JPS5931627B2 - Extension construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an extension construction method for an existing apartment complex.

Due to the increase in the number of families and the desire to improve the quality of housing, existing apartment complexes with reinforced concrete structures are facing the need for expansion and renovation.

By the way, in addition to the floor plan constraints when building an extension to an existing apartment complex, there are structural problems as well, and furthermore, prompt construction is required.

This invention was developed to solve the above problems, and details thereof will be explained below with reference to illustrated embodiments.

Existing building A, especially adjacent building B to its balcony 1.
Build.

Then, the steel columns 2 of the expanded building B are erected on the foundation 3, and the steel girders 4 and beams 5 are erected between each column 2, 2.

The columns 2, girders 4, and beams 5 will be coated with fireproofing later.

In addition, the gusset plate 6' can be used to weld slab reinforcing bars, etc. of existing buildings by separating the tip of the veranda 1 or external wall surface, etc.
A steel frame 6 with a U-shaped cross section is fixed using anchor reinforcing bars 7 and plastic mortar 8.

A flange 9 is provided to protrude from this steel frame 6 to form a pigtail receiving frame 10.

A precast reinforced concrete floor slab 11 is installed between the pigtail receiving frame 10 and the girders 4 and beams 5.

A horizontal force transmission mechanism 1 is installed at the supporting portion of the slab 11 of the pigtail receiving frame 10.
2 and a height adjustment mechanism 13 are provided.

This height adjustment mechanism 13 adjusts the levelness of the floor slab 11 and the height of the floor slab 11 with respect to the balcony 1.

The pillars 2 are also constructed so that their height can be adjusted relative to the balcony 1. For example, as shown in FIG.
The bolt insertion hole at the end or the bolt insertion hole in the pillar 2 is left as a loose hole, and the height is adjusted as the rear pillar 2 on which the floor slab 11 is installed sinks.

Next, sand mortar is spread on the veranda 1 and the floor slab 11, a joist platform is laid, and tatami mats 14 are laid down to finish the floor.

For the roof of the extension building B, there are 4 girders and 1 roof slab on 5 beams.
5 will be erected and the sheet will be waterproofed, etc.

Furthermore, walls 16, fittings 17, etc. are installed between floor slabs and slabs.

By the way, the height adjustment mechanism 13 and the horizontal force transmission mechanism 1
Various design examples of 2 are shown in FIGS. 5 to 12.

FIG. 5 shows a mechanism 12 in which a loose hole is used to adjust the height when adding a flange 9 to a U-shaped cross-section steel frame 6 using bolts 18.

A reinforcing plate 19 is fixed to the lower surface of the end of the floor slab 11, and this reinforcing plate 19 is installed on the flange 9.

In addition, the horizontal force is transmitted between the flange 9 and the reinforcing grate 19.
This is done by welding.

In FIG. 6, a bolt 20 is inserted through the reinforcing plate 19, the lower end of the bolt 20 abuts on the flange 9, and the height is adjusted by a nut.

The horizontal force transmission mechanism 12 is provided separately from the height adjustment mechanism 13, and horizontal force transmission is achieved by welding the end upper surface reinforcing material 19' of the floor slab 11 and the U-shaped cross-section steel frame 6 to each other with a connecting plate 21 interposed. Let's do it.

Fig. 7 shows a flange 6'' fixed to the lower surface of the steel frame 6 protruding from the balcony 1, a screw 22 interposed between it and the flange 9, and a bolt 18 tightened after adjusting the height of the flange 9. It's Nishide.

Note that the horizontal force transmission is the same as in Fig. 5.

FIG. 8 shows a modification of the flange 9.

In FIG. 9, the bottom plate 12 of the overhead piece 23 fixed to the side surface of the steel frame 6 is screwed together, and the height is adjusted by bringing the upper end of the small column loosely fitted into the overhead piece into contact with the reinforcing plate 19.

Horizontal force transmission is performed by a horizontal force transmission mechanism 12 similar to that shown in FIG.

Figure 10 shows a wedge 2 between the flange 9 and the reinforcing plate 19.
4 is inserted, and it is advantageous to use it in combination with the one shown in Fig. 6.

In FIG. 11, the wedge 24 is operated by a bolt 25.

Fig. 12 shows a structure in which a flange 26 is provided downwardly protruding from a reinforcing plate 19, overlapped with a flange 9 provided vertically protruding from a steel frame 6, the height is adjusted with bolts 27, and then fixed with bolts 28. .

The reinforcing plate 19 and the reinforcing material 19' may each be a plate or an angle material, and may be either a continuous material or a partial piece material.

The present invention has the above-described configuration, and since an extension is constructed following the balcony outer wall of an existing building, the number of rooms can be increased relatively easily even in a multi-story housing complex.

In addition, in this case, a receiving bone is placed at the tip of the veranda, etc., and one end of the precast floor slab is supported by this, so the structure is simple, and the existing building and the extension part are continuous in terms of floor plan, and the structure is improved. can also be integrated.

Furthermore, since the height can be adjusted at the supporting part of the precast slab of the pig bone, even if the pivot of the extension part sinks after construction, it can be corrected at the connection part, and the height of the veranda, etc. It is possible to easily expand the structure to accommodate dimensional errors.

Furthermore, by using steel frames for the columns, beams, and girders, and precast members for the floor slab, it is possible to construct the building more quickly than in an existing building that requires fewer modifications.

[Brief explanation of drawings]

The drawings show embodiments of this invention, and are shown in Figs. 1 and 2.
The figure is a plan view, Figure 3 is a vertical sectional view, Figure 4 is a sectional view of the addition of the veranda and pillars, Figures 5, 6, 7, 8, 9, and 10. , FIG. 11 and FIG. 12 are cross-sectional views of the bones of the balcony and floor slab. A: Existing building, B: Added building, 1
...Balcony, 2...Column, 3...
・・Foundation, 4・・Girder, 5・・Beam, 6・
... Steel frame, 6' ... Gusset plate,
6...Flange, 7...Anchor reinforcing bar, 8...Plastic mortar, 9...
...Flange, 10...Pigtail bone, 11...
・Floor slab, 12...Horizontal force transmission mechanism, 13...
...Height adjustment mechanism, 14...Tatami, 15...
...Roof slab, 16...Wall, 1T...
・・Joinings, 18・・Bolts, 19・・・・
Reinforcement plate, 19'...Reinforcement material, 20...
... Bolt, 21 ... Connection plate, 22 ...
...Screw, 23...Piece, 24...
Wedge, 25... Bolt, 26... Flange, 27... Bolt, 28... Bolt.

Claims (1)

[Claims] 1. Construct pillars, girders, and beams for the extension in close proximity to the existing building, fix the cast iron bones to the end of the veranda or external wall, and place a precast floor between the cast iron bones and the girders and beams for the extension. Erection plates, etc., transmit the horizontal force of the added part to the existing building through the pigtail receiving bone, and adjust the height at the supporting part of the precast floor slab of the pigtail receiving bone, and then install it on the veranda and precast floor slab. An extension construction method characterized by applying an unfinished finish.