KR102352543B1 - Reinforcement device for approach slab and approach slab construction methods using thereof - Google Patents

Abstract

The present invention relates to a connection slab reinforcement body and a connection slab construction method using the same, and more particularly, to improve the durability of the connection slab and It relates to a connection slab reinforcement body capable of improving construction convenience, and a connection slab construction method using the same.

Description

Reinforcement device for approach slab and approach slab construction methods using thereof

The present invention relates to a connection slab reinforcement body and a connection slab construction method using the same, and more particularly, to improve the durability of the connection slab and It relates to a connection slab reinforcement body capable of improving construction convenience, and a connection slab construction method using the same.

In general, temporary bridges are constructed for the purpose of preventing obstruction of traffic to the existing lower road when constructing a new overpass, or securing a working space in the upper part of the river when constructing a bridge that crosses a river.

In the schematic construction process of such a temporary bridge, first, drive a pile that becomes a column, install a vent, install a mold girder in the vent, and install a duplex plate on the top of the installed mold girder. The first construction is completed. The constructed temporary bridge requires a process of pouring so that the connecting slab disposed on the upper part of the backfill is connected to it. The construction method of installing the connecting slab so that one end of the connecting slab is placed on the top of the cross-beam after installing the attached cross-beam, and the construction method of installing the connecting slab using a cross beam between the mold girder are used. .

Such a conventional construction method using a transverse beam has the advantage of being relatively easy to close the ends, but since a relatively large area of the ends of the mold girder must be cut, a weak part is generated due to the transmission force. In addition, the construction method using cross beams has the advantage of having fewer cut-out areas compared to the construction method using cross beams. and it is difficult to obtain an accurate cross section.

In addition, in the conventional connection slab construction methods, due to the complicated shape of the end of the temporary bridge and the lack of waterproofing treatment, rainwater flows in through the connection part of the temporary bridge and the connection slab, and the soil and soil in the backfill part is discharged. This can cause cracks between the reinforced earth retaining wall and the concrete structure and insufficient backfilling, which can cause a step difference between the temporary bridge and the connecting slab. Also, since the occurrence of a step difference in the connection part causes additional problems such as road noise, vehicle vibration, connection slab breakage, collision load, and traffic congestion due to maintenance, improvement is required.

Republic of Korea Patent Registration No. 10-1963815 (2019.03.25)

The present invention is to solve the problems of the prior art mentioned above, and an object of the present invention is to construct a connecting slab by using a reinforcing body for reinforcing the connecting slab by combining a plate with a cross-beam. As this is improved, it is possible to prevent the damage of the connecting slab even when the soil in the backfill is leaked, thereby preventing the occurrence of a step difference due to damage, and the connecting slab reinforcement body and the connecting slab construction using the same, which can improve the construction convenience to provide a way

Another object of the present invention is to form a cutout so that the upper surface of the lower flange of the transverse brace disposed in the cutout of the mold girder and the upper surface of the backfill are at the same height, thereby simplifying the end shape to reduce construction errors and facilitate closing To provide a connection slab reinforcement body capable of preventing soil leakage and minimizing the occurrence of weak parts due to cut-outs by minimizing the cut-out area of the mold girder, and a method for constructing a connection slab using the same.

Another object of the present invention is to provide a connecting slab reinforcing body capable of shortening on-site construction time by constructing using a pre-fabricated reinforcing body, and a connecting slab construction method using the same.

The connecting slab construction method according to an embodiment of the present invention is a connecting slab construction method for a temporary bridge, comprising the steps of (a) manufacturing a reinforcing body for reinforcing the connecting slab by combining a plate with a transverse beam, (b) a mold girder Cutting the end of the mold girder so that a cutout is formed in the part, (c) installing the reinforcement by placing and combining the transverse beams of the reinforcement in the cutout, and (d) connecting the installed reinforcement and the form using the formwork manufacturing the slab.

At this time, step (b) may cut off the end of the mold girder so that the upper surface of the lower flange and the upper surface of the backfill portion of the transverse brace disposed in the cutout form the same height.

In addition, step (a) includes the steps of coupling the bottom plate to the transverse brace so that one end of the bottom plate overlaps the upper surface of the lower flange of the transverse beam, and coupling the side plate to both sides of the bottom plate, and to the bottom plate It may include attaching one or more reinforcing bars.

