RU2552280C2 - Prefabricated foundation shell - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: prefabricated foundation shell includes an external shell with an expansion in a lower part, resting against a board or a prepared foundation. The shell comprises flat trapezoidal boards installed vertically, as inclined with equal angles of boards inclination, and with the largest angle of boards inclination, which are opposite to direction of action of highest moment forces, or from jointly installed vertical and inclined boards. The inclined board is made at the opposite side of directing actions of highest moment forces and is parallel to the side of the support board. The joint of mutually crossing trapezoidal boards is made via vertical or inclined as arranged symmetrically to a slot in upper and lower parts of the boards by half of their height. All opposite composite trapezoidal boards have smaller size. In the upper part of the foundation a column base is made as through under single or double branch column.

EFFECT: increased bearing capacity, reduced labour intensiveness and material intensity.

2 cl, 8 dwg

Description

The invention relates to the construction, in particular, to the construction of prefabricated foundations, shells of industrial and civil buildings.

Known prefabricated foundation of the glass type, under the multi-branch column, made of two types of flat plates mutually intersecting at right angles, mounted vertically and having cuts along the axes of the branches of the columns [1].

The construction of the foundation has insufficient bearing capacity and complexity in the manufacture of composite elements, a large material consumption.

The closest technical solution to the proposed foundation is the foundation, including the outer shell with the filling material of different strengths placed in it in the horizontal and vertical directions [2].

The disadvantage is the complexity of manufacturing the foundation, insufficient bearing capacity.

The purpose of the invention: increasing the bearing capacity, reducing the complexity of manufacturing structural elements, reducing the time of installation work and reducing material consumption.

This goal is achieved in that a prefabricated foundation-shell, including an outer shell with broadening in the lower part, supported on a plate or prepared base and with vertical and horizontal layers of material of different volume weight placed in it, the side opposite to the direction of action of the largest moment efforts, the foundation shell consists of flat trapezoidal plates installed vertically, obliquely with equal slope angles, and with the greatest slope angle, prot and the direction of action of the greatest moment forces, or from jointly installed vertical and inclined plates, while the inclined plate is made on the opposite side of the direction of action of the greatest moment forces and is parallel to the side of the base plate. The joint of mutually intersecting trapezoidal slabs is made through vertical or inclined slots symmetrically located in the upper and lower parts of the slabs at half their height, while all overlying composite trapezoidal slabs are smaller in size, and in the upper part of the foundation the columnar is made through for one- or two-branch columns.

Figure 1 shows a prefabricated foundation shell with inclined plates, a top view of a single-branch column; figure 2 is a vertical section of the foundation DD; figure 3 - plate element with lower vertical grooves; figure 4 - plate element with upper vertical grooves; figure 5 - plate element with lower inclined grooves; figure 6 - plate element with upper inclined grooves; Fig.7 shows a prefabricated foundation shell, a top view of a two-branch column; in Fig.8 is a vertical section of the foundation EE;

The prefabricated foundation shell includes a base plate 1, trapezoidal plates 2 and 3 with lower slots 4 and with upper slots 5, filling material with a large bulk density of 6 and less weight 7.

The technology for the installation of the foundation is carried out in the following sequence.

A prefabricated reinforced concrete foundation plate 1 is mounted on the prepared base in a known manner, trapezoidal elements are mounted on it with a crane, plates 3 with a slot 5 are installed parallel to each other, then trapezoidal plates 2 with slots 4 are mounted perpendicular to them in a slot 5. The installation of subsequent trapezoidal plates is similar . Then the inner part of the shell is filled with material in vertical layers of different weights.

The proposed foundation design allows to reduce the complexity of manufacturing, significantly reduce installation time, reduce material consumption, increase the bearing capacity of the foundation.

Information sources

1. USSR Copyright Certificate No. 140751, cl. 84 s, 2, 1961.

2. Patent RU No. 2367743, cl. E02D, 2007.

Claims (2)

1. A prefabricated foundation-shell, including an outer shell with broadening in the lower part, supported on a plate or prepared base, characterized in that the shell consists of flat trapezoidal plates installed vertically, obliquely with equal angles of inclination of the plates, and with the largest angle of inclination plates opposite the direction of action of the greatest moment forces, or from jointly installed vertical and inclined plates, while the inclined plate is made on the opposite side of the direction of action of the greatest moment forces and is parallel to the side of the base plate, and the joint of mutually intersecting trapezoidal plates is made through vertical or inclined symmetrically arranged slots in the upper and lower parts of the plates at half their height, while all overlying composite trapezoidal plates are smaller in size, and in the upper part of the foundation made through for one- or two-branch column. 2. The prefabricated foundation-shell according to claim 1, characterized in that the material of different volumetric weight placed therein in vertical and horizontal layers, the side opposite to the direction of action of the greatest moment forces has the greatest weight.

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