KR102205685B1 - Method for Reinforcing Box type Concrete structure - Google Patents

Abstract

The present invention relates to a method for reinforcing a box-type reinforced concrete structure, and more particularly, to a method for reinforcing a box-type reinforced concrete structure by pressing a curved reinforcement material in a simple manner and bonding it to an upper slab.
The present invention provides a method for reinforcing an upper slab of a box-type reinforced concrete structure, comprising: a reinforcing material manufacturing step of manufacturing a reinforcing material of a steel material in which an upper camber is formed when installed and a bolt hole is provided at the center and both ends; Anchor bolt installation step of installing anchor bolts at both ends and center portions of the upper slab of the box-type reinforced concrete structure; A first coupling step of passing the anchor bolt through the bolt hole of the reinforcing material and then fastening the nut to the anchor bolt at the central portion to couple the reinforcing material to the upper slab; A nut fastening step of fastening nuts to each of the anchor bolts passing through the bolt holes at both ends of the reinforcing material; A rod in which a first pressing member including a nut-shaped fastening member and a rod-shaped extension member fixed to the fastening portion, and a mounting member that can be supported by the extension member is provided at the center and a rotatable wheel is coupled at one end A pressing member providing step of providing a second pressing member of the form; After the nut fastening step, while the fastening member of the first pressing member is fastened to the anchor bolts passing through the bolt holes at both ends of the reinforcing member, the mounting member of the second pressing member is attached to the extension member of the first pressing member. It is mounted and supported, and a force is applied to the other end of the second pressing member in a downward direction while the wheel is in contact with the reinforcing member, so that the end of the reinforcing member is in close contact with the upper slab, and the nut fastened in the nut fastening step is moved upward. A second coupling step of moving and coupling the end of the reinforcing material to the upper slab; And a pressing member removing step of removing the first pressing member and the second pressing member.

Description

Method for reinforcing box type concrete structure {Method for Reinforcing Box type Concrete structure}

The present invention relates to a method for reinforcing a box-type reinforced concrete structure, and more particularly, to a method for reinforcing a box-type reinforced concrete structure by pressing a curved reinforcement material in a simple manner and bonding it to an upper slab.

In general, box-type reinforced concrete structures that are buried underground, which are used for the purpose of underground roadways, subways, waterways, etc., have a load (self weight of the soil to be filled) or roads that are newly constructed by filling the top (ground). There are cases in which a larger load than the design load is applied due to the applied traffic load.

As such, structural safety may be impaired due to excessive shearing force and abutment at the side wall in the vertical direction, the right leg, or the ceiling (upper slab), which is the corner between the ceiling and the side wall, due to the load acting larger than the design load. have. Therefore, there are cases in which the right leg or ceiling of a box-type reinforced concrete structure needs to be structurally reinforced.

Korean Patent Nos. 10-1338767, 10-1416204, and 10-1744458 have been proposed as techniques for reinforcing the right leg, and it is determined that the reinforcement can be relatively effective.

A number of technologies for reinforcing the ceiling have also been applied and registered, but Korean Patent No. 10-352646 has developed and applied for a device that combines an elastic reinforcement (steel) bent to have a camber to the structure and reinforces the structure by the elastic resilience of the elastic reinforcement. Was registered.

It is not easy to bond cambered steel to a concrete structure. After installing anchor bolts in concrete and forming long-hole-shaped through-holes in steel, the nut must be tightened while the anchor bolts are inserted into the through-holes, and as few as hundreds of kilograms, as many as several tons of force must be applied. Usually, the reinforcing material is combined by fixing the central part and then fixing both ends. There is no problem in combining the central part, but the bonding work of both ends is difficult.

First of all, since the nut is in a hexagonal shape rather than a circular shape, it is difficult to rotate due to friction with the steel material, and the reinforcement material is bent, so if one side is fixed first, the distance from the ceiling on the other side increases, making it difficult to join the other side. It should be done, but in reality it is very difficult to do such work in a narrow space.

