Expertensystem fuer Laerm- und Erschuetterungsprognosen beim Einbringen von Spundbohlen

Noise and vibration emissions are produced when a hammer or vibrodriver are used to introduce sheet-piling elements and steel beams. An expert system reported on here makes it possible to predict the expected amplitudes of vibration during pile-driving. It estimates the accelerations, velocities and displacements at the surface of the ground and in buildings (foundation, upper storey, ceilings), and compares them with permissible reference values laid down in standards (e.g. DIN 4150, Parts 2 and 3). The reference values provide information on whether considerable annoyance is caused to people living nearby and whether damage is caused to buildings. If the permissible values are exceeded, then the permissible values for equipment for driving in (e.g. permissible energy) and the permissible minimum distance between the emission point and the immission point will be calculated. The system can also produce a noise chart. In addition to the vibrations calculated by the expert system, this dissertation also shows a way to calculate the upper limits for the stresses in buildings and for the vertical vibrations of ceilings during the introduction of sheet pile elements by a hammer. It thus takes account of previous knowledge about the velocity of vibrations at the foundation in the time and frequency domain. The estimated stresses can be used to predict the damage that may be caused to buildings. (orig.)SIGLEAvailable from TIB Hannover: RO 10(1996,2)+a+b / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman