Building Embankments on Swamp (Vozvedeni Nasypei na Bolotakh),

The provision of the reliable operation of road surfacing under the effect of heavy loads in the presence of soils having low bearing capacity has always caused great difficulties. Usually for improving the soil conditions, the soft soils are either reinforced or they are replaced by harder ones. In the construction of a road surfacing, as a rule the topping is not placed directly on the soil but on a sandy base with a thickness up to 1 m for transferring pressure from the traffic load to a fairly large surface of soil in order that the permissible pressure on the soil would not be exceeded. For the proper fulfillment of its function, the underlying layer of sand should be dry this is possible only with good water drainage. With the new design, the underlying sand layer and drainage are not needed. In the sectors with unfavorable soil conditions, it is proposed to lay a ferroconcrete covering strip with a thickness of 10-15 cm. Author