关键词: 拟凝聚力, 稳定分析, 袋装砂围堤, 长江口

Abstract:

To obtain more convenient and practical stability analysis method for geotextile bagged-sand dike, we analyze the reinforcement mechanism of geotextile bagged-sand dike according to several dike projects in Yangtze River estuary, and the disadvantages of conventional stability analysis method for bagged-sand dike are pointed out, and the formula of quasi-cohesive force of bagged-sand dike is deduced theoretically. The examples show that the stability analysis of bagged-sand dike using quasi-cohesive force takes account the beneficial effects of reinforcement of geotextile and the defects that the limit equilibrium method could not consider influence from geotextile deformation on stability analysis. The presented method has valuable meanings to stability analysis of bagged-sand dike on soft foundation.

Key words: quasi-cohesive force, stability analysis, bagged-sand dike, Yangtze River estuary