SU753993A1 - Continuous footing panel with recess open from above - Google Patents

Description

(54) BAND PLATE BASE

FIELD OF THE INVENTION The invention relates to construction and relates to the construction of strip foundations for industrial and civil buildings. Known monolithic foundation on the plate in the form of a solid block with a trapezoidal cross-section 1. Closest to the proposed is a slab basement plate, made with an open-top notch in its central part and transverse ribs adjacent to the central part and having a variable height, decreasing to the periphery 2. The drawback of these slabs is a large consumption of materials. The known foundations have a relatively large weight and cost, low carrying capacity. This is explained by the incomplete involvement of the soil in the joint work with the structure, which causes the concentration of pressure on the soil at the edges of the foundations with the appearance of deformations in these zones. The purpose of the invention is to reduce the material intensity of the base plate. The goal is achieved due to the fact that in the basement slab, made with a cutout open at the top in its central part and transverse: the ribs adjacent to the central part and having a variable height decreasing to the periphery, the cut is made for the entire length of the central part of the plate, Wrinkled pads can be placed in the neckline. FIG. 1 shows a slab strip foundation, a general view; in fig. 2 - the same plan; in fig. 3 is a section A-A in FIG. 2. The basement plate includes a central part 1 with an open-top notch 2 with a crushable gasket 3 in it. transverse ribs 4 adjoin the central part of the slab 1, having a variable height decreasing from the central part to the periphery. The crushable gasket 3 is made of wood or some kind of elastic-plastic material with a yield point exceeding the stress from temporary and standard loads, but lower than the calculated stresses. The width of the notch 2 should be 0.05-0.5 of the transverse size of the base walls 5. The depth and shape of the notch are determined from the strength and crack resistance conditions of the slab.

The load is transferred from the foundations. ment walls 5 on the central part of Plate 1,

The presence of a notch on top determines the nature of the slab operation in a weakened section, respectively, as a non-ideal two-sided or one-way hinge, which significantly relieves the central part of the slab during operation and reduces the cost of concrete and the consumption of working reinforcement in the lower zone.

Additional possibility of increase; the bearing capacity of the base, especially for weak and wrinkle soils, is provided by pressure control with a crushable gasket placed in the cut-out. The gasket also ensures reliable operation of precast slabs during transportation and installation.

Claims (1)

Invention Formula 1, The basement slab, made with an open top cut in its central part and transverse ribs, adjacent to to the central part and having a variable height, reduced to the periphery, characterized in that, in order to reduce material consumption due to the redistribution of forces in the slab, the cut is made to the entire length of the central part of the slab, 2, Plate pop, 1, characterized in that in the cut-out marked wrinkles. Sources of information taken into account in the examination 1, Grutman M, S, Prefabricated large-block foundations, Kiev, Gosizdat of literature on construction and architecture of the Ukrainian SSR, 1956, 75, 2, Grutman M, S, Prefabricated large-block foundations, Kiev, Gosizdat of literature on construction and architecture of the Ukrainian SSR, 1956, 40, BUT AJ