Abstract
Measured settlements of buildings on the weathered Keuper Marl appeared to be much smaller than calculated settlements, which were based on stiffness modulus from standard oedometer tests. Therefore, both special triaxial K 0-tests and oedometer tests were carried out for an accurate determination of stiffness moduli. Modulus obtained in the triaxial K 0-tests were at least two to three times the values obtained in the oedometer tests. To verify observations from the laboratory tests, the loads and the settlements of two single footings on weathered Keuper mudstone have been measured during construction of a building over 1 year. Also, a large scale footing load test with measurements of deformations were conducted on the weathered Keuper mudstone. The measured settlements of the two single footings and the tested foundation were compared with the settlements based on conventional calculations with moduli from oedometer tests and triaxial K 0-tests. Up to a foundation pressure of σv = 500 kN/m² the calculated settlement based on E S-modulus obtained from triaxial K 0-tests was found to correspond well to the measured deformation. For foundation pressure beyond 500 kN/m², the foundation response was highly non-linear and it could not be described any more with the linear-elastic model. Therefore the footing load test was also simulated by FEM analyses.
Similar content being viewed by others
References
Clayton C (1989) The use of hall effect semiconductors in geotechnical instrumentation. ASTM Geotechnical Testing Journal 12(1):69–76
Hornig E-D (2000) Fundamentprobebelastung auf verwitterten Gipskeuperböden, Spezialsitzung „Forum für junge Geotechnik-Ingenieure“ 26. Baugrundtagung, Hannover, pp 60–61
Hornig E-D, Buchmaier RF, Schmidt H-H (2002) Eindimensionale Kompression überkonsolidierter bindiger Böden am Beispiel des Gipskeupers. Forschungsbericht, Fachhochschule Stuttgart—Hochschule für Technik
Illner C (1997) Verformungsverhalten von Gipskeuperböden. Forschungsbericht Fachhochschule Stuttgart. Hochschule für Technik, Labor für Geotechnik, unveröffentlicht
Maritn S (2001) Messung und Berechnung von Setzungen an Einzelfundamenten im Gipskeuper. Diplomarbeit, Institut für Geotechnik, Universität Stuttgart, unveröffentlicht
Menzies BK (1988) A computer controlled hydraulic triaxial testing system. ASTM STP 977:82–94
Schmidt H-H, Illner C (1998) Bestimmung von Verformungsmoduln an Gipskeuperproben. Tagungsband der 25. Baugrundtagung, Stuttgart
Schnürch R (1998) Experimentelle Ermittlung geotechnischer Kenngrößen für die Setzungsberechnung bei überkonsolidierten Böden am Beispiel des Gipskeupers. Diplomarbeit, Fachhochschule Stuttgart—Hochschule für Technik, unveröffentlicht
Vermeer PA, Brinkgreve RBJ (1998) PLAXIS Material Model Manual Version 7. A.A. Balkema, Rotterdam
Acknowledgments
The in situ measurements have been supported by: Hallesche Nationale Krankenversicherung Stuttgart Ed. Züblin AG—Niederlassung Stuttgart Terrasond Gesellschaft für Baugrunduntersuchungen mbH & Co. KG Dr. G. Hafner, Büro für Ingenieurgeologie, Erd- und Grundbau, Stuttgart FH Stuttgart—FB Vermessung und Geoinformatik. The large scale footing load test has been supported by: Daimler-Chrysler AG—Werk Sindelfingen Ed. Züblin AG—Niederlassung Stuttgart Bauer Spezialtiefbau GmbH Terrasond Gesellschaft für Baugrunduntersuchungen mbH & Co. KG Bauunternehmen Hämmerle GmbH & Co. KG FMPA Baden-Württemberg—Abteilung 4—Geotechnik Smoltczyk & Partner GmbH FH Stuttgart—FB Vermessung und Geoinformatik.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Hornig, ED. Field and Laboratory Tests Investigating Settlements of Foundations on Weathered Keuper Marl. Geotech Geol Eng 28, 233–240 (2010). https://doi.org/10.1007/s10706-009-9259-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10706-009-9259-y