Due to this feature, a number of technologies using a camber-formed reinforcement, which have been filed/registered after the registration of the aforementioned Patent No. 10-352646, are patents characterized by a method of bonding the reinforcement to a structure. Registered Patent No. 10-1658390 takes a method of combining the brackets at both ends (corners) of the upper slab, and then using a hydraulic jack and a support to form a stiffening material with a camber on the bracket in a state in which a bulge is formed on the upper slab. It is an invention, and Patent No. 10-1686993 fixes the bracket member to the wall of a box-type reinforced concrete structure, installs a hydraulic jack on the bracket member, and then presses the camber-formed reinforcement using a hydraulic jack to form a camber-formed reinforcement on the upper slab. It is a way to combine.

The method of applying force to the camber-formed reinforcement in these inventions mainly uses a hydraulic jack, and a lower slab is used as the reaction force of the hydraulic jack or a bracket member is installed.When the lower slab is used as a reaction force, the inner height of the box-type reinforced concrete structure Since it is necessary to use a rod similar to that, the operation is cumbersome and unstable, and even when the bracket member is installed, there is a disadvantage that a lot of effort and cost are required to install the bracket member.

The present invention was conceived to solve the problems of the background art, and the problem to be solved by the present invention is to provide an improved method for reinforcing a box-type reinforced concrete structure so that it can be fixed by pressing and fixing a camber-formed reinforcement material will be.

The present invention as a means of solving the above problems,

In the method for reinforcing the upper slab of a box-type reinforced concrete structure,

A reinforcing material manufacturing step of manufacturing a reinforcement material of a steel material in which the upper camber is formed when installed and the bolt holes are provided at the center and both ends;

Anchor bolt installation step of installing anchor bolts at both ends and center portions of the upper slab of the box-type reinforced concrete structure;

A first coupling step of passing the anchor bolt through the bolt hole of the reinforcing material and then fastening a nut to the anchor bolt at the central portion to couple the reinforcing material to the upper slab;

A nut fastening step of fastening nuts to each of the anchor bolts passing through the bolt holes at both ends of the reinforcing material;

A first pressing member comprising a nut-shaped fastening member and a rod-shaped extension member fixed to the fastening member,

A pressing member providing step of providing a second pressing member in the form of a rod in which a mounting member capable of being supported by the extension member is provided in the center and a rotatable wheel is coupled at one end thereof;

After the nut fastening step, while the fastening member of the first pressing member is fastened to the anchor bolts passing through the bolt holes at both ends of the reinforcing member, the mounting member of the second pressing member is attached to the extension member of the first pressing member. It is mounted and supported, and a force is applied to the other end of the second pressing member in a downward direction while the wheel is in contact with the reinforcing member, so that the end of the reinforcing member is in close contact with the upper slab, and the nut fastened in the nut fastening step is moved upward. A second coupling step of moving and coupling the end of the reinforcing material to the upper slab; And,

It provides a method for reinforcing a box-type reinforced concrete structure comprising a; pressing member removing step of removing the first pressing member and the second pressing member.

It is preferable that the second bonding step is carried out together at both ends of the reinforcing material.

It is preferable that the reinforcing material includes a vertical plate cut in a form in which a camber is formed and a horizontal plate in the form of a curved flat plate coupled to one side of the vertical plate.

It is preferable to further include a curved flat plate type horizontal plate coupled to the other side of the vertical plate.

It is preferable that the horizontal plate has a relatively wide shape in the center, and further includes a vertical plate perpendicular to the vertical plate.

It is more preferable that the vertical plate is provided with a pair.

It is preferable that the reinforcing member adjusts the force acting on the upper slab by adjusting the degree to which the nut is moved upward while checking the distance between the upper slab and the nut in the second bonding step.

It is preferable that a length adjusting means is provided between the mounting member and the other end of the second pressing member.

It is more preferable that a portion of the vertical plate coupled to the horizontal plate has a parabolic shape.

