Study of the Operating Modes of Drainage Layers in Road Construction

Abstract

The work presents the study of working conditions of draining layers with crushed fraction 20 – 40 mm, and with medium grained sand in complex with tubular transverse shallow drainage. Investigations have been carried out on the construction of a road structure, the dimensions of which correspond to the field conditions. Investigations measured the amount of drained water from the trench and the time it was drained. On the basis of the results obtained, the operating modes of the drainage structures are determined, which depends on the properties of the fillers and the withdrawal time. Both types of construction are divided into short-term and long-term modes in terms of water discharge intensity. According to these regimes, the average discharge intensity of each type of drainage structure was determined and differed significantly. The work of two drainage structures was also analyzed: the drainage structure with the gravel layer worked on the drainage principle, as opposed to the drainage structure with the sand layer - on the absorption principle.