JPS62273339A - Construction method for laminating box shaped concrete block - 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] 3. Detailed Description of the Invention The present invention relates to a prefabricated construction method for wall structure reinforced concrete buildings, and particularly relates to a construction method in which a construction unit is formed into a three-dimensional block. It also relates to a construction method in which these are assembled vertically, every other side, and in a checkerboard pattern when viewed from an elevation.

It is known that in the prefabricated method of building buildings, reinforced concrete or steel unit members are sized to correspond to the span and floor height, and the building is assembled using the prefabricated method. It is being One such device is one in which f pairs of side walls are connected by one slab to form a rectangular tunnel-shaped unit with a gate-shaped cross section. The construction method using these is as shown in Figure 7 (1).
A type in which the auxiliary slabs 2 are stacked directly above the laminates and an auxiliary slab 2 is added between the laminates arranged adjacent to each other at intervals, or as shown in the same figure (2), the unit 1 is stacked in the span direction. , was constructed by spanning every other slab horizontally and vertically in the height direction, and was intended to supplement the supplementary slab 2. ]-shaped partial unit bodies 3 are also used in the spaces that inevitably occur on the outside of these buildings, and floor slabs 4 are also added. ] The shaped units may be a slab 2 and a wall 5.

On the other hand, a horizontal box-shaped prefabricated unit is also known, in which a slab is further added to the lower part of the above-mentioned portal unit. Examples include segments for tunnels and culverts, and immersed boxes. These prefabricated structures are connected in the tube axis direction and are not intended to be stacked. Furthermore, if this were applied to prefabricated buildings, it would be possible to install it on the foundation, with the lower slab serving as the floor and the upper slab serving as the roof, but such prefabricated units could not be used in multi-story buildings. There isn't.

The first problem that can be raised when constructing a multi-story building with a wall structure like the conventional example using prefabricated units is that the prefabricated units are used as the wall structure. For example, in the previous example of the frame shown in Figure 7 (1), the only connection in the cross section is the auxiliary material slab 2, and each laminate has the strength of an independent wall frame, but The second problem is the strength of the gate-shaped unit l, but within the normal range of wall thickness and slab thickness, the columns and beams of the gate-shaped rigid frame are weak. This is not as good as a normal rigid frame structure, and it requires the actual length of the wall in the cross-sectional direction, and orthogonal walls with a butt wall effect are installed on both end faces or in the middle, and the formwork for prefabrication is required. This complicates assembly and disassembly, reduces the opening of both ends, and limits the usable space inside.The third problem is that when standard unit units are stacked one after the other, the ends of the building part The problem is that a large number of auxiliary members are required for the non-repetitive parts that inevitably occur.

Further, in both the examples shown in FIGS. 7(1) and 7(2), many auxiliary simple slabs 2.4 are required. Therefore, the number of joints between these auxiliary members, the standard unit body, and the auxiliary member units increases, which detracts from the advantages of the prefabricated construction method.

Next, it goes without saying that building a multi-story building by connecting or stacking box-shaped prefabricated units means that all the side walls and slabs will be duplicated, and the materials will be doubled. Therefore, this is out of the question, and construction methods for such cases have not yet been developed.

The present invention was developed for the purpose of eliminating the problems of prefabricated construction methods when constructing reinforced concrete multi-story buildings with wall structures.

That is, the present invention is a method of constructing a multi-story building by structuring precast concrete units in a horizontal box shape, and stacking the box-shaped units every other time in the horizontal and vertical directions. Although it has a "checkered pattern" structure, the gist is that the means for joining these units is configured to be suitable for box-shaped units. In such a construction method, since all the corners of the box-shaped unit become joints, an engaging means for vertically-related concave-convex fitting is provided here, as well as mutual connection at this retaining part. A construction method has been developed which is characterized in that a multi-story building is constructed by only joining box-shaped units in the standard lamination process.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described based on an example of a multi-story building shown in the drawings. FIG. 1 is a perspective view of a box-shaped block body which is a main component of the present invention, and FIG. 2 is an elevation view of a reinforced concrete multi-story building with a wall structure constructed by laminating the box-shaped block bodies. Figure 3 (1) is a standard plan view of the nth floor;
) is a plan view of the n+1 floor directly above or below.

In FIG. 1, the box-shaped block body 10 is formed by three-dimensionally connecting an upper slab 12 and a lower slab 13 at the top and bottom of a pair of opposing side walls 11. A pair of side surfaces 14 and 14 are not provided with walls and are left open. Its cross-sectional size is around the normal floor height of 2.5 m, and the slab span is 4 to 6 m.

Such a box-shaped block body 10 is used as a construction unit and is stacked to form a multi-story building as shown in FIG. As shown in Fig. 3 (1), this stacking is done by arranging unit bodies 10 in parallel every other span with their end faces 14 aligned on a standard nth floor.
On the corner of the two units 10 on this floor,
), the unit bodies 10 on the n+1 floor are straddled and assembled. Therefore, when Fig. 3 (2) is set to the n-1 floor, the relationship with the nth floor above is also the same, and the stacking of the unit bodies 10 is the 7th floor.
It is similar to the stacking of unit bodies 1 in Figure (2), and each unit body 10 has one span, and every other floor is stacked horizontally and vertically.
Forms a checkered pattern in elevation.

