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Author(s):	Kister, Bernd; Hugenschmidt, Johannes
Title:
Abstract:	An der Hochschule Luzern wurde in den vergangenen zwölf Jahren ein Rating-System zur Beurteilung alter Stützbauwerke aus Natursteinmauerwerk entwickelt und bereits bei verschiedenen Projekten angewendet. Das Ziel dieses Rating-Systems ist es, sowohl den Zustand der Stützbauwerke als auch deren konstruktive Eigenschaften zu ermitteln und zu bewerten. Da Unterlagen zum Aufbau dieser Bauwerke in der Regel fehlen, wurde in einem Forschungsprojekt geprüft, welchen Beitrag zerstörungsfreie Prüfverfahren bei der Erkundung der konstruktiven Eigenschaften von alten Stützbauwerken aus Natursteinmauerwerk leisten können. Zum Einsatz kamen sowohl Verfahren mit akustischen Wellen als auch solche mit elektromagnetischen Wellen. Nachfolgend wird über die Ergebnisse verschiedener Messverfahren an einem ca. 5 m langen und 1, 8 m hohen, extra für das Projekt hergestellten Mauerwerksprobekörper sowie an einer bestehenden alten Stützmauer berichtet. Die Versuchsergebnisse zeigen, dass die Wahl der Messmethode auf die Art des Mauerwerks abgestimmt werden muss. Nondestructive testing assists the assessment of old retaining walls made of natural stonework During the last twelve years a rating system has been developed at the Lucerne University of Applied Sciences and Arts for the assessment of old retaining walls made of natural stonework. Up to now this rating system has been applied successfully in several projects. The goal of this rating system is to assess the as-is state of old retaining walls as well as their constructiveness. Unfortunately, in many cases there is no information available about the design and construction details. Therefore a research project has been carried out to evaluate the possible contribution of nondestructive testing for the investigation of the constructiveness of such walls. In this project different methods have been used with acoustic and electromagnetic waves. Data were acquired with those different methods on a test wall with a length of approximately 5 m and a height of 1.8 m. In addition, data were acquired on an existing old retaining wall on a Swiss pass road. The test results show that the selection of a test method for those old retaining walls made of natural stonework is highly dependent on the type of masonry of the retaining wall.
Source:	Bautechnik 94 (2017), No. 1
Page/s:	26-36
Language of Publication:	German

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