The paper deals with the time-dependent behaviour of retaining walls reinforced with polypropylene geogrids and subjected to increasing loads applied to the soil surface behind the wall. The experimental program involved fully automatic small-scale 1g physical models of a geogrid-reinforced wall. Long term model tests were carried out using different plate loading rates in order to investigate the time-dependent response of the reinforced walls. The paper presents details of the physical model, testing procedure and principal test results. An analytical interpretation of the time-dependent viscoplastic behaviour using a simple three parameter time-rate equation is shown to fit the experimental data and is then proposed to predict the long term displacements of the reinforced walls.
The viscoplastic behaviour of a geogrid-reinforced modell wall
SIMONINI, PAOLO;
2003
Abstract
The paper deals with the time-dependent behaviour of retaining walls reinforced with polypropylene geogrids and subjected to increasing loads applied to the soil surface behind the wall. The experimental program involved fully automatic small-scale 1g physical models of a geogrid-reinforced wall. Long term model tests were carried out using different plate loading rates in order to investigate the time-dependent response of the reinforced walls. The paper presents details of the physical model, testing procedure and principal test results. An analytical interpretation of the time-dependent viscoplastic behaviour using a simple three parameter time-rate equation is shown to fit the experimental data and is then proposed to predict the long term displacements of the reinforced walls.
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