KR20150139350A - Precast box using bended angle connection plate and construction method therefor - Google Patents

Abstract

The present invention relates to a PC box using a bent angle-type connecting plate and a constructing method thereof, capable of simply integrating upper and lower PC segments after manufacturing the upper and lower PC segments and vertically stacking the upper and lower segments one after another. Connection grooves are formed on lateral surfaces of both lateral wall units of the upper and lower PC segments coming into contact with each other. Main steel reinforcements are welded and installed in the connected connection grooves (A1, A2). Finger connection plates coupled with connection bolts are exposed. Accordingly, the upper and lower PC segments are vertically joined by connecting the exposed finger connection plates to additional connection plates with nuts.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a PC box using a bending angle-

The present invention relates to a bending-angle-type connecting plate. And more particularly, to a PC box using a bending-angle-type connecting plate that can manufacture upper and lower PC segments, stack upper and lower parts, and then simply integrate upper and lower PC segments with each other.

1A is not a PC box, but a connection port of a PC column can be identified.

That is, as shown in FIG. 1A, the upper layer sleeve 11 is embedded in the upper layer PC column 10a; A lower layer sleeve (12) having a lower end embedded in the lower layer PC column (10b); And a lower end of which is screwed to the upper end of the lower layer sleeve 12 and has an upper end supporting the upper layer PC column 10a; (10) comprising: Layer vertical reinforcing bar 30 and the lower vertical reinforcing bar 30,

The lower end of the upper vertical bar 20 is engaged with the upper end of the upper barrel 11 and the lower vertical bar 30 is threadedly engaged with the lower layer sleeve 12 and the height adjuster 13 , And a PC pillar connection port (10) to be fitted and fixed to the lower end of the upper layer sleeve (11) is disclosed.

Accordingly, when the PC columns made of precast concrete are connected by using the sleeve and the reinforcing bars, the number of the sleeves 11, 12 and the reinforcing rods 20, 30 are increased, and the manufacturing and the workability are inevitably reduced .

FIG. 1B discloses a bonding structure for vertically connecting a conventional PC box.

That is, the weft mortar portion 40 is interposed between the upper and lower PC wall members 20 and 30 to join the upper PC wall member and the lower PC wall member. A plurality of reinforcing bar connecting plate members 50 welded to the lower end reinforcing bars 40 of the vertical reinforcing bars embedded in the upper PC wall member 20; A plurality of connecting recesses (60) formed on a lower side of the PC wall member so that a lower portion of the plate member is exposed; A welding portion 80 welded to the lower end of the plate member exposed in the connection recess to weld the upper end reinforcing bar 70 of the vertical reinforcement embedded in the lower PC wall member; The plate-to-reinforcing structure of the upper and lower wall PCM members made of the mortar (not shown) that is welded to the reinforcing connecting plate member after being filled with the exposed upper end reinforcing bars 70 of the vertical reinforcing bars is disclosed .

1B is related to the PC box but the lower end portion of the upper PC wall member 20 and the lower end portion of the lower PC wall member 30 and the upper end portion of the upper end reinforcing bar 70 in the connection recess portion 60, Are connected to each other by welding. As a result, quality control is not easy when the welding work is performed on the spot, and the workability is also inferior.

Accordingly, the present invention provides a method of manufacturing a PC box, which is manufactured by forming upper and lower PC segments and vertically joining them with each other, using a connecting plate previously integrated with a cast iron root, And to provide a PC box and a construction method thereof using a bending angle connection plate which is capable of joining upper and lower segments more easily and is easy to control quality.

According to an aspect of the present invention,

First, the upper and lower PC segments are to be manufactured by precast method, and the cast iron rods are embedded in both side walls in the form of vertical bars. Since the cast iron has to bear the principal stress, the cast iron rods of the upper and lower PC segments must be connected to each other to ensure the structural integrity of the upper and lower PC segments that are vertically joined.

Accordingly, it is possible to secure a working space by vertically connecting the upper and lower connecting segments of the upper and lower PC segments with each other so that the upper and lower connecting segments are vertically connected to each other. In the connecting groove A, So that the lower end and the upper end of the welded bent-angle connecting plate are exposed.

At this time, the bolt holes of the bolt connecting plate are inserted into the bolt part in the communicating groove so that the bolt part of the bolt is exposed beforehand at the lower end and the upper end of the exposed bent-angle connecting plate, and the bolt- So that they can be connected.

