JPS59134261A - Floor structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wide-plane reinforced concrete floor (structure).

Conventionally, as this type of floor structure, a reinforced truss: f or PCWA (fJe) is known.

Is the former reinforced truss the part of the beam that receives the floor load? Regarding the removed portion, the 0 beam &Is portion where the reinforcing truss is used is considered to be a - role reinforced concrete structure. Reinforcement truss C, preliminarily: l: 47%
The truss-shaped reinforcing bars of a predetermined length are pre-assembled at the site, and the reinforcement is laid out in such a way that the frame is passed between the floor beams at the site. Ru. That is, first, the entire lower part of the reinforcing bar truss without reinforcement is covered with a large number of formworks and the entire area between the beam parts on the 'F side of the reinforcing bar truss. This formwork is suspended directly below the reinforcing steel truss. There is no need for shoring for support or a gantry for shoring. And then welded wire mesh on the rebar truss? After the gi is packed, is it concrete? Pour concrete. And the hardening of concrete? Wait, formwork? It is removed.

Floor structures employing such reinforced trusses have the following advantages:

■ There is no need for shoring to support the floor formwork or gantry for shoring, streamlining and labor-saving on-site work.

■ Factory-produced reinforcing bar truss eliminates the hassle of on-site reinforcing work and creates a floor with high precision. The construction period was short, but on the other hand, ■' Because the beam section where the reinforcing bar truss is spanned is a conventional reinforced concrete structure with a relatively small beam width, it was difficult to construct due to strength problems of the reinforcing bar truss itself. Control by itself! 1(
The maximum span of the slab is limited approximately to its length.

On the other hand, in the floor 4, '3 structure that uses the latter type of PC steel wire mentioned earlier, the PC steel wire covered by the sheath is attached to the floor. The beam portions and the mutual VC between the beam portions are effectively arranged. When the poured concrete reaches the required compressive strength, the hardened concrete member itself is used as a support material and the tensile stress is applied to the PCML wire. This construction method, in which prestress is applied to the concrete member by applying pressure, is called the post tension method.

A floor structure that uses PC'M@p like this has the following advantages: ■ A span that is larger than the conventional one without increasing the floor thickness? The key is to build a floor that is economical.

■ LJ, the floor of the building is smaller than the income, and is it the same? Low and monkey 0
However, on the other hand, (j)' A special support is needed to ensure that Qζ and PCC steel wire 2 are properly placed when placing the PCl4 wire and placing concrete. Do you need it and its positional accuracy? There are problems such as the time-consuming process of pouring concrete to maintain the condition.

In this invention, for the floor beam part, the reinforcement truss and PC
Adopt both the C silver wire and the reinforcing bar truss for the parts between the octopus beams. Each problem k tit while making use of it? Together, they provide a durable floor structure.

Hereinafter, the present invention will be described based on embodiments illustrating the invention.

FIG. 1 is a plan view of the floor according to this invention, and 1 in the figure is the floor? Shows supporting pillars. The pillars lc'i are spaced at intervals of 9 m in the left and right directions in the figure, and qm apart in the vertical direction in the figure. Beams 2 are interposed between adjacent pillars in the left and right direction in the diagram.
Qin muscle truss B is arranged? Between these beams 2, a reinforcing bar truss 3 is placed along the top and bottom in the figure so that the frame is passed. In this example, this reinforcing bar truss 3 is It has a truss structure as shown in Figure 9. This has been pre-assembled to a predetermined length at the factory.
The reinforcing bars 4 at the upper and lower ends are arranged perpendicularly to the inner reinforcing bar truss 8. The reinforcement bars 4 at the upper and lower ends extend so as to be continuous with the reinforcing bar truss 8 that is passed between the beams 2, and are 60 lower.
Inside the beam 2, a PC steel (5) is galvanized along its longitudinal direction. This PC steel wire 5 has a peak at the upper part of the column 1, that is, the part located at the end of the beam 2, and is located at the center of the beam 2 at the middle part of the column 1, as shown in Fig. 2&C. They are arranged in a wavy pattern with valleys in the middle.

In this embodiment, as the PC wire 5, unbonded PC: +1
．． 4 wires are used. This unbonded PC: (v
The wire is made by applying grease and covering the PCyp wire with a polyethylene sheath.
Regarding the arrangement of the steel wire 5, the reinforcing bar truss 3 or the PC steel '1 located at the end of the beam 2 is effectively utilized.
As shown in Fig. 3(a), the peak of l15 is located at the center of the 0 beam 2 bound by the above-mentioned upper end reinforcement 4VC binding line (not shown). As shown in Fig. 3(C), the valley part of No. 5 is bound to the reinforcement bar 4 at the lower end of the VC by means of a tie rod (not shown). Therefore, l'c#4 wire 5 is The wiring is well positioned regardless of the support. The curved part of the PCd line 5 is shown in Figure 3 (b1 is bundled 0) and the reinforcing bar truss 8 and the PCd wire 5 are arranged like this.
The portions of the beams 2 where the reinforcing bar trusses 8 are placed and the portions between the beams 2 where the reinforcing bar trusses 8 are arranged are constructed using TCL as follows.

