RU2495204C1 - Flat cast-in-place and precast floor - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: floor comprises column sections of a floor cell made monolithic, and other sections are precast. Column-to-column sections are made of one or several central elements of rectangular shape, and the central section is made of one rectangular element or four and more triangular elements, at the same time all precast elements and sections of the floor cell are rigidly connected to each other.

EFFECT: floor strength improvement.

6 dwg

Description

The invention relates to bearing ceilings, fully or partially concreted at a construction site, composed of monolithic and prefabricated elements.

Known monolithic flat bezel-free non-dripping overlap, supported by columns (V. A. Klevtsov, AN Bolgov. - The actual operation of the nodes of a flat bezel-less non-dripping floor slab with columns during bursting. - Concrete and reinforced concrete, 2005, No. 3. - C. 17-19). The disadvantage of this overlap is the increased consumption of materials and the need to lay the entire volume of concrete floor at the construction site.

Known prefabricated monolithic flat bezel-free capless ceiling, composed of prefabricated slabs supported by columns (Pat. RF RU 2374401 C1, VP Zenin, MP Evglevsky, SV Tsykin. "Building". - Publ. November 27, 2008; patent for utility model RU 78501, V.N. Zenin, M.P. Evglevsky, S.V. Tsykin. "Bezelless building frame and column connection unit." - Publish. November 27, 2008.).

The disadvantage of these ceilings is the weakening of the knee plate by the hole along the axis of the column, that is, in a place where the forces reach the maximum value, which reduces the strength of the overlap, limits the load and the span, which does not exceed 6 m, that is, the overlap is not universal, has limited use. In addition, the joint of the columns in height is carried out using welding, which complicates the installation of structures.

The aim of the invention is to increase the strength and versatility of the overlap and reduce the consumption of materials.

This goal is achieved by the fact that the patellar overlap sections are made monolithic, and the annular and central overlap sections are made of prefabricated elements.

The essence of the invention lies in the fact that the patellar sections of the overlap cell are made in one piece and the remaining sections are prefabricated, with the intercolumn sections made of one or more precast rectangular elements, and the central section made of one rectangular element or of four or more triangular elements, this all prefabricated elements and sections of the cell overlap rigidly bonded to each other.

Figure 1 shows a diagram of the cell overlap span L up to 6 m, including patellar 1, intercolumn 2 and central 3 sections. In Fig.2 and 3 shows sections 1-1 and 2-2 in Fig.1. The supercolumn sections 1 of the overlap are made monolithic, and the intercolumnar 2 and central 3 sections are made of prefabricated elements. The dimensions of all sections in this case do not exceed 3 m; therefore, the intercolumn 2 and central 3 sections are prefabricated, which can be transported on railway platforms.

Figure 4 presents a diagram of the overlap cell with a span L of up to 12 m, in which the intercolumn 2 and central 3 sections of the overlap cell consist of several prefabricated elements, and Figs. 5 and 6 show sections 3-3 and 4-4 in Fig. 4 . In this case, the intercolumn sections 2 of the overlap cells consist of two rectangular elements 5, and the central section 3 consists of four elements of a triangular shape 6.

With an increase in the span of the overlapping cell, the number of prefabricated elements of the intercolumn 2 and central 3 sections will increase in order to ensure the transport dimension of the prefabricated elements. Thus, the span of the overlap cell is not limited.

Maximum efforts occur in the patella sections of the overlap cell and are significantly reduced in the remaining sections. In this regard, sections of the overlap cell can be made of variable thickness. In addition, the prefabricated elements of the overlap cell can be performed with voids, as shown in FIGS. 5 and 6. All this will significantly reduce the weight of the overlap and reduce the consumption of materials.

Figures 1 and 4 show diagrams of sections of a square overlap cell. Similar patterns of sections can be performed for overlapping cells of other shapes: rectangular, hexagonal and triangular. This further expands the scope of the proposed flat precast monolithic overlap.

The overlap is arranged as follows.

First, formwork is installed under the patellar sections 1 of the floor with a certain margin of size in the plan. On the formwork, prefabricated elements 5 of the intercolumn sections 2 are laid with the placement of the reinforcement outlets in the dimensions of the monolithic patched sections 1. Then the reinforcement is laid and the patellar sections 1 of the floor are concreted, the seams of monoling of the prefabricated elements 5 of the intercolumn sections of 2 overlapping cells are poured with concrete. Lastly, prefabricated elements 6 of the central section 3 of the overlapping cell are laid with support on the annular sections 2 and a temporary support in the center of the overlapping cell. The concrete joints of prefabricated elements 6 of the central section 3 of the overlapping cell are monolithic. When the monolithic concrete reaches sufficient strength, the formwork and temporary support are dismantled. Thus, the simplicity of the overlap device is ensured.

Overlapping works as follows.

The proposed flat prefabricated monolithic overlap in finished form is similar to monolithic, that is, it works flat, the same in all directions. Rigid fastening of the annular sections 2 in the monolithic patellar sections 1 creates a rigid closed belt with a width equal to L / 2 along the perimeter of the overlapping cell. The joints of the prefabricated elements 6 of the central section 3 of the floor are located in the sections of the floor with significantly less effort than in the patellar sections 1 of the floor, which provides the necessary strength of the joints.

Thus, the proposed flat precast-monolithic overlap is easier in the device, more reliable and versatile, that is, the span of the overlap cell and the load on it are not limited, suitable for different forms of the overlap cell and economical, due to the fact that the sections of the overlap cell can be performed either variable thickness according to loading, or with voids.

Claims (1)

Flat prefabricated-monolithic overlapping, based on columns at the corners of the overlapping cell, including supercolumn, intercolumn sections and a central section, characterized in that the supercolumn sections of the overlapping cell are monolithic, and the remaining sections are prefabricated, and the intercolumn sections are made of one or more precast elements a rectangular shape, and the central section is made of one rectangular element or of four or more triangular elements, while all prefabricated elements and sections of the cell are overlapped I firmly bonded to each other.

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