Thus, the operator can easily vertically bond the upper and lower PC segments by simply tightening the bolts protruding from the overlapping connection plate by a horizontal operation, thereby making it easy to vertically bond the upper and lower PC segments and secure structural integrity Respectively.

Second, the bending angle-type connecting plate may have a plurality of insertion holes formed in the upper and lower joint portions for easy welding connection between the upper and lower PC segments, and the ends of the cast iron rods inserted into the insertion holes may be connected to the bending- Respectively. This welding operation is performed in advance at the factory in the production of the upper and lower PC segments. Therefore, in the field, the upper and lower PC segments are not welded for vertically joining, which is very advantageous for the field management and quality control of the upper and lower PC segments do.

In the upper and lower PC segments according to the present invention, a bending angle-type connection plate is pre-welded to the main steel bars, and a lower end portion and an upper end portion of the bending angle- The upper and lower PC segments can be structurally connected to each other by vertically connecting the upper and lower PC segments to each other. Thus, the workability is greatly improved and a more efficient and economical PC box construction is possible.

In addition, since the bolt portion is previously formed on the bending angle-type connecting plate, the overlock connecting plate can be installed only by tightening the nut, thereby providing a PC box and a construction method thereof by joining the upper and lower PC segments more quickly .

Thus, the cast iron rods of the upper and lower PC segments of the present invention are vertically continuous and strong, so that quality control of the upper and lower joint portions of the completed PC box becomes possible. Further, the bending angle-type connecting plate is formed so that all of the ground roots are connected to each other, so that more stable upper and lower PC segment upper and lower bonding becomes possible.

Figs. 1A and 1B show a vertically-bonded structure of a vertical column and a PC box, respectively,
FIGS. 2A, 2B, and 2C are top, bottom, and side views of a PC box using a bending-angle connecting plate according to the present invention,
FIGS. 3A, 3B and 3C are top and bottom joints of a PC box using a bending-angle connecting plate according to the present invention,
FIGS. 4A and 4B show a flowchart of a PC box construction method using the bending-angle connecting plate of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

[PC box 100 using bending angle connecting plates 140a and 140b]

FIGS. 2A, 2B, and 2C are a top view and a bottom view of a PC box using a bending-angle connecting plate according to the present invention, an exploded perspective view and a partially enlarged view, respectively.

4A and 4B, the upper and lower PC segments 100a and 100b of the PC box 100 are vertically joined to each other and are assembled into a box body having a rectangular cross-section, for example, .

The reason why the upper PC segment 100a and the lower PC segment 100b are assembled vertically is because of the cross-sectional size of the PC box. For example, a PC box having a width of 9M and a height of about 7M has a unit length (1M), it can not be easily transported and manufactured because it is made of reinforced concrete.

However, if the number of segments increases, the number of joints increases. Therefore, the workability and workability are inevitably deteriorated in joining part construction, and quality control becomes difficult.

As shown in FIG. 2A, the upper and lower PC segments 100a and 100b are manufactured by previously manufacturing the upper and lower PC segments 100a and 100b, ) Are vertically bonded to each other.

The top and bottom joints are made at the site where the actual PC box 100 is to be installed, and the PC boxes that are vertically jointed to each other are connected to each other in the longitudinal direction so that the PC box construction having a constant extension length can be achieved.

The structure finally completed by the PC box construction may be, for example, a culvert or a tunnel structure, but the present invention will be described with reference to a case where it is simply used as a culvert.

First, the upper PC segment 100a is formed into a U-shaped cross section including a top plate 110a and both side wall portions 120a, which are opened downward as shown in FIG. 4A.

As shown in FIGS. 2B and 2C, a vertical reinforcing bar 130a is previously disposed inside the both side wall portions 120a of the upper PC segment 100a, and the lower inner side surface and the outer side surface of the both side wall portions 120a And the connection groove A2 of the broken groove shape (block-out) is formed and the lower portion is opened. At this time, the connecting groove A2 is formed to be large enough to expose the bolt hole 142a of the at least lower bent-angle connecting plate 140a described later.

As shown in FIG. 2B, the cast iron 130a is inserted into the insertion hole 141a of the lower bent-angle connecting plate 140a and is fixed by welding. Accordingly, the cast iron rods are fixed to the plurality of insertion holes 141a formed at the upper end of the lower bent-angle-type connecting plate 140a, respectively, because a plurality of the cast iron rods are spaced apart from each other according to the longitudinal widths of both side walls.

