KR102232461B1 - Reinforcing structure for negative moment part of girder and the construction method thereof - Google Patents

Abstract

The present invention prevents lifting of the reinforced concrete by providing a compression means for compressing and compressing the reinforced concrete, a cover member covering the reinforced concrete, and a cover member covering the reinforced concrete, and the durability of the reinforced concrete and The present invention relates to a reinforcing structure of a negative moment part of a girder structure and a construction method thereof, which can increase compressive stiffness, improve resistance to the negative moment part, and durability of the girder structure, thereby facilitating maintenance.

Description

Reinforcing structure for negative moment part of girder and the construction method thereof

The present invention relates to a girder structure, and more particularly, a reinforced concrete poured into a lower member of the parental portion of the girder structure, a cover member covering the reinforced concrete, and a compression means for compressing and compressing the cover member to lift the reinforced concrete. The present invention relates to a reinforcing structure of a girder structure and a construction method thereof capable of increasing the resistance of the girder structure and its resistance to the negative moment part.

In general, steel girders installed in continuous bridges can effectively respond to tensile forces, but buckling occurs against compressive forces, which can cause collapse of the structure. In addition, although concrete can respond effectively to compressive force, it is weak against tensile force and cracks are easily generated, so the load-bearing capacity of the structure decreases rapidly.

That is, the steel girder is advantageous in a structure subjected to a tensile force, but when subjected to a compressive force, there is a problem that buckling occurs when the thickness of the steel material is thin. In order to solve this problem, the steel material in the part receiving the compressive force can be thickened, but this has a problem that the cost is greatly increased due to the use of expensive steel material.

In addition, the concrete is advantageous in a structure subjected to compressive force, but there is a problem in that when subjected to a tensile force, cracks are generated and the load-bearing force is rapidly reduced.

As a method for solving the above problems, a steel composite steel girder that is synthesized by pouring concrete on the lower flange of the steel girder can be manufactured. Such a steel-composite steel girder has the advantage of not only saving steel and reducing cost, but also preventing buckling of the steel and reducing vibration.

However, in the steel-composite steel girder, it is difficult to completely integrate the concrete to be poured and the lower flange. In addition, moisture may penetrate between the concrete and the girder structure, and the reinforcing bars and steel materials inside the concrete may be corroded. In addition, the infiltrating moisture freezes and melts, and the concrete deteriorates, requiring continuous maintenance.

In order to solve the above problems, in recent years, a bi-span steel girder and a construction method thereof have been registered in Korean Patent Publication No. 10-1573734.

The pre-registered patent is a bi-span steel girder that connects the steel upper flange and the steel lower flange with a pair of steel abdominal parts, and the inter-barrel steel girder, and a reinforcing plate is attached to the side of a plurality of steel diaphragms installed at each point. By attaching it, it was possible to prevent the deterioration of concrete and corrosion of reinforcing bars and steels due to moisture.

However, in the previously registered patent, when the amount of moisture such as rainwater or condensation increases, moisture remains in the inter-barrel steel girder structure for a long time and penetrates to the lower side of the reinforcing plate. In addition, the reinforcing plate only prevents the penetration of moisture, and there is a problem in that it is difficult to fundamentally cope with the large compressive stress acting on the concrete placed in the lower flange of the steel.

Therefore, the penetration of moisture into the concrete poured on the upper side of the steel lower flange is completely prevented, and at the same time, by compressing and reinforcing the concrete from the upper side, the corrosive destruction of the concrete is fundamentally prevented, and the rigidity of the concrete is increased to increase the parental moment of the branch. There is a need to develop a technology that can reinforce wealth dramatically.

Republic of Korea Patent Publication No. 10-1573734

The present invention was conceived to solve the above problems, and provided with reinforced concrete poured into the lower member of the parental portion of the girder structure, a cover member covering the reinforced concrete, and a compression means for compressing the cover member to lift the reinforced concrete. It is intended to provide a reinforcement structure for the negative moment part of a girder structure and a construction method that can prevent this.

In addition, an object of the present invention is to provide a reinforcing structure for the negative moment portion of a girder structure and a construction method thereof, which can increase the structural stability by dramatically increasing the compressive stiffness of the reinforced concrete by compressing the reinforced concrete with a cover member.

In addition, the present invention is to provide a reinforcing structure of the parental portion of a girder structure and a construction method thereof, which is easy to maintain since the common life of the girder structure can be extended by sealing the reinforced concrete with a cover member.

