JPS62133237A - Precast structural member - 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 "Field of Industrial Application" This invention relates to precast structural members used as beams and beams in buildings.

"Prior Art" Precast concrete members have traditionally been used as structural members, ie, beams and columns, that form the framework of buildings. According to this, high-strength parts can be manufactured by autoclave curing in factories,
The framework can be constructed by transporting these members to the site and assembling them.

``Problems to be solved by the invention'' By the way, conventional precast concrete members are integrally molded in advance to the length of the span for beams, and the length of the floor height for columns, so generally the length of several meters is becomes the length,
In addition, since they are heavy, large trucks and cranes are required for transporting them and lifting them on site, and they are difficult to handle.

This invention was made in view of the above circumstances, and an object of the present invention is to provide a precast member that has high strength like conventional precast members and can be easily handled.

"Means for Solving the Problems" This invention consists of a core member that serves as the core of a beam or house, and a plurality of precast block sets attached in parallel in the length direction of this core member. Each precast block set is made by connecting a plurality of unit blocks so as to surround the core member, and prestress is introduced into the series of precast block sets arranged in the length direction of the core member. It is characterized by

Embodiment J An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 show an example in which the precast structural member of the present invention is applied to a beam, and FIGS. 1 and 2 are schematic configuration diagrams of this beam member I, and FIGS. FIG. 4 is a diagram showing the construction procedure for constructing the framework of a building using this beam member l.

In these figures, the reference numeral 2 represents a core member made of square steel. As shown in FIG. 3, this core member 2 has both ends connected to pillars C1.
The beam member 1 is connected to the beam member 1, and the frame is used by being passed between the columns C1C, but it does not need to have sufficient strength as a structural member, and may have a small cross section with enough rigidity to support the weight of the beam member 1 itself.

A plurality of precast block sets 3 are attached to the core member 2 in a manner that they are lined up without gaps in the longitudinal direction thereof. Each of these precast block sets 3... has two unit blocks 4゜4 surrounding the core member 2, and a plurality of (in this embodiment, four each at the top and bottom of the unit block 4, and four at the center). They are connected by two bolts 5 (total of 10). A recess 4a is formed in the unit block 4, and the core members 2 are positioned in this recess 4a and are arranged to face each other.

The two bolts 5 at the center are inserted through holes 2a formed in the core member 2. Then, the recess 4a of the unit block 4 is filled with grout 6 such as mortar, and this grout 6 allows the core member 2 to
and precast block set 3 are integrated. The above unit block 4 is manufactured by autoclave curing in a factory, and has a much higher compressive strength than ordinary concrete.

In addition, each of the unit blocks 4 has a plurality of PC steel wire insertion holes 7 (in this embodiment, two each in the upper and lower parts).
... is provided, and this PC steel wire insertion hole 7...
PC steel wires 8 are passed through the precast block sets 3, which are arranged in series as described above, and are connected to each other in the length direction of the beam member l. This PC
The steel wires 8 are tensioned and fixed at both ends, thereby introducing prestress into the series of precast block sets 3.

Based on the above configuration, this beam member I can be formed by attaching the unit block 4 to the core member 2 on site, and therefore, it is easier to transport and lift than when using a conventional integrally molded precast member. Heavy work is extremely easy. Also, once assembled, it has extremely high rigidity, similar to conventional prestressed precast beams. Furthermore, if the dimensions of the unit blocks 4 are standardized and mass-produced, and the number of precast block sets 3 is increased or decreased depending on the length of the beam, the beam member l can be made inexpensive.

Next, the procedure for constructing the framework of a building using the beam member I having the above-mentioned configuration will be explained with reference to FIGS. 3 and 4. First, as shown in FIG. 3, a column C1C made of H-shaped steel is erected at a predetermined position, and the core member 2 is passed over the frame at a position where the beam of this column C1C is to be joined. A hole 9 for passing the PC steel wire 8 is pre-drilled in the flange CI of this column C.

Then, as shown in FIG. 4, two matching unit blocks 4 are tied together so as to enclose the core member 2 and connected by bolts 5..., and the PC steel wire insertion holes of the unit blocks 4 are connected. Pass the PC steel wire 8... through 7.... Alternatively, the PC steel wire 8 may be inserted after all the precast block sets 3 are attached over the entire length of the core member 2. After the precast block set 3 is attached over the entire length of the core member 2 in this way, the PCM wire 8 is tensioned (-next tensioned) from its end, and the recess 4a of the unit block 4 is Fill the surrounding area with grout 6. In order to fill this grout 6, the flange C of the predetermined unit block 4 or column C is
A grout injection hole may be made in I. Then, the PC steel wire 8 is further tensioned (secondary tension), the tension is adjusted, and the PC steel wire 8 is fixed to the flange C3.
Inject the B wire insertion hole 7 into the routing and connect the PC steel wire 8 and P.
Fill the gap between the CM wire insertion holes 7. As a result, the beam member 1 is rigidly joined to the support member C, and a rigid frame structure is constructed.

After that, although not shown in the drawings, the beam members are attached in the same manner as above in the direction perpendicular to the plane of the paper, and the beam members are also attached to the upper floors in sequence, so that the entire frame can be constructed.

In addition, in the above, PC1i is set at both ends of each beam member l.
Although the i-line 8 is fixed, the PC steel wire 8 may be passed through a series of beam members 1 and fixed on the outer wall of the building. Moreover, the column C is not limited to H-beam steel.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

For example, the core member 2 is not limited to the shape steel, but may be a shape steel of an appropriate shape, or a steel plate as shown in FIG.
Furthermore, two or more core parts 2 may be used as shown in FIG. 6L. Furthermore, each precast block set 3 may be constructed by connecting two or more unit blocks.

Also, the above explanation was applied to beams, but
Of course, the same method as shown in FIG. 7 can be applied to columns as well.

``Effects of the Invention'' As explained in detail above, according to the present invention, since the unit blocks are connected and staggered so as to surround the core member, lifting work and assembly work can be easily performed on site. Furthermore, since prestress is introduced, it is possible to obtain a member with sufficiently high rigidity.

[Brief explanation of drawings]

1 to 7 are diagrams showing embodiments of the present invention. 1 and 2 show a schematic configuration of an embodiment in which the present invention is applied to a beam member, and FIG. 1 is a perspective view, and FIG.
The figure is a side sectional view. Figures 3 and 4 are diagrams for explaining the construction procedure using the beam members of this example, and Figure 3 shows the state in which the core members are attached between the pillars. 4 is an elevational view, (b) is a plan view, and FIG. 4 shows a state in which the precast block assembly is attached to the core member, of which (a) is an elevational view and (b) is a plan view. FIGS. 5 and 6 are side sectional views respectively showing other configuration examples when applied to a beam. FIG. 7 is a plan sectional view showing an example of the configuration when applied to a column. 1... Beam member (precast structural member), 2...
...Core member, 3...Precast block assembly,
4...Unit block, 8...PC steel wire. 4a4a'8 Figure 3 (B) Figure 4 (A) Figure 5

Claims (1)

[Claims] It consists of a core member that serves as the core of a beam or column, and a plurality of precast block sets installed in line in the length direction of this core member, and each precast block set has a plurality of unit blocks surrounding the core member. A precast structural member, characterized in that the precast block assembly is connected to the core member in a longitudinal direction thereof, and a prestress is introduced into a series of precast block sets arranged in the length direction of the core member.