In the 8-span, 5-story building shown in FIG. 2, the auxiliary wall 5 and the partial unit 3 on the top floor are used together for assembly.

Returning to FIG. 1, the configuration of the unit IO will be explained in more detail. The side wall 11 of the unit IO has upper and lower slabs 12.
Along the joining line with 13, an uneven engagement means 15 is provided. That is, the recesses 16 are cut out at equal intervals to a width equal to the wall thickness,
It is formed in the same shape as the portion left as the convex portion 17 in the middle. This engagement means 15 is arranged such that the order of the concave and convex portions on the upper and lower edges of the side wall 11 is reversed, so that the convex portion 17 of the unit body 10 on the upper floor is connected to the convex portion 17 on the unit body on the lower floor, as shown by the arrow in the center of FIG. The concave portion 16 on the upper floor receives the convex portion 17 on the lower floor. Therefore, in order for the side walls 11 to be connected vertically on the same plane and the upper slab 12 on the lower floor to be connected on the same plane as the lower slab 13 on the upper floor, each cross section of the recess 16 and the protrusion 17 should be Although it is designed to have substantially the same dimensions as the thickness of .13, it is preferable to provide relief at the convex portion 17 for the dimensions required for construction of laying mortar and filling mortar.

For such engagement means 15, it is effective to provide a thick walled portion with a chamfer 18 along the inner corner formed at the joint between the side wall and the slab.

The box-shaped block 10 has a length spanning the entire span of a typical building in the span direction, as shown in FIG. In the case of a multi-span building, the structure shown in FIG. 3 (1) may be installed consecutively, or the devices shown in FIGS. 3 (1) and (2) may be installed consecutively. However, for the relationship between upper and lower floors, the stacking method shown in Figure 2 is always repeated in a checkered pattern.

The box-shaped block unit 10 is made of reinforced concrete and manufactured individually by prefabrication, and the total capacity is within the capacity of a large crane. Prefabrication is manufactured with precision using steel formwork, and is usually carried out in horizontal formwork.

FIG. 4 shows an example of reinforcement for the unit body 10.

(1) The figure is a top plan view, (2) the figure is an elevation view, (3),
(4) Figures are cross-sectional views shown at positions A and B in Figure (2), respectively.

Each of the figures in Fig. 4 shows the lack of reinforcement 20 in the recess 16 for the above-mentioned engagement means, (3) the reinforcing bars 21 in the upper slab in the figure are loose at the four parts 16, and (4) in the figure Together with the lower slab, it serves as a distribution bar. When a thick chamfer 18 is provided at the inner corner of the unit body 10, the reinforcing bar in the recess 16 can also be an annular main bar of a box rigid frame.

5 and 6 show the engagement means 15 of the upper and lower unit bodies 10.
FIG. 3 is a detailed view of a main part showing the joining means 30 of the unit body 10 in a part where the recessed part 16 and the convex part 17 are fitted.

In FIG. 5 the joining means 30 are shown of the welding type.

Reference numeral 31 in FIG. 5(1) is a joining plate provided on the upper surface of the convex portion 17 of the unit body 10, and is embedded and fixed in the upper surface of the slab 12 by an anchor bolt 32 provided on the lower surface. The other side 33 is a joining plate provided on the outer surface of the lower end facing the recess 16 on the lower side of the upper side wall 11, and is connected to the inner surface of the notch 35 provided facing the recess 16 by an anchor bolt 34 provided on the back side. Recessed and fixed.

FIG. 5(2) shows the structure of the joining means 30 after joining, in which the upper and lower unit bodies are connected to the upper and lower joining plates 33 and 31 after the slab 12 and side wall 11 are fitted at the uneven parts. They are fixedly joined by welding a vertical welding plate 36. After welding the welding plate 36 to both joining plates 31, 33, the notch 35 is filled with mortar 37, and the joining can be completed along the entire joint vicinity of the upper and lower units 10.

In FIG. 6, the joining means 30 is of a sleeve type. In FIG. 6(1), a sleeve 41 having an inner diameter of 35 mm is embedded in the convex portion 17 of the lower unit, supported by reinforcing bars as appropriate. The recess 16 of the upper unit has an end opening 42 of a sleeve 41 embedded in the adjacent protrusion 17 (dotted line).
is coming.

These sleeves 41 are located, for example, at the center of the cross section of the convex portion 17, and are accurately buried so that their open ends touch each other. (2) After the recesses and protrusions of the 100-unit unit are fitted together as shown in the figure, the steel rod 43 is inserted through one end of the unit 10, and grout 44 is injected into the space within the sleeve 41. As a result, the joining means 30 connects the upper and lower units 10.10 by means of the sleeve 41 and the reinforcing bar 43. As the steel rod 43, 22 dragon deformed bars are used.

