The question “How deep does a vibratory rammer compact?” is as important for construction professionals as it is for DIYers. This is because only a robust, compacted ground guarantees the necessary load-bearing capability for paved areas, foundations, and excavations. In this article, you will discover the depth to which a modern vibratory rammer takes effect, the factors that influence compaction, and where the machines can best be used.

The depth is dependent on different factors, including, amongst others, the weight of the vibratory rammer, the impact energy, the particulars of the soil, the water content, and the lift height. In practice, vibratory rammers typically compact between 3 and 7 cm per cycle. That means:

• A “pass” is a run across the same area.
• 2–3 runs are sufficient to achieve almost complete compaction (up to 100% Proctor density).

For greater depths, a single rammer run is inadequate. For that reason, layer compaction is utilized:

• A layer of approx. 20 cm is applied.
• This layer is compacted with several rammer cycles.
• Then the next layer is up.

With this procedure, it is possible to have sturdy backfillings of 40 cm and more.

Vibratory rammers are particularly efficient for:

• Cohesive soils (loam, clay)
• Mixed-grain soils (silty sand, gravel-clay-mix)

Pure sand layers or coarse-grain materials are less suitable and often where vibratory plates are more effective.

1. Soil layers too thick: If more than 20 cm is applied, compaction does not reach the lower areas.
2. Too few passes: Just one pass is normally not enough.
3. Incorrect soil type: Vibratory rammers are not ideal for every type of soil.

 

Here you will find an overview of all Wacker Neuson vibratory rammers.