KR100555251B1 - The bridge construction method of having used girder equipped with the side projection fixing block in which multiple-purpose tension is possible, and this - Google Patents

Abstract

The present invention is to fix the side protrusion fixing block on both sides of the end of the beam, and to install the sole reinforcing sole plate at the end to overcome the mechanical limitations of the prestressed concrete beam, the side protrusion fixing capable of multi-purpose tensioning simple construction The purpose of the present invention is to provide a mold in which a block is fixed and a bridge construction method using the same.

To achieve the above object, a mold in which a multi-purpose tensionable side protrusion fixing block is fixed according to the present invention includes a beam consisting of upper and lower flanges and an abdomen; A primary tension fixing device installed to introduce a tension force for tensioning the PC steel at a predetermined position on the end side of the beam; A continuous steel fixedly installed at one end of the upper flange of the beam for continuation of a unit beam of a predetermined size; A reinforcement member fixed to the upper flange of the beam in the longitudinal direction; A fixing block protruding from both sides of the beam with a predetermined width and width; Characterized in that the end reinforcement combined sole plate fixed to one side of the lower flange of the beam.

In addition, the bridge construction method using a mold fixed to the multi-purpose side-projection fixing block according to the present invention for achieving the above object comprises the steps of assembling the reinforcing bars to form a beam (I); Attaching the multi-purpose tensioning side protruding fixing block to both sides of the assembled reinforcing beam, and connecting the PC steel while installing the primary tensioning fixture in the predetermined position at both ends of the mold, and up and down for continuity at the upper end of the fixing block After installing the sequential primary and secondary tension anchorages, installing the secondary tension anchorage of the mold at the lower end of the anchoring block, and installing the maintenance anchorage just above the secondary tension anchorage, After installing the reinforcement having a certain length in the upper flange, the step of curing the concrete to make a beam and the first tension (II); Installing the fabricated beams on bridge piers and alternating bridges, and connecting the reinforcement installed in the upper flange with the continuous steel and the high-strength bolt in order to connect the beams and the beams installed adjacent to each other (III); Filling the continuous connection portion with concrete and contacting each other at the side of the beam and the side of the beam by epoxy injection or filling with non-shrink mortar to close the finish (IV); (V) placing and curing the slab after introducing the tension force into the PC steel connected to the sequential primary tension anchorage in the upper end of the fixing block attached to both sides of the beam to perform the sequential primary tension of the beam; Performing secondary tension of the beam by introducing a tension force to the PC steel connected to the secondary tension anchor at the lower end of the anchoring block after curing the slab; It is characterized by consisting of a step (Ⅶ) of the continuous secondary tension by introducing a tension force to the PC steel connected to the continuous secondary tension anchorage.

Multi-purpose tensile, side extrusion, fixing block, mold, bridge construction method

Description

The bridge construction method of having used girder equipped with the side projection fixing block in which multiple-purpose tension is possible, and this}

1 is an exemplary view showing a two-span continuous bridge made of a mold in which a multi-purpose tensionable side protrusion fixing block according to the present invention is fixed;

2 is an enlarged detailed view of the connection part of FIG. 1;

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a cross-sectional view taken along the line B-B of FIG.

5 is a cross-sectional view taken along the line C-C of FIG.

Figure 6 is a perspective view showing the reinforcement of the mold fixed to the side protrusion fixing block according to the present invention,

Figure 7 is a side view showing the reinforcement of the mold is fixed to the side protrusion fixing block according to the present invention,

8a to 8f are exemplary views showing various side protrusion fixing blocks of the present invention;

Figures 9a to 9j is an illustration showing a form in which the protruding block of the wedge shape is added to the various side protrusion fixing block of the present invention,

10 is a perspective view showing the end reinforcement combined sole plate of the mold is fixed to the side protrusion fixing block according to the present invention,

11 is a side view showing an end reinforcement combined sole plate of a mold having a side protrusion fixing block according to the present invention,

12 is an exemplary view showing a three-span continuous bridge made of a mold in which a multi-purpose tensionable side protrusion fixing block according to the present invention is fixed;

Figure 13 is a perspective view showing the end reinforcement combined sole plate of the mold is fixed to the side protrusion fixing block according to the present invention,

14 is a side view showing an end reinforcement combined sole plate of a mold having a side protrusion fixing block according to the present invention;

Figure 15 is a side view showing a state in which the sole plate is installed in the mold fixed side projection fixing block according to the present invention.

