KR100622300B1 - Pin connection structure of concrete beam and PC post, and construction method thereof - Google Patents

Abstract

The present invention is to design a precast concrete column on the lower part of the beam at the middle point when designing the concrete continuous beam to facilitate the construction convenience in reinforcing the deflection and stress of the concrete beam as well as to be easily applied to the already constructed concrete building The present invention relates to a pin joint structure of a concrete beam and a precast concrete column, and a construction method thereof.

The present invention comprises a precast concrete column, a concrete beam and grouting material having a dowel bar, and in such a structure precast concrete column in the lower portion of the concrete beam in the concrete structure including the precast concrete structure By pin bonding, concrete beams can be constructed as continuous beams.

According to the present invention, it is possible to install the post supporting the continuous beam after the slab construction to enable parallel construction of the upper and lower layers, and thus the factory in the timing industry where timely launch of new products is important, such as the semiconductor, electronics, and TFT-LCD industries. It is expected that the short-term construction of the building will be possible.

Precast, Concrete Column, Continuous Beam, Joint, Dowel Bar, Pin Joint

Description

Pin connection structure of concrete beam and PC post, and construction method             

1 is a cross-sectional view of an embodiment according to the pin joint structure of the concrete beam and precast concrete support of the present invention.

FIG. 2 is an elevation view (a) and a sectional view (b) of a precast concrete column applied to FIG. 1.

3 is a plan view and a cross-sectional detail view showing a portion to which the joint structure of the concrete beam and precast concrete column of the present invention is applied in a concrete building.

<Description of the symbols for the main parts of the drawings>

100: precast concrete post

110: dowel bar

120: recess 130: fixing groove

200: concrete beam 210: through hole

300: base plate 400: level control

500: grouting material

C: main column B: floor slab

The present invention relates to a pin joint structure of a concrete beam and a precast concrete column, and a construction method thereof. More specifically, the precast concrete column is designed in the lower portion of a beam at an intermediate point when designing a continuous concrete beam. The present invention relates to a pin joint structure of a concrete beam and a precast concrete column, which facilitates construction convenience in reinforcement, and which can be easily applied to an already constructed concrete structure.

Continuous beams are integrally connected to two or more spans (one or more intermediate points), and both ends thereof are simply supported or fixedly supported by columns or girders. Whether both ends are simple support or fixed support is determined by the required structural performance, but it is constructed as fixed support, especially when the design site needs to be constrained to bending rotation. Such continuous beams were constructed from the beginning when constructed, or the simple beams (or continuous beams) of long spans formed intermediate points at predetermined positions of simple beams (or continuous beams) according to structural reinforcement requirements. It can be installed by installing.

On the other hand, in the case of concrete buildings, a wet method that relies on field work is common. This wet method was disadvantageous in that the work quality was large and the construction quality was inconsistent depending on the site conditions. Recently, the dry method of the precast concrete structure, which reduces the field work while maintaining the structural advantages of the concrete tank, has been adopted. The number of applications is increasing. Precast concrete structure (PC structure) refers to a structure in which the main structural member of the building is adopted as a concrete member manufactured at the factory, and brought into the site to be combined with each other in a prefabricated structure to build a building.

Typically, precast concrete beams are designed and constructed as simple beams in precast concrete structures. Because the precast concrete structure is also installed vertically precast concrete pillar first, and then precast concrete beam is bonded between the pillar and the pillar like the construction method of steel structure, which is a general dry method.

However, in this construction method, the precast concrete beam is a post column (referred to as 'holding' in the present invention) that serves to reinforce the deflection and stress of the beam as well as the main column that bears the main load. As the joints are connected at both ends of the transition, the joints of the beams and beams are naturally increased, and thus the amount of field work is increased. In addition, structural examination of the joints (shear joints) is required for the joints between the posts and beams. There was an inconvenience.

In addition, the conventional construction method as described above is because the slab is constructed only after the installation of the main column, the pillar (column) and the beam, when the construction of a plurality of floors is made of a method of sequentially stacking from the lower layer to the upper layer. Bar construction period had a problem extending as the number of floors increased.