The reinforcing structure of the negative moment part of the girder structure of the present invention is a reinforcement structure for reinforcing the negative moment part of the girder structure seated on a pier, the reinforcement concrete poured into the lower part of the negative moment part of the girder structure; A cover member covering and protecting the reinforced concrete; And a plurality of compression means that are fixed to the lower member at regular intervals to press and compress the reinforced concrete through the cover member.

It further includes; a horizontal connection member installed at the point portion of the parental portion of the girder structure.

The lower member is any one of a lower flange of a box-shaped girder, a lower flange of a U-shaped girder, a lower connecting member connecting a pair of I-shaped girders, and a lower connecting member connecting a pair of truss girders.

It further includes an end finish plate installed in the lower member in the transverse direction at the front and rear ends of the reinforced concrete in the longitudinal direction.

The cover member is formed to cover all or part of the reinforced concrete with a plate-shaped steel plate, and a through hole through which the compression bolt of the compression means passes is formed through.

The compression means may include a lower plate fixed to an upper surface of the lower member; A compression bolt protruding from the lower plate and protruding upward from the cover member; And a compression nut for pressing the cover member with a fastening force fastened to the compression bolt.

It further comprises a; support reinforcing member for reinforcing by radially connecting the lower end of the compression bolt and the lower plate.

It further includes a contact blocking member coupled to the compression bolt to block contact with the reinforced concrete.

It further includes; lubricating oil filled between the contact blocking member and the compression bolt.

Further comprising: a tension portion for reinforcing by tensioning the reinforced concrete, wherein the tension portion, a fixing member protruding from the upper surface of the cover member; A sheath tube embedded in the reinforced concrete in a throttling direction to be connected to the fixing member; And a PS steel material built into the sheath tube and fixed to the fixing member to be tensioned.

In addition, the construction method of the reinforcing structure of the positive moment portion of the girder structure according to the present invention is a construction method for reinforcing the negative moment portion of the girder structure seated on the pier, wherein compression bolts are applied to the lower member of the negative moment portion of the girder structure according to the design drawing. A first step of fixing the protruding lower plate in a lattice shape to be spaced apart at regular intervals, and fixing the end finish plate to the lower member in a horizontal direction outside the lower plate; A second step of installing a cover member while protruding by coupling a through hole of the cover member to an upper end of the compression bolt; A third step of pouring reinforced concrete into a lower member inside the end plate; It may include; a fourth step of compressing the reinforced concrete through the cover member while the compression nut is fastened to the compression bolt.

It further includes a step of coupling a contact blocking member to the compression bolt in the first step.

According to the present invention, the reinforced concrete is provided with a reinforced concrete poured into the lower member of the negative moment portion of the girder structure, a cover member covering the reinforced concrete, and a compression means for compressing the cover member to prevent lifting of the reinforced concrete, thereby preventing the durability and compression of the reinforced concrete. By increasing the rigidity, there is an effect of improving the resistance to the negative moment portion and the durability of the girder structure.

In addition, according to the present invention, by compressing the reinforced concrete with a cover member, there is an effect of remarkably increasing the compressive stiffness of the reinforced concrete to increase structural stability.

In addition, according to the present invention, by sealing the reinforced concrete with a cover member, the common life can be extended without damaging the function of the girder structure, thereby facilitating maintenance.

1 is an exploded perspective view of the compression means of the reinforcing structure of the negative moment portion of the girder structure to which the present invention is applied
2 is a cross-sectional view of FIG. 1
3 is a plan configuration diagram of FIG. 1
4 to 6 are views showing a state in which the reinforcing structure of the positive moment portion of the girder structure according to the present invention is applied to the U-shaped girder
7 is a view showing another embodiment of the reinforcing structure of the negative moment portion of the girder structure of the present invention
8 to 9 are views showing a state in which the reinforcing structure of the positive moment portion of the girder structure of the present invention is applied to a pair of I-type girders
10 to 11 are views showing a state in which the reinforcing structure of the positive moment portion of the girder structure of the present invention is applied to a pair of truss girders
12 to 13 are enlarged views of the reinforcing structure of the negative moment portion of the girder structure to which the present invention is applied
14 to 15 are views showing another embodiment of the reinforcing structure of the negative moment portion of the girder structure according to the present invention

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, the same elements are assigned the same numerals as possible, even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related well-known configuration or function interferes with an understanding of an embodiment of the present invention, a detailed description thereof will be omitted.

