What are Consequences of Poor Snow Compaction?

Compaction Risks: Quinzhee Building

When building a quinzhee shelter, poor snow compaction can compromise the structural integrity of the snow walls. Snowbridges, the weak spots between the quinzhee’s roof and walls, are more likely to form and fail if the snow is not adequately compacted. A well-compacted quinzhee reduces the chance of these bridges, which can lead to a more stable shelter.

Compaction Techniques

Effective snow compaction involves repeated layers of snow being applied and then trampled or compacted using a tool or a weighted object. Aim for 2-3 compacted layers per foot of quinzhee height to ensure stability. Trampling or stomping should occur after 2-3 inches of new snow is added, until you reach the desired height. Compacting too much snow in one go can lead to the formation of ice crystals, reducing the overall strength of the shelter.

Compaction Considerations for Quinzhee Building

For optimal snow compaction in quinzhee building, choose snow with a moisture content between 10% and 15%. Avoid using powdery or wet snow, as this can lead to structural instability. Also, be mindful of wind direction and snowdrifts, as these can impact the quinzhee’s overall shape and stability.