Overturning stability of supported geomembrane tube for flood control

As a kind of rapid filling hydraulic structure, geomembrane tube can effectively act as flood barriers and cofferdams for risk management. L-shaped block is used to support prevent it from rolling. The contact force between the analyzed by using particle flow code (PFC 2D ) software, overturning stability calculated. relationship key factors was established. It found that central angle has little influence on stability. decreases with increase initial pumping pressure. Keeping L w /L b unchanged, increasing Lb will improve where Lw are width height Lshaped block. Under ultimate water level, when 1.23 Lbcr < ≤1.55 bcr , in state critical pressure less than 0.152γL, =1.0 cross-sectional perimeter γ unit weight liquid, contrary, must be greater 1 ensure its