You are here
Liebherr Group: Products & Services for France
Other websites for France
Vibro-replacement is used to improve cohesive soil types. Thereby, coarse extraneous material is filled into the vibrating hopper and a load-bearing gravel or crushed stone column is produced. If the crushed stone columns are arranged in a grid the building ground can be improved area-wide.
-
Leader
-
Top vibrator
-
Crowd winch
-
Steel pipe
-
Material feeder
The process of vibro-replacement
1. Positioning of the bottom-feed vibrator guided on the leader
2. Material bucked fills feeder pipe with intended material
3. Vibrator is put into operation and penetrates the ground down to the projected depth using rope crowd force and supported by compressed air. Soil is placed to the side.
4. Vibrator is pulled up a little, installation material is filled with compressed air, then pressed again while continuing to vibrate (“stuffed”).
5. Finished vibro-replacement column with better interlocking
Animation: Deep compaction with the vibro-replacement method
Vibro-Assistant
Foundation concept
Filling with extraneous material with subsequent stuffing creates a load-bearing gravel column with a greater strength than the untreated ground.
Dry process with material addition
The so-called bottom feed vibrator which penetrates a fine grained, non-compactable soil is fitted with a device for addition of material.
Installation with compressed air
Vibration is carried out under addition of compressed air emerging at the vibrator tip and supporting the vacated space.
Addition of extraneous material
After the final depth has been reached the vibrator is systematically hoisted. Gravel or crushed stone are filled in through the material feeder and emerge at the vibrator tip under addition of compressed air.
Vibro-replacement
Repeated lowering of the vibrator compacts the added material. Moreover, it is densely pressed and/or stuffed into the adjacent soil.
Vibro-replacement column
Alternating hoisting and lowering of the vibrator combined with batch filling with material produces a so-called vibro-replacement column.
Range of applications
Smaller groups of columns result in a selected soil improvement. An area-wide improvement with extensive column grids is applied, for example, under dams or foundation plates.
Video: Vibro-replacement
The video shows an LB 24 rotary drilling rig in operation with a deep vibrator mounted on the leader.
Get in touch
If you have any further questions, please contact our local sales or service team.
