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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.
Procedure for the production of vibro-replacement columns with top vibrator
1. Positioning the casing at the column point
2. Vibrating the casing down to the final depth, thereby pre-compacting the soil
3. After reaching the final depth, inserting the fill material into the receiver hopper and starting compaction
4. As the column is compacted, staged extraction of the casing, filling the cavity with fill material
5. Re-penetrating the casing to compact the fill material
6. Completed vibro-replacement column
Procedure for vibro-replacement with dry bottom feed vibroflot
1. Positioning the dry bottom feed vibroflot at the compaction point
2. Penetration of the dry bottom feed vibroflot with compressed air feed, thus pre-compaction of the soil
3. After the final depth has been reached, filling with fill material into the fill hopper and starting compaction
4. During replacement, staged extraction of the vibroflot and filling of the cavity with fill material
5. Re-penetration of the vibroflot to compact the fill material
6. Completed vibro-replacement column
Animation: Deep compaction with the vibro-replacement method
Vibro-Assistant
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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.
This YouTube video is provided by Google*. If you load the video, your data - including your IP address - is transmitted to Google and may be stored and processed by Google inter alia in the USA. We have no influence over further data processing by Google.By clicking on "Accept", you consent to the transmission of data to Google for this video in accordance with Art. 6 (1) (a) GDPR and at the same time explicitly consent to the transfer of data to the USA in accordance with Art. 49 (1) (a) GDPR. If you no longer wish to consent to each YouTube video individually in the future and wish to be able to load the videos without this blocker, you can also select "Always accept YouTube videos" and thereby consent to the associated data transmissions and transfers to Google and to the USA for all other YouTube videos which you open on our website in the future. Please note that, in the opinion of the European Court of Justice, there does not currently exist an adequate level of data protection in line with EU standards in the USA, and at present we cannot provide appropriate safeguards to protect your data and offset this shortcoming.Possible risks to you of data transfer to the USA are that access by state authorities cannot be excluded and that your data could be processed for reasons of national security, law enforcement or for other purposes in the public interest of the USA, possibly without you being informed separately and without enforceable rights and effective legal remedies being available to you.You can withdraw consent that you have given at any time with future effect via the settings. For further information, please see our Data Protection Declaration and Google's Privacy Policy.*Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland; parent company: Google LLC, 1600 Amphitheatre Parkway, Mountain View, CA 94043, USA
