摘要:
In the method some existing surface of a bearing course (120) of a traffic route is first chosen as the reference level (100), in relation to which the target level (150) of a surface of a bearing course to be formed is determined. For example the upper surface of a surface layer of a traffic route can be chosen as the reference level. After this the forming procedure of a bearing course is performed, in which the surface of a bearing course is brought to the target level. Typically the forming procedure of a bearing course comprises spreading, levelling and compacting of a soil layer on the surface of the reference level. The location of a traffic route is determined in the terrain as plane coordinate points (x n , y n ) and the elevation z n of an existing bearing course chosen as the reference level is determined in each coordinate point (x n , y n ) as cross sectional figures extending from the unchanged terrain on the first side of the traffic route over the surface of the traffic route to the unchanged terrain on the second side of the traffic route. The coordinate points (x n , y n ) of the location are determined with a satellite positioning method. The measurement data is saved as spatial coordinate points (x n , y n , z nr ) into a given value data file (242), which is used in the later stages of the forming of the bearing course. The elevations z nm of the level of the upper surface of the bearing course formed and the elevations z nr of the reference level are determined in the coordinate point (x n , y n ) of the traffic route with laser scanning. The laser scanning can be performed form a vehicle (300) travelling along the traffic route and/or a construction machine participating in the forming of the bearing course, travelling along the traffic route.
摘要:
The method is meant for the evaluating of the amount of micro and macro cracks in the pavement of a traffic lane, such as a road or street. The colder water beneath the pavement is under the load of heavy traffic pumped into the micro and macro cracks in the pavement and lowers the temperature of the pavement, so a large difference between the temperatures in different points on the pavement reveals a large amount of cracks. In the method, the examination span of the traffic lane is first selected. Thereafter the temperature T1 of the heavily loaded part of the pavement of the selected examination span and the temperature T2 of the lightly loaded part of the pavement of the same examination span are determined. A difference AT between the determined temperatures is calculated, which difference is compared to a reference value. If the difference is larger than the used reference value, the pavement lets through a significant amount of water. If the difference is smaller than the used reference value, the condition of the pavement is sufficiently good. The temperatures t r of the heavily loaded part of the pavement are measured at the wheel ruts and the temperatures t k of the lightly loaded part of the pavement are measured in the area outside the wheel ruts. The temperatures of the pavement are measured with an apparatus, which is placed in a vehicle travelling on the traffic lane. Alternatively the emissivity ε r of the heavily loaded part of the pavement and the emissivity ε k of the lightly loaded part of the pavement can be determined and the difference Δε can be compared to a reference value.