KR100957850B1 - Connection method for precast concrete member - Google Patents

Abstract

PURPOSE: A connection method for a precast concrete member is provided to stably connect precast concrete members without restricting the rotation of the members. CONSTITUTION: A precast concrete member comprises an inner joint surface(111,211) and an outer joint surface(112,212) of a hinge joint(110,210). The inner joint surface comprises a curved surface joint and a curved surface protrusion. A dead anchor block is embedded in the curved surface joint, and all sides of the dead anchor block are exposed. An insert hole is formed in the curved surface protrusion.

Description

CONNECTION METHOD FOR PRECAST CONCRETE MEMBER}

The present invention relates to a method of connecting a precast concrete member. More specifically, the present invention relates to a method of connecting precast concrete members to connect the precast members to each other to construct a finished concrete structure.

Precast method and cast-in-place method are mainly used for the production of concrete members.

First, the site casting method is to install a temporary facility, such as clubbing, scaffolding, according to the shape and location of the structure to be installed in the site, and construct the final concrete structure through concrete placement and curing inside the formwork.

However, this method involves the installation and dismantling of the temporary facility, placing and curing of concrete, reinforcement work of the rebar, there was a problem that the quality and construction management is difficult.

However, such a site casting method can be said to be a method that is widely used in recent years, because the cost can be reduced, especially in the case of the construction of large-scale structures.

On the other hand, in the precast method, it is common to construct a precast concrete member in advance according to the shape and size of the structure in advance, and transport the same to the site to connect the precast concrete members to each other.

At this time, the method of connecting the precast concrete member is used a variety of methods, the most commonly used is a mechanical fastening method using an anchor bolt and a nut.

For example, a connector 10 for connecting concrete parts is shown in FIG. 1.

The first and second concrete parts PC1 and PC2 to which the connector 10 is mounted are precast concrete parts for constructing concrete structures such as waterways and retaining walls.

The connector 10 is connected to the first concrete part PC1 and the second concrete part PC2 by the male coupler 11, the female coupler 12, the stopper 13, and the fixing screw 14. have.

Looking at the connection method in detail as follows.

That is, when the first concrete part PC1 and the second concrete part PC2 are connected to each other, the connection surface PC1a of the first concrete part PC1 and the connection surface PC2a of the second concrete part PC2 are illustrated. Combine through the omitted packing.

In this case, since the positions of the recesses FP1 of the first concrete part PC1 and the recesses FP1 of the second concrete part PC2 are substantially coincident with each other, the joint surfaces PC1a and PC2a are combined with each other. In this state, the axis CL1 of the male screw portion ET1 exposed in the recess FP1 and the axis CL2 of the male screw portion ET2 exposed in the recess FP2 are substantially straight.

Next, in the state where the male coupler 11 is held at the fingertip, the female coupler 12 is turned to the fingertip, and the female screw hole 12a is screwed into the male threaded portion 11a of the male coupler 11.

In this way, in the state where the screwing by the fingertip became difficult, the tool engagement part of the female coupler 11 was hold | maintained by engaging the fastening tool suitable for this to the tool engagement part 11e of the male coupler 11. Engage the fastening tool suitable for this to (12e) to continue screwing the female coupler 12 to the male coupler 11.

As a result, a pulling force indicated by a thick arrow is applied to the connecting rod CR1 of the first concrete part PC1 through the male coupler 11, and is hooked to the female coupler 12 and the stopper part 12c. A pulling force indicated by a thick arrow is applied to the connecting rod CR2 of the second concrete part PC2 through the fitted stopper 13 to connect the connection surface PC1a of the first concrete part PC1 and the second concrete part ( The connection surface PC2a of the PC2) is press-contacted through the packing, and the first concrete part PC1 and the second concrete part PC2 are connected as they are in the press-bonded state.

An annular gap (free space) exists between the insertion hole 12b of the female coupler 12 and the male screw portion ET2 inserted into the insertion hole 12b. Can be finely adjusted in the direction orthogonal to the axis CL2 of the male screw portion ET2, so that the axis of the male screw portion ET1 in the state where the first concrete component PC1 and the second concrete component PC2 are combined, Even when there is a deviation between CL1) and the axis CL2 of the male screw portion ET2, the female coupler 12 to the male coupler 11 can be properly screwed using the above margin.

Further, the amount of movement of the female coupler 12 at the time of screwing is restricted by the stopper portion 12c in contact with the stopper 13, and the stopper 13 is connected to the connecting rod ( It is fixed to the male screw portion ET2 of the CR2, and through the locking means 16 of the fixing nut cap 160a, it is possible to completely prevent the fixing screw 14 or the press-fit pin 15 from being pulled out.

