KR102116868B1 - Post tension press method for intrusion block of grout in PC joint connection - Google Patents

Abstract

The present invention provides a post-tensioning compression method for blocking insertion of grout injection into a PC joint which prevents grout injected into an interface of a PC joint from intruding into a sheath pipe to facilitate tensile force introduction and tendon penetration into the sheath pipe. According to a proper embodiment of the present invention, the post-tensioning compression method for blocking insertion of grout injection into a PC joint comprises: a step of installing a PC column manufactured by considering a joining connection with a PC beam to vertically install a column sheath pipe on a joint portion including a corbel in a column form and pouring concrete after connecting column-side corrugated pipe connectors to both ends of the vertical column sheath pipe on a slab or a foundation floor plate; a step of preparing a PC beam manufactured by vertically installing a beam sheath pipe in a beam form and pouring concrete after connecting a beam-side corrugated pipe connector to one end of the vertical beam sheath pipe, and then inserting a corrugated pipe for blocking grout insertion into the beam-side corrugated pipe connector; a step of connecting and tensioning a wire for corrugated pipe compression on an end of the PC beam to compress the corrugated pipe for blocking grout insertion into the beam-side corrugated pipe connector; a step of mounting the PC beam on the PC column through the corbel, and loosening and removing the wire for corrugated pipe compression to stretch the compressed corrugated pipe for blocking grout insertion to be extended and arranged from the beam-side corrugated pipe connector to the column-side corrugated pipe connectors; and a step of injecting grout into an interface where the PC column and the PC beam are joined, and then inserting a tendon into the vertical column sheath pipe and the vertical beam sheath pipe and introducing prestress.

Description

Post tension press method for intrusion block of grout in PC joint connection

The present invention relates to a post-tension crimping method of the PC joint, in particular, to prevent the grout injected at the interface of the PC joint into the inside of the sheath tube to facilitate the penetration of the tension member into the sheath tube and the introduction of the tensile force PC joint It relates to a post-tension crimping method to block the introduction of grout injection.

Structural systems using PC members have the advantages of construction safety, durability, high quality, and air shortening, and are currently widely used. In the general PC structural system using a PC member, a PC beam is installed on a PC column made of one-layer units, and after the PC slab is installed on the beam again, the beam-column connection and the beams and the upper reinforcement of the beam and the slab are reinforced and the overlaid concrete is applied in the field. Pours

The details of these joints have the advantage of ensuring the continuity of the beams and the installation of pillars because the upper rebars of the beams are directly reinforced into the joints, but since the lower reinforcing bars of the PC beams are cut off within the joints, post-tension to secure seismic and integrity. The construction method is applied. This post-tension method is to introduce tension into the sheath tube and introduce tension.

However, as the grout injected at the beam-column interface is introduced into the sheath tube during the penetration process of the tension member at the PC beam-column joint, it is difficult to penetrate the tension member (strand) into the sheath tube and introduce tension into the tension member. . Therefore, a solution to this is required.

As a background technology of the present invention, as Korean Patent Registration No. 10-1289934, 'Post-tension compression bonding structure of PC pillar and PC beam and a construction method of the bonding structure' have been proposed. This is a method of constructing a post-tension crimp-type joint structure of a PC column and a PC beam, comprising: installing a PC column at a post position; Mounting a PC beam on a bracket formed on one side of the PC pillar; Installing a post tension in the pillar through hole formed in the PC pillar and the storage through hole formed in the PC beam to generate tension and tension; And pouring concrete into the hollow portion of the PC beam.

However, in the above background technology, when the PC beam is mounted on the PC column, and when the grout is placed at the pillar-beam joint, the grout can penetrate into the sheath tube through which the tension material is inserted. .

Korean Registered Patent Registration No. 10-1289934

The present invention prevents the grout injected at the interface of the PC joint from entering into the sheath tube, and post-tension compression method to block the introduction of grout injection into the PC joint to facilitate the penetration of tension material and introduction of tensile force into the sheath tube. The purpose is to provide.

Post-tension crimp method for blocking the inflow of grout injection into a PC joint according to an appropriate embodiment of the present invention, in consideration of the connection connection with the PC beam in the column formwork, the column sheath pipe is installed up and down in the joint portion including the nose bell. And connecting the pillar-side corrugated pipe connecting ports to both ends of the upper and lower pillar sheath pipes, and then installing the PC pillars produced by pouring concrete on the slab or the base plate; After installing the bosch pipes up and down in the beam formwork, connecting the beam side corrugated pipe connection to one end of the upper and lower bore pipes, equipped with PC beams made by pouring concrete, and then the corrugated pipe for grout entry blocking Inserting; Connecting and tightening the corrugated pipe compression wire to the end of the PC beam to compress the grout inlet corrugated pipe into the inner side of the corrugated corrugated pipe connection; The PC beam is mounted on a PC pillar through a nose ring, and the fixing wire for the compression grout is stretched by dissolving and fixing the wire for compression of the corrugated pipe, thereby extending the extension from the beam corrugated pipe connection to the column corrugated pipe connection; After inserting a grout at the interface where the PC pillar and the PC beam are joined, inserting a tension material into the upper and lower pillar sheath pipes and the upper and lower beam sheath pipes and introducing a prestress; .

