JPS6139453B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for joining precast concrete members and columns, and between upper and lower precast concrete members. The present invention relates to a method for joining a precast concrete member and a column using cast-in-place concrete, and a method for joining precast concrete members disposed above and below each other. A high-rise rigid-frame building is obtained by combining the thus joined structure with a precast concrete floor plate or a cast-in-place concrete floor.

Precast concrete members (hereinafter referred to as PC members) are also used for high-rise buildings because they can be mass-produced with high quality and high productivity. In this case, there are problems with the method of joining the precast concrete member and the cast-in-place concrete column and the method of joining the precast concrete members disposed above and below each other.

In other words, since the joining is done on-site, if a simple joining method is not used, workability will be affected and the high productivity of precast concrete members may not be fully utilized. This is because the overall strength depends on the quality of the joint.

An object of the present invention is to provide a method that can easily connect a precast concrete member to a cast-in-place concrete column and connect precast concrete members disposed above and below each other with sufficient strength.

According to the present invention, the beam portion and the wall portion are vertically formed integrally, and the wall longitudinal reinforcement protrudes from the beam portion,
Precast concrete comprising a cavity that exposes a part of the wall vertical reinforcement at the lower end of the wall portion, a through hole extending in the longitudinal direction of the beam portion, and a main beam reinforcement inserted into the through hole. The members are arranged at intervals and close to each other vertically on one side and the other side of the installation location of the concrete pillar to be constructed by cast-in-place, and the precast concrete member on the one side and the precast concrete member on the other side. A method is provided for interconnecting a precast concrete member and a column made of cast-in-place concrete as well as vertically adjacent precast concrete members. In this method, the beam portion of the other precast concrete member is positioned on an extension of the beam portion of the other precast concrete member, and a part of the beam main reinforcement of the one precast concrete member is arranged. into the through-hole of the other precast concrete member, then place the column formwork at the installation location, pour concrete into the column formwork, and inject filler into the through-hole of each beam part. , thereby joining the precast concrete members on one side and the other side to the concrete column, and on the other hand, the wall longitudinal reinforcement protruding from the lower precast concrete member into the cavity of the upper precast concrete member. and injecting a filler into the cavity, thereby joining both the upper and lower precast concrete members to each other.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the precast concrete member 10 used in carrying out the present invention has a beam portion 12 and a wall portion 11 that are vertically integrally formed, and wall vertical reinforcements 17. A cavity 13 is provided that projects upward from the beam portion 12 and exposes a portion of the wall longitudinal reinforcement at the lower end of the wall portion 11, and the beam portion 12 is provided with a through hole 14 that extends in its longitudinal direction. wall part 11
A window 15 is provided.

The precast concrete member 10 is manufactured in a factory as having the following shape.

As shown in FIGS. 3 and 4, the cavity 13 is provided at a position where a part 16a of the wall vertical reinforcement 16 buried in the precast concrete member 10 is exposed, and is located in the precast concrete member 10, which is to be located downstairs. Wall vertical reinforcement 1 protruding upward from the concrete member
7 can be inserted into this cavity 13, its depth H and size are determined. When the wall longitudinal reinforcement 17 is inserted into the cavity 13, the part 16 of the wall longitudinal reinforcement 16 of the precast concrete member to be located above
a and the wall vertical reinforcement 17 are located close to each other. A number of hoops 18 are wrapped around the wall longitudinal reinforcement 16.

The main beam reinforcement is inserted into the through hole 14. This through hole 14 is preferably formed of a sheath (pipe) having a diameter 5 to 6 mm larger than that of the beam main reinforcement. As shown in FIG. 4, the sheath 19 is placed at the beam main reinforcement position,
The stirrup 21 is wound around the auxiliary reinforcing bars 20 by appropriately arranging them. The main beam reinforcing bars 22 are inserted into the sheath 19 before or after manufacturing the precast concrete member.

The construction method according to the present invention is as follows.

As shown in FIG. 5, main reinforcements 23 are placed at the installation locations of concrete columns to be constructed by on-site casting, and hoops 24 are wrapped around them.
Grip joint 25 connects the main bar 2 of the column below the floor.
Join with 3. Two precast concrete members 10, 10 are placed on one side and the other side of the erection location of this main column reinforcement 23, and the beam part of the other precast concrete member is located on the extension of the beam part of one precast concrete member. One precast concrete member 1
The main beam reinforcing bars 22 inserted into the sheath 19 of No. 0 are pushed through the column and beam joints 26 into the corresponding through holes of the other precast concrete member. In this case, the beam main reinforcement 22 located in the corresponding through hole of the other precast concrete member is also pushed out into the corresponding through hole of yet another precast concrete member by the same operation. The degree of extrusion of the main beam reinforcements should be such that the lengths of the main beam reinforcements on both sides of the column are approximately equal. As a result, as shown in FIG.
This will span 0 and 10. The beam main reinforcing bars 22 and the column main reinforcing bars 23 are appropriately tied together, and then a column formwork is placed around the column main reinforcing bars 23, and concrete is poured into the column formwork. Concrete shall be placed up to the top of the floor.