According to the present invention, it is possible to provide an improved method for reinforcing a box-type reinforced concrete structure to provide a pressing force by pressing a reinforcing member having a camber formed thereon in a simple method without a separate reaction force and fixing it to the structure.

1 is an exploded perspective view of an embodiment of a reinforcing material used in the present invention.
2 (a) to (c) are a perspective view, a plan view, and a side view of the reinforcing material shown in FIG. 1, respectively.
Figure 3 is a view showing a state in which anchor bolts for coupling reinforcement to the upper slab of a box-type reinforced concrete structure are installed.
4 is a view for explaining the first coupling step.
5 is a view showing a state in which the first pressing member is installed on the anchor bolt.
6 is a view for explaining the first pressing member shown in FIG. 5.
7 is a view showing a state in which the second pressing member is installed.
8 is a view for explaining the second pressing member shown in FIG. 7.
9A and 9B are views for explaining a relative position between a wheel and a vertical member.
10 is a view for explaining a second pressing step.
11 is a view showing a state in which a reinforcing member is installed on an upper slab of a box-type reinforced concrete structure and the first pressing member and the second pressing member are removed.
12A to 12E are views each showing another embodiment of a reinforcement.

Hereinafter, by describing one preferred embodiment of the present invention with reference to the drawings, specific details for carrying out the present invention will be provided.

1 is an exploded perspective view of one embodiment of a reinforcing material used in the present invention, FIGS. 2a to 2c are a perspective view, a plan view and a side view of the reinforcement shown in FIG. 1, respectively, and FIG. 3 is a box-type reinforced concrete structure A view showing a state in which an anchor bolt for coupling a reinforcing material to the upper slab of is installed, FIG. 4 is a view for explaining a first coupling step, and FIG. 5 is a view showing a state in which a first pressing member is installed on the anchor bolt, FIG. 6 is a view for explaining the first pressing member shown in FIG. 5, FIG. 7 is a view showing a state in which the second pressing member is installed, and FIG. 8 is a view for explaining the second pressing member shown in FIG. 7 9A and 9B are views for explaining the relative position between the wheel and the vertical member, FIG. 10 is a view for explaining the second pressing step, and FIG. 11 is a reinforcing material installed on the upper slab of the box-type reinforced concrete structure A view showing a state in which the first pressing member and the second pressing member are removed, and FIGS. 12A to 12E are views showing another embodiment of a reinforcing member, respectively.

A method for reinforcing a box-shaped structure according to one preferred embodiment of the present invention includes a step of manufacturing a reinforcement material, an anchor bolt installation step, a first coupling step, a nut fastening step, a pressure member preparing step, a second coupling step, and a pressure member removing step. It is done by doing. The box-type reinforced concrete structure 100 (refer to FIG. 3) is a configuration that is buried underground used for purposes such as underpasses, subways, and waterways, as described in the background art, and the upper slab 110, the wall 120 and the lower slab (Not shown in the drawings).

The reinforcing material manufacturing step is a step of preparing a reinforcing material of a steel material in which an upper camber is formed when installed and a bolt hole 13 is provided at the center and both ends. In this embodiment, as shown in FIGS. 1 and 2 It is composed of a vertical plate 12 and a horizontal plate 11, the bolt hole 13 is formed in the horizontal plate (11).

As shown in FIG. 1, the vertical plate 12 is a plate cut in a form in which a camber is formed, and the horizontal plate 11 is a plate in the form of a curved flat plate. The vertical plate 12 and the horizontal plate 11 are joined by welding.

A portion of the vertical plate 12 coupled to the horizontal plate 11 has a parabolic shape. When configured in a parabolic shape, there is an advantage of being able to load an equally distributed load on the upper slab 110.

Another embodiment of the reinforcement 10 is shown in Figs. 12A-12E.

