Filtern
Dokumenttyp
Schlagworte
- Fundamente (4)
- NDT (4)
- Ultrasonics (4)
- Foundations (3)
- Integrity testing (3)
- Parallel seismics (3)
- Piles (3)
- Zerstörungsfreie Prüfung (3)
- Dickenmessung (2)
- Foundation (2)
Organisationseinheit der BAM
ZfPBau-Kompendium 2004
(2007)
Dieses Kompendium ist ein kurzgefasster Abriss, ein Leitfaden und auch ein Handbuch der für den Einsatz im Bauwesen geeigneten zerstörungsfreien Prüfverfahren. In strenger, stets gleicher Gliederung wird jede der mehr als 100 Untersuchungsmethoden in einem eigenen Geräteblatt beschrieben. Hinzu kommen Querverweise zu alternativen Prüfmethoden sowie zahlreiche Hinweise auf einschlägige Fachliteratur und zu bekannt gewordenen Geräteherstellern, Lieferanten und Dienstleistern.
Pile testing as a NDT-CE (non-destructive-testing in civil engineering) method provides information about the condition of foundations. It is also used as a tool for quality control. Real size test fields with sound piles, piles with flaws and piles connected with a foundation allow calibration of measurement devices and method comparison under "real" conditions. Such a site is planned on a BAM testing area south of Berlin. The joint use facilitates the establishment of the testing site as a national or European reference site.
RUFUS - Re-Use of Foundations on Urban Sites - Ein EU-Projekt zur Wiedernutzung von Fundamenten
(2003)
During the re-use process of existing concrete memebers like foundations information about geometry and location of piles or strip foundation is necessary. Ultrasonic echo with a need of only one-sided access may provide this information and help the engineer to assess foundations. Cost effectiveness by the re-use of foundations gains an increasing economic role due to decreasing average economic lifetime of buildings on urban sites. Results of systematic ultrasonic echo investigations at a slab from 75 cm to 125 cm thickness with ten different reinforcement ratios are presented. The influence of the varying reinforcement ratio and thickness on the reliability of the results is shown. Available data-processing algorithms based on reconstruction calculation and imaging of results to reveal the geometry of a slab and the location of piles or strip foundations are introduced. Practical guidance for the application of ultrasonic echo and its limits are presented to ensure reliable results.
NDT investigation methods
(2006)
The re-use of foundations on urban sites contributes to the Sustainable Development in construction. Investigations at potential parts to be re-used should be performed in time to influence the planning process. Non-destructive testing methods in civil engineering (NDT-CE) provide necessary information about location, dimension and condition of existing foundations. Thickness measurement of foundation slabs, imaging of their geometry is dealt with as well as localisation of voids and reinforcement beyond surface-near layers. For pile foundations this article introduces NDT-CE methods to measure the pile length or deviation of an expected length as well as to determine the pile integrity. Practical examples of typical testing problems are given and show the possibilities as well as limits of a method. This guidance enables the planning engineer to consider the use of NDT-CE methods and to assure their successful application.