Therefore, the present inventors introduced the precast concrete column with a pillar to facilitate the construction of the precast concrete structure or the reinforcement of the already pre-constructed concrete building, and the concrete beam and precast to facilitate the construction of continuous continuous beams. The pin joint structure and construction method of concrete supports were developed.

The present invention has been made to improve the above-described problems, the design of the precast concrete column in the lower part of the middle point when designing the concrete continuous beam to facilitate the construction convenience to reinforce the deflection and stress of the concrete beam, as well as The purpose of the present invention is to provide pin joint structure and construction method of concrete beam and precast concrete column which can be easily applied to constructed concrete structures.

Another object of the present invention is to enable the post supporting the continuous beam after the slab construction to enable the parallel construction of the upper and lower layers to reduce the construction period of the concrete beam and the precast concrete holding pin joint structure and its construction method To provide.

In order to achieve the above object, the present invention is to provide a dowel bar (dowel bar) which is part of the concrete beam and the pin joint structure is installed in the pin joint structure is installed below the middle point, protruding to the top, A precast concrete column installed on the slab; A through-hole is formed at an intermediate position, the concrete beam supported by the precast concrete support while the dowel bar of the precast concrete support is inserted into the through hole; And a grouting material injected into the through-holes of the concrete beams.

In addition, the present invention is to install a precast concrete column in the lower portion of the concrete beam to construct the concrete beam as a continuous beam, the step of constructing a concrete beam formed with a through hole in the intermediate point; Installing a base plate and a level adjuster on the bottom slab at an intermediate position at a predetermined interval; Preparing a precast concrete column formed with a perforation hole at a predetermined depth from an upper portion thereof, and installing the precast concrete column on the base plate to coincide with the through hole of the perforation hole and the concrete beam; Installing a dowel bar in the through-hole of the concrete beam and the perforation hole of the precast concrete column; Adjusting the level adjuster while fitting the verticality of the precast concrete column and pushing the precast concrete column closely to the bottom of the concrete beam; And injecting a grouting material into the space between the through-hole of the concrete beam and the space between the bottom slab and the base plate, thereby providing a construction method of the pin joint structure of the concrete beam and the precast concrete column.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

1 is a cross-sectional view of an embodiment according to the pin joint structure of the concrete beam and precast concrete support of the present invention, as shown in the present invention is a precast concrete support 100, concrete beam (with a dowel bar 110) 200) and the grouting material 500 is configured. As shown in FIG. 3, the concrete beam 200 is continuous by pin-bonding the precast concrete column 100 to the lower portion of the middle beam of the concrete beam 200 in the concrete structure including the precast concrete structure. Can be built.

Precast concrete column 100 is provided with a dowel bar (110) which is partially embedded to protrude to the upper portion as shown in Figure 2, is installed on the floor slab (B) concrete beam (to be described later) By supporting the 200 at its lower portion, the concrete beam 200 enables to be constructed as a continuous beam. Dowel bar 110 is configured to be fixed to the concrete beam 200 located on the precast concrete column 100 as shown in Figure 1 so that the precast concrete column 100 and the concrete beam 200 is pin bonded to each other to be.

The precast concrete column 100 may be configured to include a recess 120 so that the central portion of the upper surface is recessed. When the precast concrete column 100 is bonded by the concrete beam 200 and the Dowwell bar 110 and then the grouting material 500 is injected, the joint of the precast concrete column 100 and the concrete beam 200 is integrated. The recess 120 of the precast concrete holder is configured to increase the integrity of the joint by allowing the grouting material 500 to be filled together.

In the case of applying the present invention to an already constructed building (including a structure that adopts precast concrete beam as concrete beam and pre-constructs it, which will be described later), precast concrete column 100 is drilled to a predetermined depth from the upper surface thereof. Adopt the one made to form the hole. At this time, the dowel bar 110 is embedded in the precast concrete column 100 by inserting the precast concrete column 100 in the drilling hole when the concrete beam 200 is installed below.