The reinforcing material 10a shown in FIG. 12A; denoted as 10a is for discrimination from the reinforcement material indicated by 10 in FIG. 1) is perpendicular to each other on the horizontal plate 11a and the horizontal plate 11a in the form of a cross. It consists of two pairs of vertical plates 12a intersectingly coupled to each other, and the bolt hole 13a is formed on the horizontal plate 11a. Although not shown, the vertical plate 12a has a curved shape as shown in FIG. 1 so that a camber can be formed. Depending on the situation of the site, the vertical plate in the longitudinal direction (left and right direction in the drawing) is a shape that is bent to form a camber, and the vertical plate in the direction perpendicular to the longitudinal direction (in the vertical direction in the drawing) may be manufactured in a flat plate shape.

The reinforcing material 10b shown in FIG. 12B is composed of a horizontal plate 11b in which the width of the central portion is relatively larger than the width of the end portion and a pair of vertical plates 12b coupled to the horizontal plate 11b. The ball 13b is also formed on the horizontal plate 11b. The vertical plate 12b shown in FIG. 12B is also not shown, but the vertical plate 12a is curved as shown in FIG. 1 so that a camber can be formed.

The reinforcing material 10c shown in FIG. 12C differs from the reinforcing material 10 shown in FIG. 1 in the shape of the camber. In the case of the reinforcing member 10 shown in FIG. 1, the upper part of the vertical member 12 is in the form of a parabolic line, and the vertical member 12c of the reinforcing member 10c shown in FIG. 12c has three flat plates installed at a certain angle. It is a form that is coupled to the horizontal plate (11c). Although not shown, a bolt hole is formed on the horizontal plate 11c. Meanwhile, the camber shape of the reinforcing members 10a and 10b shown in FIGS. 12A or 12B may also be manufactured in the same manner as the camber shape formed in FIG. 12C.

12D is a cross-sectional view of another type of reinforcing member 10d, and the camber may have the shape shown in FIG. 1 or 12C. One vertical plate 11d is used, and two horizontal plates 11d are used. As a shape, it has a cross-section similar to that of an I-beam.

12E is a cross-sectional view of another type of reinforcing member 10e. The camber may be in the form shown in FIGS. 1 or 12C. A horizontal plate 11e and a vertical plate 12e are used in pairs. Overall, it has a hat-shaped cross section.

The anchor bolt installation step is a step of installing anchor bolts at both ends and the center of the upper slab 110 of the box-type reinforced concrete structure 100 as shown in FIG. 3. For convenience, it will be referred to as a central anchor bolt 20a installed in the central portion and an end anchor bolt 20b installed at both ends. The method of installing the anchor bolts 20a and 20b is well understood by an average technician in the technical field to which the present invention belongs, and thus a description thereof will be omitted.

In the first coupling step, the anchor bolts 20a and 20b are passed through the bolt hole 13 of the reinforcing member 10, and then the nut 30a is fastened to the central anchor bolt 20a to fix the reinforcing member 10. It is a step of bonding to the upper slab 110. The state in which the first combining step is completed is shown in FIG. 4. The configuration indicated by reference numeral 40 in FIG. 4 is a ruler for measuring the length. The ruler 40 will be described below in the section describing the second coupling step.

The nut fastening step is a step of fastening the nuts 30b to the end anchor bolts 20b passing through the bolt holes 13 at both ends of the reinforcing member 10. The nut 30b needs to be rotated only to the extent that it can be rotated by manpower. 4 shows a state in which the nut 30b is fastened.

The step of preparing the pressing member is a step of providing the first pressing member 50 and the second pressing member 60.

As shown in FIGS. 5 and 6, the first pressing member 50 includes a nut-shaped fastening member 51 and a rod-shaped extension member 52 coupled to the fastening member. In this embodiment, the extension member 52 has a cylindrical shape.

5 shows a state in which the fastening part of the first pressing member 50 is fastened to the end anchor bolt 20b.

As shown in FIG. 8, the second pressurizing member 60 has a rod-shaped configuration in which a mounting member 62 is provided at a central portion and a wheel 61 rotatably coupled to one end thereof is coupled. In this embodiment, the mounting member 612 has a shape corresponding to a part of a circle as a whole, but it may be made into a circle and inserted into the extension member 52 to be used.