In addition, the column-side corrugated pipe connection port and the beam-side corrugated pipe connection port have the same configuration as a sheath pipe connection portion connected to the corresponding sheath pipe, a corrugated pipe casing for receiving and supporting a grout inlet corrugated pipe, and a formwork fixing flange formed at the tip of the corrugated pipe casing. The corrugated pipe connection further comprises a pair of wire hanger pins installed up and down on the formwork fixing flange.

In addition, the corrugated pipe for blocking grout is characterized in that it has the same diameter over the entire length or a relatively large diameter in the central portion by a certain section.

In addition, at the end of the PC beam where the beam-side corrugated pipe connection port is installed, it is characterized in that a wire fixture for connecting and releasing one end and the other end of the wire for compressing the corrugated pipe is installed at two places.

According to the post-tension crimping method for blocking the inlet of grout injection into the PC joint of the present invention, the corrugated pipe for grout inlet blocking installed in the PC beam before being compressed is compressed by a wire for compressing a corrugated pipe and contracted into a corrugated pipe connection, PC After mounting the beam, the wire for compressing the corrugated pipe is released to extend the corrugated pipe for blocking grout inlet into the corrugated pipe connection port on the opposite side of the PC, thereby preventing the grout injected at the interface of the PC joint from entering the sheath pipe. Therefore, it has the advantage that there is no difficulty in penetration of the tension material into the inside of the sheath tube for post tension and introduction of the tensile force.

The following drawings attached in this specification are intended to illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the present invention, so the present invention is only described in the accompanying drawings. It should not be interpreted as limited.
1 is a state diagram of the PC beam mounted on the PC pillar according to the post-tension crimp method according to the present invention.
Figure 2 is a perspective view of one end of a PC beam applied to the present invention.
Figure 3 (a), (b), (c) is an elongation state when removing the wire for compressing and compressing and removing the corrugated pipe before compression of the corrugated pipe for blocking grout according to the present invention.
Figure 4 is a state that the PC beam is mounted on the PC pillar in the compressed state of the corrugated pipe for grout inlet applied to the present invention.
5 is a perspective view of a column and beam side corrugated pipe connection port applied to the present invention.
Figures 6a and 6b is a lifting and mounting state of the PC beam in the compressed state of the grout inlet corrugated pipe.
Figure 7 is a state in which the corrugated pipe for the grout inlet block is expanded while the PC beam is mounted on the PC pillar according to the post tension compression method according to the present invention.

The present invention will be described in detail below with reference to the embodiments presented in the accompanying drawings, but the presented embodiments are illustrative for a clear understanding of the present invention and the invention is not limited thereto.

First, as shown in FIG. 1, the PC pillar 10 is manufactured and installed on the slab 5 or the base bottom plate. The PC pillar 10 installs the upper and lower pillar sheath 12 at the joint portion including the nose bell 101 in consideration of the joint connection with the PC beam 20 in the pillar formwork, and the upper and lower pillar sheath pipe 12 ) Is made by pouring concrete after connecting the corrugated pipe connecting ports 14 to each end of each column.

3 and 5, the column-side corrugated pipe connection port 14 is a corrugated pipe casing 142 for receiving and supporting a sheathed pipe connecting portion 141 connected to the upper and lower column sheathed pipes 12 and a grout inlet corrugated pipe 30 ), Has a formwork fixing flange 143 formed on the tip of the corrugated pipe casing 142.

Then, as shown in FIGS. 1 and 7, the PC beam 20 to be mounted on the PC pillar 10 is manufactured. The PC beam 20 is produced by installing the beam sheath tube 22 up and down in the beam formwork, connecting the beam side corrugated pipe connector 24 to one end of the upper and lower beam sheath tube 22, and pouring concrete do.

5, the beam-side corrugated pipe connector 24 has the same configuration as the column-side corrugated pipe connector 14, but further includes a pair of wire hanger pins 144 installed up and down on the formwork fixing flange 143. Have

Then, as shown in (a) of FIG. 3, the grout inlet corrugated pipe 30 is inserted into the corrugated pipe connection port 24.

The grout inlet corrugated pipe 30 is made of a synthetic resin material and may have the same diameter over the entire length or a relatively large diameter at a central portion. As described above, since the corrugated pipe 30 for blocking grout is made of a synthetic resin material, compression is possible, and elongation is restored by repulsive force after compression. At this time, the diameter of the corrugated pipe 30 for blocking grout is configured to be smaller than the inner diameter of the corrugated pipe casing 142 on the side corrugated pipe connection port 24 or the corrugated pipe connection port 14 side.