The concrete beam 200 is the intermediate point (not necessarily in the middle of the concrete beam, when the continuous beam is designed to be a through hole 210 is formed at the end of the non-both ends of the junction with the precast concrete column) The precast concrete column 100 is positioned at the lower portion thereof, and the dowel bar 110 is inserted into the through hole 210 and is constructed as a continuous beam.

The concrete beam 200 may be a concrete span of the long span in the already structured building, if the structural performance of the long span beam is deteriorated over time, the precast concrete support in the lower concrete beam 200 of the long span By additionally installing (100), it is possible to construct a continuous beam by reinforcing the deflection and stress of the long span beam. At this time, the through-hole 210 is drilled in the concrete beam 200 corresponding to the intermediate point, and the precast concrete column 100 adopts that the perforated hole is formed so that the dowel bar 110 is the through-hole 210 in the field. It is installed to be inserted at the same time and the hole.

In the case of a new building, the precast concrete beam manufactured by the factory is selected as the concrete beam 200 to be completed as a precast concrete building. In this case, it is preferable to manufacture in advance so that the through-hole 210 is formed in the factory because it can reduce the field work. In building a precast concrete building completed by adopting such a precast concrete beam, the precast concrete beam is installed in a state in which only the main column C is constructed (pre-construction), or in a state in which the precast concrete support 100 is also constructed. We can install (post-construction). However, in the case of constructing a multi-storey new building, it is preferable to proceed with the precast concrete beam installation work immediately after installing only the pillar (C) in consideration of air. The construction of the precast concrete column 100 and the upper layer at the lower layer by constructing the lower layer only after the construction of the main column (C), precast concrete beam 200 and slab (B) and then proceed to the process of the upper layer. This is to shorten the air by simultaneously proceeding with the construction process.

The grouting material 500 is injected into the through-hole 210 of the concrete beam so that the dowel bar 110 is completely fixed to the concrete beam 200 to integrate the concrete beam 200 and the precast concrete column 100. Play a role. If the precast concrete column 100 adopts that the recess 120 is formed on the upper surface as shown in Figure 2 will be able to increase the integrity of the joint as described above. The grouting material 500 is preferably a non-shrink mortar to secure the required strength of the joint.

The precast concrete column 100 installed to construct the concrete beam 200 as a continuous beam is installed in contact with the floor slab (B), wherein the junction of the lower surface of the precast concrete column 100 and the floor slab (B) 1 is preferably configured to include a base plate 300, the level adjuster 400 and the grouting material (500). That is, the base plate 300 is installed horizontally at a predetermined interval from the floor slab, and a plurality of level adjusters 400 are provided to adjust the horizontality of the base plate 300 to be installed on the base plate 300. Secure the verticality of the concrete column 100 and then inject the grouting material 500 into the space between the base plate 300 and the floor slab (B) to stably precast concrete column 100 to the floor slab (B) Will be joined.

As the level adjuster 400, any of wedges and level adjusting bolts may be selected. In FIG. 1, a level adjustment bolt is shown. The level adjustment bolt is directly fastened to the base plate 300 having a plurality of female threaded holes or inserted into the base plate 300 having a plurality of bolt holes. The plate 300 is fastened with the nut to adjust the horizontal degree of the base plate 300 as the fastening degree. In this case, it is preferable that the level adjuster 400 is not exposed to the outside of the precast concrete column 100 as shown in FIG. To this end, when adopting the protruding to the upper base plate 300, such as the level adjusting bolt to the level adjuster 400, a plurality of fixing grooves 130 along the outer circumferential surface in the lower portion of the precast concrete support 100 Adopted to be formed and installed so that the level adjuster 400 is accommodated in the fixing groove 130, the grouting material 500 is injected. As such, the level controller 400 is accommodated in the precast concrete column 100 so that the level controller 400 also functions as a kind of fixing anchor at the junction of the precast concrete column 100 and the floor slab B.