In addition, after the screw coupling operation of the female coupler 12 with respect to the male coupler 11 is completed, the lock nut RN on the male coupler 11 side is tightly tightened using a fastening tool such as a wrench and the coupler 11. At the same time, the lock nut RN on the female coupler 12 side is tightly tightened using a fastening tool such as a wrench to press-fit the female coupler 12.

Next, a hardening material such as an epoxy resin is injected into the space in the connector 10 from the through hole 12d of the female coupler 12, and mortar or the like is formed in the concave portion FP1 and the concave portion FP2 continuous to each other. Fill the hardener.

However, this method of connecting concrete parts may be very effective as a method of integrating concrete parts with each other, but rotation of the connection part may not be possible in some cases because it does not allow rotation of the parts in such a connection part. There may need to be.

Accordingly, the present invention provides a stable precast concrete member connecting method by restraining the rotation of the member while restraining the position of each other in the hinge coupling portion of both members in the connection of the precast concrete member in order to achieve the above technical problem. Its purpose is to provide.

In order to achieve the above technical problem, the present invention

First, in the hinge joints of the upper and lower precast concrete members,

In the hinge joint of the lower precast concrete member, the inner joint surface is formed such that a curved joint such as a grooved curved groove is formed, and the outer joint surface extending from the curved joint is tapered continuously with the curved joint to extend upward. ,

In the hinge joint of the upper precast concrete member connected to the lower precast concrete member, the inner joining surface is formed to form a curved protrusion that is completely in close contact with the curved joint, the outer bonded surface extending to the curved protrusion is the curved surface Tapered continuously with the protrusions so as to extend upwards so that the outer joining surfaces of the members are spaced apart,

A dead anchor block is buried in the curved joint to form an upper portion of the curved joint, and a curved protrusion is formed in the curved protrusion so as to be inserted into the dead anchor block so that the insert hole extends to the outer surface or the inner surface of the member. One end of the anchor body is inserted and fixed to the insert, and the other end is fixed to the outer surface or the inner surface of the upper precast concrete member.

The upper precast concrete member to the lower precast concrete member was to be rotated while restraining the separation and relative displacement of each other in the hinge joint.

Eventually, the members are constrained by the anchor body and the dead anchor block while being restrained to each other, and the members are rotatable by the curved grooves and the curved protrusions, and the curved grooves and the curved protrusions are formed on the hinge joints of both members. It can be seen that.

In addition, the upper and lower members may be a concrete structure that is assembled by being pre-assembled up and down in the ground or ground, such as culverts or tunnel structures, but is not limited thereto.

In addition, the dead anchor block

A buried sleeve embedded in the curved joint and exposed at an upper portion thereof, and having a screw portion formed at an inner side thereof;

A lower support part which is fixed to a screw part at an inner bottom of the buried sleeve;

An elastic spring supported by the lower support part and seated inside the buried sleeve;

It is supported by the lower end of the elastic spring, the wedge portion is fastened to the threaded portion of the upper end of the buried sleeve; so that the end is fixed by the insertion of the anchor body.

According to the present invention, the precast concrete member has a dead anchor block and an anchor body to restrain the displacement and relative displacement inevitably generated during the earthquake at the hinge joint, thereby restraining the position at the curved joint while externally stable rotational connection performance. At the same time, the anchor body also contributes to the horizontal shear reinforcement.

In the hinge joints of the concrete members, the precast concrete members do not restrain rotation from each other, thereby partially canceling the loads of the members acting on each other by the rotation of the members, thereby eliminating the causes of defects in the hinge joints. .

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

First, the connection method of the precast concrete member according to the present invention should be the final construction, the structure may have a rectangular or circular and many other shapes, but in the present invention will be described as a tunnel structure, largely as the upper and lower precast concrete member Based on the case of assembling with each other, the upper part and the lower part are not the concept of position, but are to be divided into two members to be assembled adjacent to the gravitational field.

2 shows a connection state between the lower precast concrete member 100 corresponding to both sidewalls and the upper precast concrete member 200 connected to the upper end of the lower precast concrete member 100. .

Accordingly, the hinge joints 110 (refer to inner and outer joint surfaces) of the lower precast concrete member 100 connected to the lower precast concrete member 100 will be described in order.

First, referring to the hinge joint 110 of the lower precast concrete member 100 with reference to FIG. 2, the inner joint surface 111 is formed with a curved joint A such as a curved groove recessed like a groove. Able to know.

