SU1728431A1 - Prestressed formwork - Google Patents

Abstract

Invention mb, used in the construction of residential, civil and industrial buildings and structures. The pre-formed formwork consists of formwork panels, sliding connecting elements and prestressed tubes with spacer-clamping elements, with the boards made with pressure beam elements fixed in their lower part, and the sliding connectors are provided with rollers, and the pre-load bars are made in the form of cables passed through spacer-clamping elements and rollers and their ends are fixed on pressure-bar elements, and spacer-pressure elements are made of a rod with thread and schayuscheys thereon a holder in which an aperture for the passage of cables. 7 il.

Description

The invention relates to the construction and can be used for the construction of monolithic concrete and reinforced concrete walls of residential, civil and industrial buildings and structures, in particular monolithic walls of homestead-type residential buildings.

The purpose of the invention is the expansion of technological capabilities

FIG. Figure 1 shows the pre-formed formwork, general view; in fig. 2 - armored package prior to installation of tooling to compensate for hydrostatic pressure, cross section; in fig. 3 - the first stage of installation on the boards or panels of the reinforcing package of the tooling; in fig. 4 - the formwork preload principle; in fig. 5 - the final stage - filling the cavity with a prestressed cavity with a construction mixture

formwork (armored form) package; in fig. 6 - diagrams of forces and bending moments (to the determination of the zones of the highest hydrostatic pressure on the boards or panels of prestressed formwork (reinforced concrete package); FIG. 7 is a constructive solution of an expansion-clamping bolt.

The design of prestressed formwork or reinforcing package consists of boards or panels 1, sliding connecting elements 2, half-frames with one or several pairs of spacer-clamping bolts 3, fitted with vertical plates 4, and if necessary also horizontal plates 5 or dotted supports 6. At the same time sliding fasteners 2 fix the top 7 of the shields or panels 1, and the upper half of the panels are flexible tensioned

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ropes (cables) 8, passed through sliding connecting elements 2 with rollers 9, and spacer-clamping bolts 3, simultaneously fastened with carabiners 10 to the mortgage parts 11. The latter also serve to install clamping beams 12 in them fixing the bottom of boards or panels 1, and for the installation of distribution plates 4, with the upper end of the sliding tooth elements 13 fixed by the tooth 13.

The proposed design works as follows (for example, armored package).

They assemble armored packages, fixed panels of which are connected by flat diaphragms of rigidity. The bottom of the panels 1 is fixed clamping beams 12 installed in the embedded parts 11 (Fig. 2). Thin panels 1 have a negligible bending stiffness and are therefore very deformable when filling the cavity of armating packages with mortar and therefore, to ensure the stability of the geometric shape, they must be pre-tensioned. On the top 7 of the panels 1, sliding fittings 2 are installed with rollers 9, through which flexible tension cables (cables) are passed, with spacer-clamping bolts 3 fitted with dotted supports 6 or vertical plates 4 fixed to them, and the need for horizontal plates 5 (Fig. 3). The carabiners 10 are secured to the inserts 11. Spacer-clamping bolts 3 point supports are set perpendicular to the plane of the panels 1 in the zones of the highest hydrostatic pressure. In the case of massive construction, instead of a point support 6, vertical 4 and horizontal 5 distribution plates are mounted, the vertical distribution plates 4 are secured by the tooth 13 of the sliding connecting elements 2 with the upper end, and the lower end is installed in the fixtures 11. Then, by turning the handle the bolts 3, the armoring packages are pre-loaded by the amount specified by the calculation (Fig. 4). As a result, panel 1 acquires a prestress. The filling of the cavity of the reinforcement package compensates for some of its concavity resulting from the prestressing of the panels 1, with the expansion of the hydrostatic pressure perceived by the spacer-clamping bolts 3 and flexible preload straps (guy) (Fig. 5). To achieve the standard characteristics of monolithic concrete dismantled

tooling in reverse mounting sequence.

The proposed design of prestressed formwork or reinforcement package for the construction of monolithic

structures simplifies the technology of manufacturing monolithic structures by reducing the weight (about 10 times) and material consumption of production equipment as compared with the large-shield formwork used (the weight of the set for 1 type of residential house is 50 tons) and avoids the use of heavy crane equipment, significantly reduces erection time and maintenance costs. The proposed technical solution fits into the framework of the so-called GICS technologies (flexible engineering-constructive systems), which allow implementing practically any architectural planning solutions with the most varied configurations of buildings and structures in the plan.

Claims (1)

Formula of pre-tensioned formwork, including formwork panels, sliding connecting elements and prestressed drafts with spacer-pressure elements, characterized in that, in order to expand technological capabilities, the boards are made with pressure beam elements fixed in their lower part, and sliding connecting elements are provided with rollers, while the prestressed mounts are made in the form of the cables passed through the spacer and pressure elements and rollers, and their ends are fixed on the pressure beam elements, moreover, the spacer and pressure elements are made of a threaded rod and a cage moving through it, in which a hole for passage of cables is made.  Phie.1 co r oo cs r