---
title: "Types of mechanical and dynamic compaction"
subject: "Foundation Engineering"
chapter: 10
key: "semester_5/foundation_engineering:mechanical-dynamic-compaction-names"
source: https://www.bctengineer.com/q/semester_5/foundation_engineering/mechanical-dynamic-compaction-names
site: BCT Engineering
---

# Types of mechanical and dynamic compaction

Foundation Engineering · Chapter 10: Foundation Soil Improvements

- Asked in: 2078 Bhadra, 1 marks
- Video: [Soil Stabilization | C7-L14 | Ground improvement: DEEP COMPACTION](https://www.youtube.com/watch?v=ViHZ2Oqhm8c) — المقررات المفتوحة - Open Courses
- Answer checked by Claude Sonnet 5.5 on 2026-10-14
- Page: https://www.bctengineer.com/q/semester_5/foundation_engineering/mechanical-dynamic-compaction-names
- Whole chapter: https://www.bctengineer.com/md/semester_5/foundation_engineering/chapter-10

## Question

Write down names of different types of mechanical and dynamic compaction used with regard to foundation soil improvements.

## Short answer

Mechanical compaction: smooth-wheeled, sheepsfoot, pneumatic-tyred, vibratory rollers and rammers. Dynamic compaction: heavy tamping, vibroflotation, vibro-compaction, blasting, compaction piles and stone columns.

## Answer

**Mechanical compaction (surface):** smooth-wheeled rollers, sheepsfoot rollers, pneumatic-tyred rollers, vibratory rollers, and rammers or tampers.

**Dynamic (deep) compaction:** dynamic compaction (heavy tamping), vibroflotation, vibro-compaction, blasting, compaction piles, and vibro-replacement (stone columns).

## Check yourself

The answer's key points as multiple-choice questions, with the correct option and why.

1. Which is a surface mechanical compaction method?
   A. Blasting
   B. Sheepsfoot roller
   C. Vibroflotation
   D. Vibro-replacement
   Answer: B. Smooth, sheepsfoot, pneumatic and vibratory rollers are surface compactors. (Key point: Surface compaction equipment)

2. Which is a dynamic (deep) compaction method?
   A. Smooth-wheeled roller
   B. Rammer
   C. Vibroflotation
   D. Pneumatic-tyred roller
   Answer: C. Vibroflotation is a deep method along with heavy tamping, blasting and compaction piles. (Key point: Deep compaction methods)

3. Vibro-replacement (stone columns) is classed under which?
   A. Chemical stabilization
   B. Surface compaction
   C. Dynamic (deep) compaction
   D. Dewatering
   Answer: C. It is listed with the dynamic (deep) methods. (Key point: Stone columns classification)

## Related in Foundation Engineering

- [Dynamic compaction](https://www.bctengineer.com/question.md?key=semester_5%2Ffoundation_engineering%3Adynamic-compaction) — Foundation Engineering, chapter 10
- [Purposes of foundation soil improvement](https://www.bctengineer.com/question.md?key=semester_5%2Ffoundation_engineering%3Asoil-improvement-purposes) — Foundation Engineering, chapter 10
- [Sand compaction piles and stone columns](https://www.bctengineer.com/question.md?key=semester_5%2Ffoundation_engineering%3Asand-compaction-piles-stone-columns) — Foundation Engineering, chapter 10, asked 3×
- [Methods of soil stabilization](https://www.bctengineer.com/question.md?key=semester_5%2Ffoundation_engineering%3Asoil-stabilization-methods) — Foundation Engineering, chapter 10, asked 2×
- [Why dynamic pile formulae are inaccurate](https://www.bctengineer.com/question.md?key=semester_5%2Ffoundation_engineering%3Adynamic-formula-inaccurate) — Foundation Engineering, chapter 8
- [Arching in soil and its requirements](https://www.bctengineer.com/question.md?key=semester_5%2Ffoundation_engineering%3Aarching-requirements) — Foundation Engineering, chapter 4, asked 8×

## Related in other subjects

- [Soil structures by compaction; DDL](https://www.bctengineer.com/question.md?key=semester_4%2Fsoil_mechanics%3Asoil-structure-compaction-ddl) — Soil Mechanics, chapter 4
- [Soil stabilization factors; mechanical; cement-soil base](https://www.bctengineer.com/question.md?key=semester_7%2Ftransportation_engineering_ii%3Asoil-stabilization-factors-mechanical-cement-soil) — Transportation Engineering II, chapter 3
- [Effect of compaction on soil properties](https://www.bctengineer.com/question.md?key=semester_4%2Fsoil_mechanics%3Acompaction-effect-engineering-behavior) — Soil Mechanics, chapter 5, asked 3×
- [Foundation settlement, effects, black cotton soil](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Asettlement-black-cotton-062ba) — Building Technology, chapter 2