Shear and filtration strength of foundation of channel type hydropower plant building

The purpose of the study was to analyze foundation's filtration strength and HPP building's shear stability after 38 years operation as part Tuyamuyun hydroelectric complex on Amudarya River. analysis carried out based field data obtained with help 16 piezometers installed in two alignments within block building vertical drainages grassland. constructed graphs water pressure fluctuations coincide nature change level upper lower pools. actual gradients did not exceed allowable gradient for shaly sand interlayer limestone bedding fracture filler. Comparison maximum natural those calculated from model studies using electrohydrodynamic analogies. is estimated by piezometric compared analytical calculations, safety factor 2.303. In this way, base's structure's are ensured entire range changes operating mode front block.