with variable geology.

Ideal Applications

Long Railway Tunnels: Where project timelines are critical. Water Conveyance: Perfect for long, straight drives through mountain ranges.

Don't compromise on speed or safety. Deploy a Double Shield TBM for your next major rock tunneling project and experience the pinnacle of excavation technology.