JPH06173339A - Constructing method for joining section for column/beam - Google Patents

Abstract

PURPOSE:To promote construction by preventing beam members from being unstably supported with the use of a crane when the beam members are made of precast concrete. CONSTITUTION:A trestle 3 for supporting a beam member 2 temporarily from the upper end surface position of the external beam member 2 consists of a removably projected precast concrete or steel pipe concrete column member 1, and the precast concrete beam member 2. The beam member 2 is mounted on the trestle 3 of the column member 1, to be supported, and an joint section is penetrated with the main reinforcements 21, 22 of the beam member 2 to be arranged, and after that, the beam form 9 of the joint section is assembled on the trestle 3, and concrete is placed, and the work of the joint section is executed. The beam member 2 is supported by the trestle 3 and then, the member 2 is not required to be supported by a crane, and the member 2 is prevented from being unstably supported, and construction is promoted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention forms a joint from a column member made of precast concrete or a steel tube concrete structure and a beam member made of precast concrete.
It relates to a method of constructing a pillar / beam joint.

[0002]

2. Description of the Related Art In a method of constructing a frame from a column member made of precast concrete or steel pipe concrete and a beam member made of precast concrete, the column member is first erected and then the beam member is suspended. The joints are constructed by placing reinforcements and placing concrete into the joints, but in the past, the beam members were supported after being hung up and stabilized by a crane until they stabilize after being suspended. Therefore, it is difficult to secure the stability during this construction, and the beam members are placed in an unstable state for a long time, which poses a risk of work at the joints and the effective operating rate of the crane. Since it will decrease, the progress of construction will decrease.

The present invention has been made in view of the actual situation of a construction method for supporting a beam member by using a crane, and is intended to newly propose a construction method for solving the above problems.

[0004]

In the present invention, a pedestal is detachably provided on the outer periphery of a column member, and a beam member is temporarily supported on this pedestal to eliminate the need for support by a crane. Stabilize and avoid the risks associated with it, and work on the construction progress.

The beam member is suspended after being erected on the column member, placed on the pedestal, and separated from the crane. After the beam member is placed, its main bar is pierced through the joint part, the beam form of the joint part is assembled on the frame, and the joint part is formed by placing concrete.

Since the beam member is placed on the pedestal and is supported by the beam member as it is, it is not necessary to ensure the stability by being supported while being suspended from the crane, and the risk associated with instability is avoided. It In addition, since the crane is separated after the beam member is placed, the operating rate of the crane is increased, and the progress of construction is achieved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing an embodiment.

As shown in FIG. 1, the present invention comprises a pillar member 1 made of precast concrete or a steel pipe concrete structure and beam members 2 made of precast concrete.
This is a method of constructing a joint between a pillar and a beam while the beam members 2 and 2 are supported by a pedestal 3 projecting from the pillar member 1.

When the pillar member 1 is made of precast concrete, as shown in FIG. 4, the pillar member 1 is made to have a solid or hollow cross section in which the main bar 11 and the hoop 12 are embedded, and in the case of a steel pipe concrete structure, as shown in FIG. Pre-filled with steel pipe 13,
Alternatively, it is composed of concrete 14 to be filled later. When the pillar member 1 penetrates the joint as shown in FIGS. 1 to 4, the pillar members 1 and 1 are connected to each other at the position where the joint is removed, and when the beam member 2 penetrates as shown in FIG. It is installed by sandwiching the beam members 2 and 2, and is connected by pouring concrete to the joint.

When the column member 1 penetrates the joint, the connecting rebar 4 which is joined to the lower end main bar 21 and the upper end main bar 22 of the beam member 2 is provided inside the position of the joint, as shown in FIGS. Is pierced and arranged.

The beam member 2 is made of precast concrete having a U-shape or a solid cross-section with a lower end main bar 21 and a stirrup embedded therein, or a solid cross-section with a top main bar 22 further buried as shown in the figure. .

When the pillar member 1 penetrates the joint, the lower end main bar 21 and the upper end main bar 22 project from the end face of the precast concrete to the side of the pillar member 1, and the beam member 2 has the end face as shown in FIGS. 1 and 2. A lower end main bar 21 and an upper end main bar 22 are erected at a distance from the member 1 and are connected to each other by a threaded joint using a connecting reinforcing bar 4 and a coupler 5 which are arranged through the column member 1. The coupler 5 is attached in advance to the ends of the lower end main bar 21 and the upper end bar 22 as shown in FIG. 2, and is rotated after the beam member 2 is installed and connected to the connecting reinforcing bar 4 as shown in FIG.

When the beam member 2 penetrates the joint portion, the lower end main bar 21 and the upper end main bar 22 at the joint part are exposed as shown in FIG. Be streaked. FIG. 6 shows the beam member 2 and its suspended state when the beam member 2 penetrates. When the column member 1 is made of steel pipe concrete, the beam member 2 is manufactured by embedding only the lower end main bar 21 and the stirrup so that the upper main bar 22 is slid after the beam member 2 is installed and penetrates the steel pipe 13. It is also arranged by doing.