In addition, in describing the constituent elements of an embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but another component between each component May be “connected”, “coupled” or “connected”.

1 is an exploded perspective view of a compression means of a reinforcing structure of a negative moment portion of a girder structure to which the present invention is applied, FIG. 2 is a cross-sectional view of FIG. 1, and FIG. 3 is a plan view of FIG.

The reinforcing structure 100 of the positive moment portion of the girder structure according to the present invention is a reinforcing structure for reinforcing the negative moment portion of the girder structure seated on the pier, and includes reinforced concrete 110, a cover member 120, and a compression means 130 do.

The reinforced concrete 110 is a configuration that is poured into the lower member 10 of the negative moment portion of the girder structure, and may include conventional concrete or high-strength concrete having a compressive strength of 40 Mpa (megapascal) or more. The reinforced concrete 110 may be poured over the entire parental portion or may be poured into the central portion having a large parental moment.

Here, the girder structure may be any one of a box-shaped girder, a U-shaped girder, an I-shaped girder, and a truss girder. In the case of a boxed or U-shaped girder, both abdomens may be corrugated steel sheets.

In addition, the lower member 10 is a lower flange of the box-shaped girder, the lower flange of the U-shaped girder, a lower connecting member seated and fixed to the lower flange of the I-shaped girder adjacent to the I-shaped girder, and the truss girder and neighboring It may be a lower connecting member that is seated and fixed to the lower chord of a truss girder.

A shear connector 110a may be formed to protrude from an upper surface of the lower member 10 or a lower surface of the cover member 120.

In addition, an end finish plate 111 may be installed on the lower member 10 in the transverse direction at the longitudinal front and rear ends of the reinforced concrete 110 to maintain the shape of the reinforced concrete 110 by pouring concrete.

The end finish plate 111 is formed by concave portions 111a in the center direction, that is, in the horizontal connection member 140 direction, or the finish reinforcing plate 111b protrudes or bends to be buried in the reinforced concrete 110 As a result, it is possible to resist the compressive force of the reinforced concrete 110 well.

The cover member 120 may cover all or part of the reinforced concrete 110 and includes a body 121 and a through hole 122. When the cover member 120 covers the entire reinforced concrete 110, it is possible to increase durability by completely blocking moisture from flowing into the reinforced concrete 110.

The body 121 is a body formed of a plate-shaped steel plate. The through hole 122 is formed through the compression bolt 132 of the compression means 130 to protrude.

In addition, it further includes a stress transmission connection plate 123 bent at both ends of the body 121 of the cover member 120, the stress transmission connection plate 123 is bent downward at both ends of the body 121 to close the end By being seated on the plate 111, it is possible to prevent the end of the reinforced concrete 110 from being damaged, and to prevent the inflow of moisture between the cover member 120 and the reinforced concrete 110.

The compression means 130 is configured to compress and compress the reinforced concrete 110 through the cover member 120, and includes a lower plate 131, a compression bolt 132, and a compression nut 133.

The lower plate 131 is a plate material fixed to the upper surface of the lower member 10 by welding or the like.

The compression bolt 132 is a bolt protruding from the lower plate 131 to which the compression nut 133 is fastened.

The compression nut 133 is a nut that is fastened to the compression bolt 132 and presses the cover member 120 with a fastening force that is fastened to the compression bolt 132.

In addition, it may further include a support reinforcing member 134 for reinforcing by radially connecting the lower end side of the compression bolt 132 and the upper surface of the lower plate 132.

In addition, a bolt coupling member may be further provided between the compression bolt 132 and the support reinforcing member 134. The bolt coupling member is formed with a screw on the inside so that the compression bolt 132 can be easily screwed. In addition, the compression bolt 132 may be additionally welded after being screwed to the bolt coupling member.

In addition, it may further include a contact blocking member 135 that is coupled to the compression bolt 132 to block contact with the reinforced concrete 110, and the contact blocking member 135 is formed through the inside.

In addition, lubricant may be filled between the contact blocking member 135 and the compression bolt 132. The lubricant can prevent corrosion of the compression bolt 132 during long-term use.

In addition, a horizontal connection member 140 may be installed at a point of the parental portion of the girder structure, and the horizontal connection member 140 may include a plate-shaped diaphragm or bracing.

