Question

In order to compact fill, it should be done in lifts no more than ______ deep.

Answer 1

In compaction of fill material, lifts should not exceed 15 diameters deep according to newer guidelines, unlike the older rule of thumb which suggested 7-8 diameters deep. This ensures adequate compaction.

Step-by-step explanation:

When compacting fill, the layers, also known as lifts, should not exceed a certain depth to ensure proper compaction and stability of the fill material. Although an older rule of thumb suggested that lifts should be 7-8 diameters deep, more recent research and guidelines propose that the lifts can be up to 15 diameters deep, depending on the equipment used and material properties.

To decide on the specific lift thickness, one must consider factors such as the type of compaction equipment, the soil characteristics, and project requirements. For example, fill compaction for a large construction project might adhere to these newer guidelines to achieve the required soil density and bearing capacity.