Purpose: to determine the roughness coefficient of the protective coating of a watercourse bed, consisting of geomat – Enkamat grade 7225 with crushed stone filler with a particle size of 6 to 10 mm.
Materials and methods. Hydraulic structures are susceptible to water erosion, so the formation of protective coatings for their slopes is currently relevant. To prevent the negative effects of water erosion on soil slopes, a number of measures are carried out, including reinforcement of the upper layer of the slope with anti-erosion clothing. Currently, there is a large number of erosion-protective cloths but with the development of technology modern geosynthetic materials have appeared. The features of a model installation for determining the hydraulic characteristics of an anti-erosion coating are discussed and the methodology for their determination is described. The feasibility of using geomat – Enkamat grade 7225 with crushed stone filler as an anti-erosion agent for reinforcement of the hydraulic structure slopes are discussed in the article.
Results. The calculation formulas on the basis of which the values of the roughness coefficients were experimentally obtained were analyzed. The results of experimental studies aimed at determining the roughness coefficient of the protective coating at different flow rates and flume bottom slopes are presented. An analysis of the obtained results was performed and the average value of the roughness coefficient was derived.
Conclusions. Laboratory studies conducted to assess the roughness coefficient for an erosion protective coating made of geomat filled with crushed stone showed the possibility of using innovative reinforcement in practice. Recommendations for the use of protective anti-erosion coating are given.
doi: 10.31774/2712-9357-2024-14-2-260-274
anti-erosion coating, bank reinforcement, geomat, crushed stone, water erosion, canal
Zhukova T. Yu., Khanov N. V., Сhernykh О. N., Rednikov S. N. Experimental studies of the roughness coefficient of a composite geomat coating filled with crushed stone. Land Reclamation and Hydraulic Engineering. 2024;14(2):260–274. (In Russ.). https://doi.org/10.31774/2712-9357-2024-14-2-260-274.
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