A vertical stiffener 141 may be coupled in a vertical direction before and after the horizontal connection member 140. The vertical stiffener 141 may be formed as wide as the width of the bridge support from the lower member 10 to a certain height above the upper part, and gradually decrease the width at the upper portion thereof to be connected to the upper member corresponding to the lower member 10. The horizontal connection member 140 and the vertical stiffener 141 can prevent punching destruction that may occur by the bridge support.

In addition, it further includes a tension portion 150 for reinforcing the reinforced concrete 110 by tension, and the tension portion 150 includes a fixing member 151, a sheath pipe 152, and a PS steel material 153. .

The fixing member 151 is installed protruding from the point portion to the upper surface of the cover member 120 to guide the fixing of the PS steel material 153.

The sheath pipe 152 may be embedded in the reinforced concrete 110 in a throttling direction so as to be connected to the fixing member 151, and the PS steel material 153 may be inserted therein.

The PS steel material 153 is built in the sheath pipe 152 and is installed to be fixed to the fixing member 151, and cracks can be suppressed by reinforcing the base plate at the branch. The PS steel 153 may be additionally fixed to the end side of the reinforced concrete 110, that is, the end finish plate 111 side. This may further increase the rigidity of the reinforced concrete 110.

The following describes the construction process of the reinforcing structure 100 of the negative moment portion of the girder structure of the present invention configured as described above.

First, a compression bolt 132 of a certain length according to the design drawing is fixed vertically to the lower plate 131, and the lower side of the compression bolt 132 and the upper surface of the lower plate 131 are used as a support reinforcing member 134. In the connection-fixed state, the lower plate 131 is welded and fixed to the lower member 10 of the negative moment portion of the girder structure in a grid shape at regular intervals.

At this time, the compression bolt 132 may be coupled with a contact blocking member 135 through which the inside is penetrated, or a lubricant may be filled between the combined contact blocking member 135 and the compression bolt 132. The lubricating oil is buried in the compression bolt 132 to block contact with air, thereby preventing corrosion of the compression bolt 132 during long-term use.

Here, the compression bolt 132 has been described as being directly connected and fixed to the lower plate 131, but a bolt coupling member is fastened to the lower end of the compression bolt 132, and the bolt coupling member and the lower plate are welded to each other, or the The bolt coupling member and the lower plate may be welded and fixed with the support reinforcing member 134.

The lower plate 131 to which the compression bolts 132 are connected and fixed is fixed to the lower member 10 of the girder structure in a grid shape at regular intervals by welding or the like.

The girder structure is a structure including a box-shaped girder, a U-shaped girder, a pair of I-shaped girders, and a pair of truss girders, and the lower member 10 is a lower flange of the box-shaped girder, It may be any one of a lower flange of the U-shaped girder, a lower connecting member connecting the lower flanges of the pair of I-shaped girders, and a lower connecting member connecting the lower chords of the pair of truss girders.

An end finish plate 111 is installed in the transverse direction to the lower member 10 to which the lower plate 131 is fixed. The end finish plate 111 is formed by concave portions 111a are concave therein, or the finish reinforcing plate 111b is formed or attached by bending toward the end of the lower member 10 on which the reinforced concrete 110 is poured. Can be formed.

The lower plate 131 and the end finish plate 111 are fixed to the lower member 10 and the end of the girder structure is seated on the pier, and the diaphragm is placed between the girder structures seated on the pier, that is, at the point of the parental portion of the girder structure. Alternatively, a horizontal connection member 140 of the bracing is installed.

It has been described that the girder structure is seated on the pier while the lower plate 131 and the end finish plate 111 are installed and fixed to the lower member 10, but the girder structure is seated on the pier, and the girder is mounted on the pier. The lower plate 131 and the end finish plate 111 may be installed and fixed to the lower member 10 of the structure.

In addition, as shown in FIG. 6, a vertical stiffener 141 is installed in a vertical direction before and after the horizontal connection member 140, which is formed as wide as the width of the bridge support from the lower member 10 to a certain height above the upper part. By gradually decreasing the width and connecting it to the upper member corresponding to the lower member 10, shear punching destruction that may occur during long-term use with the reinforced concrete 110 at the upper part of the bridge support having the greatest point reaction force is prevented, and By smoothing the flow of the point reaction force, it is possible to extend the life of the bridge by fundamentally preventing damage to the reinforced concrete 110 formed by pouring.

