The Falling Process of Rubble Dumped by a Barge

A reliable prediction model of the deposition mound of rubble can be helpful in designing and calculating the cost of a structure. One of such models devides the gradual deposition of rubble in three stages. This study was focussed on the first stage in the dumping process, in which the deposition of rubble is described by a diffusion process. The cross-section of the resulting mound of rubble in this first stage of the dumping process is shaped like a two-dimensional Gaussian probability density function. The mathematical description of the first stage in the dumping process is called the Single Stone Model (SSM) and is given by: σG = C · squareroot of h · D_n50 The SSM assumes that the parameter c can be taken as a constant for a certain type of dumped material. However, from the analysis of prior experimental research, this assumption could be doubted. Therefore, two (new) series of model tests were carried out to verify the assumption in the SSM. For each series the dumped material was broken gravel. From the analysis of the results, it is concluded that for each series of experiments the value of the parameter c is indeed a constant. By means of a Student t-test it is concluded that both values of the parameter c could be taken equal to 0.685. Based on the new model tests it is concluded that the assumption in the SSM is very plausible. The value of the parameter c in the SSM can be considered as a constant for a certain type of dumped material.