STUDY ON THE EXPERIMENT OF STABILITY OF UNARMORED FLAT GEOTUBE DIKE UNDER WAVE ACTION

摘要

To study the stability of unarmored flat geotube dike subject to wave action, large scale model test has been performed. In the test, the archetypal geotube dikes with top width of 5.25 m, heights of 4.2 m, 6.3 m, 8.4 m, and slope ratios of 1.25, 1.5, 2.0, 2.5 were employed. The results of the test demonstrated that the stability of flat geotube dike under wave action decreases with the flatter wave increasing, while it decreases in the beginning and then increases with the slope ratio increasing. Empirical formula of safety factor was founded and compared by the results of critical wave heights obtained in the test.