Analysis for Reliability of Groyne Safety during Random Erosion Process

This paper presents the mechanism of erosion scour in groyne of levee projects and a probability method of the reliability analysis for groyne erosion process under affects of random factors. The safety (stability) criterion of groyne erosion due to flow scour has been taken into account for that the equivalent gradient of the back-slope of the eroded pit near the head of the groyne should be less than that of a critical value of J_D, which is related with the rest angle of the scoured out silt under water. In computational analysis, most important design factors have been taken into account for the correlated or in- depended random parameters in the reliability analysis. The developed analysis could provide an advanced basis on the reliability evaluation and design for groynes of levee projects.