 Explanation of symbols on the main parts of the drawing

10 beam 12 upper flange

14: lower flange 16: abdomen

20: PC steel 30: primary tension fixing device

32: continuous primary tension fixing device 34: continuous secondary tension fixing device

35: secondary tension anchorage and continuous primary tension anchorage

36: secondary tension anchorage 38: maintenance anchorage

39a: Fixture for maintaining constant moment part

39b: Fixture for maintenance of parent section

40: continuous steel 42: high tension bolt

50: reinforcing material 52: plate

54: stud bolt 56: drilling part

60: fixing block 62: protrusion

70: end plate combined sole plate 72: horizontal plate

74: vertical plate 75: bending plate

76: stud bolt 78: anchorage

79: fixing plate 82: pier

84: shift 86: serial connection

88: chair device

The present invention relates to a mold in which a lateral protrusion fixing block capable of multi-purpose tension is fixed and a bridge construction method using the same. In particular, the lateral protrusion fixing block is fixed to both sides of an end of a beam, and an end reinforcing sole plate is installed at an end. The present invention relates to a mold on which side projection fixing blocks capable of multi-purpose tensioning which overcomes the mechanical limitations of prestressed concrete beams and simplify construction, and a bridge construction method using the same.

In general, prestressed concrete beams in which tension wires are introduced by installing a stranded wire in reinforced concrete have a limitation in the tension force that can introduce the stranded wires due to cracking due to tensile force on the upper part of the prestressed concrete beams when a tensioning force is introduced into the stranded wires. In addition, there is a problem in that the height of the prestressed concrete beam is increased while the interval of the prestressed concrete beam is shortened.

In addition, the bridge is not able to withstand the tensile force generated by the static moment acting on the prestressed concrete beam over time, so that a crack is generated in the lower portion of the prestressed concrete beam, there is a problem that does not serve as a bridge.

In addition, the bridge not only causes corrosion of reinforcing bars due to cracking, but also has a problem of seriously affecting the strength of the prestressed concrete beam by reducing adhesion between concrete and reinforcing bars due to air pollution, thereby reducing the durability of the bridge. .

Therefore, the present invention has been made to solve the problems described above, by fixing the side projection fixing block on both sides of the end side of the beam, by installing the end plate for both ends reinforcement sole plate dynamics of the prestressed concrete beam The object of the present invention is to provide a mold in which a lateral protrusion fixing block capable of multipurpose tensioning, which overcomes limitations and simplifies workability, and a bridge construction method using the same.

To achieve the above object, a mold in which a multi-purpose tensionable side protrusion fixing block is fixed according to the present invention includes a beam consisting of upper and lower flanges and an abdomen; A primary tension fixing device installed to introduce a tension force for tensioning the PC steel at a predetermined position at the end side of the beam; A continuous steel fixedly installed at one end of the upper flange of the beam for continuation of a unit beam of a predetermined size; A reinforcement member fixed to the upper flange of the beam in the longitudinal direction; A fixing block protruding from both sides of the beam with a predetermined width and width; Characterized in that the end reinforcement combined sole plate fixed to one side of the lower flange of the beam.