Accordingly, an insertion hole 141a is formed in the upper end of the lower bending angle-type connection plate 140a, and a bolt hole 142a is formed in the lower middle portion.

At this time, it can be seen that a plurality of connecting bolts 143a are fastened to the bolt holes 142a in advance.

The connecting bolt 143a is disposed such that the bolt 144a passes through the bolt hole 142a and is exposed to the outside of the connecting groove A2. That is, the bolt head is brought into contact with the back surface of the lower bent angle-type connecting plate 140a so that the bolt 144a protrudes through the bolt hole and protrudes into the connection groove A2.

By using the bolt 144a, the upper and lower adjacent lower and upper bending angle-type connecting plates 200 are brought into contact with each other and connected to each other.

As a result, it can be seen that the bolt 144a of the lower bending angle-type connecting plate 140a is exposed in the connecting groove A2 of the upper PC segment 100a. The lower-bending angle- All of the cast iron rods 130a arranged along the longitudinal width are connected vertically. And the size and the number thereof are determined.

In FIG. 2A, it can be seen that all of the plurality of cast iron rods are connected to the two lower-end bent-angle connecting plates 140a over the longitudinal width W1.

Next, the lower PC segment 100b is formed with a U-shaped cross section including a lower plate 110b and upper and lower side wall portions 120b as shown in FIG. 2A.

As shown in FIG. 2B, a vertical reinforcing bar 130b is also arranged inside the upper and lower side walls 120b of the lower PC segment 100b, It can be seen that the connection groove A1 in the form of a groove (block-out) is formed and the upper portion is also opened. At this time, the connection groove A1 is formed so that at least a bolt hole 142b described later is exposed.

Also, it can be seen that the cast steel 130b is inserted into the insertion hole 141b of the upper bent angle-type connecting plate 140b and is fixed by welding. Accordingly, the cast iron root is connected to the plurality of insertion holes 141b formed at the lower end of the one or more upper bending angle-type connecting plates 140b in accordance with the longitudinal direction width of the side walls.

It is to be noted that an insertion hole 141b is formed at the lower end of the upper bent angle-type connection plate 140b and a bolt hole 142b is formed at the upper center portion and a plurality of connection bolts 143b are installed in the bolt hole 142b. have.

The connection bolt 143b is disposed so that the bolt 144b is exposed to the outside from the bolt hole 142b and is fastened to the back surface of the upper bending angle-type connection plate 140b in advance.

By using such a bolt, the dam coupling plate 200 is vertically adjacent to the lower and upper bending angle-type coupling plates 200 so as to be connected to each other.

It is also seen that the bolt portion 144b of the lower bending angle-type connecting plate 140a is exposed in the connecting groove A1 of the lower PC segment 100b. The lower-bending angle-type connecting plate 140a is connected to the upper- Are all the vertical bars connected vertically over the longitudinal width? And the size and the number thereof are determined.

In FIGS. 2A and 2C, it can be seen that all of the plurality of cast iron rods are connected to the two lower-end bent-angle connecting plates 140a over the longitudinal width W1.

2B and 2C, the upper and lower PC segments 100a and 100b of the present invention may be connected to each other by the overlap connection plate 200 at the upper and lower joints.

That is, it can be seen that the upper and lower PC segments 100a and 100b are connected to each other at the upper and lower joint portions B and the connection grooves A1 and A2 are communicated with each other at the upper and lower joint portions, The lower and upper bending angle-type connecting plates 140a and 140b are exposed,

It can be seen that the bolt portions 144a and 144b provided in the bolt grooves are also exposed to the exposed lower and upper bending angle-type connecting plates 140a and 140b.

The worker inserts the bolt holes 210a and 210b of the overlap connection plate 200 into the bolt portions 144a and 144b in the connection grooves A1 and A2 formed on the inner and outer sides of the upper and lower PC segments 100a and 100b, And the nut connecting plate 200 is connected to the front surface of the finger connecting plate using the nut 220 so that the lower and upper bent angle connecting plates 140a and 140b are structurally connected to each other, It can be seen that the workability and the workability are greatly improved because the operator can make such connection only by fastening the nut 220 in the space.

That is, the bolt hole 210 is formed in the upper and lower parts, and the bolt part 144b of the upper bending angle-type connecting plate 140b is penetrated so that the bolt part 144b is connected to the upper bent angle- And the bolt portion 144a of the lower bent angle-type connecting plate 140a is passed through the upper bolt hole and the bolt portion 144a is fastened to the lower bent angle-turning connecting plate 140a by the nut 220. [ do.

