SU755955A1 - Foundation for walls or columns of buildings - Google Patents

Description

The invention relates to the field of construction, namely, to prefabricated foundations on a natural basis under the walls or columns of buildings and structures.

Known solid monolithic reinforced concrete foundation in the form of a slab, laid under the entire area of the building, through which the load is transferred to the natural base [13 - ·.

The disadvantage of these foundations is their non-industrial nature, dependence of implementation on weather conditions, high consumption of concrete. 15"

The closest technical solution to this invention is the foundation under the walls or columns of buildings, structures, including prefabricated 20 located on the ground

reinforced concrete elements, interconnected by welding reinforcement outlets or compressing these elements with special reinforcement beams, passed through 25 special holes in the elements, followed by cementing joints [2].

The disadvantage of these foundations is the need to use arg 30

2

Maths, either ordinary or prestressed, high metal consumption for anchoring of reinforcement, the need to protect the joint fittings from the effects of groundwater. . .

The purpose of this invention is to reduce the consumption of materials and simplify installation.

This goal is achieved by the fact that in a known foundation under the walls or columns of buildings, structures, including prefabricated reinforced concrete elements placed on the base, the seams between which are monolithic, each prefab element is made of trapezoidal cross-section, and the seams between the prefabricated elements are homogenized with concrete on self-expanding cement. In this case, precast concrete elements can be laid, on the foundation with smaller bases, as well as alternating alternately larger and smaller bases, and to ensure uniform transfer of force, the foundation can be equipped with a support belt located on the upper surface of the precast concrete elements constructions.

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755955

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FIG. 1 shows a view of the foundation in plan; in fig. 2 is a section A-A of FIG. one; in fig. 3 is a section BB of FIG. one; in fig. 4 - an embodiment of the foundation (the elements are alternately turned 180 вокруг around the horizontal axis), plan; in fig. 5 is a sectional view BB of FIG. four.

The described foundation for walls or columns of buildings, structures includes prefabricated reinforced concrete elements of trapezoidal section 1, placed with bandaging of end seams 2. Seams are monolithic with concrete on expanding cement.

The length of each element 1 is installed walls 3, columns 4 can also be supported on the elements.

Walls or columns can be supported on the elements directly or through the support belt 5.

An embodiment of the slab with the arrangement of trapezoidal elements with a large and smaller base upwards (or with alternating turning of the elements by 180 ° around the horizontal axis), shown in FIG. 2, it is advisable to carry out in the case of large spans and relatively small sizes of prefabricated elements.

In this case, those elements whose large bases of the trapezium are at the top are located directly under the walls or pillars of the building, and the neighboring elements are located in the span.

In this case, repulsing the ground, acting on the inter-span element, causes it to wedge between adjacent elements, and the resulting tensile stresses are extinguished by compressive stresses from the self-compressing cement.

To ensure better adhesion of self-stressed concrete with prefabricated elements on the lateral surfaces of the latter, various projections and depressions can be made, forming keys.

The dimensions of the prefabricated elements are chosen on the conditions of the location of the joints between the elements in the quarters of the spans between the supporting walls or columns. This leads to a decrease in the width of the opening of cracks in the joints (or their complete absence), since the joints are located in areas with minimum or zero moments.

As a result of the connection of elements by seams between each other, with a concrete grouted

on expanding cement, each longitudinal strip of the slab is able to work as a multi-span continuous system, and the location of the monolithic gaps in the quarters of the spans eliminates the need for connecting reinforcement.

The use of the foundation of the described construction reduces the consumption of concrete through the use of modern methods of compacting concrete in factories and obtaining higher grades of concrete than on the construction site, speed of production of the foundation, since installation of a house can be started immediately after the blocks are laid before the joints are built, and concrete is reduced warmed up in winter.

Claims (4)

Claim 1. The foundation for walls or columns of buildings, structures, including prefabricated reinforced concrete elements placed on the base, the seams between which are monolithic, characterized in that, in order to reduce material consumption and ease of installation, each prefab element is made of trapezoidal cross-section, and the seams between the prefabricated elements monolithic concrete on self-expanding cement. 2. The foundation for walls or columns of buildings, structures according to claim 1, characterized in that the precast concrete elements laid on the base of smaller bases. 3. The foundation according to claim 1, characterized in that the prefabricated elements laid on the base alternating alternately large and. smaller grounds. 4. The foundation of PP.1, 2, 3, characterized in that, in order to ensure uniform transfer of forces, it is equipped with a support belt located on the upper surface of the precast concrete elements under the walls or columns of buildings and structures.