Title: GEOTEXTILES IN REINFORCEMENT - A WELL-TESTED METHOD
Abstract: This paper describes the 'MS 13' reinforced wall, situated between Foix and Tarascon on the RN20 motorway in France, which is remarkable because of its exceptional size and the use of a specific geotextile which resists installation damage. Test results of the geotextile compare very well with those expected from traditional reinforcing techniques. The wall's design was based on the CARTAGE program and on the 'displacement method', which allows for the geotextile's deformability and considers elastoplastic behaviour at the soil-geotextile interface. The geotextiles used are nonwoven endless fibre fabrics, reinforced by a network of high modular polyester yarns. Each geotextile roll was given tensile strength tests and other tests. The embankment was constructed layer by layer with soil thickness 40cm. Due to the wall's exceptional character, instrumentation was used to monitor the work during and after installation. Two profiles were set up 15m away, in an area where the wall was highest. For each profile, the instrumentation consisted of: (1) a strain cell fixed on the geotextile; (2) four horizontal extensometers, combined with elongation cells; (3) apparatus to measure displacements; and (4) three vertical inclinometers. The elongation values for the profiles showed acceptable deformations.
Publication Year: 1996
Publication Date: 1996-11-01
Language: en
Type: article
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