Referring to the construction method for applying the present invention having the configuration as described above are as follows. Pin beam structure of concrete beam 200 and precast concrete column 100 for constructing concrete beam 200 as continuous beam by installing precast concrete column 100 at the lower part of concrete beam 200 The construction method of the can be largely divided into two, the method of pre-construction concrete post (100) pre-construction than concrete beam 200 (hereinafter, the pre-construction method) and the post-construction method of the construction after the installation of the concrete beam (200) Hereinafter, the post-construction method is that.

First, the pre-construction method will be described.

The pre-construction method is a method adopted during the construction of precast concrete buildings, and when applied to the construction of a multi-storey building, the process proceeds by laminating the upper and lower layers sequentially. In the pre-construction method, as the precast concrete column 100, the dowel bar 110 is manufactured to be embedded in the factory, and the precast concrete beam having the through-hole 210 formed at the intermediate point of the concrete beam 200 as the main member. Will be adopted.

When the installation of the main column (C) is completed, the base plate 300 and the level adjuster 400 are installed at predetermined intervals on the bottom slab B of the intermediate point.

A precast concrete column 100 having a dowel bar is installed on the base plate 400 with a portion protruding upwardly.

The precast concrete beam 200 is installed to insert the dowel bar 110 of the precast concrete column into the through-hole 210 of the precast concrete beam. Both ends of the precast concrete beam 200 is joined to the main column (C) in a conventional manner.

Subsequently, while adjusting the level adjuster 400, the verticality of the precast concrete column 100 is aligned and the precast concrete column 100 is pushed up to closely contact the lower portion of the precast concrete beam 200.

The grouting material 500 is injected into the space between the through-hole 210 and the bottom slab B and the base plate 300 of the precast concrete beam to ensure the integrity of the joint. As a result, the precast concrete beam 200 is pin-bonded with the precast concrete column 100 which is installed under the precast concrete beam 200 is constructed as a continuous beam.

Next, the post-construction method will be described.

The post-construction method can be applied to new construction of precast concrete buildings as well as to reinforcement of already-built concrete buildings. ), The beam (200) can be installed in the precast concrete column 100 installation of the lower floor in the progress of the construction is a method that can be expected to shorten the air by parallel construction of the upper and lower floors. In the post-construction method, the dowel bar 110 is not buried at the factory manufacturing stage of the precast concrete column 100, but is buried as it is installed on site. For this purpose, the dowel bar 110 is inserted into the precast concrete column 100. Adopted that the perforated hole is formed to a predetermined depth from the top to be.

The concrete beam 200 having the through-hole 210 formed at the intermediate point where the precast concrete column 100 is installed in the state in which the main pillar C is constructed is constructed. Such a process prepares a precast concrete beam 200 in which the through-hole 210 is formed in the construction of a building. At the time of reinforcement of the already built building is made by forming a through-hole 210 by drilling in the pre-installed concrete beam 200.

The base plate 300 and the level adjuster 400 are installed at predetermined intervals on the bottom slab B at an intermediate position.

The precast concrete column 100 is installed on the base plate 300 so that the through-hole 210 of the concrete beam and the drill hole of the precast concrete column 100 coincide with each other, and the through hole 210 of the concrete beam Insert the Dowel Bar 110 into the precast concrete piercing hole.

Subsequently, while adjusting the level adjuster 400, the verticality of the precast concrete column 100 is aligned and the precast concrete column 100 is pushed up to closely contact the lower portion of the concrete beam 200.

The grouting material 500 is injected into the space between the through-hole 210 and the bottom slab B and the base plate 300 of the precast concrete beam to ensure the integrity of the joint. As a result, the concrete beam 200 is pin-bonded with the precast concrete column 100 installed below the concrete beam 200 is constructed as a continuous beam.

Although the present invention has been described in detail by the embodiments described above, those skilled in the art to which the present invention pertains will be capable of various substitutions, additions and modifications without departing from the technical spirit described above. It is to be understood that such modified embodiments also fall within the protection scope of the present invention as defined by the appended claims below.

