VIBROFLOTATION PDF

It is a Specialist Deep Foundation Technique used for Ground improvement to considerable depth, up to 75 meters. It uses a probe called Vibro-flot which could be powered electrically or hydraulically to strengthen the soil by deep compaction to make the soil suitable to support proposed imposed load. It involves the introduction of backfill granular material Sand or Granite to form Stone columns interlocking with surrounding soil. Treatment is to provide adequate bearing capacity; restrict total and differential settlements to acceptable magnitudes under the proposed loading and provide acceptable long-term performance of the treated ground.

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It is a Specialist Deep Foundation Technique used for Ground improvement to considerable depth, up to 75 meters. It uses a probe called Vibro-flot which could be powered electrically or hydraulically to strengthen the soil by deep compaction to make the soil suitable to support proposed imposed load. It involves the introduction of backfill granular material Sand or Granite to form Stone columns interlocking with surrounding soil. Treatment is to provide adequate bearing capacity; restrict total and differential settlements to acceptable magnitudes under the proposed loading and provide acceptable long-term performance of the treated ground.

Natural deposit as well as artificially reclaimed sand can be compacted to achieve desired bearing capacity and minimal settlement. This is used for purely sandy soil of loose constituent. This is installation of stone column made up of granite. This can be used in various soil type that includes Clay soft, firm, stiff , lateritic Soil, Sandy Clay of various constituent and Peaty Soil.. Vibro-Displacement This method is used where the environment plays a critical role in project.

It can be either top or bottom feed. Little or no water is used in the construction. The vibro-flot is inserted in to soil and the soil is displaced laterally as the stone column is being formed and compacted.

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Ground Improvement by Vibroflotation Method

The vibroflotation will compact the soil making it suitable to support design loads. It involves the introduction of granular soil to form interlocking columns with surrounding soil. The technique is used to improve bearing capacity and reduce the possibility of differential settlements that might be allowed for the proposed loads. The compaction of soil can be obtained in soils as deep as feet. The risk of liquefaction in an earthquake prone area is also drastically reduced. Vibroflotataion Techniques Vibroflotation can be obtained by using three different techniques: Vibro Compaction method- This method allows granular soils to be compacted. This method is only used to compact sandy soils.

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Vibroflotation

Introduction Loose soils are a well documented problem, common in the construction industry. Immediate settlements of 1 inch per foot depth of loose sand can occur in worst-case scenarios. The term vibroflotation is often used interchangeably with vibrocompaction in the literature. However vibrocompaction is a broader term that encompasses two different techniques. The first is vibroflotation, which uses a vibroflot that vibrates horizontally. The second utilizes a vibrating probe which vibrates vertically.

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