In addition, the bridge construction method using a mold fixed to the multi-purpose side-projection fixing block according to the present invention for achieving the above object comprises the steps of assembling the reinforcing bars to form a beam (I); Attaching the multi-purpose tensioning side protruding fixing block to both sides of the assembled reinforcing beam, and connecting the PC steel while installing the primary tensioning fixture in the predetermined position at both ends of the mold, and up and down for continuity at the upper end of the fixing block After installing the sequential primary and secondary tension anchorages, installing the secondary tension anchorage of the mold at the lower end of the anchoring block, and installing the maintenance anchorage just above the secondary tension anchorage, After installing the reinforcement having a certain length in the upper flange, the step of curing the concrete to make a beam and the first tension (II); Installing the fabricated beams on bridge piers and alternating bridges, and connecting the reinforcement installed in the upper flange with the continuous steel and the high-strength bolt in order to connect the beams and the beams installed adjacent to each other (III); Filling the continuous connection portion with concrete and contacting each other at the side of the beam and the side of the beam by epoxy injection or filling with non-shrink mortar to close the finish (IV); (V) placing and curing the slab after introducing the tension force into the PC steel connected to the sequential primary tension anchorage in the upper end of the fixing block attached to both sides of the beam to perform the sequential primary tension of the beam; Performing secondary tension of the beam by introducing a tension force to the PC steel connected to the secondary tension anchor at the lower end of the anchoring block after curing the slab; It is characterized by consisting of the step (Ⅶ) to introduce the tension force to the PC steel connected to the sequential secondary tension anchorage.

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

Figure 1 is an exemplary view showing a two-span continuous bridge made of a mold fixed to the multi-purpose stretchable side projection fixing block according to the present invention, Figure 2 is an enlarged view showing the connecting portion of Figure 1, Figure 3 It is AA sectional drawing of FIG. 1, FIG. 4 is sectional drawing of BB line of FIG. 1, and FIG. 5 is sectional drawing of CC line of FIG.

As shown in these figures, the mold on which the multi-purpose tensionable side protrusion fixing block is fixed according to the present invention includes a beam 10 including upper and lower flanges 12 and 14 and an abdomen 16; A primary tension fixing device (30) installed to introduce a tension force for tensioning the PC steel (20) at predetermined positions at both ends of the beam (10); A continuous steel member 40 fixedly installed at one end of the upper flange 12 of the beam 10 for continuity of the unit beam 10 having a predetermined size; A reinforcement member 50 fixedly installed in the longitudinal direction on the upper flange 12 of the beam 10; A fixing block (60) protruding from both sides of the end portion of the beam (10) at a predetermined width and width; The lower flange 14 of the beam 10 is fixed to one end of the end reinforcement combined sole plate 70 is composed of.

Bridge construction method using a mold fixed to the multi-purpose tensionable side protrusion fixing block according to the present invention having the configuration as described above step (I) assembling the reinforcing bars to form the beam (10); Attaching the multi-purpose tension side projection fixing block 60 on both sides of the assembled reinforcing beam, connecting the PC steel 20 while installing the primary tension fixing device 30 at both ends of the mold predetermined position, the fixing The continuous primary and secondary tension fixing devices 32 and 34 are installed vertically on the upper end of the block 60, and the secondary tension fixing device 36 of the mold is disposed on the lower end of the fixing block 60. After installing the maintenance anchorage 38 immediately above the secondary tension anchorage 36, a reinforcing material 50 having a predetermined length at one end of the upper flange 12 of the beam 10 After installation, the step of curing the concrete to make the beam 10 and the first tension (II); The fabricated beam 10 is installed in the pier 82 and the alternating 84, and in the central pier 82 in the upper flange 12 to connect the beam 10 and the beam 10 installed adjacently. Connecting the installed reinforcing material 50 to the continuous steel 40 and the high tension bolt 42 to install the continuous connection part 86 (III);

Filling the continuous connection portion 86 with concrete while contacting each other on the side of the beam 10 and the side of the beam 10 by epoxy injection or filling with non-condensation mortar to close the finishing portion (IV);

Tension force is introduced into the PC steel 20 connected to the sequential primary tension fixing device 32 in the upper end of the fixing block 60 attached to both sides of the beam 10, so that the sequential primary tension of the beam 10 is applied. (V) after pouring the slab to cure; (II) applying a tension force to the PC steel 20 connected to the secondary tension fixing device 36 at the lower end of the fixing block 60 after the slab casting curing (VI);

The construction of the structure by sequentially performing the step (Ⅶ) of the continuous secondary tension by introducing a tension force to the PC steel 20 connected to the continuous secondary tension anchorage 34.

