Vibro-replacement

Vibro-replacement compaction

Vibro-replacement compaction

Vibro-replacement compaction
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

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.

Deep compaction with the vibro-replacement method

  • The so-called bottom feed vibrator which penetrates a fine grained, non-compactable soil is fitted with a device for addition of material.

    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.

  • Vibration is carried out under addition of compressed air emerging at the vibrator tip and supporting the vacated space.

    Installation with compressed air

    Vibration is carried out under addition of compressed air emerging at the vibrator tip and supporting the vacated space.

  • 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.

    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.

  • Repeated lowering of the vibrator compacts the added material. Moreover, it is densely pressed and/or stuffed into the adjacent soil.

    Vibro-replacement

    Repeated lowering of the vibrator compacts the added material. Moreover, it is densely pressed and/or stuffed into the adjacent soil.

  • Alternating hoisting and lowering of the vibrator combined with batch filling with material produces a so-called vibro-replacement column.

    Vibro-replacement column

    Alternating hoisting and lowering of the vibrator combined with batch filling with material produces a so-called vibro-replacement column.

  • Filling with extraneous material with subsequent stuffing creates a load-bearing gravel column with a greater strength than the untreated ground.

    Foundation concept

    Filling with extraneous material with subsequent stuffing creates a load-bearing gravel column with a greater strength than the untreated ground.

  • 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.

    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.

  • Vibro-flotation

    Vibro-floating compaction

    Vibro-floating compaction

    Vibro-floating compaction
    The process of vibro-flotation:
    1. Vibrator is hoisted on position
    2. Vibration is activated and rope slowly lowered. Supported by jetting force of the pressurised water.
    3. After projected depth water jetting is reduced
    4. Pulling step by step under vibration. Funnel-shaped settlement is filled by adding gravel.
    5. Compacted soil structure of cylindrical shape

    For vibro-flotation non-cohesive soil is compacted using a vibro-flot. The vibro-flot is mounted on the lower end of a pipe on a lift crane, duty cycle crawler crane or rig, either free hanging on ropes or via a leader and sunk into the ground. Through the vibration the soil grains change from their initial loose layering to a denser layering. Around the vibrator a cylindrical compacted soil structure is created.

    Deep compaction with the vibro-flotation method

  • Thanks to the vibration effect and to its own weight the deep vibro-flot penetrates the ground.

    Vibro-flotation

    Thanks to the vibration effect and to its own weight the deep vibro-flot penetrates the ground.

  • In order to support the installation process, jetting water or compressed air emerging from the vibrator tip are added.

    Flushing water

    In order to support the installation process, jetting water or compressed air emerging from the vibrator tip are added.

  • Extraction of the vibro-flot is executed in predetermined hoisting steps and intervals. Thereby the surrounding soil is compacted.

    Compaction

    Extraction of the vibro-flot is executed in predetermined hoisting steps and intervals. Thereby the surrounding soil is compacted.

  • While the soil is compacted step by step, coarse material is filled into the funnel-shaped settlement.

    Addition of material

    While the soil is compacted step by step, coarse material is filled into the funnel-shaped settlement.

  • Reinforced cylindrical ground structures are created at the compaction points. These are arranged in various grid patterns and so a systematic compaction of the building ground is achieved.

    Foundation concept

    Reinforced cylindrical ground structures are created at the compaction points. These are arranged in various grid patterns and so a systematic compaction of the building ground is achieved.

  • Vibro-flotation is intended for compacting loose soil types and artificial fills, so leading to an area-wide improvement of the building ground.

    Range of application

    Vibro-flotation is intended for compacting loose soil types and artificial fills, so leading to an area-wide improvement of the building ground.

  • Video vibro-replacement

    An LB 24 rotary drilling rig equipped with a bottom feed vibrator
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    The video shows an LB 24 rotary drilling rig in operation with a deep vibrator mounted on the leader. Play video
    An LB 24 rotary drilling rig equipped with a bottom feed vibrator
    We need your consent 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 expressly 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" 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 suitable 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, criminal prosecution or for other purposes in the public interest of the USA, possibly without you being informed separately and without enforceable rights and effective means of redress 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, Irland; Mutterunternehmen: Google LLC, 1600 Amphitheatre Parkway, Mountain View, CA 94043, USA

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