JPH06280315A - Joint of precast concrete member and its joint member - Google Patents

Abstract

PURPOSE:To joint precast concrete members with each other easily by jointing them through a connection material in a member of the precast concrete members. CONSTITUTION:By forming a reinforcing steel cage of a main reinforcement and a shearing reinforcing bar, a connection material 2 is made. A coupler is made by accumulating a column main enforcement 3e of both of precast concrete column members 3 and a main enforcement of the connection material 2. Thereafter, in a joint part of these precast concrete column members 3, mortar is inserted with pressure. Consequently, it is possible to fully precast a column and joint a precast concrete wall without using a mechanical coupler, to reduce cost, to improve workability and to save professional engineers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining precast concrete members and a joining member.

[0002]

2. Description of the Related Art In recent years, precasting of building members has been promoted due to an extreme shortage of manpower and efficiency of workability. In this precast member, when the columns are made of so-called full precast concrete, or when the precast concrete columns are joined together, the column main bars are connected by mechanical joints or welding.

[0003]

However, when the mechanical joint is used for joining the column main bars as described above, it is necessary to check the dimensions in detail at the stage of designing and processing the column main bars, and at the joint site. Precision was also required in terms of construction, such as the need to carefully finish the top of the poured concrete. In addition, this type of mechanical coupling is expensive, and there is an economical and time constraint that it must be done by a specialist. The present invention has been made in view of the above problems, and an object thereof is to provide a method for easily joining precast concrete members together and a joining member thereof.

[0004]

The gist of the first invention for solving the above problems is to join precast concrete members to each other through a connecting member embedded in both of these precast concrete members. The present invention resides in that mortar is injected between the joints, and the gist of the second invention is that a connecting main bar projects from the joint end of one precast concrete member and the joint of the other precast concrete member. It consists in filling the fitting hole provided in the end portion with mortar and fitting the connecting main bar into the fitting hole to join them together. Further, the gist of the third invention resides in that the precast concrete member is embedded by being embedded in the precast concrete member, and the main bar and the shear reinforcing bar are arranged in the concrete body.

[0005]

In the first aspect of the present invention, by joining the precast concrete members to each other through the connecting member, the precast concrete columns can be joined to each other and the full precast concrete columns can be easily produced. Further, in the second aspect of the present invention, the connecting main bar is projected from the joint end of one precast concrete member, and the fitting hole provided at the joint end of the other precast concrete member is filled with mortar, By fitting the connecting main bars into the holes and joining them together, the precast concrete columns can be joined together and the full precast concrete columns can be easily manufactured as in the first aspect of the invention. Further, the joining member according to the third aspect of the invention is also embedded in the precast concrete member to easily join the precast concrete member.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a cross-sectional view of a so-called full precast concrete pillar 1, in which a precast concrete pillar member 3 is connected by a connecting member 2 which is embedded so as to straddle them, and the connecting member 2 is a pillar. It is formed by being embedded inside the main bar. The connecting member 2 is a rebar cage 2c composed of a main bar 2a and a shear reinforcing bar 2b, and the main bar 2a is lap jointed with the column main bars 3e of both precast concrete column members 3. Further, the connecting member 2 is not limited to the above-mentioned rebar cage 2c, but a square steel pipe 2d or an H-shaped steel 2e as shown in (1) and (2) of FIG. 4, or a precast having a main bar and a shear reinforcing bar. It is also possible to use a connecting material made of.

As shown in FIG. 5, the method of manufacturing this full precast concrete pillar 1 is such that a fitting hole 3a is formed at the joint end.
Manufacturing a precast concrete pillar member 3 equipped with
The connecting member 2 is fitted into the fitting hole 3a. Then, the connecting material 2 is fitted into the fitting hole 3a of the other precast concrete pillar member 3 and the mortar 3b is press-fitted into the joint portion to join the full precast concrete pillar 1.

Therefore, the joining method of the present invention is performed by joining the precast concrete pillar members 3 to each other as described above, in addition to the production of the full precast concrete pillar 1,
Precast concrete columns for construction of building frame 1
It can also be used to assemble and join precast concrete walls.

FIG. 6 shows another embodiment of the joining method. One of the precast concrete column members 3 is shown in FIG.
The connecting material 2 is previously inserted into the inserting hole 3a of the mortar 3b and fixed with the mortar 3b. It is to join.

Further, FIG. 7 shows another embodiment of the joining method, in which a precast concrete pillar member 3 having a reinforcing rod cage 3c protruding from the joining end is manufactured, and the precast concrete rod member 3c is precast. The connecting member 2 made of steel is inserted, the connecting member 2 is covered with the reinforcing rod cage 3c of the other precast concrete pillar member 3, and the joint portion is covered with the mortar 3b or the like and joined.

