JP2001279828A - Precast concrete member and its connection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of defective section in cylindrical bodies to be charged that is made of vinyl chloride and mounted to an inlet and outlet of a sleeve. SOLUTION: A sleeve 3 whose opening 6 is positioned at a joined end face is mounted to a reinforcement of a concrete member, and a filler cylindrical bodies 9 are demountably mounted to an inlet 7 and an outlet 8 of the sleeve 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a precast concrete member and a joining method thereof.

[0002]

2. Description of the Related Art Reinforced concrete structures require more on-site work than steel frame structures.

In order to save labor in such a work process, a reinforced concrete structure is constructed by using a precast concrete member instead of cast-in-place concrete.

As a method of joining such precast concrete members, for example, a conventional example as shown in FIG. 10 is known. This is because after inserting the reinforcing bar 20 of the other precast concrete member 19 into the sleeve 18 of the one precast concrete member 17 and temporarily joining them, a high-strength non-shrinkage is inserted into the sleeve 18 from the filling material inlet 21. Mortar 22 is filled.

[0005]

However, the above-mentioned method of joining precast concrete members involves a method of joining a pre-cast concrete member in a sleeve while leaving a polyvinyl chloride filling cylinder at an inlet for a binder and an outlet for a binder. Is filled with high-strength non-shrinkable mortar, the filling cylinder itself has a cross-sectional defect, which is a factor that impairs the structural performance of the column. In particular, as shown in (2) in the same figure, core reinforcing bars are arranged near the center of the columns on the lower floors of the super-high-rise building, so that many of the column bases have cross-sectional defects and the building is subjected to earthquake resistance. There is a concern about the effect on performance.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to prevent a vinyl chloride filling cylinder itself attached to an inlet and an outlet of a sleeve from becoming defective in cross section.

[0007]

According to a first aspect of the present invention, there is provided a concrete member in which a sleeve having an opening at a joint end face is attached to a reinforcing bar of a concrete member. 3. The filling cylinder is detachably attached to the inlet and the outlet.
The invention according to claim 1 is characterized in that the precast concrete member is a precast concrete column, a precast concrete wall, or a precast concrete beam, and the invention according to claim 3 is based on claim 1 or 2, Is made of a soft synthetic resin, and the wire is formed by being spirally wound. According to the invention of claim 4, in claim 1 or 2, the filling cylinder is made of a soft synthetic resin, The invention according to claim 5, wherein the filling cylinder is detachably attached to the inlet and the outlet of the sleeve whose opening is located at the joint end face. A precast concrete member is formed, a reinforcing bar of another precast concrete member is inserted into the sleeve, and the filling cylinder is removed and formed. Characterized by filling the consolidating material from caking material for inlet into the sleeve.

After the filling cylinders at the inlet and the outlet are removed, the solidifying material can be filled in the sleeve. Further, when the solidification material is filled in the sleeve after the filling cylinder is removed, since the solidification material injection hole is filled with concrete, no cross-sectional loss occurs.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a precast concrete member of the present invention and a joining method thereof will be described. First, we explain about precast concrete members,
Thereafter, the joining method will be described. FIG. 1 is a longitudinal sectional view of a precast concrete column (hereinafter simply referred to as PC column) as a precast concrete member, and FIG. 2 is a transverse sectional view of the same.

The precast concrete column 1 has an upper portion of a column main bar 2 protruding from the upper surface.
The sleeve 3 shown in (1) or (2) of FIG. 3 is attached. The rebar 5 of another precast concrete member 4 is inserted into the sleeve 3, and the opening 6 is located on the lower surface of the precast concrete column 1.
A filling cylinder 9 is detachably attached to the inlet 7 and the outlet 8. As shown in FIG. 4, the filling cylinder 9 is formed by spirally winding and bonding a vinyl chloride wire 10, and when the end is pulled, the wires 10 are sequentially separated from each other. Therefore, as shown in FIG. 5, when the ends of the filling cylinder 9 at the inlet 7 and the outlet 8 of the sleeve 3 are pulled, the spiral wires 10 are sequentially separated from each other, and the filling cylinder 9 is disassembled.・ Injection port 1 for consolidated material that has been removed
1 and a consolidated material discharge port 12 are formed.

In the above embodiment, a precast concrete column in a precast concrete member has been described, but other precast concrete walls and precast concrete beams have the same configuration (not shown).

FIG. 6 shows a precast concrete column according to the second embodiment. The same components as those of the first embodiment are described with the same reference numerals, and only different components are denoted with different reference numerals. This is a precast concrete column 13 on the lower floor of a super-high-rise building in which reinforcing bars are arranged near the center, and a filling cylinder 9 is buried up to the sleeve 3 at the center. When removed, the inlet 11 for consolidated material and the outlet 12 for consolidated material are easily formed.