According to the present invention as described above, by designing the precast concrete column in the lower part of the beam at the middle point when designing the concrete continuous beam to facilitate the construction convenience by reinforcing the deflection and stress of the concrete beam, as well as easy to the already built concrete building Applicable. In addition, the support for continuous beams can be installed after slab construction, enabling parallel construction of upper and lower layers.In the end, the short-term construction of the factory building in the timing industry where timely launch of new products is important, such as semiconductor, electronics, and TFT-LCD industries. It is expected to be possible to build.

Claims (10)

In the pin joint structure in which the precast concrete column is installed below the concrete beam and its middle point, A precast concrete column having a dowel bar which is partially embedded to protrude upwardly and is installed on the floor slab; The through-hole is formed at the intermediate position, the concrete beam supported by the precast concrete support while the dowel bar of the precast concrete support is inserted into the through hole; And, Grouting material injected into the through-hole of the concrete beam; Pin joint structure of the concrete beam and precast concrete column, characterized in that comprising a. In claim 1, The concrete beam pin joint structure of the concrete beam and precast concrete column, characterized in that the factory prefabricated concrete beam. In claim 1, The upper surface of the precast concrete column is a pin joint structure of the concrete beam and precast concrete column, characterized in that it comprises a concave portion so that the center portion is recessed. The method according to any one of claims 1 to 3, The junction of the bottom surface of the precast concrete column and the bottom slab, A base plate installed horizontally on a lower portion of the precast concrete column and installed at a predetermined interval from a floor slab; A plurality of level adjusters for adjusting horizontality of the base plate; And, A grouting material injected into the space between the base plate and the bottom slab; Pin joint structure of the concrete beam and precast concrete column, characterized in that comprising a. In claim 4, A plurality of female screw holes are formed in the base plate, The level adjuster is a pin joint structure of the concrete beam and precast concrete support, characterized in that consisting of a level adjusting bolt for fastening with the female screw hole formed in the base plate. In claim 5, A plurality of bolt holes are formed in the base plate, The level adjuster is a pin joint structure of the concrete beam and precast concrete support, characterized in that it comprises a level adjusting bolt inserted into the bolt hole of the base plate and a nut coupled with the level adjusting bolt under the base plate. In claim 5, A plurality of fixing grooves are formed in the lower portion of the precast concrete support along the outer peripheral surface, Joining structure of the concrete beam and precast concrete strut, characterized in that the grouting material is injected after the leveling regulator is installed to accommodate the precast concrete column. The precast concrete column is installed below the middle point of the concrete beam to construct the concrete beam as a continuous beam. Installing a base plate and a level regulator at predetermined intervals on the bottom slab of the intermediate point; Preparing a precast concrete column having a dowel bar, the portion of which protrudes upwardly and is installed on the base plate; Preparing a precast concrete beam having a through hole formed at an intermediate point and installing the dowel bar of the precast concrete column in the through hole; Adjusting the level adjuster while fitting the verticality of the precast concrete column and pushing up the precast concrete column to closely contact the lower part of the precast concrete beam; Injecting grouting material into the space between the through-hole of the precast concrete beam and the floor slab and the base plate; Construction method of the pin joint structure of the concrete beam and precast concrete struts, characterized in that comprising a. The precast concrete column is installed below the middle point of the concrete beam to construct the concrete beam as a continuous beam. Constructing a concrete beam having a through hole formed at an intermediate point; Installing a base plate and a level adjuster on the bottom slab at an intermediate position at a predetermined interval; Preparing a precast concrete column formed with a perforation hole at a predetermined depth from an upper portion thereof, and installing the precast concrete column on the base plate to coincide with the through hole of the perforation hole and the concrete beam; Installing a dowel bar in the through-hole of the concrete beam and the perforation hole of the precast concrete column; Adjusting the level adjuster while fitting the verticality of the precast concrete support and pushing up the precast concrete support to closely adhere to the bottom of the concrete beam; Injecting grouting material into the through-hole of the concrete beam and the space between the floor slab and the base plate; Construction method of the pin joint structure of the concrete beam and precast concrete column, characterized in that comprising a. The method of claim 8 or 9, In the step of injecting the grouting material, the construction method of the pin joint structure of the concrete beam and precast concrete support, characterized in that the grouting material is non-shrink mortar.

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