The operation of the Inorimoto construction method invention can be understood based on the process of constructing a multi-story building using box-shaped block units 10.

The required number of units 10 of the same shape are manufactured from reinforced concrete. In the case of the building shown in Figure 2, 20 compartments are required for the 40 compartmented spaces on each floor of an 8-span, 5-story building. The interior dimensions of the body are the same as the adjacent space. As can be seen in the figure, in the lowest level floor slabs 4 are laid every other span, in the end spans supplementary walls 5 are used, and above this span there are unit units 10 and units above the walls 5. body 1
Cross over 0. In the top layer, slab 2 is placed between unit bodies 10.
It can be seen that the partial unit 3 of type ] is used at the extreme end.

In a standard connection part, each unit body 10 is sequentially stacked over the lower two unit bodies 10, and the concave and convex portions of the engagement means 15 are fitted, and then the joining means 30 is a welding type or sleeve type. Use to combine each retention unit. These connections are made by the joining means 30 described with reference to FIGS. 5 and 6.

In such a laminated building, a frame of a wall structure that is sufficiently rigid in the column direction in the figure is formed by connecting box frames. Even in the span direction, the side walls 11 of each unit body 10 are continuous vertically on the same plane to constitute a sufficient wall structure in the span direction, and even if an opening is provided in a part of the side wall 11 as necessary, the wall structure will not be affected. There is plenty of room for housing units to be placed across adjacent spaces. Furthermore, the upper and lower slabs 12, 13 can also be reinforced in the usual way and provided with openings, making it possible to install a staircase. The staircase may be constructed as a separate independent frame structure.

Sash members such as doorways and windows are installed on the open side surface 14 of each unit body 10. Extending slabs can be installed on the outside of the building by cantilevering the upper and lower slabs, and a design can be adopted to form a hallway or balcony.

Main team ■Visit to the United States The present invention uses a box-shaped block unit, which can be connected to the left and right sides.
When stacking one span vertically and every other floor, each side wall of the unit body and the slab are fitted and engaged at the joint part, and the unit body and the space are arranged alternately. Thus, the frame of a multi-story building can be formed using about half of the units, and there is no waste of overlapping members between unit members, and the number of supplementary members required can be reduced. Moreover,
The unit itself is composed of box rigid frames, and the joining means has an excellent degree of bonding, so even though prefabricated units are laminated, it can be used as a building with a wall structure in both the cross-sectional and longitudinal directions of the unit. A frame with excellent earthquake resistance can be obtained.

In addition, the desired accuracy can be ensured by following the construction procedure without the need for skilled techniques, and the overall construction period can be shortened, leading to lower construction costs.

[Brief explanation of the drawing]

The drawings show examples of the structural members necessary to carry out the construction method of the present invention, and FIG. 1 is a perspective view for explaining a box-shaped block body and its upper and lower engagements, and FIG. 2 is a perspective view of the construction method of the present invention. Figure 3 is a plan view of the standard floor of the building shown in Figure 2, as well as the floors directly above and directly below it; Figure 4 is an explanatory diagram of the reinforcement configuration of the box-shaped block unit; FIG. 5 is an explanatory diagram of a unit joining means, FIG. 6 is an explanatory diagram of another joining means, and FIG. 7 is an explanatory diagram of a frame using a conventional portal unit. 10...Unit body, box-shaped block body 11...Side wall, 12.13...Slab, 14.
... open surface, 15 ... engagement means, 16 ... recess, 17 ... protrusion, 20 ... reinforcing bar,
30...Joining means, 31.33...Joining plate, 36...? Receptive plate, 41...three, 4
3... Steel rod, 44... Grout.

Claims (3)

[Claims] (1) In the prefabricated construction method in which a reinforced concrete multi-story building with a wall structure is constructed by stacking precast concrete units of a size corresponding to the vertical and horizontal frame spans and floor heights of the building, the above units are , is a horizontal box-shaped block in which the upper and lower slabs and a pair of opposing side walls are joined to have a rectangular cross section, and the other pair of side walls are open. Along the joint part, an engaging means is provided in which a continuous uneven portion having a width equal to the thickness of the side wall is formed. These box-shaped blocks are combined into one
On the upper floor, a block body is placed astride the two box-shaped block bodies on the lower floor, and the concave and convex portions are fitted, and the above-mentioned joining means are connected to each other. A layered construction method for buildings, which is characterized in that the building as a whole is combined to form a checkerboard pattern when viewed from the elevation, and is layered while supplementing auxiliary blocks in the empty space of the exterior painting area. (2) The layered construction method according to claim 1, wherein the joining means is a steel material fixed to the block body on the outer surface of the lower part of the side wall and the upper surface of the slab, and these steel materials are joined by welding. (3) The joining means is a through hole in which a sleeve opening toward the recess is embedded in the upper and lower convex portions of the side wall so that they communicate when the convex and convex portions are fitted, and a steel rod is inserted into this through hole. The laminated construction method according to claim 1, wherein the laminated construction method is then bonded by grouting with mortar.