Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
An investigation of the effect of under-ballast reinforcing geogrids in laboratory and operating conditions
This article presents the results of research focused on the use of reinforcing geosynthetics inserted directly under the ballast. This technology appears to be a beneficial, cost-effective solution in cases of need for enhancing the bearing capacity of existing railway tracks with poorer track bed quality. Model constructions in a 1 to 1 scale with reinforcing geogrids of three types inserted under the ballast were investigated in laboratory conditions under short-term static loading and long-term cyclic loading. The contribution of geosynthetics is evaluated by comparing the values of settlement and bearing capacity of individual layers with those of a non-reinforced construction. The article also describes the up-to-date experience in the verification of the geo-composite-reinforced ballast bed in operating conditions. It is performed on a trial section of a single-rail track 200 m in length characterised by persisting long-term problems with the track geometry. The authors evaluate the used technology of mechanical geosynthetic laying by means of the ballast cleaning machine.
An investigation of the effect of under-ballast reinforcing geogrids in laboratory and operating conditions
This article presents the results of research focused on the use of reinforcing geosynthetics inserted directly under the ballast. This technology appears to be a beneficial, cost-effective solution in cases of need for enhancing the bearing capacity of existing railway tracks with poorer track bed quality. Model constructions in a 1 to 1 scale with reinforcing geogrids of three types inserted under the ballast were investigated in laboratory conditions under short-term static loading and long-term cyclic loading. The contribution of geosynthetics is evaluated by comparing the values of settlement and bearing capacity of individual layers with those of a non-reinforced construction. The article also describes the up-to-date experience in the verification of the geo-composite-reinforced ballast bed in operating conditions. It is performed on a trial section of a single-rail track 200 m in length characterised by persisting long-term problems with the track geometry. The authors evaluate the used technology of mechanical geosynthetic laying by means of the ballast cleaning machine.
An investigation of the effect of under-ballast reinforcing geogrids in laboratory and operating conditions
Hornicek, L. (Autor:in) / Tyc, P. (Autor:in) / Lidmila, M. (Autor:in) / Krejcirikova, H. (Autor:in) / Jasansky, P. (Autor:in) / Brestovsky, P. (Autor:in)
2010
9 Seiten, 7 Bilder, 4 Tabellen, 13 Quellen
Aufsatz (Zeitschrift)
Englisch
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