Next, the corrugated pipe compression wire 40 is connected to the ends of the PC beam 20 as shown in FIGS. 3 (B) and 4 and the grout inlet corrugated pipe 30 is connected to the complementary corrugated pipe connector 24 It is compressed inside.

At this time, the wire 40 for compressing the corrugated pipe is supported by the wire hanger pin 144 and pulled as shown in FIG. 3 (B), so that the corrugated pipe 30 for blocking grout can be easily compressed. The wire hanger pin 144 is configured in a pin shape, but may be in the form of a screwed bolt.

At the ends of the PC beam 20 where the beam-side corrugated pipe connecting ports 24 are installed, a wire fastener 60 is provided as a means for connecting and releasing one end and the other end of the wire 40 for compressing the corrugated pipe in two places. In the present embodiment, the wire fixture 60 is composed of bolts that are screwed, but is not limited to these bolts. Therefore, when the fixing force of the wire fixture 60 is released, the compressive force of the wire 40 for compressing the corrugated pipe can be removed.

Then, the PC beam 20 is mounted on the PC pillar 10 through the nosebell 101, and the wire 40 for compressing the corrugated pipe is released and disassembled. Therefore, as shown in Fig. 3 (c), the compressed grout inlet corrugated pipe 30 is extended to extend from the complementary corrugated pipe connection port 24 to the columnar corrugated pipe connection port 14.

Then, after the grout is injected into the interface where the PC pillar 10 and the PC beam 20 are joined, the tension material 50 is applied to the upper and lower pillar sheath pipes 12 and the upper and lower beam sheath pipes 22. After inserting and introducing prestress, post-tension crimping occurs at the PC joint.

Here, as the grout is injected, since the corrugated pipe 30 for blocking grout is disposed at the interface where the PC pillar 10 and the PC beam 20 are joined, the upper and lower pillar sheath 12 and the upper and lower boshes Since the penetration of grout into the pipe 22 can be prevented, installation of the tension member 50 and introduction of the tensile force are made smoothly.

The present invention has been described in detail with reference to the presented embodiments so far, but those skilled in the art can make various modifications and modified inventions without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The present invention is not limited by such modified and modified inventions, but is limited by the appended claims.

10: PC pillar
12: Pillar sheath tube
14: Column side corrugated pipe connection
20: PC Show
22: Boshes tube
24: complement side corrugated pipe connector
30: grout inlet corrugated pipe
40: corrugated pipe compression wire
50: tension material

Claims (4)

In consideration of the joint connection with the PC beam 20 in the column formwork, the column sheath tube 12 is installed up and down at the joint portion including the nose bell 101, and the column sides are respectively at both ends of the upper and lower column sheath tubes 12. After connecting the corrugated pipe connection (14), the step of installing a PC pillar (10) produced by pouring concrete into the slab (5) or the base bottom plate;
After installing the beam sheath tube 22 up and down in the beam formwork, connecting the beam side corrugated pipe connector 24 to one end of the upper and lower beam sheath tube 22, and pouring the concrete to cast the PC beam 20. Provided, and then inserting the grout inlet-out corrugated pipe 30 into the complementary corrugated pipe connector 24;
Compressing the corrugated pipe compression wire (40) to the end of the PC beam (20) and compressing the grout inlet corrugated pipe (30) into the complementary corrugated pipe connection (24);
The PC beam 20 is mounted on the PC pillar 10 through the nosebell 101, and the fixing of the corrugated pipe wire 40 is released and disassembled, so that the compressed grout inlet corrugated pipe 30 is stretched and the complementary corrugated pipe Extending from the connector 24 to the pillar-side corrugated pipe connector 14;
After the grout is injected into the interface where the PC pillar 10 and the PC beam 20 are joined, the tension member 50 is inserted into the upper and lower pillar sheath 12 and the upper and lower beam sheath 22. Laying and introducing a prestress; Post tension compression method to block the introduction of grout injection to the PC junction, characterized in that construction. According to claim 1,
The column-side corrugated pipe connection port 14 and the beam-side corrugated pipe connection port 24 include a sheath pipe connection portion 141 connected to a corresponding sheath pipe, a corrugated pipe casing 142 for receiving and supporting a grout inlet corrugated pipe 30, a corrugated pipe casing 142 ) Has the same configuration as the flange 143 for fixing the formwork formed at the tip,
The post-side crimp tube connection port 24 comprises a pair of wire hanger pins 144 installed up and down on the formwork fixing flange 143, and post-tension compression method for blocking the introduction of grout injection into the PC junction. According to claim 1,
The grout inlet corrugated pipe 30 has a same diameter over the entire length or has a relatively large diameter as a certain section in the central portion. According to claim 1,
A PC characterized in that a wire fixture 60 for connecting and releasing one end and the other end of the wire 40 for compressing the corrugated pipe is installed at two ends at the end of the PC beam 20 in which the corrugated pipe connection port 24 is installed. Post-tension crimping method that blocks the introduction of grout injection into the joint.

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