Bil- och järnvägstrafikens inverkan på inomhusmiljön med avseende på ljud och luft : - I planerade bostäder på Haga

Sammanfattning: NCC has given us a commission to investigate a planned housing area in Haga, Karlstad, situated close to the traffic route Hagaleden and the railway. The housing area consists of one hundred apartments in five different houses. The houses are linked to each other by balconies with glass panels. A long carport is situated between Hagaleden and the housing area to absorb part of the noise from the road. The design of the housing area is creating a silent backyard. The idea of building houses in this place is to create an attractive living in central town and close to the river. The air and sound level inside of the planned houses were studied. The major problem is that the noise from the railway traffic and the car traffic are of different kind. The railway traffic creates high maximum sound levels and the car traffic creates high equivalent sound levels. The different kinds of sound levels consist of high and low frequency which means that different measures have to be taken to reduce both types. The emission from the car traffic is the major problem for the air quality, but it is uncertain how much of the emissions that passes to the inside of the houses. The result shows that the noise is the main problem. Despite the suggested noise reduction measures, the noise exceeds the limits of the building regulations on the facade of the houses. If the houses are to be built, they will not fulfill the regulations on this point. The noise is the major problem but there are many other factors that influence the air and the sound in the buildings. This essay describes different factors and every part of it ends with a checklist that can be used to create a good indoor environment. It is important for the quality of the air in the apartments that the ventilation system is correctly dimensioned for the building and is well dimensioned. It is recommended that the ventilation system should be complemented with an air treatment unit. The purpose of this checklist is to find an easy way to ensure that the demands and regulations of the norms are fulfilled. The items are all listed in an appendix in the work, but they need to be developed to be used easily. In the conclusion a suggestion on measures that could make the environment in the apartments better is presented. For example, the design of the balconies has been changed to prevent the noise from getting into the backyard. Suggestions on measures on the outside of the buildings are also presented; an example of this is silent asphalt, an extended carport and noise barriers.