The curved joint portion A such as the curved groove is formed to have a certain curvature, which will be able to be changed in consideration of the cross-sectional size, weight, etc. of the members (100,200).

The inner joining surface 111 and the outer joining surface 112 extending from which the curved joining portion A, such as the curved groove, is formed are extended to the inner joining surface 111, but are continuously tapered from an extension point and extended upward. Will be done.

It can be seen that the outer bonding surface 112 extends to the inner and outer surfaces C and D of the final member 100.

The shape of the joint surfaces 111 and 112 may be referred to to form a supporting joint surface on which the upper precast concrete member 200 may be seated on the lower precast concrete member 100, and the outer joint for initial setting. A portion of the surface 112 may be formed as a support step 113 formed horizontally.

In other words, while supporting the upper precast concrete member 200 on the support step 113 may be to be seated on the lower precast concrete member 100. In addition, in this case, it is formed horizontally so that the water stop (not shown) is densely installed on the support step 113.

In this case, the dead anchor block 300 is buried in the middle of the curved joint portion A such as the curved groove as shown in FIG. 3, and the anchor body 400 is connected to the dead anchor block 300 through the opened upper portion. Be inserted and fixed.

The dead anchor block 300 may be in any form as long as one end of a member such as a rebar and an anchor is inserted into the dead anchor block 300 so as to be fixed in the dead anchor block 300.

For example, the dead anchor block 300 is

A buried sleeve 310 embedded in a curved joint portion A such as a curved groove to expose an upper portion thereof, and having a screw portion 311 formed on an inner surface thereof;

A lower support part 320 fixed to a screw part at an inner lower end of the buried sleeve 310;

An elastic spring 330 supported by the lower support 320 to be seated inside the buried sleeve 310;

And a wedge portion 340 supported at the lower end of the elastic spring 330 and fastened to the screw portion 311 at the upper end of the buried sleeve 310.

The buried sleeve 310 is a cylindrical member having an open upper portion, a thread portion 311 is formed on an inner surface thereof such that the lower support portion 320 and the wedge portion 340 are fastened or adhered to the screw portion, thereby restraining its position. Done.

The lower support portion 320 is fastened to the screw portion 311 formed at the lower end of the buried sleeve 310 to support the elastic spring 330 to be described later while adjusting the height of the lower end of the buried sleeve inside the buried sleeve It may be referred to, and in advance to be fastened to the innermost bottom of the buried sleeve (310).

The elastic spring 330 may be a spring and serves to support the wedge portion 340 to be described later from the bottom.

The wedge 340 is a wedge which is a fixing device for a tension member such as a PC steel wire, which is coupled by an elastic ring 342 wound on a connecting groove formed in the lower portion of the divided fan-shaped section member 341 to be used. When one end of the anchor body to be described later is inserted into the buried sleeve 310 serves to restrain the position of the anchor body while surrounding the anchor body 400.

Here, the buried sleeve 310 may have a variety of shapes for fixing the attachment to the concrete, and additionally, the fixing attachment member with the concrete may be welded to the outer surface of the embedded sleeve.

Until the anchor body 400 is inserted, the wedge portion 340 is not tightly fixed to the screw portion of the buried sleeve, but is set by being spaced slightly from the screw portion 311 while being supported by the elastic spring 330.

Therefore, when one end of the anchor body 400 is inserted through the upper portion of the buried sleeve 310, the lower surface of the wedge portion 340 having a size slightly smaller than the diameter of the anchor body is pushed, which is elastic by this push Each wedge portion 340 temporarily tightened by the ring 342 (elastic rubber band) is opened toward the screw portion, and the wedge portion moves slightly downward to the screw portion, thereby closely contacting the wedge portion. At this time, the anchor body 400 is inserted into the upper surface of the lower end support part 320 while being pressed and fixed by the wedge part.

As a result, the anchor body 400 penetrating the wedge portion 340 tightly fixed to the screw portion is inserted into the buried sleeve so that one end thereof is fixed by the action of the wedge portion 340 being compressed in the buried sleeve. It can be seen.

Next, looking at the hinge joint 210 of the upper precast concrete member 200 with reference to Figure 2 to the inner surface 211 is formed so that the curved projection (B) is completely in contact with the curved joint (A) do.

The curved protrusion (B) is to determine the shape and the degree of protrusion according to the curvature of the curved joint (A) described above, in the case of Figure 2 it is understood that the curved joint and the curved protrusion such as the curved groove is formed in an arc shape Can be.