As a result of pushing out the main beam reinforcement 22 as described above, 1
At approximately the center of the two sheaths 19, as shown in FIG.
It will be provided between the end of the main beam reinforcement 22 pushed in from another precast concrete member and the end of the main beam reinforcement 22 pushed out to the other precast concrete member, but the stress between the reinforcing bars at this interval is is transmitted via the auxiliary muscle 20.
In order to fill the gap L, a hole 2 was previously drilled in the beam part of the precast concrete member.
7 and 28 to inject mortar and other filling materials. For example, if the injected filler is injected through the hole 27 and squeezed out from the other hole 28, the space within the interval L and between the beam main reinforcement 22 and the through hole 14 will be completely filled with the filler. I understand that. This ensures the continuity of the main beam reinforcement.

The precast concrete member 10 is placed adjacent to the installation location of the concrete pillar to be constructed by casting on site, and the precast concrete member 1
After or prior to joining 0 and the cast-in-place concrete column, precast concrete members are placed close to each other vertically. Then, the beam portion 12 of the lower precast concrete member
A wall longitudinal reinforcement 17 protruding from is inserted into the cavity 13 of the precast concrete member located above, and a portion 16 of the wall longitudinal reinforcement exposed in the cavity 13 is inserted into the cavity 13 of the precast concrete member located above.
It is installed in parallel with a. Therefore, if mortar or other filler is injected into this cavity 13 using the hole connected to the cavity 13, and the wall longitudinal reinforcement 17 and the exposed part 16a of the wall longitudinal reinforcement are covered with the filling material. , the cavity is filled with a filling material, and the vertical reinforcements on both walls form a lap joint.

As described above, after the joining of the cast-in-place concrete column and the adjacent precast concrete members and the mutual joining of the precast concrete members placed above and below are completed, the floor is installed, but the floor itself is , may be a precast concrete member floorboard, or may be a cast-in-place floorboard.

By repeating the above operations, a high-rise rigid-frame building can be obtained.

In addition, instead of the above embodiment, the vertical wall reinforcement to which concrete is not attached is exposed through a notch provided at the lower end of the wall portion of the precast concrete member or a hole penetrating the wall portion, and the exposed portion is It is also possible to wrap the wall longitudinal reinforcements protruding from the lower precast concrete member with the filling material. In this specification, the term "cavity" includes notches and holes.

According to the present invention, the beam main reinforcement inserted into the through hole of the beam portion of one precast concrete member penetrates the installation location of the concrete column to be constructed by casting on site, and then penetrates the corresponding part of the other precast concrete member. By inserting it into the hole,
Since the column and the beam are joined, welding work at the column and beam joints is not necessary, and workability is significantly improved. Moreover, the main beam reinforcement can be passed from one precast concrete member to another by simply extruding it, so no skill is required, and the strength of the joint will vary depending on the operator. This does not occur, and a uniform joint can always be obtained. Further, since the ends of the main beam reinforcements in the through-hole and the wall longitudinal reinforcements in the cavity are joined by the filler, the joining is simple and economical.

[Brief explanation of the drawing]

Fig. 1 is a front view of the precast concrete part used in the present invention, Fig. 2 is a side view of the same, Fig. 3 is a front view showing the reinforcement of the precast concrete member, Fig. 4 is a side view of the same, and Fig. 5 is a front view of the precast concrete part used in the present invention. The figure is a reinforcement arrangement diagram of a column, FIG. 6 is an explanatory diagram showing a state in which a main beam reinforcement is passed through a column, and FIG. 7 is a sectional view showing a method of injecting mortar. 10: Precast concrete member, 11:
Wall portion, 12: Beam portion, 13: Cavity, 14: Through hole, 16, 17: Wall vertical reinforcement, 19: Sheath, 22:
Beam main reinforcement.

Claims (1)

[Claims] 1 The beam part and the wall part are integrally formed vertically,
A wall longitudinal reinforcement protrudes from the beam portion, a cavity is provided at the lower end of the wall portion to expose a portion of the wall longitudinal reinforcement, and the beam portion includes a through hole extending in the longitudinal direction thereof, and a through hole is provided in the through hole. Precast concrete members formed by inserting main beam reinforcements are placed at intervals and close to each other vertically on one side and the other side of the installation location of the concrete column to be constructed by cast-in-place, and and the precast concrete member on the other side to the column made of cast-in-place concrete as well as vertically adjacent precast concrete members, the method comprising: The beam portion of the other precast concrete member is arranged so as to be located on the extension of the beam portion, and a part of the beam main reinforcement of the one precast concrete member is inserted into the through hole of the other precast concrete member. and then placing the column formwork at the installation location,
Concrete is poured into the column formwork, and filler is injected into the through holes of each beam section, thereby joining the precast concrete members on one side and the other side to the concrete column, and the other side, Inserting the vertical wall reinforcement projecting from the lower precast concrete member into the cavity of the upper precast concrete member and injecting a filler into the cavity, thereby joining both the upper and lower precast concrete members to each other. , a method for joining precast concrete members to columns and upper and lower members.