SPH Modeling of Surge Overflow over RCC Strengthened Levee

Abstract

Surge overflow may cause damage on earthen levees. Levee strengthened on the levee crest and landward-side slope can provide protection against the erosion damage induced by surge overflow. In this paper, surge overflow of a roller compacted concrete RCC strengthened levee was studied in a purely Lagrangian and meshless approach, the smoothed particle hydrodynamics (SPH) method. After verifying the developed model with analytical solution and comparing the results with full-scale experimental data, the roughness and erosion parameters were calibrated. The water thickness, flow velocity, and erosion depth at crest, landward-side slope and toe were calculated. The characteristics of flow hydraulics and erosion on the RCC strengthened levee are given. The results indicate that the RCC strengthened levee can resist erosion damage for a long period.

Experimental study on inner slope failure mechanism of seawall by coupling effect of storm surge and wave

“…explored erosion characteristics of the inner slope and proposed the formulas of mean overtopping discharge and mean overfl ow thickness respectively in the case of coupling between storm surges and waves. Many scholars have carried out in-depth studies on roller-compacted concrete (RCC), articulated concrete block (ACB) and high-performance turf reinforced mat (HPTRM) as well as other facings, these new armor blocks are more stable (Hughes, 2008;Li et al, 2012;Pan et al, 2013). However, most scholars carried out physical model tests on the damage of storm surge and wave coupling to seawalls without consideration of the dynamic water level change process of storm surges, which is very one-sided.…”