Single Shield TBM: Safety in Fractured Rock

Single Shield TBM: Reliable Protection in Unstable Rock

Not all rock is solid. When tunneling through faulted zones, fractured rock, or mixed ground, user safety and tunnel stability are paramount. The Single Shield TBM is the ideal solution for these hazardous conditions, providing continuous protection and support.

Design and Operation

The Single Shield TBM features a full-length shield that covers the machine's internal components. As the cutterhead excavates, the shield supports the surrounding ground, preventing rockfalls. The machine advances by pushing against the precast concrete segments that are installed in the tail of the shield. This ensures that the tunnel is lined and supported immediately after excavation.

When to Use a Single Shield TBM

Fractured Rock: Where the risk of tunnel wall collapse is high. Mixed Ground: Where short sections of soft ground may be encountered within rock formations. Urban Rock Tunneling: Where surface settlement must be strictly controlled even in rock.

Advantages

While not as fast as a Double Shield in perfect conditions, the Single Shield TBM offers superior safety and reliability. It eliminates the need for complex gripper systems, making the machine shorter and easier to steer.

Ensure the safety of your crew and the integrity of your tunnel. Choose a Single Shield TBM for reliable performance in challenging geological environments.