In addition, a fitting groove is formed at one end of the side plate to which the upper flange of the transverse brace is fitted and coupled, and the distance from the lower end of the side plate to the fitting groove is the same as the distance from the lower flange of the cross beam to the upper flange, , the depth of the fitting groove may be formed to be the same as the protrusion length of one side of the upper flange.

In addition, the reinforcing reinforcing bar may include one or more main reinforcing bars whose length is formed to form a right angle with the web of the transverse beam, and one or more shear reinforcing bars supporting the main reinforcing bars from both sides so that the main reinforcing bars are spaced apart from the bottom plate.

In addition, in step (d), at least one first reinforcing bar having a length in the longitudinal direction of the main reinforcing bar and at least one second reinforcing bar having a length in the longitudinal direction and perpendicular to the length of the first reinforcing bar are reinforcing so that they are orthogonal to each other. It may include the steps of installing, connecting the first reinforcing bar to extend from the main reinforcing bar of the reinforcing bar, and pouring concrete into the installed reinforcing body and the formwork.

In addition, step (c) may install a reinforcement body by installing a brace plate in the cutout and placing a cross brace on the brace plate.

In addition, in step (b), the length of the base of the cross-section is the same as the width of the lower flange of the cross-beam, and the height of the cross-section is the length from the upper end of the mold girder to the upper end of the backfill. The end of the mold girder can be cut to form a cutout that is the sum of the lengths of the thicknesses of the girder.

On the other hand, the connecting slab reinforcing body according to this embodiment is a reinforcing body for reinforcing the connecting slab for a temporary bridge, and a transverse strut that is arranged and coupled in a transverse direction to the cutout of the mold girder, the upper surface of the lower flange of the transverse rib, and one end overlap It includes a bottom plate coupled so as to be possible, a side plate coupled to both sides of the bottom plate, and one or more reinforcing bars attached to the bottom plate.

At this time, the side plate is formed with a fitting groove in which the upper flange of the transverse brace is fitted and coupled at one end, and the distance from the lower end of the side plate to the fitting groove is the same as the distance from the lower flange of the transverse brace to the upper flange, and , the depth of the fitting groove may be formed to be the same as the protrusion length of one side of the upper flange.

In addition, the reinforcing reinforcing bar may include one or more main reinforcing bars whose length is formed to form a right angle with the web of the transverse beam, and one or more shear reinforcing bars supporting the main reinforcing bars from both sides so that the main reinforcing bars are spaced apart from the bottom plate.

According to the present invention, the durability of the connection slab is improved by constructing the connection slab using a reinforcement body that reinforces the connection slab by combining the plate with the cross-beam. Due to this, it is possible to prevent the occurrence of a step difference due to damage, and there is an effect that construction convenience can be improved.

In addition, the cut-out portion is formed so that the upper surface of the lower flange of the transverse brace disposed in the cut-out portion of the mold girder and the upper surface of the backfill are at the same height, thereby simplifying the shape of the end to reduce construction errors and facilitate closure to prevent soil runoff. And, by minimizing the cutout area of the mold girder, there is an effect that can minimize the occurrence of the weak part due to the cutout.

In addition, there is an effect that the construction period can be shortened by using a pre-fabricated reinforcing body.

1 is a diagram schematically illustrating a cross-section of a temporary bridge constructed through a method for constructing a connecting slab using a connecting slab reinforcement according to an embodiment of the present invention.
Figure 2 is a view for explaining the incisor of the mold girder according to an embodiment of the present invention.
3 is an exploded view schematically illustrating a reinforcing body according to an embodiment of the present invention.
4 is a view schematically illustrating a completed reinforcing body according to an embodiment of the present invention.
5 is a view for explaining the fitting groove of the side plate according to an embodiment of the present invention.
6 is a view showing a state of being connected between the main reinforcing bar and the first reinforcing bar according to an embodiment of the present invention.
7 is a flowchart illustrating a schematic connection slab construction sequence according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a view schematically showing a cross-section of a temporary bridge constructed through a method for constructing a connection slab (AS) using a connection slab reinforcement body 10 according to an embodiment of the present invention, and FIG. 2 is an example of the present invention. It is a view for explaining the cut-out portion 21 of the mold girder according to the embodiment, Figure 3 is a developed view schematically showing the reinforcing body 10 according to an embodiment of the present invention, Figure 4 is the present invention It is a view schematically showing the completed reinforcing body 10 according to an embodiment. And Figure 5 is a view for explaining the fitting groove 310 of the side plate according to an embodiment of the present invention.

