ZLV Online

Abstrakt

The article presents results of the research of selected features effecting pavement damage of forest haul roads. The study is based on off-road measurement carried out in a model flysch territory in the Beskydy Mts. (North Moravia). We investigated some technical parameters of forest roads and constructional damage of their pavement or ground plains surface. The forest haul road-net in the model territory of Ostravice forest district was intersected by transects and, following the methodology, in the place of the intersection 100m long haul road stretches were measured minutely. Beyond commonly accepted proposed damage for purpose-built roads (i.e. max 25% of the road surface suffered from constructional damage) 12.16% of roads with bitumen pavement, 17.75% roads with gravel pavement, and 31.45% of ground haul roads were damaged. As for bitumen roads, the most frequent damage was broken edge, and as for gravel and ground haul roads it was visible pavement rutting. Damage was mainly related to insufficient load-carrying capacity of roads and pavements. Different levels of damage were found out for individual surface types; it was discovered that the road and surface capacity varied in real forest traffic. A weak negative dependence between altitude and bitumen roads damage was found out as well as between road width and gravel or ground transport roads damage. The expected damage dependence on the state of longitudinal drainage was not confirmed.