And while moving the cover member 120 from the top of the end plate 111 to the bottom, the compression bolt 132 protrudes into the through hole 122 of the cover member 120, and the stress transmission connection plate of the cover member 120 ( 123) A space is formed between the cover member 120 and the lower member 10 while the bottom surface is seated on the upper surface of the end finish plate 111.

In order to form the reinforced concrete 110 by pouring concrete, the cover member 120 may have an injection hole and a discharge hole through which air is discharged.

The reinforced concrete 110 has been described as being poured while the cover member 120 is seated on the end finish plate 111, but the lower member 10 inside the end finish plate 111 is After pouring to form the reinforced concrete 110, the cover member 120 may be covered.

When concrete is poured into the lower member 10 to which the end finish plate 111 is fixed, the finish reinforcement plate 111b protruding from the end finish plate 111 is buried in the reinforced concrete 110 to be cured. . The reinforced concrete 110 may be installed in the entire portion of the negative moment portion of the branch portion or may be poured in a portion of the portion of the negative moment portion having a large positive moment.

At this time, as shown in FIG. 7, a shear connector 110a protrudes on the upper surface of the lower member 10, and one or more concave portions 111a are concave in the end finish plate 111 to form reinforced concrete 110. Since it is supported, it can well resist the compressive force in the longitudinal direction of the reinforced concrete 110.

Here, it is possible to prevent shear punching destruction of the reinforced concrete 110 by installing a shear punching reinforcing material 110b inside the reinforced concrete 110.

In addition, when the shear connector 110a protrudes from the bottom of the cover member 120 to be described below to cover the cover member 120 on the poured concrete, and the concrete is cured to form reinforced concrete, the reinforced concrete 110 ) By being buried in it may well respond to the compressive force of the reinforced concrete (110).

Although the force of the concrete poured into the lower member 10 is transmitted to the compression bolt 132, the compression bolt 132 is supported by the support reinforcing member 134 connected to the lower plate 131 and fixed. It is possible to prevent the occurrence of bending of (132) and to maintain the vertical state.

Here, the upper end of the end finish plate 111 may be positioned lower than the upper end of the compression bolt 132 so that the upper surface of the reinforced concrete 110 may be positioned lower than the compression bolt 132.

When the reinforced concrete 110 is cured in the lower member 10, the cover member 120 is moved from the top to the bottom of the reinforced concrete 110, and the through hole 122 of the cover member 120 is a compression bolt At the same time as being coupled to (132), the upper surface of the compression bolt 132 protrudes through the through hole 122, so that the bottom surface of the body 121 is seated on the upper surface of the reinforced concrete 110.

When the bottom surface of the body 121 is seated on the upper surface of the reinforced concrete 110, the compression nut 133 is fastened to the upper portion of the compression bolt 132 protruding through the through hole 122 as shown in FIGS. 12 to 13 And, while the fastening force of the compression nut 133 fastened to the compression bolt 132 is transmitted to the cover member 120, the cover member 120 presses and compresses the reinforced concrete 110. The compression nut 133 may be additionally fastened after the reinforced concrete 110 is completely hardened.

At this time, a contact blocking member 135 is coupled to the compression bolt 132 to block contact with the reinforced concrete 110, or the compression bolt 132 and the reinforced concrete 110 generated by removing the contact blocking member 135 ), the contact with the reinforced concrete 110 can be blocked by the gap between the cover member 120 and the reinforced concrete 110 can be compressed by the fastening force of the compression nut 133. In addition, a washer may be installed between the compression bolt 132 and the compression nut 133.

By fastening the compression nut 133 to the compression bolt 132 to compress the reinforced concrete 110, damage of the reinforced concrete 110 or punching shear destruction due to a large compressive force generated at the point can be completely prevented. have.

In addition, the lifting of the cover member 120 and the reinforced concrete 110 is completely prevented, and the inflow of rainwater, etc. is prevented, so that resistance to negative moments is increased and the durability of the girder structure can be improved. It is possible to dramatically increase the stability of the point of the structure.

The stress transmission connection plate 123 formed horizontally or inclinedly formed on both sides of the body 121 of the cover member 120 is seated on the end plate 111 and sealed, or the stress transmission connection plate 123 and the end plate It is possible to prevent the inflow of moisture between the cover member 120 and the end plate 111 by welding and fixing it to 111 and sealing it.

