PRECAST PAVEMENT SLAB Russian patent published in 1994 - IPC

FIELD: civil engineering. SUBSTANCE: precast pavement slab uses a load-carrying polygonal structure consisting of members interconnected by adjoining vertical planes, and the lateral faces of one member are formed by adjoining vertical planes, and the lateral faces of the other member are made with alternating projections and cavities, whose lateral sides are directed at an acute angle towards the vertical plane of the lateral face of one member. The slab is provided with an additional member, whose lateral faces are formed by alternating projections and cavities shifted in the horizontal plane relative to the projections and cavities of the lateral faces of the other member; part of the slab, whose lateral faces are formed by the adjoining vertical planes, extends in the bottom part of the slab, and the angle between the lateral sides of the projections and cavities of each member and the vertical plane of the face of the bottom part is more than 0C and less than a half of the angle between the adjoining planes of the faces of the bottom part. The lateral face with alternating projections and cavities has in each member an equal number of projections and cavities has in each member an equal number of projections and cavities, whose shape in the respective slab member is the same. EFFECT: enhanced strength and durability of butt joint and load-carrying capacity of precast pavement on non-reinforced foundations. 4 cl, 12 dwg