A length adjusting means 63 is provided between the mounting member 62 and the other end of the second pressing member 60, so that the length can be increased or decreased. As a length adjusting means, various configurations such as a turnbuckle or a screw may be used.

The second pressing step is performed by applying a force in the direction of the upper slab 110 to the reinforcing member 10 using the first pressing member 50 and the second pressing member 60 described above after the nut fastening step. ) Is in close contact with the upper slab 110.

As shown in Figure 7, the second pressing member 60 in a state in which the first pressing member 50 is temporarily fixed by fastening the fastening member 51 of the first pressing member 50 to the end anchor bolt 20b. The other end of the second pressurizing member 60 (wheel 61 is formed in a state in which the mounting member 62 is mounted on the extension member 52 to be supported, and the wheel 61 is in contact with the reinforcing member 10). The end of the reinforcement 10 is in close contact with the upper slab 110 by applying a downward force to the opposite end of the end).

In order to secure a space between the mounting member 62 and the wheel 61, the connecting member 52 of the first pressing member 50 serves as a force action point, and as shown in the drawing, the end anchor bolt 20b is It is desirable to make it relatively long.

Applying force to the second pressurizing member 60 may be performed by manpower or a heavy object (not shown). If necessary, a hydraulic jack is installed between the upper slab 110 and the second pressurizing member 60 to increase force. You can also add. In the case of using a heavy object, there is an advantage of being able to adjust the pressing force acting on the reinforcement 10 by using a heavy object having its own weight as much as the load to pressurize the reinforcement 10 required.

At this time, the longer the distance from the mounting portion 62 of the second pressing member 60 to the other end, the less force can be used. Therefore, when increasing the length using the length adjusting portion 63, it is recommended to pressurize by manpower. It also happens when possible.

If the first pressing member 50 and the second pressing member 60 are used one by one, the wheel 61 is positioned between a pair of vertical members 12 as shown in FIG. Can be used as a guide. When the first pressing member 50 and the second pressing member 60 are used in pairs, as shown in FIG. 9B, the wheel 61 is positioned outside the vertical member 12 to guide the vertical member 12. You can also use it.

When the reinforcing material 10 is in close contact with the upper slab 110, use a ruler 40 to check the distance between the end of the reinforcing material 10 and the upper slab 110 and move the nut 30b fastened in the nut fastening step upward. By moving to the end of the reinforcement 10 is coupled to the upper slab (110). The pressing force applied to the upper slab 110 by the reinforcing material 10 can be adjusted according to the degree to which the end of the reinforcing material 10 is in close contact with the upper slab 110, so the end of the reinforcing material 10 and the end of the reinforcing material 10 through structural calculation in advance can be adjusted. After calculating the distance between the upper slabs 110, the degree to which the nut 20b is fastened (the degree to be moved upward on the drawing) is determined. (The closer the distance between the end of the stiffener and the upper slab, the greater the pressing force.)

On the other hand, as shown in FIG. 10, when a slight clearance is provided between the end of the reinforcement 10 and the upper slab 110, additional reinforcing force is applied by intimate contact with the upper slab 110 if necessary. There are advantages to being able to provide.

At this time, the second pressing step is performed together at both ends of the reinforcing material. Although the meaning of proceeding together does not mean that it proceeds exactly at the same time, it is preferable to apply force to the ends of the second rod 62 at the same time.

10 shows a state in which the end of the reinforcement 10 is in close contact with the upper slab 110 by performing the second pressing step described above.

In the case of the background art, a bracket fixed to the wall or a structure installed on the floor is used as a reaction force in order to apply force to the reinforcing material 10, but in the present invention, a force can be applied to the reinforcement 10 without a reaction force. By not separately installing the reaction arm, there is no damage to the base material due to the installation of the reaction arm, and the manpower, equipment, and materials required for the installation of the reaction arm can be reduced, and the working time can also be reduced, so a considerable economic effect can be expected.

