JPS582309B2 - Multilayer PC plate advance method - Google Patents

Description

[Detailed description of the invention] The present invention relates to a pre-installation method for multilayer PC plates.

The PC version pre-installation method is already in use, in which PC version walls are attached after the steel frame is assembled and before concrete floors are poured.

Also, in multi-layer PC, PC wall boards are installed in advance several floors above the floor where concrete such as floor beams will be poured.
The plate tip method is also used in some areas.

In this construction method, the PC boards are fixed to the steel frame for each floor, and the weight of the PC boards on each floor is all supported by the steel floor beams on each floor, so to speak, each floor is supported independently.

This method of independently supporting the weight of the PC board for each layer is possible only for steel frame structures, but is not possible for other structures, such as steel reinforced concrete or reinforced concrete. It is.

In other words, since the steel frame is small and scarce in SRC construction, it is difficult to support the weight of one layer of PC board as it is.

Also, in RC construction, there is no steel frame to support the PC version, so the idea of installing the PC version first is not viable.

The present invention has been made to improve these points, and is a multilayer PC board that can be used as is, not only in steel frame structures, but also in steel-framed reinforced concrete structures without any reinforcement, and even in reinforced concrete structures. The purpose is to provide a pre-installation method.

Next, an example will be described.

The PC plate used in the pre-installation method of the present invention has the following connecting materials embedded therein.

<1> Temporary receiving material A temporary receiving material 2 is provided protruding from the upper edge 11 or lower edge 12 when the PC plate 1 is attached to a wall and hung vertically.

In the illustrated embodiment, bolt heads are protruded from two locations on the upper edge 11 of the PC plate 1 as temporary support material 2, and a receiving plate 21 is fixed to the lower edge 12 corresponding to the position of the temporary support material 2. be.

However, it is also possible to protrude the temporary support material 2 from the lower edge 12, or to raise the upper edge 11 or lower edge 12 of the PC plate 1 into a curved shape without protruding any special member. The purpose of simple angle adjustment can be achieved.

In short, it is sufficient that the upper and lower PC plates 1 are substantially in point contact or in line contact.

<2> Upper connecting material The upper connecting material 3 is provided above the inside of the PC version 1 (inner surface of the building when installed as a wall surface).

This is a connecting member that attaches the upper part of the PC plate 1 to the frame and prevents it from falling outward.

In the embodiment, a box cutout 31 is made inside the PC plate 1, a tongue plate 33 is rotatably attached to a horizontal shaft 32 fixed horizontally inside the box cutout 31, and a screw hole 34 is passed through the tongue plate 33. show.

To attach this connecting member 3 to the horizontal beam H of the building frame, the beam H
A perforated plate 3 protrudes from the horizontal bolt 35 for adjustment.
6 bolt hole and the screw hole 34 of the tongue plate 33 with the bolt 37.
Penetrate and tighten.

The function that requires this upper connecting member 3 is that two types of objects can be easily connected and the distance between them can be adjusted, so that a wide variety of known members can be used.

<3> Refilling tool A replacement tool 4 is provided on the lower edge 12 of the PC plate 1.

This replacement tool 4 is a connecting tool that receives the load of the PC plate only after concrete is placed on the horizontal beam H, and transmits the load to the horizontal beam H after concrete placement, that is, to the frame.

In the embodiment, a steel box 41 is placed below the lower edge 12 of the PC plate 1.
has been drilled.

A screw hole for a vertical bolt 43 is provided in the bottom 42 of the box 41, and a tapped hole for a horizontal bolt 44 is provided in the surface of the box 41 on the body side.

The vertical bolts 43 are used to readjust the vertical direction of the PC plate 1 (adjustment after concrete placement as described later), and the horizontal bolts 44 are used to adjust the entrance and exit of the lower part of the PC plate 1. If the temporary support material 2 has an accurate height, the vertical bolt 43 may not be necessary.

A receiving groove 45 is recessed in the upper edge 11 of the PC plate 1 at a position corresponding to the reloading tool 4. If a structure in which the receiving groove 45 protrudes is adopted, the receiving groove 45 becomes unnecessary.

Next, a multilayer advance construction method using a PC plate with the above structure will be explained.