FIG. 8 is a sectional view of the joining method according to the second aspect of the present invention, in which the connecting main bar 3d protruding from the joining end of one of the precast concrete pillar members 3 is shown.
Is embedded in the mortar 3b of the fitting hole 3a of the other precast concrete pillar member 3 and is connected by the mortar 3b flowing out between these joints. As shown in FIG. 9, the connecting main bar 3d protruding from the joining end is arranged inside the column main bar 3e of the other precast concrete column member 3 and is lap jointed.

In this joining method, as shown in FIG. 10, a precast concrete pillar member 3 having connecting main bars 3d protruding from the joining end portion and a precast concrete pillar member 3 having a fitting hole 3a at the joining end portion. Are manufactured, and the fitting hole 3a is filled with mortar 3b in advance. The connecting main bar 3d is formed so that it can be inserted into the fitting hole 3a.

Next, when the connecting main bar 3d is fitted into the mortar 3b of the fitting hole 3a, an amount of mortar 3b corresponding to the volume of the connecting main bar 3d overflows and flows out between the joints. Both precast concrete pillar members 3 are joined. Further, the joining method of the second invention can also be used for assembling the precast concrete columns in the construction of the building frame and for joining the precast concrete walls in addition to the production of the full precast concrete columns as in the first invention. .

Further, FIG. 11 shows that a connecting main bar 3d is separately provided inside the column main bar 3e of the precast concrete column member 3, and this connecting main bar 3d is several ranks smaller than usual as shown in FIG. Bundling muscle 4 that binds rebar of diameter
Can also be used. Further, FIG. 13 shows that the fitting hole 3a is formed by a necessary width into which the connecting main bar 3d is inserted. (1) shows the connecting main bar 3d as a normal main bar,
(2) is a binding bar 4 in which small diameter reinforcing bars are bound.

FIG. 14 shows a joining member 5 of the precast concrete member of the third invention, which is formed by arranging a main bar 6a and a shear reinforcing bar 6b in a concrete body 6. . The shape of the joining member 5 is determined according to the precast concrete member to be joined. For example, the joining member 5 of FIG. 14 is used for joining a precast concrete column, and the joining member of FIG. 5 is used for joining precast concrete walls.

When the joining member 5 is used for joining precast concrete columns,
It is used in the same manner as the first invention shown in FIGS. 5, 6 and 7.

Further, FIG. 16 is used for joining the precast concrete walls 7, and in this case also, the same method as the joining of the precast concrete columns is performed.

[0018]

Since the columns can be fully precast and the precast concrete walls can be joined without using mechanical joints, the cost can be reduced, the workability can be improved, and the labor required by specialists can be reduced.

Since there is no reinforcing bar joint in the hinge region of the leg, it can be used for the first floor pillar.

Except for the column base portion where the stress is large, it is possible to assemble the column reasonably in structure and construction in a place where the stress is small.

By using the joining member of the present invention,
Can easily join precast concrete columns and precast concrete walls.

[Brief description of drawings]

FIG. 1 is a perspective view showing a joined state of precast concrete pillar members.

FIG. 2 is a sectional view taken along line aa of FIG.

FIG. 3 (1) is a front view of a connecting member, and FIG. 3 (2) is a plan view thereof.

4 (1) and (2) are plan views of another connecting member.

5 (1), (2) and (3) are perspective views showing a method for joining precast concrete pillar members.

FIG. 6 is a perspective view showing another joining method of precast concrete pillar members.

7 (1), (2) and (3) are perspective views showing another joining method of a precast concrete pillar member.

FIG. 8 is a perspective view showing a joined state of the precast concrete column member in the second invention.

9 is a sectional view taken along line bb of FIG.

FIG. 10 is a perspective view showing a state in which a connecting main bar is fitted into a fitting hole.

FIG. 11 is a perspective view of a precast concrete column member having another connecting main bar projecting therefrom.

FIG. 12 is a cross-sectional view in which a binding muscle is fitted into a fitting hole.

13A and 13B are cross-sectional views showing another embodiment of the fitting hole.

FIG. 14 (1) is a perspective view of a joining member, and FIG. 14 (2) is a sectional view of the same.

15A is a perspective view of another joining member, and FIG. 15B is a cross-sectional view thereof.

FIG. 16 is a perspective view of a joining member used for joining a precast concrete wall.

[Explanation of symbols]

 1 Precast concrete column 2 Connecting material 2a, 6a Main reinforcement 2b, 6b Shear reinforcement 3 Precast concrete column member 3a Fitting hole 3b Mortar 3e Column main reinforcement 6 Concrete body

Claims (3)

[Claims] 1. The precast concrete members are
A method for joining precast concrete members, characterized in that the precast concrete members are joined together via a connecting material embedded in the precast concrete members, and mortar is injected between the joining portions. 2. A pre-cast concrete member is provided with a connecting main bar projecting from a joining end thereof, and a fitting hole provided at the joining end of the other pre-cast concrete member is filled with mortar. A method for joining precast concrete members, characterized in that the connecting main bars are fitted and joined together. 3. A joining member for a precast concrete member, which is embedded in a precast concrete member and joins the precast concrete member, wherein a main bar and a shear reinforcing bar are arranged in the concrete body.