Here, after the slab casting curing, the step of introducing the tension force to the PC steel 20 in the continuous secondary tension fixing device 34 in the upper end of the fixing block 60 to add a second tension of the beam (10).

In addition, in the maintenance fixing unit 38 in the lower end of the slab cast curing fixing block 60, the PC steel 20 after inserting the PC steel 20 in the case of sagging or cracking of the mold that may be caused during common use Introduce a tension force to the) to add a further tension to the beam (10).

That is, the bridge construction method using the mold is fixed to the multi-purpose tension side projection fixing block according to the present invention to produce a beam 10 attached to the multi-purpose tension side projection fixing block 60, the beam 10 Is made of any one of a preflux beam, a prestressed concrete beam, a steel plate girder, a steel box girder, and other steel concrete composite girder.

Here, the side protrusion fixing block 60 is manufactured by attaching the beam 10 in a reinforced concrete structure, steel structure, and steel composite structure, but in the case of a steel box girder, the fixing block 60 is attached to the inside of the box. .

In particular, the fixing block 60 is installed on each side of the beam 10 one by one or a plurality of them to be installed on both sides of the beam 10 as necessary.

Subsequently, the beam 10 is mounted on the pier 82 or the alternating 84, and then connected with the reinforcement 50, the continuous steel 40, and the high tension bolt 42, and after setting the stool device 88, The continuous primary tensioning of the beam 10 is performed in the continuous primary tensioning anchorage 32 at the upper end of the side protrusion fixing block 60.

Subsequently, after the slab casting is cured on the beam 10, the secondary tension is applied in the secondary tension fixing unit 36 at the lower end of the side protrusion fixing block 60, and in some cases, in the upper side of the side protrusion fixing block 60. A continuous secondary tension is performed in the continuous secondary tension fixing unit 34.

In this case, when the continuous secondary tension is not performed in the secondary tension fixing device 36, the secondary tension fixing device 36 is used for the continuous maintenance of the beam 10.

Subsequently, epoxy is injected into the beam 10 and the continuous connection portion 86 of the beam 10, or non-shrink mortar is injected to finish the construction of the structure.

Figure 6 is a perspective view showing the reinforcement of the mold is fixed to the side protrusion fixing block according to the present invention, Figure 7 is a side view showing the reinforcement of the mold is fixed to the side protrusion fixing block according to the present invention.

As shown in these figures, the reinforcing material 50 includes a plate body 52 having a predetermined size; Stud bolts 54 are attached to the upper and lower surfaces of the plate body 52; It consists of a perforation 56 formed through the upper and lower surfaces of the plate body 52 between the stud bolts 54.

8A to 8F are exemplary views illustrating various side protrusion fixing blocks of the present invention.

As shown in these figures, the fixing block 60 is protrudingly installed on both sides of the beam 10, and the continuous primary and secondary tensions respectively installed vertically on the upper end of the fixing block 60 for continuity Anchorages (32, 34); A secondary tension fixing unit (36) installed at the lower end of the fixing block (60); It consists of a fixing fixture 38 for the maintenance of the beam 10 fixed to the upper fixing block 60 of the secondary tension fixing unit 36.

In particular, the fixing block 60 is composed of any one of reinforced concrete structure, steel structure, steel composite structure.

In addition, at least one fixing block 60 is attached to both sides of the beam 10.

In addition, the fixing block 60 is formed in any one of the cross-sectional shape of the lozenge, trapezoid, square, triangle, polygon, parallelogram, equilateral trapezoid, isosceles trapezoid, and easily changed to other various shapes Note that it can also be used.

9A to 9J are exemplary views illustrating a form in which a wedge-shaped protruding block is added to various side protrusion fixing blocks of the present invention.