<1> Installing the beam Attach beam H to the pillar.

Beam H may be of steel frame construction, steel reinforced steel construction, or steel frame construction, and can be used on floors where concrete has already been poured (N
Attach beams H for multiple floors above the floor.

<2> Condition of PC version on the N floor It's all one.

Therefore, the weight of the PC version 1 on the Nth floor is supported by a frame with sufficient strength and remains stable.

<3> After installing the pre-attached beam H of the PC version, set the PC version 1 to N+1, N+2, N+
It will be installed up to about the third floor.

At this time, the fundamental difference from the conventional construction method is that the PC on the upper floor
The weight of Plate 1 is sequentially received by PC Plate 1 on the lower floor, and the concrete is
No weight in the vertical direction is transmitted to the beam H that is not wrapped around the beam.

The weight of the PC plates up to the N+3 floor will be supported by beams H, which have already been poured with sufficiently strong concrete.

Therefore, the weight of each PC plate 1 in the vertical direction is transmitted sequentially via the temporary support material 2.

Further, the upper part of each PC plate 1 is connected to an uncast beam H via an upper connecting member 3.

In this case, the load applied to the unconcrete beam H is just enough to prevent it from falling over, so the concrete can be sufficiently supported by steel reinforcing bars or rebar beams that have not been poured and reinforced with chairs.

When the PC plate 1 is placed on the temporary receiving material 2 of the lower PC plate 1, the replacement tool 4 on the lower edge 12 of the upper layer fits into the receiving groove 45 recessed in the upper edge 11 of the lower PC plate 1.

In this state, the lower end of the vertical bolt 43 is adjusted to be in contact with the upper surface of the beam H or the upper surface of the receiving plate 46 extending from the beam H, and no load is transmitted.

Furthermore, the horizontal bolt 44 is used to adjust and fix the lower end of the PC plate.

<4> Concrete pouring on the N+1st floor When concrete is poured on the beam H and floor on the N+1st floor, the box 42 of the replacement tool 4 and the receiving plate 46 are also poured with concrete.

As a result, the weight of the pre-attached PC slabs on the N+1st floor and above has reached a point where it has sufficient strength after the concrete is poured.
It will be supported by the beam H on the +1st floor.

Therefore, the PC version 1 on the upper floor can be installed.

As described above, in the present invention, the upper layer of PC plate is vertically mounted on the upper edge of the PC plate whose lower edge is attached to the beam after concrete pouring, and concrete is poured onto the beam sequentially from the lower layer. This is a construction method in which the load of the PC plate of that layer is then transferred to the beam.

Therefore, the following effects can be expected.

<1> The vertical load of the pre-attached PC plate is not applied to the unconcrete beam at all, but is entirely applied to the concrete-concrete beam and floor through the lower PC plate.

Therefore, even in the case of a steel-reinforced frame with a low steel cross-section and strength, and even in the case of a steel-reinforced frame with no steel frame and therefore unable to support the weight of the PC board at all, the strength when concrete is not poured is the same. It doesn't matter <PC
It is possible to pre-apply plates on multiple levels at the same time.

<2> If the contact parts of the upper and lower edges of the PC plates are temporarily supported by point or line contact, even when a large number of PC plates are loaded in advance, vertical alignment can be easily achieved by adjusting the upper connecting material. corrections can be made.

[Brief explanation of drawings]

FIG. 12 is a perspective view of an embodiment of the multilayer PC board pre-attaching method according to the present invention, FIGS. 2 to 4 are sectional views of essential parts thereof, and FIG. 5 is a side view thereof. i: PC version, 2: Temporary receiving material, 3: Connecting material, 4: Replacement tool.

Claims (1)

[Claims] 1. P whose lower edge is attached to a beam or floor after concrete pouring
The upper layer of PC plates is mounted almost vertically on top of the upper edge of the C plate, concrete is poured into the beams and floor from the lower layer, and then the load of the PC plates of that layer is transferred to the concrete pouring area. Multi-layer PC plate pre-installation method. 2. The construction method according to claim 1, wherein the contact area between the upper and lower layers of the PC plate before being replaced in the concrete placement area is substantially point or line contact.