In other words, the formwork is made of 2 pieces of formwork (Ill. There is no need to camp for construction.After that, welded wire mesh 7 is laid on each reinforcing bar truss 8, and then concrete 8 is poured.For the beam 2 part, the poured concrete 8 is required. As soon as the compaction strength IIC is reached, this hardened concrete member itself?PCIA as a supporting material.
A tensile stress of 7] degrees is given to eA5. This gives prestress to the beam 2. After the concrete 8 has hardened, each formwork is removed.

But what about the floor load? 2 parts of the beam to receive? Conc + r -) j + In (!:
'EE, and prestress is applied to the beam 2 portion by the PCf14 wire 5.

By introducing pre-stress to the rice cake 2, the rice cake 2 itself has sufficient strength and is prevented from being bent and cracked. Therefore, this beam 2 is particularly small in beam size and beam width in the central part. Can be made larger. Is the former the height of the floor? In this embodiment, the beam structure 13 at the center of the beam 2 is
is reduced to 3σ, and the end portions of Liang Cheng14 and 6Qα
It also has strength. On the other hand, is the latter the span between beams 2? It is advantageous to make it bigger and use G to make it bigger. That is, the beam width l that occupies within the distance E2 between the beams 2
, the range of the force 1 becomes larger.The frame over these two beams has a distance of 06 x 2 k, which is sufficiently larger than the length of the reinforcing bar truss 8 itself, which is naturally limited by the degree problem. It depends on the settings.

In this embodiment, the beam width l is 3 m.

Liang 2! In the 5 section, stirrups 9 and lower main reinforcements 1O as shown in Fig. 4 are arranged.
The frame is passed between two beams.Reinforcement truss 3 between the upper and lower parts in Figure 1
corresponds to the space between the six pillars L placed vertically in the same figure.Although the reinforcements are densely arranged in some places, α (μ in this example), Reinforcement truss 8 and 1 may be arranged at the same intervals as other locations, but in rare cases, reinforcement trusses 8 and 1 may be arranged at intervals of 1B among the number of stages between the columns l. 8) Good, with some ribs placed on the cheeks.

Below, PC steel wires are placed in the same direction as the reinforcing bar truss 8 in the same direction as the spherical parts between the beams 2, and in l locations for each reinforcing bar truss, and also in the direction orthogonal to the reinforcing bar truss 3. P C&LY4 at certain intervals? By arranging A 5i directly and applying prestress, the performance of the spherical part between the beams 2 can be improved (C can also be made even more similar to the above ◇ In addition, P C to the reinforcement bars t and reinforcing bars 6) @ 4M 52 Positioning ■Is there something appropriate to support it other than the binding wire? It depends on what you use.

As explained above, the floor structure according to the present invention is adopted in combination with both the reinforcing bar truss and the PCM panel, so it has various effects such as the following. Playing O ■ Rebar truss? By using this, there is less need for floor skin maintenance, and after the formwork is installed on the upper floor, the lower floor is used as a stockyard for finishing work such as roof decks, work space for other work, and materials, etc. By using it, the degree of freedom of the sleeping technique increases, and healing becomes easier.

Li 粱-11 My father was small, and the height of the building was small, so even with the same number of vj, the height was low, which was advantageous in terms of limiting shadows and diagonal lines, and it was also clear from a two-dimensional perspective. Since l!a is small, l!a
The smaller the tiered surface (a), the more effectively used area of each floor increases.

■ Compared to conventional reinforced concrete floors, it is cheaper and takes less time to construct.

(j) Will the introduction of prestress cause cracks in the floor or excessive bending of the long sleeve? Prevention is the monkey.

■ Since there is no beam type, the ceiling piping and ducts can be freely arranged and economical planning is possible.◇ ■ There are no crosspieces such as formwork, which saves the effort of cleaning up and sweeping.

■ The reinforcing bars are pre-assembled at the factory, and the formwork 'f1' supported by the reinforcing bar truss: There is no need for construction space for processing the reinforcing bars on site.

[Brief explanation of the drawing]

The drawing shows an example of disaster relief of this invention, and Fig. 1 shows the reinforcement arrangement (i.e.
Made? Figure 2 is a cross-sectional view taken along the line II-II in Figure 1, Figure 3 is a vertical cross-section 1Δ taken along the line Ill-Ill in Figure 1, and Figure 2 is a partially enlarged view of Figure 2. Figure S is a partially enlarged view of Figure 3, Figure 6 is a sectional view taken along line ■-■ in Figure 1, Figure 7 is a sectional view taken along line ■-■ in Figure 1, a
sg diagram (al + (bl * fCIG; t P L
Arrangement of '414'f71! An explanatory diagram of this state, FIG. 9 is a perspective view of the reinforcing bar truss. 2...Beam, 3...Reinforcement truss, 5...
...PC karimasen. Shimizu Construction Co., Ltd.

Claims (1)

[Claims] The beam part that carries two floor loads? The entire floor including ft has a concrete structure with reinforced truss reinforcement, and a prestress is applied to the beam by placing PC steel wires along the longitudinal direction of the beam. Floor structure◇