GEOTECHNICAL METHODS WHICH CONTRIBUTE TO THE DESIGN OF ROADS

GEOTECHNISCHE METHODEN ALS BEITRAG ZUR DIMENSIONIERUNG VON STRASSEN

EFFORTS ARE BEING MADE TO EVALUATE THE USE OF GEOLOGICAL AND GEOPHYSICAL METHODS FOR DESCRIBING THE SUBSOIL AND THE OVERBURDEN WITH A VIEW TO SIMPLIFYING DESIGN AND MATERIAL CLASSIFICATION BEFORE THE SPECIFICATION OF A ROAD CONTRACT. BEFORE THE COMMENCEMENT OF ROAD CONSTRUCTION WORK THE FOLLOWING STUDIES HAVE TO BE CARRIED OUT: GEOLOGICAL SURVEY OF TERRAIN; PRODUCTION OF LONGITUDINAL AND TRANSVERSE PROFILES USING SEISMIC METHODS, GEOELECTRIC METHODS AND SOUNDING; EXAMINATION AND SAMPLES OBTAINED, AND HYDROLOGICAL STUDIES. DURING THE EARTHWORKS SAMPLES HAVE TO BE TAKEN CONTINUOUSLY, AND SOME OF THE STUDIES DESCRIBED HAVE TO BE MADE. SOIL MECHANICS DATA ARE MEASURED AT THE FORMATION LEVEL BEFORE AND AFTER IMPROVEMENT OF THE SUBSOIL. DATA OBTAINED BY SOIL MECHANICS METHODS AND GEOTECHNICAL METHODS ARE TO BE COMPARED FOR ACCURACY, RELIABILITY, COST, TIME SPENT AND APPLICABILITY TO ROAD CONSTRUCTION PROBLEMS. A GEOTECHNICAL METHOD IS TO BE SELECTED WHICH FACILITATES AN ECONOMIC AND COMPLETE DESCRIPTION OF THE SUBSOIL BEFORE THE COMMENCEMENT OF CONSTRUCTION WORK.