The connecting slab (AS) construction method using the reinforcing body 10 according to this embodiment is a temporary bridge using the connecting slab (AS) reinforced using the reinforcing body 10 that combines the plate with the transverse beam 100. By constructing the connecting slab, the durability of the connecting slab (AS) can be improved.

When the connection slab (AS) construction method according to this embodiment will be described in more detail with reference to FIGS. 1 to 3, first, the bottom plate 200, the side plate on the transverse support 100, which is an H-beam steel arranged in the transverse direction. (300) and the reinforcing reinforcing bar (400) is combined to manufacture the reinforcing body (10). And the end of the mold girder 20 is cut off so that the cut-out part 21 is formed in the mold girder 20 of the temporary bridge, and the transverse beam 100 of the reinforcement body is placed in the cut-out part 21, and the reinforcement body ( 10) is installed. Then, concrete is poured using the installed reinforcing body 10 and the formwork to manufacture the connecting slab (AS). In this case, the reinforcing body 10 may form one end of the connecting slab AS and at the same time serve as a formwork of one end of the connecting slab AS. And, on the side of the connection slab (AS), other than the portion formed by the side plate 300 of the reinforcement body, after installing the formwork so that it extends from the side plate 300 of the reinforcement body 10, concrete is poured to the connection slab ( AS) can be prepared. In this case, the formwork installed to extend from the side plate 300 may be a form installed separately or a formwork installed in the process of constructing the backfill part BF disposed at the lower end of the connection slab AS.

Here, the primary construction process of the temporary bridge is to drive the pile, install the vent, install the mold girder in the vent, and then install the double deck plate (DP) on the top of the mold girder. Since the description of the process is a well-known technique, it will be omitted.

As shown in FIG. 1 in the method for constructing a connection slab (AS) for a temporary bridge according to this embodiment, when the pavement slab (PS) is poured on the upper part of the multi-deck plate (DP), a part of the pavement slab (PS) is cross-beam By arranging to cover the upper end of the, it is possible to reduce the inflow of rainwater through the gap between the connecting slab (AS) and the pavement slab (PS).

Referring to FIG. 2 , when the cut-out portion 21 is formed by cutting the end of the mold girder 20, the lower flange 110 of the transverse brace 100 of the reinforcing body disposed in the cut-out 21. The upper surface and The upper surface of the backfill part BF may be made to have the same height.

And when the transverse brace 100 of the reinforcing body is disposed and coupled to the cut-out part 21 of the mold girder, the brace plate 30 in the cut-out part 21 for strengthening the bonding force of the mold girder 20 and the transverse beam 100 ) can be installed and the reinforcing body 10 can be installed by placing and combining the transverse brace 100 on the brace plate 30 . Here, the area of the brace plate 30 may be formed to be the same as the area of the lower flange 110 of the cross brace 100 .

At this time, in the cutout 21, the length l1 of the bottom side of the cross section is the same as the width length l1 of the lower flange of the transverse beam, and the height l2 of the cross section is the length from the upper end of the mold girder to the upper end of the backfill ( l3) and the thickness of the lower flange (l4) of the transverse brace and the length of the thickness (l5) of the brace plate may be formed in a combined length.

That is, assuming that the cutout 21 is a virtual rectangular parallelepiped, the height of the cutout 21 is the difference between the height of the mold girder and the backfill (l3) the lower flange thickness (l4) and the thickness (l5) of the support plate. It becomes the summed length l2 , and the area of the bottom surface of the cut-out portion 21 becomes the same value as the area of the bottom surface of the lower flange 110 . Therefore, in the connection slab (AS) construction method according to this embodiment, the end of the mold girder is cut by the height of the height difference (l3) of the mold girder and the backfill part plus the height length of the transverse beam. Connection using a conventional transverse brace Compared to the slab construction method, the cut-out area of the mold girder can be significantly reduced. Therefore, the method for constructing a connection slab (AS) for a temporary bridge according to the present embodiment has an effect of minimizing the occurrence of a weak part due to the cut-out part 21 by minimizing the cut-out area of the mold girder 20 .