The inner joining surface 211 and the outer joining surface 212 extending such curved protrusions B are formed to extend from the inner joining surface 211, but also tapered continuously from the time of extension to extend upwards. .

It can be seen that the outer bonding surface 212 extends to the inner and outer surfaces E and F of the member 200.

The shape of the joint surfaces 211 and 212 may be referred to as forming a support joint surface on which the upper precast concrete member 200 may also be seated on the lower precast concrete member 100, and also for initial setting. An end portion of the outer joining surface 212 may be formed as a support step 213 formed horizontally.

Accordingly, the upper and lower precast concrete members 100 and 200 may be supported by the support stepped portions 113 and 213 to be seated with each other.

In this case, it can be seen that the outer joint surfaces 112 and 212 of the upper and lower precast concrete members 100 and 200 are spaced apart from each other. This is because each tapering is formed at a different ratio, which does not prevent the rotation of the members such as preventing the breakage caused by the contact of the members due to the rotation of the curved projection in the curved joint, such as the curved groove described above. This is to avoid.

In this case, an insert hole 230 into which the anchor body 400 may be inserted is formed in the middle of the curved protrusion B so as to correspond to the open upper portion of the dead anchor block 300 as shown in FIG. 3.

The insert hole 230 serves as a passage through which the anchor body 400 is inserted, so that it is important to extend from the curved protrusion B to the inner and outer sides E and F of the upper precast concrete member 200. Is that.

Accordingly, the insert hole 230 is bent as a whole to be bent upward, for example, to extend to the inner and outer surfaces E and F, so that the anchor body 400 inserted therein is inserted into the inner and outer surfaces E and F. It allows you to settle in the surrounding space.

As a result, it can be seen that the upper portion of the dead anchor block 300 is in communication with the insert hole 230, the anchor body 400 is the insert hole in the outer surface (F) of the upper precast concrete member 200 A member having a flexibility (eg, PC strand) to be inserted into the buried sleeve is used so that one end of the anchor body 400 is inserted into the dead anchor block 300 and fixed.

The other end is fixed by the fixing means 410 such as a nut on the outer surface (F) of the upper precast concrete member 200.

4, the position of the upper precast concrete member 200 is firmly fixed by the anchor body from the hinge joint of the lower precast concrete member 100 and restrained based on the X and Y axes.

The curved joint A, such as the curved protrusion B of the upper precast concrete member 200 and the curved groove of the lower precast concrete member 100, can rotate with each other, so that the upper precast concrete member 200 and the lower part are rotated. It can be seen that the precast concrete member 100 can be limited to some extent by the separation distance without being hindered by the separation space of the hinge joint (due to the separation of the outer joint surfaces). have.

Accordingly, the lower precast concrete member 100 can be seen that the upper precast concrete member 200 can be rotated to offset the load according to the degree of rotation when the load action.

1 is a front view showing a connection state of a conventional concrete component.

2 and 3 is an exploded cross-sectional view of the connecting perspective view and the hinge joint of the upper and lower precast concrete members according to the present invention.

Figure 4 is a cross-sectional view of the operation of the upper and lower precast concrete members according to the present invention.

<Brief description of the major reference numerals>

100: lower precast concrete member

200: upper precast concrete member

110,210: hinge joint

111,211: inner joining surface

112,212: outer face

300: dead anchor block

400: anchor body

Claims (1)

In both hinge joints of the precast concrete member, In the hinge joint of the lower precast concrete member, the inner joint surface is formed such that a curved joint such as a grooved curved groove is formed, and the outer joint surface extending from the curved joint is tapered continuously with the curved joint to extend upward. , In the hinge joint of the upper precast concrete member connected to the lower precast concrete member, the inner joining surface is formed to form a curved protrusion that is completely in close contact with the curved joint, the outer bonded surface extending to the curved protrusion is the curved surface Tapered continuously with the protrusions so as to extend upwards so that the outer joining surfaces of the members are spaced apart, A dead anchor block is buried in the curved joint to form an upper portion of the curved joint, and a curved protrusion is formed in the curved protrusion so as to be inserted into the dead anchor block so that the insert hole extends to the outer surface or the inner surface of the member. One end of the anchor body is inserted into the dead anchor block so as to be exposed, and the other end is fixed to the outer surface or the inner surface of the upper precast concrete member. Connection method of the precast concrete member, characterized in that the upper precast concrete member to the lower precast concrete member to allow rotation while constraining the separation and relative displacement of each other in the hinge joint.

Images