Mix soil to depths of 40 metres with Liebherr’s new mixing cutter

Noise-reduced and low-vibration methods for ground improvement are becoming increasingly important in infrastructure development. Liebherr presents such a solution with the LMC 80 cutter soil mixer. 

The LRB 23 or LRB 355 piling and drilling rigs serve as carrier machines for the LMC 80, providing a complete package. 

Features of the LMC 80

The mixing cutter LMC 80 can be applied for all types of mixable soil to install load-bearing or sealing elements for ground improvement. The four cutting wheels are driven by a maximum torque of 2x 80 kilonewton metres and achieve a maximum rotational speed of 30 revolutions per minute, depending on ground conditions.

Liebherr provides both the mixing cutter LMC 80 and the carrier machine for the application. Using an extension linkage, the compact piling and drilling rig LRB 23 can produce ground mixing elements down to depths of 36 metres, and the larger LRB 355 down to 40 metres.

Both versions can create panels with cross-sections ranging from 2,800 by 500 millimetres to 1,000 millimetres, depending on site requirements and ground conditions. For flexible use, the LMC 80 can be swivelled by 135 degrees around the mixing axis without moving the leader. 

Information is displayed vertically in real-time on the operator's monitor, even if the mixing element deviates. The LIPOS positioning system and satellite technology allow operators to align the LMC 80 with elevated accuracy. 

Vertical safety is integral to the machine 

Mounting the LMC 80 while the carrier machine is lying flat saves time and increases safety as no work can be carried out at height. The carrier machine's crowd winch lifts the mixing unit into the working position. 

To convert the LRB 23 or LRB 355 for piling or drilling applications, the mixing tool is simply replaced with a rotary drive, hammer, or vibrator.