The upper and lower PC segments 100a and 100b are connected to the lower and upper bent angle connecting plates 140a and 140b so that the upper and lower PC segments 100a and 100b are connected to both the upper and lower PC segments 100a and 100b. (130a, 130b) are vertically connected to each other at the upper and lower bonding portions (B) without disconnection, and quality control is facilitated through structural integration.

As a result, it is not necessary to connect the cast iron rods to each other by using a sleeve or the like as in the prior art. Even if the cast iron rods 130a and 130b are not welded one by one, the cast iron rods can be structurally connected to each other vertically .

The damper connection plate 200 uses a steel plate having a bolt hole 210 corresponding to the bolt portion, and at least one or more bolts 210 are used in consideration of the number of the bolt portions and the sizes of the connection grooves A1 and A2. In FIG. 2B, two connecting grooves A1 and A2 are provided on the inner and outer surfaces of the side wall portions, respectively, so as to secure the fixing length of the cast iron root by the connecting grooves.

[Example of Vertical Joining of PC Box 100 Using Lower and Upper Bending Angle Connection Plates 140a and 140b]

FIGS. 3A, 3B and 3C are views showing rolls of the upper and lower junctions of the PC box 100 using the lower and upper bending angle-type connecting plates 140a and 140b, respectively.

3A, it can be seen that one overlapping connection plate 200 is installed on the lower and upper bending angle-type connecting plates 140a and 140b exposed in the connection grooves A1 and A2. In this case, it can be seen that the longitudinal width of the exposed lower end and the upper bending angle-type connecting plates 140a and 140b, which are aligned with the longitudinal width W1 of both side wall portions, is not large and that one overlapping connection plate 200 is installed In addition,

3BW shows that the two overlapping connection plates 200 are installed considering the workability because the widths of the lower and upper bent angle-type connection plates 140a and 140b exposed in the connection groove A are large. In addition,

As shown in FIG. 3C, since the widths of the lower and upper bending angle-type connecting plates 140a and 140b exposed to the connection groove A are relatively large, it is understood that three overlapping connection plates 200 are installed.

In the case of the upper and lower PC segments 100a and 100b according to the present invention, the longitudinal widths of both side walls can be changed. However, the longitudinal widths of the exposed lower and upper bending angle-type connecting plates 140a and 140b It can be seen that the dam connection plate 200 can be installed in a plurality of places because it works in the field.

[PC Box Construction Method Using Bending Angle Connection Plate]

FIGS. 4A and 4B show a PC box construction method using the bending-angle connecting plate of the present invention in order.

That is, as shown in FIG. 4A, the upper and lower PC segments 100a and 100b are manufactured in the factory in advance. This is because, considering the manufacturable size, transportation, And the finger connection plates 140a and 140b are exposed in the connection grooves A1 and A2 of the upper and lower bonding portions in FIG. 4A.

In the upper and lower PC segments 100a and 100b brought into the field, the lower PC segment 100b is first installed on the ground, and the upper PC segment 100a is placed on the upper surface of the lower PC segment 100b So that the connection grooves A1 and A2 are communicated with each other.

Next, as shown in FIG. 4B, the bolt holes 210 of the overlap connection plate 200 are inserted into the bolt portions of the finger connection plates 140a and 140b exposed in the connection grooves A1 and A2 in the vertical joint portion, And the lower PC segments 100a and 100b to each other.

The upper and lower PC segments 100a and 100b bonded to the upper and lower sides of the PC box 100 are not shown, but the PC box 100 having a constant extension length can be constructed in such a manner that the upper and lower PC segments 100a and 100b are longitudinally compressed using a longitudinal torsion material .