FIG. 7 shows that the filling cylinder 9 provided at the inlet 7 and the outlet 8 is formed with a gradually decreasing diameter toward the distal end side, and is made of the same vinyl chloride as described above. The filling cylinder 9 is coated with a release agent on the outer peripheral surface and is formed in a tapered shape toward the sleeve 3 side.
Is easily pulled out and the taper-shaped filler inlet 11 is formed.
And a discharge port 12 for the consolidated material can be formed. Since the filler injection port 11 is tapered, it is characterized in that non-shrink mortar can be filled into the sleeve 3 at high pressure.

Next, a method of joining precast concrete members using the precast concrete columns 1 will be described with reference to FIG. First, a precast concrete column 1 having a filling cylinder 9 detachably provided at an inlet 7 and an outlet 8 of the sleeve 3 is carried into the site.
Then, the reinforcing bar 5 of another precast concrete member 4 is inserted into the sleeve 3 of the precast concrete column 1, and these are temporarily joined. Next, before filling the high-strength non-shrinkable mortar into the sleeve 3, the filling cylinder 9 is dismantled and removed to form a filler inlet 11 and a binder outlet 12. I do. The disassembly / removal of the filling cylinder 9 can be performed before the rebar 5 of another precast concrete member 4 is inserted into the sleeve 3.
Then, the high-strength non-shrink mortar 14 is inserted into the sleeve 3 from the inlet 11 for the binder and the outlet 12 for the binder.
Is filled, the rebars 2 and 5 are joined together, and the precast concrete column 1 is joined to another precast concrete member 4.

FIG. 9 shows a method of joining the precast concrete wall 15 to another precast concrete member 16, which is assumed to be joined in the same manner as described above. In the case of precast concrete beams, they are joined in the same manner as described above (not shown).

[0016]

The filling cylinder can be easily removed from the inlet and the outlet of the sleeve.

After the filling cylinder at the inlet and the outlet is removed, the solidifying material can be filled in the sleeve.

When the solidification material is filled into the sleeve after the filling cylinder is removed, the solidification material injection port and the solidification material discharge port are filled with concrete, so that there is no cross-sectional loss, and structural calculation is performed. Street stable seismic performance can be secured.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a precast concrete column.

FIG. 2 is a cross-sectional view of a precast concrete column.

FIGS. 3A and 3B are cross-sectional views of a sleeve.

FIG. 4A is a perspective view of a filling cylinder, and FIG. 4B is a sectional view of the same.

FIGS. 5A to 5C are cross-sectional views showing how to remove a filling cylinder.

FIG. 6 is a sectional view of a precast concrete column provided with another filling cylinder.

FIG. 7 is a cross-sectional view of a precast concrete column according to another embodiment.

FIG. 8 is a cross-sectional view showing a method for joining precast concrete members.

FIG. 9 is a cross-sectional view showing a method for joining precast concrete members.

FIG. 10 is a cross-sectional view showing a conventional method for joining precast concrete members.

[Explanation of symbols]

 1, 13 PC column 2 Column main bar 3, 18 Sleeve 4, 16, 19 Other precast concrete members 5, 20 Reinforcing bar 6 Opening 7, 21 Inlet 8 Outlet 9 Filling cylinder 10 Wire rod 11 Injection for binder Inlet 12 Discharge port for consolidated material 14, 22 Non-shrink mortar 15 Precast concrete wall 17 Precast concrete member

Claims (5)

[Claims] 1. A sleeve whose opening is located at a joint end face is attached to a reinforcing bar of a concrete member, and a filling cylinder is detachably attached to an inlet and an outlet of the sleeve. Precast concrete parts to be. 2. The precast concrete member is a precast concrete column, a precast concrete wall,
The precast concrete member according to claim 1, which is a precast concrete beam. 3. The precast concrete member according to claim 1, wherein the filling cylinder is made of a soft synthetic resin, and the wire is formed by spirally winding the wire. 4. The precast concrete member according to claim 1, wherein the filling cylinder is made of a soft synthetic resin and has a diameter gradually reduced toward a tip end side. 5. A precast concrete member having a filling cylinder detachably attached to an inlet and an outlet of a sleeve whose opening is located at the joint end face, and another precast concrete member is provided in the sleeve. A method for joining precast concrete members, comprising inserting a reinforcing material into the sleeve and filling the sleeve with a solidifying material from a solidifying material inlet formed by removing the filling cylinder.