RU2308587C1 - Method for timber floor structure reconstruction - Google Patents

Abstract

FIELD: construction, particularly to create reinforced concrete floor panel during reconstruction of building having timber floor structure.

SUBSTANCE: method involves preparing old floor assembly along with mounting post installation under each joist in support and span parts thereof; arranging mesh reinforcement and pouring concrete mix; demounting old floor structure as concrete gains necessary strength. Timber joists are preliminarily cut in area of timber joist connection to wall and old timber floor structure is used as removable form. Old floor structure is demounted with the use of cable, pulley and winch system fastened to new floor panel. Cables pass through orifices created in new floor panel.

EFFECT: decreased labor inputs.

3 dwg

Description

The invention relates to the field of repair and construction production, in particular to methods for monolithic reinforced concrete floors during reconstruction and overhaul of buildings with wooden floors.

As a rule, the main problem of buildings of this type is the decay of the supporting parts of wooden floor beams, as a result of which the building often goes into the category of emergency. In this case, a set of measures is taken to dismantle the old floors and erect new ones in their place in reinforced concrete or using new metal floor beams.

The use of existing technologies entails a significant increase in the complexity and cost of the reconstructed floor, (especially when using metal beams), therefore, the goal was to create a new technology for the reconstruction of the old floor, which would take into account all the problems and experience of existing developments.

A known method of reconstruction of wooden floors (ed. Certificate. No. 1838552, class E04G 23/00, bulletin No. 32, 1993), which includes the following operations: disassemble the floor and fill the floor, roll off, leaving wooden beams and a false ceiling to which is attached embedded parts; longitudinal working reinforcement is laid along the beams, transverse reinforcement is installed and layer-by-layer concreting is performed.

The disadvantage of this method is the high complexity, the large thickness of the resulting floor, which increases the load on the bearing walls and decreases the height of the ceiling

There is also a method of replacing floors (ed. Certificate. No. 5778412, class E04G 23/00, bulletin No. 40, 1977), consisting of the following operations: the floors and filling between the beams are disassembled, leaving binder in the locations of the bearing ribs, nests for the support of the ribs in the brickwork, the ceiling lining is strengthened by hanging stiffeners or temporary struts, reinforcing frames of the supporting ribs are installed on the selected sections, their ends are inserted into the nests in the wall and the grid of plates between the ribs is laid on the supporting floor structure, after h its ribbed slab is concreted.

The disadvantage of this method is the high complexity, the large thickness of the resulting floor, which increases the load on the bearing walls and decreases the height of the ceiling

The prototype of the invention is a method of reconstructing a wooden floor using monolithic reinforced concrete (Kutukov VN Reconstruction of buildings. - M .: Higher School, 1984, p. 212-222, Fig. 124), consisting in the following: first, the floor structure is disassembled, for monolithic reinforced concrete fasteners arrange nests in the walls, lay reinforcement on a wooden run, install temporary ceiling fasteners, and then concreted.

The disadvantage of this method is the high complexity, increasing the thickness of the resulting floor, which increases the load on the bearing walls and decreases the height of the ceiling.

The invention is aimed at reducing the complexity of reconstruction of a wooden floor and reducing the thickness of the floor.

The result is achieved in that in a method of reconstructing wooden floors of buildings, including preparing an old floor with installing mounting racks for each of the beams in the support and span parts, installing reinforcing meshes and laying concrete mixture, according to the invention, the wooden floor beams in the places of attachment to the wall are pre-sawed , the old wooden floor is used as a removable formwork, and after the concrete has set its design strength, the old floor is dismantled using a system of ropes, blocks and winches fixed on a new floor, dismantling ropes are passed through holes specially formed in the new floor.

A distinctive feature of the claimed invention lies in the fact that the old wooden floor is used as a removable formwork, and after concreting the reinforced concrete floor, the old wooden floor is dismantled with winches attached to the new floor, thereby reducing the thickness of the resulting slab.

The invention is illustrated by drawings. Figure 1 shows the preparation of the old floor, where 1 is a brick wall; 2 - wooden joists; 3 - mounting racks; 4 - places of sawing. Figure 2 shows a section of the floor with a new reinforced concrete floor, where 5 - reinforcing mesh of the new floor; 6 - sleeves provided for the formation of holes in a new reinforced concrete floor for passing dismantling ropes; 7 - concrete. Figure 3 shows a diagram of the dismantling of the old floor, where 8 is a block mounted on a new floor; 9 - dismantling ropes.

The reconstruction method is as follows:

1. Preparation and use of the old floor as a formwork - in the supporting and span parts under each of the beams 2, mounting racks 3 are installed, after which 4 beams 2 are sawn in the places of their attachment to the wall 1 (Fig. 1). Leveling and, if necessary, leveling the surface of the floor, as well as detaching the boardwalk from the beams of the floor, is carried out.

2. The device of a monolithic reinforced concrete floor - after installing reinforcing meshes 5, install sleeves 6 provided for forming holes in the new reinforced concrete floor for dismantling ropes 9 along the sides of each of the beams 2 (figure 2) and after that concrete mixture 7 is laid.

3. Removing the old floor - after building concrete with concrete strength 7, using a system of blocks 8 and ropes 9 connected to the winch, encircling the dismantled beams 2, they remove the old wooden floor through the holes in the monolithic slab (Fig. 3).

The proposed method of replacing a wooden floor with a new reinforced concrete provides a reduction in the complexity of reconstruction of a wooden floor, a decrease in the thickness of the floor, the safety of work; the ability to work anywhere in the building without affecting adjacent structures; maintaining the structural integrity of structures; the possibility of using the method in the reconstruction and overhaul of buildings. The application of this technology is possible in the construction of monolithic reinforced concrete floors of various spans and structural solutions - beam and beamless.

Claims (1)

The method of reconstruction of wooden floors of buildings, including the preparation of the old floor with the installation of mounting racks under each of the beams in the support and span parts, the installation of reinforcing meshes and the laying of concrete mixture, characterized in that the wooden beams of the floors in the places of their attachment to the wall are pre-sawed, old wooden the floor is used as a removable formwork and after concreting the reinforced concrete floor, the old wooden floor is dismantled using a system of ropes, blocks and winches, for mounted on a new floor, dismantling ropes are passed through holes specially formed in the new floor.

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