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Soil cement is a construction material with significant potential for widespread application in water resource management, particularly in providing overtopping protection for levees. However, the requirement for base soil to have a specific particle composition-predominantly coarse particles with minimal fine particles-limits its broader practical use. This study focuses on clarifying the erosion resistance of soil-cement material manufactured from clayey silt (ML) soil, a type of soil that does not meet the Portland Cement Association's requirements for mixing with fly ash and cement. Hydraulic model experiments were conducted to assess the erosion resistance of this soil-cement material under overflow conditions. Remarkably, the results showed high erosion resistance, withstanding flow velocities exceeding 6.15 m/s with minimal erosion damage. This level of performance suggests that the ML soil-fly ash-cement solution is well-suited for protecting levees up to 4 m in height during overtopping events. Specifically, for levees with a height of 3 m and slope coefficients of m = 2 and m = 3, the permissible overflow depths are 0.4 m and 0.5 m, respectively. For 4 m-high levees with the same slope coefficients, the permissible overflow depths are 0.3 m and 0.4 m, respectively. Elucidating the erosion resistance of soil cement made from ML soil is expected to promote the application of this material for levee protection during overtopping scenarios.

来源平台：GEOTECHNICAL AND GEOLOGICAL ENGINEERING