CHANGE OF ROAD PROFILE AS A RESULT OF CREEP IN THE SUBSOIL

PROFILAENDERUNGEN BEI STRASSEN INFOLGE VON KRIECHVORGAENGEN IM UNTERGRUND

DURING ROAD BUILDING THE NATURAL EQUILIBRIUM OF THE SUBSOIL IS OFTEN DISTURBED THROUGH THE MOVEMENT OF EARTH MASSES. THE NECESSARY DISPLACEMENTS OF FORCE ARE ASSOCIATED WITH DEFORMATIONS OF THE SOIL WHICH, IN THE CASE OF COHESIVE MATERIALS, EXTEND BEYOND THE CONSTRUCTION PERIOD BECAUSE OF VISCOSITY. CREEP TAKES PLACE AND THIS IS SOMETIMES FOLLOWED BY CONSOLIDATION. THE RESULT IS A GENERAL MODIFICATION OF THE ROAD PROFILE CAUSED BY SETTLEMENT, HEAVE AND SLOPE MOVEMENTS. THREE TYPES OF SUBSOIL PROFILE ARE TO BE INSTRUMENTED AND OBSERVED IN SITU. THE ASSUMED PROCESSES ARE TO BE CHECKED BY LABORATORY TESTS AND CALCULATIONS.