What is vibro compaction?

Vibro Compaction is an established ground improvement method for stabilising granular soils such as loose sands, gravels and some hydraulic fills. The technique is primarily used for seismic mitigation and in-situ densification of loose sands up to 30m deep.

What is vibro flotation?

Vibro-compaction also known as vibro-flotation is a technique in which the density of granular soils are increased by the insertion of a heavy vibrating poker to desired depth. It is one of the most common ground improvement technique using vibration. Water flushing is done during the insertion process.

How does a vibrating compactor work?

Vibratory rollers produce vibrations by filling the drum with basalt. As the drum rotates so does the basalt. The basalt collides with the walls of the drum and produces vibrations. The magnitudes of these vibrations can be increased by increasing the weight of basalt.

Which is the best type of soil condition for vibro compaction?

Vibro compaction method is mostly suitable for fine granular soils with seismic risk. For this reason, experts suggest for land reclamation projects to decrease the risk of liquefaction.

What is deep vibro techniques?

Vibro techniques consist of large depth vibrators, typically about 300 to 500mm in diameters, which penetrate the ground to suitable depth and then constructing continuous columns up to the ground surface.

How does a vibratory hammer work?

A vibratory hammer is used to drive sheet piles, pipes or other elements into the soil by vertical vibrations. The adjacent soil particles are put into motion and thus the soil is ‘loosened’. The dynamic weight of the hammer will drive the elements into the soil (extracting is done with a crane).

What are the methods of installing a stone column?

The construction of stone columns involves creation of a hole In the ground which is later filled with granular fill / stone sand mixture and compacted to required strength. density is laid with a minimum thickness of 0.5m.

Which of the following is the limitations of vibro compaction or vibro flotation?

Vibro-compaction is only effective on granular and non-cohesive soils. Densification generally cannot be achieved when the granular soil contains more than 12-15% silt or more than 2% clay. A comprehensive analysis of the soil profile is needed with continuous sampling or in-situ testing.

How many inches can a plate compactor compact?

Units with more force will penetrate deeper into the soil. A rule of thumb is that a compactor will compact 1 inch of material for every 1,000 pounds of compaction force it exerts.

What are the merits and demerits of dynamic compaction?

Advantages of Dynamic compaction:

Compacts large areas of loose granular fills.
Reduces the volume of landfill waste.
Increases in situ density and the voids are collapsed.
Increased bearing capacity.
Reduces post-construction settlements.

What is advantage of using vertical drains along with pre loading?

Pre-load enables consolidation of soil in vertical direction only and hence sand drains in addition to pre-loading are used to accelerate the consolidation of soils. This results in reduction of lesser pre-load.

What is vibro compaction? Vibro Compaction is an established ground improvement method for stabilising granular soils such as loose sands, gravels and some hydraulic fills. The technique is primarily used for seismic mitigation and in-situ densification of loose sands up to 30m deep. What is vibro flotation? Vibro-compaction also known as vibro-flotation is a technique…