EN KHRUSTALEV METHOD OF PREVENTING ACCIDENT RISK OF HYDRAULIC POWER PLANT AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2016 - IPC E02B9/00 E02B7/12 

FIELD: construction.

SUBSTANCE: according to the disclosed method, monolithic reinforced concrete body gravity dam with height H₀ (cm) is made convex towards reservoir in the form of riverbed compass roof. Dam body height H₀ is designed and made in the longitudinal horizontal sections with radius R (m). Concrete dam body is reinforced with metal steel rods, which are welded as spatial array. Dam body is equipped with operational drain water lines with height H_IN (cm) of the upper water pond in the reservoir up to the height H_H (cm) of the lower pond. Turbines of electric current generator are set at H_G water level in the river behind the dam body in its discharge channel. At the input operating spillway is equipped with movable hydraulic gates. Stator of electric current generator is solidified in the seat of the dam body, and generator rotor is fixed in the stator through the cover by means of threaded connection of bolts and nuts. Horizontal angle of arched dam body contact at the level of the upper pond H_IN of water in the reservoir is accepted based on model tests as equal to Angle of arch dam body contact in longitudinal horizontal sections with water from reservoir is maintained constant - const throughout the height H₀ of the dam body, and the radius of the dam arch body on the side of reservoir are accepted as variable and equal - varir, where - distance between coasts in longitudinal vertical section along the height H₀ of the dam body filled with water, - internal friction angle of water. Threaded connection of rotor cover with stator bowl of the current generator and monolithic attachment of the stator bowl in the dam body are calculated for pull force N_max, which is calculated by formula. Contact angle of the arch dam foundation bed with underlying base material in transverse and, if possible, in longitudinal vertical sections is kept as permanent - const, where - internal friction angle of the base material. At uniform distribution of contact stresses on lateral sides of the dam body in contact with water reservoir and air atmosphere receiving submersion depth h of the dam body without gravity side crack formation from the upper pond H_W of water in the reservoir is equal to $$h_W\ge p_W^{cr.}/{\gamma }_B$$ (cm), where (kg/cm²)-maximum critical breaking concrete dam body pressure, which is calculated by formula, and without gravity crack formation from upper edge of the dam body on the opposite side of the dam body from the reservoir-at the depth of $$h_{Н}\ge p_W^{cr.}/\left({\gamma }_B+{\gamma }_W\right)$$ (cm) , where γ_W= 0.001 (kg/cm³)-specific weight of water, and condition of absence of surface crack formation on the dam body at depth h > h_W and h > h_H respectively on the side of reservoir and on the back side of the dam body receiving dependence (kg/cm²)-, where [σ_T]_ST -tolerable yield stress upon expansion of metal fittings for which the dam concrete body is preliminary reinforced with strained steel rods.

EFFECT: disclosed method and produced in the process of its implementation device prevent accident risk of hydraulic power plant during water discharge in reservoir by preventing surface and subsurface formation of cracks.

2 cl, 6 dwg