Russian Federation
Russian Federation
Russian Federation
625.1
628.2
Purpose: To develop a rockfill dam hydraulic calculation method based on the latest research on filtration erosion rate in coarse-grained materials at the contact with surrounding soils as well as the dependence of the geotextile filtration properties in the frozen state on its water loss coefficient. Methods: The erosion rate at the contact of coarse-grained materials with clay soils is proposed to be calculated by the formula developed at the Vedeneev All-Russia Institute of Hydraulic Engineering. The geotextile filtration properties in the frozen state have been tested using the water loss coefficient of these materials. Results: The proposed dependence for calculating the erosion rate of soils at the contact with coarse-grained materials has been obtained specifically for filtration facilities. It is not designed for open flows (in the updated VSN 61-89 Construction Norms, these recommendations remained unchanged); therefore, it provides more substantiated results taking into account soils and coarse-grained material properties. Since filtering embankments are built in the soils prone to climate-induced variability, the geotextile material separating layers should be calculated taking into account the water-loss coefficient that significantly affects their ability to filter, especially in their frozen state. Practical significance: The proposed method of hydraulic and filtration calculation of filtering embankments will allow designing more adequate protective measures for eliminating erosion.
Filtering embankments, hydraulic calculation of filtering embankments, protection against slope erosion, filtration properties of geotextiles in a frozen state, water-loss coefficient
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