As shown in FIG. 1, the pedestal 3 is detachably provided on the outer periphery of the pillar member 1 from the lower end surface position of the beam member 2, and the beam member 2 is hung from the suspension of the beam member 2 to the completion of construction of the joint. Temporary support. As shown in FIG. 4, the pedestal 3 has an area sufficient to support the beam member 2 in two directions and the concrete of the joint, and is divided into an appropriate number of L-shaped or hexagonal units 30.

Each unit 30 is a mounting piece circumscribing the pillar member 1.
31 is joined to the nut embedded in the pillar member 1 by the bolt 6 as shown in FIG. 3, or as shown in FIG. 5, flanges are provided at both ends of the attachment pieces 31, 31 of the adjacent units 30, 30.
32, 32 are formed, and the flanges 32, 32 are connected to each other by bolts 6, or as shown in FIG. 7, bolts are directly attached to the ring stiffener 7 projecting on the outer circumference of the steel pipe 13 for reinforcement of the flanges. By being joined by 6, the pillar member 1 is detachably provided on the pillar member 1. When the pillar member 1 is made of precast concrete, a hard rubber 8 is attached to the surface of the mounting piece 31 that contacts the pillar member 1 as shown in FIG. The gantry 3 also serves as a lower formwork when pouring concrete into the joint, and is detachably provided on the pillar member 1 to be removed after the construction of the joint and diverted.

The construction of the joint is carried out by the pillar member 1 to which the pedestal 3 is connected.
After standing up at a predetermined position on the slab, the beam members 2 and 2 are suspended and supported by the gantry 3, the lower end main bar 21 and the upper end main bar 22 are connected to the connecting rebar 4, and the gantry 3 is connected as shown in FIG. The beam form 9 of the joint is assembled on the top, and concrete is placed in the joint. Lower main bar 21 and upper main bar 22
After connecting, the stirrup is arranged around the lower end main bar 21 and the upper end main bar 22 projecting from the end of the beam member 2, and the slab formwork is assembled on the beam member 2 in parallel with the assembly of the beam formwork 9. And the slab reinforcement is arranged and the joint and slab concrete are placed. When the column member 1 is made of steel pipe concrete, concrete 14 having different strength depending on the required proof strength of the column is separately placed inside the steel pipe 13.

1 to 5 show an embodiment in which the pillar member 1 is made of precast concrete, and FIGS. 7 and 8 show an embodiment in the case of a steel pipe concrete structure. FIG. 5 shows a case where the beam member 2 penetrates the joint. Others show examples in which the column member 1 penetrates.

[0018]

As described above, the present invention is as described above. A frame is detachably provided on the outer periphery of a column member, and a beam main bar is pierced through a joint portion while the beam member is temporarily supported by the frame. Muscle and
Since the joint is formed by pouring concrete, it is not necessary to secure stability by suspending the beam member from the crane, and at the same time, the risk associated with instability can be avoided.

Further, since the operating rate of the crane is increased by separating the crane after the beam member is placed, the progress of construction can be promoted.

[Brief description of drawings]

FIG. 1 is an elevational view showing a erected state of a beam member.

FIG. 2 is an enlarged view of a joint portion in FIG.

FIG. 3 is an elevational view showing a state where the main beam bars are connected to the connecting reinforcing bars.

FIG. 4 is a plan view of FIG.

FIG. 5 is an elevational view showing an embodiment in which a beam member penetrates a joint portion.

FIG. 6 is an elevational view showing how the beam member shown in FIG. 5 is suspended.

FIG. 7 is an elevational view showing an embodiment in which the column member is made of steel pipe concrete.

FIG. 8 is a plan view of FIG.

[Explanation of symbols]

1 ... Column member, 11 ... Main bar, 12 ... Hoop, 13 ... Steel tube, 14 ... Concrete, 2 ... Beam member, 21 ... Lower end bar, 22 ... Upper bar, 3 ... Stand, 30 ...... Unit, 31
...... Mounting piece, 32 ...... Flange, 4 ...... Connecting rebar, 5 ......
Coupler, 6 ... Bolt, 7 ... Ring stiffener, 8 ...
… Hard rubber, 9… Beam formwork.

Claims (1)

[Claims] 1. A method for constructing a joint comprising a beam member made of precast concrete or a steel pipe concrete structure and a beam member made of precast concrete, wherein the beam member is attached from the lower end surface position of the beam member on the outer periphery of the column member. The pedestal for temporary support is detachably overhanging, and after the pillar member is erected, the beam member is placed and supported on the pedestal, and the main bar of the beam member is pierced through the joint to arrange the bar member. A method of constructing a column-beam joint in which the beam formwork of the joint is assembled on top and concrete is placed in the joint to form the joint.