FLUME EXPERIMENT AND NUMERICAL ANALYSIS FOR BANK REINFORCEMENT WITH GEOCONTAINER

摘要

In China, dumped riprap is used for emergency elimination of bank collapse in large rivers. However,the riprap collapses due to washing and scouring in flood period. Geocontainer is applied to sustain river bank stable for a long time. In order to use geocontainer for practical emergency elimination of bank collapse, model experiment and numerical analysis about geocontainer are performed. The geometrical scale of model is 1:60. The formulae of sinking trace of the geocontainer have been deduced according to test data and it can be used to guide construction. The analysis software FLAC3D is used to analyze the stability effect of the geocontainer sustaining river bank under four water levels at Mahu dike in Yangtze river which collapsed in 1996. The result shows that the bank loses its stability under the fourth condition without sustained geocontainers and the bank stability can be kept with sustained geocontainers under the same condition.