Furthermore, exponential and grouting materials can be used for the upper and lower joints B so that the lifting phenomenon does not occur in the upper and lower joints B in the unification.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: PC box
100a: upper PC segment 110a: upper plate
120a: Both side walls 130a:
140a: Lower Bending Angle Connection Plate
141a: insertion hole 142a: bolt hole
143a: connection bolt 144a: bolt part
100b: upper PC segment 110b:
120b: Both side walls 130b:
140b: Upper bending angle connecting plate
141b: insertion hole 142b: bolt hole
143b: connection bolt 144b: bolt part
200: Overhang connection plate

Claims (8)

A bolt hole 142a in which a bolt portion 144a is horizontally inserted is formed at the upper end and a finger hole 141a in which a cast iron root 130a is inserted and fixed is formed so that the bolt portion 144a is inserted into the connection groove A2 An upper PC segment 100a formed as a U-shaped cross-section including a lower bent angle-type connecting plate 140a formed to be embedded in the lower end of both side plates 120a so as to be exposed to the lower side of the upper PC segment 100a.
A bolt hole 142b in which a bolt portion 144b is horizontally inserted is formed at the upper end and a finger hole 141b in which a cast iron root 130b is inserted and fixed is formed so that the bolt portion 144b is inserted into the connection groove A1 A lower bend PC segment 100b formed in a U-shaped cross-section including an upper bending angle-type connecting plate 140b embedded in the upper end of both side plates 120b so as to be exposed to the lower bending unit 120a. And
The bolt hole 210 is formed in the upper and lower parts so that the bolt part 144b of the upper bent angle-type connecting plate 140b is penetrated and the bolt part 144b is connected to the upper bent angled connecting plate 140b And the upper bolt hole is engaged with the bolt 144a of the lower bent angle-type connecting plate 140a so that the bolt 144a is fastened to the lower bent-angle connecting plate 140a by the nut 220, A PC box using a bending-angle connection plate including a connection plate (200). The method according to claim 1,
The upper PC segment 100a formed with the inverted U-shaped cross-section includes an upper plate 110a; And a pair of side plates (120a) extending from both sides of the upper plate (110a) to the lower side and having a connecting groove (A2) formed by block- box. 3. The method of claim 2,
The lower PC segment 100b formed in the U-shaped section includes a lower plate 110b; And a pair of side plates 120b extending upwardly from both sides of the lower plate 110b and having a connecting groove A1 formed by block-outing the upper joining surface so as to open the upper side. box. The method according to claim 1,
The connection grooves A1 and A2 of the upper PC segment 100a and the connection recesses A1 and A2 of the lower PC segment 100b are vertically communicated with each other, At least one of the connecting plate (200) is installed. The method according to claim 1,
The main steel bars 130a and 130b are inserted into the insertion holes 141a and 141b and then fixed by welding. The welding is performed in a bending-angle-type manner in which the upper PC segment 100a and the lower PC segment 100b are pre- PC box with connecting plate. A bolt hole 142b in which a bolt 144b is horizontally inserted is formed at a lower end of a finger hole 141b fixed by welding with the cast iron 130b inserted therein and the bolt 144b is connected And a bottom bending angle-type connecting plate (140b) formed to be embedded in the upper end of both side plates so as to be exposed to the groove (A1), and a lower PC segment (100b)
The upper end of the lower PC segment 100b installed on the ground is fitted with a cast iron root 130a and a finger hole 141a fixed by welding is formed on the upper end and a bolt portion 144b is inserted horizontally And a bottom bent angle-type connecting plate 140a formed with a hole 142a and embedded in the lower end of both side plates so that the bolt portion 142a is exposed to the connecting groove A2. (100a) to be placed thereon,
The bolt hole 210 is vertically formed so that the bolt portion 143b of the upper bent angle-type connecting plate 140b passes through the lower bolt hole and the bolt portion 143b is fastened to the upper bent angle- And the upper bolt hole is formed with a bolt portion 143a of the lower bent angled connecting plate 140a through which the bolt portion 143a is fastened to the lower bent angled connecting plate 140a Including the steps to install
The upper PC segment 100a and the lower PC segment 100b are vertically joined so that the connection grooves A1 and A2 of the upper PC segment 100a and the connection recesses A1 and A2 of the lower PC segment 100b are vertically And at least one overlapping connection plate (200) is provided in the communicating connection groove (A). The method according to claim 6,
Wherein the upper PC segment (100a) and the lower PC segment (100b) are vertically joined to each other so as to be in contact with each other, and then pressed and integrally moved with each other. The method according to claim 6,
The lower PC segment 100b formed in the U-shaped section includes a lower plate 110b; And both side plates 120b extending upward from both sides of the lower plate 110b and having connection grooves A formed by block-outing the upper joining surface so as to open the upper side,
The upper PC segment 100a formed with the inverted U-shaped cross-section includes an upper plate 110a; And a pair of side plates (120a) extending from both sides of the upper plate (110a) to the lower side and having a connection groove (A) formed by block- Box construction method.

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