What is the maximum depth of roadway embankment per horizontal layer in loose measurement?

The maximum depth of roadway embankment per horizontal layer in loose measurement is crucial for ensuring proper compaction and stability of the layers. In practice, a depth of 200 mm is often recommended as it strikes a balance between managing the load effectively and enabling adequate compaction. This depth allows for the use of standard compaction equipment to achieve the desired density without risking insufficient compaction or excessive moisture content, which can lead to future settlement issues.

Layer depth can significantly affect the overall performance and longevity of the roadway. A layer that is too thick may not compact uniformly, leading to weaknesses in the embankment structure. The choice of 200 mm reflects industry standards that account for engineering best practices and field experiences. These guidelines ensure that each layer can achieve desired densities and that moisture levels are appropriate for compaction processes.

The other options of 150 mm, 250 mm, and 300 mm, while they may have their applications, do not align as closely with typical engineering guidelines for roadway embankment in loose measurement. Layers that are too thin may increase construction time unnecessarily, and layers that are too thick can lead to the compaction difficulties mentioned earlier. Thus, 200 mm is recognized as a practical and effective depth for roadway embank