Title: GEOTEXTILE-GRAVEL GEOGRID SYSTEM FOR REINFORCEMENT OF AN EMBANKMENT, ZBLEWO ROAD, POLAND
Abstract: This case history describes the 1987 construction of a 7m high road embankment near Zblewo in north Poland, in very difficult subsoil conditions. The embankment was based on a flexible slab, made of gravel wrapped in one layer of a thick needlepunched nonwoven geotextile, and placed over a layer of geogrid. The slab was 80m long and 30m to 45m wide. Adjacent strips of grid and geotextile were joined and fixed to the ground by metal pins. Although the geotextile had rather low tensile strength, it gave the cohesionless gravel layer some tensile strength, allowing a better distribution of the embankment's load on the weak subsoil. Construction began in October 1986 and ended in May 1987, with a break for frosty weather. The foundation soil's design parameters were determined by laboratory tests on samples taken from cased boreholes. The geotextile had nominal thickness 6.5mm, mass 400g/sqm, tensile strength 7-9kN/m, and 75-85% failure strain. Deformations of the foundation soil were monitored continuously, using a system of surveying points on the slab and in the surrounding area. The solution used had remarkable economical and technical benefits. For the covering abstract see IRRD 865821.
Publication Year: 1993
Publication Date: 1993-01-01
Language: en
Type: article
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