And at this time, the stiffener 22 in a direction extending from the web 130 of the transverse brace may be arranged to reinforce the mold girder 20 .

The connection slab reinforcing body 10 according to the present embodiment may include the transverse brace 100 , the bottom plate 200 , the side plate 300 and the reinforcing bar 400 as described above.

3 to 5, the connecting slab reinforcement body 10 according to the present embodiment is a transverse brace 100 and a transverse brace disposed in the transverse direction in the cutout 21 of the mold girder. A bottom plate 200 coupled to the upper surface of the lower flange 110 of the one end overlapping, a side plate 300 coupled to both sides of the bottom plate 200, and one attached to the bottom plate 200 It includes the reinforcing reinforcing bar 400 above.

At this time, the side plate 300 has a fitting groove 310 in which the upper flange 120 of the transverse brace is fitted and coupled to one end is formed, and the distance from the lower end of the side plate to the fitting groove (17) is that of the transverse brace. It may be formed equal to the distance 17 from the lower flange to the upper flange. At this time, the thickness l8 of the fitting groove may be formed to have the same thickness as the thickness l8 of the upper flange, and the depth l9 of the fitting groove may be formed equal to the length l10 of one side of the upper flange. That is, in a state in which the side plate 300 is fitted and coupled to the transverse brace 100, the upper portion of the fitting groove 310 of the side plate protrudes toward the upper side of the transverse brace 100, and the fitting groove 310 of the side plate. The lower part is fitted and coupled to the space between the upper flange 120 and the lower flange 110 of the transverse brace.

And the reinforcing reinforcing bar 400 of the reinforcing body 10 is one or more main reinforcing bars 410 and the main reinforcing bars 410, the length of which is formed to form a right angle with the web 130 of the transverse beam, and the main reinforcing bars 410 are spaced apart from the bottom plate 200. It may include one or more shear reinforcement 420 supporting the 410 from both sides. At this time, the plurality of shear reinforcing bars 420 support both sides of the main reinforcing bars 410 in pairs in order to stably support the main reinforcing bars 410, and the paired shear reinforcing bars 420 are vertically inverted 'V' together. They may be batch-coupled to form a ruler shape.

For this reason, the reinforcing body 10 according to the present embodiment improves the durability of the connecting slab AS to prevent damage to the connecting slab AS even when soil flows out of the backfill portion, thereby generating a step difference due to breakage can prevent

6 is a view showing a state of being connected between the main reinforcing bar and the first reinforcing bar according to an embodiment of the present invention.

Referring to FIG. 6 , when the connection slab AS is manufactured using the above-described installed reinforcing body 10 and formwork M, the length along the longitudinal direction of the main reinforcing bar 410 on the upper side of the backfill portion BF is The at least one first reinforcing bar 41 and at least one second reinforcing bar 42 having a length in the longitudinal direction and vertical direction of the first reinforcing bar 41 may be reinforced and installed so as to be orthogonal to each other. And by connecting the installed first rebar 41 to extend from the main reinforcing bar 410 of the reinforcing reinforcing bar, the reinforcing reinforcing bar 400, the first reinforcing bar 41, and the second reinforcing bar constitute the skeleton of the connection slab (AS). And, the connection slab (AS) can be manufactured by pouring concrete into the installed reinforcing body (10) and the form (M).

7 is a flowchart illustrating a schematic connection slab (AS) construction sequence according to an embodiment of the present invention.

Referring again to the connection slab (AS) construction sequence according to this embodiment with reference to FIG. 7 , first, the bottom plate 200, the side plate 300 and the reinforcing reinforcing bar 400 are combined with the transverse brace 100 to A reinforcing body 10 for reinforcing the connection slab is manufactured (S110). And the end of the mold girder 20 is cut off so that the cut-out portion 21 is formed in the mold girder 20 according to the above-mentioned standard (S120).

When the cut-out portion 21 is formed, the reinforcing body 10 is installed by placing and combining the transverse brace 100 of the reinforcing body in the formed cut-out 21 (S130), and the installed reinforcing body 10 and the formwork (M) ) to manufacture the connection slab (AS) by using the connection slab (AS) construction is completed (S140).

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed 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.

