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Construction Methods

Construction Methods. Lecture 10 Compaction Equipment and Procedures. Compaction Equipment and Procedures. Types of Compaction Equipment. Compaction Equipment and Procedures. Types of Compaction Equipment. Compaction Equipment and Procedures. Sheepsfoot Rollers

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Construction Methods

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  1. Construction Methods Lecture 10 Compaction Equipment and Procedures

  2. Compaction Equipment and Procedures • Types of Compaction Equipment

  3. Compaction Equipment and Procedures • Types of Compaction Equipment

  4. Compaction Equipment and Procedures • Sheepsfoot Rollers • Sheepsfoot rollers are drums with a large number of projections. • These rollers are most effective in compacting clayey soils. • The area of each of these projections may range from 25 to 85cm2

  5. Compaction Equipment and Procedures • Sheepsfoot Rollers

  6. Compaction Equipment and Procedures • Tamping Foot Compactor

  7. Compaction Equipment and Procedures • Tamping Foot Compactor

  8. Compaction Equipment and Procedures • Tamping Foot Compactor • It is suitable for compacting all fined-grained soils, but is generally not suitable for use on cohesionless granular soils. • The compacted depth is limited to 20cm • This type roller does not adequately compact the upper 5 to 8 cm of the soil, therefore, for the last lift it should be followed with a pneumatic or smooth-drum roller.

  9. Compaction Equipment and Procedures • Tamping Foot Compactor

  10. Compaction Equipment and Procedures • Vibratory Rollers • Vibratory rollers are very efficient in compacting granular soils. • Vibrators can be attached to the following rollers • plate compactors, • smooth drum rollers, and • tamping foot rollers • Principles of vibratory rollers • The vibration is produced by rotating off-center weights

  11. Compaction Equipment and Procedures • Smooth Drum Vibratory Soil Compactor

  12. Compaction Equipment and Procedures • Smooth Drum Vibratory Soil Compactor • This roller uses vibratory action in conjunction with ballast weight of the drum to compact. • One of the most effective means of attaining density for cohesionless materials. • It is a relatively light roller therefore maximum loose-lift depth is 25cm

  13. Compaction Equipment and Procedures • Vibratory Tamping Foot Compactor

  14. Compaction Equipment and Procedures • Dual-Drum Vibratory Compactor • Use this roller to compact cohesionless subgrade, base courses, wearing surfaces, and asphalt

  15. Compaction Equipment and Procedures • Compaction in Confined Areas

  16. Compaction Equipment and Procedures • Compaction in Confined Areas

  17. Compaction Equipment and Procedures • Compaction in Confined Areas

  18. Compaction Equipment and Procedures • Dynamic Compaction • This process primarily consists of dropping a heavy weight repeatedly on the ground at regular intervals. • The weight of the hammer varies over a range of 8 to 35 tons. • The height of the hammer drop varies between 10 to 30 meter. • Can achieve densification to a depths of about 10 meter

  19. Compaction Equipment and Procedures • Selection of Compaction Equipment

  20. Compaction Equipment and Procedures • Selection of Compaction Equipment

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