As shown in these figures, the fixing block 60 has a structure in which wedge-shaped protrusions 62 are integrally added to each corner.

That is, the fixing block 60 has a rhombic, trapezoidal, square, and triangular shape as a basic shape, and maintains structural rigidity when fixing the fixing holes 32, 34, 36, and 38 and tensioning the PS steel 20. In order to do this, the wedge-shaped protrusion 62 is selectively added to each corner portion.

Figure 10 is a perspective view showing the end reinforcement combined sole plate of the mold fixed side projection fixing block according to the present invention, Figure 11 shows the end reinforcement combined sole plate of the mold fixed side projection fixing block according to the present invention. One side view.

As shown in these figures, the sole plate 70 includes a horizontal plate 72 arranged horizontally in a predetermined size; A vertical plate 74 attached to one side of the horizontal plate 72 at a right angle; The stud bolt 76 is attached to the plurality of horizontal and vertical plates (72, 74), respectively.

Therefore, the sole plate 70 is installed at both ends of the beam 10 in contact with the teaching device 88 has the effect of reinforcing the end of the beam (10).

Figure 12 is an exemplary view showing a three-span continuous bridge made of a mold fixed to the multi-purpose tension-protruding side projection fixing block according to the present invention.

As shown in this figure, the mold on which the multi-purpose tensionable side protrusion fixing block is fixed according to the present invention includes a beam 10 including upper and lower flanges 12 and 14 and an abdomen 16; A primary tension fixing device (30) installed to introduce a tension force for tensioning the PC steel (20) at a predetermined position at the end side of the beam (10); A continuous steel member 40 fixedly installed at one end of the upper flange 12 of the beam 10 for continuity of the unit beam 10 having a predetermined size; A reinforcement member 50 fixedly installed in the longitudinal direction on the upper flange 12 of the beam 10; A fixing block (60) protruding from both sides of the beam (10) with a predetermined width and width; Is composed of the end reinforcement combined sole plate 70 is fixed to one side end of the lower flange 14 of the beam 10,

The fixing block 60 is installed protruding on both sides of the beam 10,

The fixing block 60 includes fixing fixtures 39a and 39b for maintaining the positive and sub-moment portions installed in the positive moment and the parent moment sections; It consists of a secondary tension anchorage of the mold and a sequential primary tension anchorage (32) installed in the lower portion of the constant moment maintenance fixing unit (39a).

Bridge construction method using a mold fixed to the multi-purpose tension-able side protrusion fixing block according to the present invention having the configuration as described above

Assembling the reinforcing bars to form the beam 10 (I);

Attaching the multi-purpose tension side projection fixing block 60 on both sides of the assembled reinforcing beam, and connecting the PC steel 20 while installing the primary tension fixing device 30 of the mold at predetermined positions on both ends of the mold, The fixing block (39a, 39b) for maintaining the positive and sub-moment portion in the positive moment and the parent moment section of the upper and lower portions of the fixing block 60, and the fixing moment maintenance (39a) After installing the secondary tension anchorage and the sequential primary tension anchor 32 of the mold at the lower end of the, and the reinforcement 50 having a certain length at one end of the upper flange 12 of the beam 10 is installed Casting and curing the concrete to fabricate the beam 10 and firstly tensioning the mold (II);

The fabricated beam 10 is installed in the pier 82 and the alternating 84, and in the central pier 82 in the upper flange 12 to connect the beam 10 and the beam 10 installed adjacently. Connecting the installed reinforcing material 50 to the continuous steel 40 and the high tension bolt 42 to install the continuous connection part 86 (III);

Filling the continuous connection portion 86 with concrete while contacting each other on the side of the beam 10 and the side of the beam 10 by epoxy injection or filling with non-condensation mortar to close the finishing portion (IV);

Tension force is introduced into the PC steel 20 connected to the sequential primary tension fixing device 32 in the upper end of the fixing block 60 attached to both sides of the beam 10, so that the sequential primary tension of the beam 10 is applied. (V) after pouring the slab to cure;

The secondary tension of the beam 10 by introducing a tension force to the PC steel 20 connected to the secondary tension anchorage and the sequential primary tension anchorage 35 in the lower end of the fixing block 60 after the slab casting curing. Step (VI);

The construction of the structure by sequentially performing the step (Ⅶ) of the continuous secondary tension by introducing a tension force to the PC steel 20 connected to the continuous secondary tension anchorage 34.

