RU2004138978A - DEFORMATION SEAM OF ANTI-FILTRATION FACING OF CHANNELS AND RESERVOIRS (OPTIONS) - Google Patents

Claims (7)

1. The expansion joint is an antifiltration lining of canals and ponds made of concrete and reinforced concrete slabs, including a pore-insulating gasket, a polymer sealing mastic and an anti-adhesive layer, characterized in that a waterproofing gasket 100 ... 500 mm wide is made on the lower surface of the mating plates, sealed with a compensator in the form of a freely deformable fold. 2. The seam according to claim 1, characterized in that the dimensions of the expansion joint are established from the following relationships

where _W - the width of the expansion joint, mm; Δh is the maximum height shift of one cladding plate relative to another, mm; α is the coefficient of linear expansion of concrete, deg ^-1 ; L is the distance between the expansion joints, mm; t _max - maximum air temperature during operation of the impervious lining, ° C; t _min - the minimum air temperature in winter, ° С; ε is the elongation at break of the samples of the polymer sealing mastic, aged in air,%; k is a coefficient that takes into account the decrease in the deformability of the polymer sealing mastic as a result of external influences and prolonged voltage (for thiocol mastics, k = 0.25); [δ] is the minimum width of the seam at which the polymer sealing mastic retains elastic properties, mm; δ ^* is the minimum thickness of the polymer sealing mastic in the weld design, mm; δ is the maximum thickness of the polymer sealing mastic by contact with the end faces of the joined plates in the weld structure, mm; β is the angle of inclination of the end faces of the plates to their front surfaces, degrees; σ _a - the adhesive strength of the polymer sealing mastic to concrete, kg / cm ² ; σ _k - the value of the cohesive strength of the polymer sealing mastic, kg / cm ² . 3. The expansion joint of the anti-filtration lining of channels and ponds made of concrete and reinforced concrete slabs, including a pore-insulating gasket, a bitumen-polymer sealing mastic, laid in the weld cavity with the shoulder device on the top of the joined plates, and an anti-adhesive layer, characterized in that on the lower surface of joined plates, a waterproofing strip 100 ... 500 mm wide is made hermetically glued, made with a compensator in the form of a freely deformable fold, and the dimensions of the seam are determined from the following property

where _W - the width of the expansion joint, mm; Δh is the maximum height shift of one cladding plate relative to another, mm; α is the coefficient of linear expansion of concrete, deg ^-1 ; L is the distance between the expansion joints, mm; t _max - maximum air temperature during operation of the impervious lining, ° C; t _min - the minimum air temperature in winter, ° С; ε ₁ - the average value of the relative elongation of the bitumen-polymer sealing mastic at break in the range of operating temperatures from t _max to t _min ,% ε ₂ is the average value of the relative elongation of the bitumen-polymer mastic in the temperature range at which uneven base deformations occur: frosty swelling from 0 to t _min ° C, subsidence and swelling from 0 to t _max ° C,%; k ₁ - coefficient of fatigue of the seam filling material, taking into account the reduction in the deformability of the bitumen-polymer sealing mastic during long-term operation in the range of operating temperatures from t _max to t _min , k ₁ = 0.6; k ₂ is the fatigue coefficient of the weld filling material, taking into account the decrease in the deformability of the bitumen-polymer sealing mastic as a result of prolonged work in the field of positive or negative temperatures, k ₂ = 0.4 ... 0.7; [δ] is the minimum width of the seam at which the bitumen-polymer sealing mastic retains elastic properties, mm δ ^* is the minimum thickness of the bitumen-polymer sealing mastic in the weld design, mm; δ is the maximum thickness of the polymer sealing mastic by contact with the end faces of the joined plates in the weld structure, mm; β is the angle of inclination of the end faces of the plates to their front surfaces, degrees; σ _a - the adhesive strength of the bitumen-polymer sealing mastic, kg / cm ² ; σ _k - the value of the cohesive strength of the bitumen-polymer sealing mastic, kg / cm ² ; Δ is the thickness of the shoulders made of bitumen-polymer mastic on abutting plates, mm. 4. The seam according to claims 1 to 3, characterized in that the maximum thickness of the sealant (polymer or bitumen-polymer mastic) in the design of the seam is established from the following relationship

where δ ^* is the maximum thickness of the sealant (polymer or bitumen-polymer mastic) at the contact with the end faces of the joined plates in the weld structure, mm; m is the coefficient of the seam working conditions, m = 1.3; k ^* is the coefficient of dimension, k ^* = 49; γ is the density of water, g / cm ³ ; N - channel filling, m; _W - the width of the seam, mm; σ _a is the adhesive strength of the sealant (polymer or bitumen-polymer mastic), kPa. 5. The seam according to claims 1 and 3, characterized in that the cavity of the compensator, made in the form of a freely deformable fold, is filled with plastic, hydrophobic and frost-resistant lubricant. 6. A seam according to claims 1 and 3, characterized in that the waterproofing gasket is glued to the end faces of the joined plates in the seam structure. 7. The seam according to claim 3, characterized in that the width of the shoulders of the bitumen-polymer sealing mastic on the joined plates is 30 ... 50 mm.