FOUNDATION FOR UNIQUE STRUCTURES AND METHOD OF ITS CONSTRUCTION

construction engineering, particularly, construction of slab monolithic foundations for unique structures of large areas. SUBSTANCE: novelty in foundation consists in that slab is made in form of butt-joined blocks of monolithic concrete of class not below B 40, water-proofness grade W 12 and heat release not above 20000 kcal/cu.m, from mix with mobility of 18-24 cm. Slab is reinforced with upper, lower and middle tiers of reinforcing fabrics, distance between neighboring joints of fabric bars is not less than 1.5 lengths of lap joint. Distance between fabric bars joint and process joint of concrete blocks is not less than length of lap joint of bars. Novelty of offered method consists in that laid on base, first, are reinforcement bars in two mutually perpendicular directions, reticular forms are mounted for concrete blocks, reticules are formed for lower, middle and upper tiers and fastened with help of vertical frames. Then, concrete mix with mobility of 18-24 cm are laid into forms. Concrete mix contains, wt.%: cement 12.5-14.5; filler 70.5-58.5; modifier based on microsilica, fly ash, plasticizer and setting regulator 0.5-2.0; the balance, water. EFFECT: simplified construction of monolithic massive foundation, excluded formation of temperature joints due to selected optimal reinforcement and concrete mix composition for continuous technology of monolithic concreting of concrete block in volume of 1800 cu.m. 2 cl, 4 dwg