10: reinforcement
20: mold girder 21: cutout
22: stiffener 30: brace plate
41: first reinforcing bar 42: second reinforcing bar
100: transverse beam 110: lower flange
120: upper flange 130: web
200: bottom plate 300: side plate
310: fitting groove 400: reinforcing bar
410: main reinforcing bar 420: shear reinforcing bar
AS: Connection slab BF: Backfill
DP: Cover plate M: Formwork
PS: paving slab

Claims (11)

In the method for constructing a connection slab for a temporary bridge,
(a) manufacturing a reinforcing body for reinforcing the connection slab by combining a plate with a transverse beam;
(b) cutting the end of the mold girder so that a cutout is formed in the mold girder;
(c) installing the reinforcing body by arranging and combining the transverse beams of the reinforcing body in the cut-out portion; and
(d) manufacturing the connection slab using the installed reinforcing body and formwork,
Step (a) is
coupling the bottom plate to the transverse brace so that one end of the bottom plate overlaps the upper surface of the lower flange of the transverse brace;
coupling a side plate to both sides of the bottom plate; and
Connection slab construction method comprising the step of attaching one or more reinforcing bars to the bottom plate.
The method of claim 1,
The step (b) is a connection slab construction method, characterized in that by cutting the end of the mold girder so that the upper surface of the lower flange and the upper surface of the backfill portion of the transverse brace disposed in the cut-out portion are at the same height.
delete 3. The method of claim 2,
At one end of the side plate, a fitting groove is formed in which the upper flange of the transverse brace is fitted and coupled,
The distance from the lower end of the side plate to the fitting groove is formed to be the same as the distance from the lower flange to the upper flange of the transverse brace, and the depth of the fitting groove is formed to be the same as the protruding length of one side of the upper flange Connection slab construction method using
3. The method of claim 2,
The reinforcing reinforcing bar includes at least one main reinforcing bar, the length of which is formed at right angles to the web of the cross brace, and at least one shear reinforcing bar supporting the main reinforcing bars from both sides so that the main reinforcing bars are spaced apart from the bottom plate. Slab construction method.
The method of claim 5, wherein step (d) is
Reinforcing and installing one or more first reinforcing bars having a length in the longitudinal direction of the main reinforcing bars and one or more second reinforcing bars having a length in a longitudinal direction of the first reinforcing bars perpendicular to each other;
connecting the first reinforcing bar to extend from the main reinforcing bar of the reinforcing bar; and
Connection slab construction method comprising the step of pouring concrete to the installed reinforcing body and formwork.
delete In the method for constructing a connection slab for a temporary bridge,
(a) manufacturing a reinforcing body for reinforcing the connection slab by combining a plate with a transverse beam;
(b) cutting the end of the mold girder so that a cutout is formed in the mold girder;
(c) installing the reinforcing body by arranging and combining the transverse beams of the reinforcing body in the cut-out portion; and
(d) manufacturing the connection slab using the installed reinforcing body and formwork,
The step (c) installs a brace plate in the cut-out portion, and installs the reinforcement body by placing and coupling the transverse brace to the brace plate,
In step (b), the length of the base of the cross-section is the same as the width of the lower flange of the cross-beam, and the height of the cross-section is the length from the upper end of the mold girder to the upper end of the backfill. The thickness of the lower flange of the cross-beam and Connection slab construction method, characterized in that by cutting off the end of the mold girder to form the cut-out that is the sum of the thickness and length of the support plate.
A reinforcing body for reinforcing connection slabs for temporary bridges,
Transverse beams arranged and coupled in the transverse direction to the cutouts of the mold girder;
A bottom plate coupled to the upper surface of the lower flange of the transverse brace, one end overlapping;
side plates coupled to both sides of the bottom plate;
Connection slab reinforcement body, characterized in that it comprises one or more reinforcement reinforcement attached to the bottom plate.
10. The method of claim 9,
The side plate is formed with a fitting groove at one end of which the upper flange of the transverse brace is fitted and coupled,
The distance from the lower end of the side plate to the fitting groove is formed to be the same as the distance from the lower flange to the upper flange of the transverse brace, and the depth of the fitting groove is formed to be the same as the protruding length of one side of the upper flange Connection slab reinforcement body with
11. The method of claim 10,
The reinforcing reinforcing bar includes at least one main reinforcing bar, the length of which is formed at right angles to the web of the cross brace, and at least one shear reinforcing bar supporting the main reinforcing bars from both sides so that the main reinforcing bars are spaced apart from the bottom plate. slab reinforcement.

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