Therefore, the mold having the multi-purpose tensionable side protrusion fixing block according to the present invention having the above-described configuration and construction is fixed to the fixing holes 39a and 39b for maintaining the positive and minor moments of the fixing block 60. It is installed in the constant moment section and the parent moment section of (10) to generate a parent moment in the positive moment section of the beam, and generate a constant moment in the parent moment section, the generated moment is the dead load and live load of the beam (10) This is to resist the positive and negative moment generated by the process.

Figure 13 is a perspective view showing the end reinforcement combined sole plate of the mold fixed side projection fixing block according to the present invention, Figure 14 shows the end reinforcement combined sole plate of the mold fixed side projection fixing block according to the present invention. 15 is a side view, and FIG. 15 is a side view illustrating a state in which a sole plate is installed in a mold on which a side protrusion fixing block is mounted.

As shown in these figures, the sole plate 70 is formed by bending the steel plate as a whole, the horizontal plate 72 is arranged horizontally to a predetermined size; A vertical plate 74 attached to one side of the horizontal plate 72 at a right angle; A bending plate 75 integrally connected to the vertical plate 74 and bent at a predetermined angle; A perforation portion 78 formed in the bending plate 75; It consists of a fixing plate 79 formed integrally extending from the bending plate to the upper end.

The sole plate 70 is installed at both ends of the beam 10 in contact with the chair device 88 so as to reinforce the end of the beam 10 and at the same time to tension the PC steel 20.

The mold and the bridge construction method in which the multi-purpose tensionable side protrusion fixing block is fixed according to the present invention having the configuration and construction as described above overcome the mechanical limitations of the prestressed concrete beam, and at the same time, the construction is simple. There is an effect that can be applied to the fixing block 60 efficiently in various intervals or a combination thereof.

As described above, the mold and the bridge construction method using the side projection fixing block capable of multi-purpose tension in accordance with the present invention has the following effects.

First, the present invention can increase the length of the bridge as a construction method with excellent construction efficiency and structural efficiency, there is an effect that can be applied regardless of the cross-sectional shape even when the adjacent space is different.

Second, the present invention can effectively control the cracks during the continuous construction of the bridge, there is an effect that can increase the stability and durability.

Third, the present invention has an advantage that the performance of the beam is maintained as it is, even when the slab is replaced due to the aging of the bridge after the installation of the maintenance anchorage selectively.

Claims (17)

delete delete delete delete delete delete delete delete delete A beam 10 composed of upper and lower flanges 12 and 14 and an abdomen 16; A primary tension fixing device (30) installed to introduce a tension force for tensioning the PC steel (20) at a predetermined position at the end side of the beam (10); A continuous steel member 40 fixedly installed at one end of the upper flange 12 of the beam 10 for continuity of the unit beam 10 having a predetermined size; A reinforcement member 50 fixedly installed in the longitudinal direction on the upper flange 12 of the beam 10; A fixing block (60) protruding from both sides of the beam (10) with a predetermined width and width; In the mold with a multi-purpose tensionable side projection fixing block composed of the end reinforcement combined sole plate 70 is fixed to one side end of the lower flange 14 of the beam 10, The sole plate 70 includes a horizontal plate 72 arranged horizontally with a predetermined size; A vertical plate 74 attached to one side of the horizontal plate 72 at a right angle; A bending plate 75 integrally connected to the vertical plate 74 and bent at a predetermined angle; A perforation portion 78 formed in the bending plate 75; A mold having a multi-purpose tensionable side projection fixing block, characterized in that it consists of a fixing plate 79 formed integrally extending from the bending plate to the upper end. delete delete delete delete delete delete delete

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