PROVISIONAL RECOMMENDATIONS FOR ENGINEERING/BIOLOGICAL WORK ASSOCIATED WITH ROAD CONSTRUCTION

VORLAEUFIGE RICHTLINIEN FUER INGENIEURBIOLOGISCHE ARBEITEN I M STRASSENBAU

RAPID SECURING OF AREAS WHERE EARTHWORKS HAVE BEEN COMPLETED CAN BE CARRIED OUT MOST ECONOMICALLY BY THE PLANTING OF GRASS. THEREFORE IN THIS AREA DURING THE LAST 10 YEARS NUMEROUS PARTIALLY MECHANIZED METHODS HAVE BEEN DEVELOPED, ABOUT WHICH SOME POSITIVE AND SOME NEGATIVE EXPERIENCE HAS BEEN GAINED. THE TECHNICAL EFFICIENCY, APPLICABILITY, DEVELOPMENT AND ECONOMIC JUSTIFICATION OF THESE METHODS CAN ONLY BE CLARIFIED BY AN ACCURATE COMPARISON OF THE INDIVIDUAL METHODS UNDER VARIOUS SUBSOIL CONDITIONS. TO REDUCE THE COSTS OF MAINTAINING GREEN AREAS BY ROADS, THE EFFECT AND ECONOMIC EFFICIENCY OF VARIOUS METHODS OF CARE, ESPECIALLY FOR GRASSED AREAS, ARE TO BE STUDIED. THE NUMEROUS BRIDGE STRUCTURES WHICH ARE REQUIRED FOR ROADS BUILT IN MOUNTAINS RESULT IN DRAINAGE PROBLEMS WHICH CAN OFTEN ONLY BE OVERCOME ECONOMICALLY BY THE USE OF ENGINEERING/BIOLOGICAL METHODS. THE RE-CULTIVATION OF AREAS BELOW LOW AND WIDE BRIDGES CAUSES CERTAIN DIFFICULTIES BECAUSE OF THE LOCAL CONDITIONS CREATED BY THESE OBJECTS, AND NECESSITATES METHODS THOSE EFFICIENCY NEEDS TO BE CLARIFIED. STUDIES ARE ALSO TO BE CARRIED OUT OF THE EFFECT OF GROWTH-PROMOTING AND GROWTH-RETARDING CHEMICALS ADDED TO GRASS SEEDS.