The step of removing the pressing member is a step of removing the first pressing member 50 and the second pressing member 50 after the second pressing step is completed, as shown in FIG. 11. The drawing shows an anchor bolt (20c) and a nut (30c) not shown in FIG. 3, but when the fixing force is insufficient with the nuts (30a, 30b) fastened to the central anchor bolt (20a) and the end anchor bolt (20b) It is installed, and its installation location and number are determined by structural calculation during the design process.

In the above, by describing one preferred embodiment of the present invention, specific details for carrying out the present invention have been provided, but the technical idea of the present invention is not limited to the described embodiment, and the scope does not deviate from the technical idea of the present invention. It can be embodied as a method of reinforcing various types of box-type reinforced concrete structures within.

100: box-type reinforced concrete structure 10: reinforcement
20: anchor bolt 30: nut
40: ruler 50: first pressing member
60: second pressing member

Claims (9)

In the method for reinforcing the upper slab of a box-type reinforced concrete structure,
A reinforcing material manufacturing step of manufacturing a reinforcement material of a steel material in which the upper camber is formed when installed and the bolt hole is provided at the center and both ends thereof;
Anchor bolt installation step of installing anchor bolts at both ends and center portions of the upper slab of the box-type reinforced concrete structure;
A first coupling step of passing the anchor bolt through the bolt hole of the reinforcing material and then fastening the nut to the anchor bolt at the central portion to couple the reinforcing material to the upper slab;
A nut fastening step of fastening nuts to each of the anchor bolts passing through the bolt holes at both ends of the reinforcing material;
A first pressing member comprising a nut-shaped fastening member and a rod-shaped extension member fixed to the fastening member,
A pressing member providing step of providing a second pressing member in the form of a rod in which a mounting member capable of being supported by the extension member is provided in the center and a rotatable wheel is coupled at one end thereof;
After the nut fastening step, while the fastening member of the first pressing member is fastened to the anchor bolts passing through the bolt holes at both ends of the reinforcing member, the mounting member of the second pressing member is attached to the extension member of the first pressing member. It is mounted and supported, and a force is applied to the other end of the second pressing member in a downward direction while the wheel is in contact with the reinforcing member, so that the end of the reinforcing member is in close contact with the upper slab, and the nut fastened in the nut fastening step is moved upward. A second coupling step of moving and coupling the end of the reinforcing material to the upper slab; And,
A method for reinforcing a box-type reinforced concrete structure comprising a; pressing member removing step of removing the first pressing member and the second pressing member.
The method of claim 1,
The second bonding step is a method of reinforcing a box-type reinforced concrete structure, characterized in that proceeding together at both ends of the reinforcement.
The method of claim 1,
The reinforcement method for reinforcing a box-type reinforced concrete structure, characterized in that it comprises a vertical plate cut to form a camber and a horizontal plate in the form of a curved flat plate coupled to one side of the vertical plate.
The method of claim 3,
A method for reinforcing a box-type concrete structure, further comprising a curved flat plate-shaped horizontal plate coupled to the other side of the vertical plate.
The method of claim 3,
The horizontal plate has a relatively wide shape in the center, and a method for reinforcing a box-shaped concrete structure, further comprising a vertical plate perpendicular to the vertical plate.
The method according to claim 3 or 4,
The method of reinforcing a box-shaped concrete structure, characterized in that the vertical plate is provided with a pair.
The method according to claim 1 or 2,
Reinforcing method of a box-type reinforced concrete structure, characterized in that the reinforcing member adjusts the force acting of the upper slab by adjusting the degree to which the nut is moved upward while checking the distance between the upper slab and the nut in the second bonding step .
The method of claim 1,
A method for reinforcing a box-type reinforced concrete structure, wherein a length adjusting means is provided between the mounting member and the other end of the second pressing member.
The method of claim 3,
Reinforcement method of a box-type reinforced concrete structure, characterized in that the portion of the vertical plate coupled to the horizontal plate has a parabolic shape.

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