How much does dynamic compaction cost?

Depending on the number of passes, grid dimensions and size of the project, cost can vary from $1 per square foot to more than $2 per square foot. The design of a dynamic compaction program may vary from $20,000 to $40,000 depending on the complexity of the project.

Where do we use dynamic compaction?

Dynamic compaction is often used on new reclamations to compact the subsoil up to requirements to avoid liquefaction under an earthquake. The solution is also in high demand to improve the bearing and settlement characteristics of the top layers .

Who invented dynamic compaction?

Louis Menard
Dynamic compaction (DC), also known as dynamic deep compaction, was advanced in the mid-1960s by Louis Menard. The process involves dropping a heavy weight on the surface of the ground to compact soils to depths as great as 12.5 m.

What is dynamic compaction discuss how it is carried out?

Dynamic compaction is a ground improvement technique that densifies soils and fill materials by using a drop weight. The ground is subjected to repeated surface tamping using a heavy steel and concrete weight. Typically the tamper weighs between 10 and 12 tonnes, dropping in free fall from heights of up to 10 metres.

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 the difference between static and dynamic compaction?

Answer: Static compaction gives higher value in density of soil and CBR values. Whereas, the dynamic compaction applied onto Soil A specimen has given the value of MDD= 1.74 Mg/m3, and the CBR value was 20.14\%.

What are the types of dynamic compaction?

Common dynamic compaction techniques include:

• the Dynamic Compaction (or Heavy Tamping) method,
• the Rapid Impact Compaction (RIC), and.
• the High Energy Impact Compaction (HEIC) techniques.

What is dynamic compaction of soil?

Dynamic compaction is a method that is used to increase the density of the soil when certain subsurface constraints make other methods inappropriate. It is a method that is used to increase the density of soil deposits. The process involves dropping a heavy weight repeatedly on the ground at regularly spaced intervals.

What are the merits of dynamic compaction techniques?

Advantages

• Densify and compact soil to a depth of 12m.
• Effective in various soil conditions.
• Cost effective.
• Dramatic cost savings in excess of deep foundations and most undercut and replace options.
• Accelerate schedules.
• Mitigate soil liquefaction.
• Improves bearing capacity of soil.
• Decreases the volume of landfill waste.

What is dynamic replacement?

Dynamic Replacement (DR) is the variation of Dynamic Compaction, and consists in delivering impact energy to the ground by means of dropping a large mass from a significant height.

What is CBR value?

The California Bearing Ratio (CBR) is a measure of the strength of the subgrade of a road or other paved area, and of the materials used in its construction. The ratio is measured using a standardized penetration test first developed by the California Division of Highways for highway engineering.

What is static compaction?

A static compaction method is described to determine equivalent static pressure equivalent to the standard, reduced standard and the reduced modified Proctor test. The relationship between water content and dry unit weight corresponding to different static pressure is found to be parabolic in nature.