Analysis of Soil Susceptibility to Internal Suffusion in Selected Sites for Impoundment Objects

World Multidisciplinary Earth Sciences Symposium

Skvarka, Juraj^1 ; Bednarova, Emilia^1 ; Slavik, Ivan^1

Department of Geotechnics, Faculty of Civil Engineering, Slovak University of Technology, Radlinského 11, Bratislava

813 68, Slovakia^1

关键词: Analysis of soils;    Filtration stability;    Geological environment;    Hydrodynamic forces;    Hydropower potential;    Reliability problems;    Small hydro-power plants;    Survey and analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/221/1/012011/pdf
DOI  :  10.1088/1755-1315/221/1/012011

来源: IOP

【 摘 要 】

In recent years, in Slovakia the construction of hydraulic structures focused on impoundment objects, which role is to utilize hydropower potential of watercourses by small hydropower plants. Construction and operation of the hydraulic structure requires to deal with issues connected with flow of seeping water and groundwater. One of the safety and reliability problems of hydraulic structures is to ensure the filtration stability of the geological environment. The most common problem with these structures is internal suffusion. Internal suffusion is defined as the transport of fine particles of soils in the porous environment due to hydrodynamic forces of seeping water. These processes can endanger the stability and serviceability of earth structures and solid structures of impoundment objects. A sufficient level of safety against internal suffusion can by ensured only by geological survey and analysis of the mechanical properties of the soils. Proposed paper is focused on internal suffusion. In our paper we analysed the geometric criteria of filtration stability for gravel soils for selected hydraulic structures according to the latest knowledge. By comparing several criteria and several samples of gravel soils with different mechanical properties we derived dependencies related to the filtration stability of gravel soils.