Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Evaluation of geotextiles' survivability by field tests
Proper functioning of a geotextile in separation and filtration function requests close contact to each of the adjacent soil layers without cavities. Theoretical studies and simple laboratory tests have shown, that stresses induced during the installation and the consequent access traffic phase will cause deformations of 30 - 50 % at the boundary surface of a geotextile in separation function. At two construction sites different geotextile types were installed at conditions representing unpaved access roads and were loaded for a selected period of the construction works. At test pits the geotextile surface was excavated and the real shape of the boundary surface measured with a laser-profilometer and samples of the geotextiles were taken for further testing in laboratory. At each test section profiles in length and cross direction were produced from the measured data and calculated values of elongation (in %, related to 20 mm distance) produced. The results show clearly, that peak deformation values appear randomly and are due to penetration of single stones. The results allow the conclusion, that the 'softer' a geotextile the more frequent bigger deformation will appear. The level of observed deformations confirm the assumption, that an initial deformation of epsilon > 20 % may be caused by the installation procedure and access traffic. A requirement assessed to a minimum deformation of epsilon > 45 % at maximum strength seems therefore justified.
Evaluation of geotextiles' survivability by field tests
Proper functioning of a geotextile in separation and filtration function requests close contact to each of the adjacent soil layers without cavities. Theoretical studies and simple laboratory tests have shown, that stresses induced during the installation and the consequent access traffic phase will cause deformations of 30 - 50 % at the boundary surface of a geotextile in separation function. At two construction sites different geotextile types were installed at conditions representing unpaved access roads and were loaded for a selected period of the construction works. At test pits the geotextile surface was excavated and the real shape of the boundary surface measured with a laser-profilometer and samples of the geotextiles were taken for further testing in laboratory. At each test section profiles in length and cross direction were produced from the measured data and calculated values of elongation (in %, related to 20 mm distance) produced. The results show clearly, that peak deformation values appear randomly and are due to penetration of single stones. The results allow the conclusion, that the 'softer' a geotextile the more frequent bigger deformation will appear. The level of observed deformations confirm the assumption, that an initial deformation of epsilon > 20 % may be caused by the installation procedure and access traffic. A requirement assessed to a minimum deformation of epsilon > 45 % at maximum strength seems therefore justified.
Evaluation of geotextiles' survivability by field tests
Bewertung des Funktionserhalts von Geotextilien durch Feldversuche
Rathmayer, H. (Autor:in)
2000
6 Seiten, 4 Bilder, 5 Tabellen, 2 Quellen
Aufsatz (Konferenz)
Englisch
EVALUATION OF GEOTEXTILES' SURVIVABILITY BY FIELD TESTS
| British Library Conference Proceedings | 2000
Performance and Survivability Evaluation of Geotextiles
| British Library Online Contents | 2001
Performance and Survivability Evaluation of Geotextiles
| British Library Conference Proceedings | 1991
Laboratory survivability of nonwoven geotextiles on open-graded crushed aggregate
| Tema Archiv | 1999
Survivability and Durability of Geotextiles Buried in Glenwood Canyon Wall
| British Library Online Contents | 1995