On the other hand, as shown in Figs. 14 to 15, after installing the sheath pipe 152 before concrete pouring, or installing the sheath pipe 152 in which the PS steel material 153 of the tension portion 150 is embedded, the concrete is poured and It can be cured to form the reinforced concrete 110. In a state in which the cover member 120 is seated on the upper surface of the reinforced concrete 110 by the above process, the reinforced concrete 110 is compressed by a compression means 130, and the PS steel material 153 is tensioned with a tensioner to fix the fixing member. By fixing and reinforcing the reinforced concrete 110, the occurrence of cracks in the reinforced concrete 110 may be doubled.

In the above, even if all the constituent elements constituting the embodiments of the present invention have been described as being combined into one or operating in combination, the present invention is not necessarily limited to these embodiments. That is, within the scope of the object of the present invention, all of the constituent elements may be configured or operated by selectively combining one or more. In addition, terms such as "include", "consist of" or "have" described above mean that the corresponding component may be present unless otherwise stated, excluding other components. It should not be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art, unless otherwise defined, to which the present invention belongs. Terms generally used, such as terms defined in the dictionary, should be interpreted as being consistent with the meaning of the context of the related technology, and are not interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: reinforcement structure of the parent-moment part 110: reinforced concrete
120: cover member 130: compression means
140: horizontal connection member 150: tension portion

Claims (12)

As a reinforcement structure that reinforces the negative moment of the girder structure seated on the pier
Reinforced concrete poured into the lower member of the parental portion of the girder structure;
A cover member covering and protecting the reinforced concrete; And
Including; a plurality of compression means that are fixed to the lower member at regular intervals to press and compress the reinforced concrete through the cover member,
The compression means,
A lower plate fixed to the upper surface of the lower member;
A compression bolt protruding from the lower plate and protruding upward from the cover member; And
Includes; a compression nut for pressing the cover member with a fastening force fastened to the compression bolt,
The cover member is formed to cover all or part of the reinforced concrete with a plate-shaped steel plate, and a through hole through which the compression bolt of the compression means passes is formed,
A contact blocking member coupled to the compression bolt to block contact with the reinforced concrete; the reinforcing structure of the parental portion of the girder structure further comprising. The method according to claim 1,
The reinforcing structure of the positive moment portion of the girder structure further comprising a; horizontal connecting member installed at the point portion of the negative moment portion of the girder structure. The method according to claim 1,
The lower member is one of a lower flange of a box-shaped girder, a lower flange of a U-shaped girder, a lower connecting member connecting a pair of I-shaped girders, and a lower connecting member connecting a pair of truss girders. Section reinforcement structure. The method according to claim 1
The reinforcing structure of the parent moment portion of the girder structure further comprising an end finish plate installed in the lower member in the transverse direction at the longitudinal front and rear ends of the reinforced concrete. delete delete The method according to claim 1,
The reinforcing structure of the parental portion of the girder structure further comprising a; support reinforcing member for reinforcing by radially connecting the lower end of the compression bolt and the lower plate. delete The method according to claim 1,
Lubricating oil filled between the contact blocking member and the compression bolt; reinforcing structure of the positive moment portion of the girder structure further comprising. The method according to claim 1,
Further comprising a; tension portion for reinforcing by tensioning the reinforced concrete,
The tension part
A fixing member protruding from an upper surface of the cover member;
A sheath tube embedded in the reinforced concrete in a throttling direction to be connected to the fixing member; And
The reinforcing structure of the negative moment portion of the girder structure comprising a; PS steel material that is embedded in the sheath pipe and is fixed to the fixing member to be tensioned. As a construction method of the reinforcing structure of the negative moment portion of the girder structure according to any one of claims 1 to 4, 7, 9 to 10,
According to the design drawing, the lower plate on which the compression bolts protrude from the lower member of the negative moment part of the girder structure are fixed in a grid shape to be spaced apart at regular intervals, and the end finish plate is laterally fixed to the lower member outside the lower plate. Step 1;
A second step of installing the cover member while protruding by engaging the through hole of the cover member to the upper end of the compression bolt;
A third step of pouring reinforced concrete into the lower member inside the end plate;
A fourth step of compressing the reinforced concrete through the cover member while the compression nut is fastened to the compression bolt. The method of claim 11,
In the first step, coupling the contact blocking member to the compression bolt. Construction method of the reinforcing structure of the parental portion of the girder structure further comprising.

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