KR102633906B1 - Temporary bridge and construction method using the same - Google Patents

Abstract

Temporary bridge construction begins. A temporary bridge according to one aspect of the present invention is a temporary bridge that is temporarily installed and then dismantled, and includes a first girder extending in the longitudinal direction of the temporary bridge, and a second girder spaced apart from the first girder in the width direction of the temporary bridge. A first girder section including two girders; a second girder portion disposed at one end of the first girder and the second girder in the longitudinal direction and including a third girder and a fourth girder spaced apart in the width direction; an upper connection part disposed simultaneously on the upper flange of the first girder part and the second girder part to connect the first girder part and the second girder part to each other, and protruding from the upper flange by a first step; and a first cover plate disposed to cover the upper portions of the first girder portion and the second girder portion, and a portion of the cover plate is supported by being disposed on the upper connection portion, wherein the first cover plate has a center having a first height. part time job; and a support portion disposed on both sides of the central portion, contacting the upper connection portion, and having a second height smaller than the first height to accommodate the first step.

Description

Temporary bridge and construction method using the same {Temporary bridge and construction method using the same}

The present invention relates to a temporary bridge and a construction method using the same, and more specifically, to a temporary bridge that is temporarily installed and then dismantled.

Recently, the demand for temporary bridges for vehicle bypass has been increasing due to bridge re-construction or individual construction due to the aging of existing bridges.

The upper structure of this temporary bridge mainly uses H-beam steel as a pair of mold girders and a structure in which a cover plate is installed on the upper part of the pair of mold girders.

At this time, when constructing H-beams used as mold girders by connecting them in the longitudinal direction, splices are inevitably created between adjacent mold girders to connect them.

In relation to this, in consideration of constructability and stability when connecting the mold girder, a connection method using bolts and splice plates is mainly applied, as shown in FIG. 1. These bolts and joint leaflets are formed to protrude from the mold girder at a predetermined height as shown in the drawing.

However, in the case of temporary bridges, since the cover plate is installed on the upper flange of the mold girder, there is a problem in that it is difficult to install the cover plate if there is a step or structure at the top of the mold girder.

To solve this problem, in the case of the prior art, the web and lower flange of the cast girder use the bolts and splice plates described above, but the upper part mainly uses the butt welding method to minimize the protruding part. .

However, in the case of butt welding like this, the cross section of the connection part of the mold girder may gradually decrease due to repeated formation and disassembly of the welded part when reinstalling or reusing the temporary bridge after dismantling.

In this case, although the connecting part of the mold girder acts as a weak part because a lot of stress is generated when a moment occurs, there is a problem that stress loss occurs due to the reduction in cross section due to the above-described butt welding, making it more mechanically vulnerable.

In addition, although the mold girder has a thick flange and the difficulty of connecting by butt welding is very high, there is a problem in that it is difficult to re-weld due to the above-mentioned reduction in cross-section, which creates a construction obstacle.

The present invention is intended to solve the above problems, and the purpose of the present invention is to provide a temporary bridge that does not require butt welding of the connecting portion of the mold girder and a construction method using the same.

Another object of the present invention is to provide a temporary bridge that can improve constructability and safety without requiring butt welding, and a construction method using the same.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below.

According to one aspect of the present invention, a temporary bridge that is temporarily installed and then dismantled includes a first girder extending in the longitudinal direction of the temporary bridge, and a second girder spaced apart from the first girder in the width direction of the temporary bridge. A first girder portion including; a second girder portion disposed at one end of the first girder and the second girder in the longitudinal direction and including a third girder and a fourth girder spaced apart in the width direction; an upper connection part disposed simultaneously on the upper flange of the first girder part and the second girder part to connect the first girder part and the second girder part to each other, and protruding from the upper flange by a first step; and a first cover plate disposed to cover the upper portions of the first girder portion and the second girder portion, and a portion of the cover plate is supported by being disposed on the upper connection portion, wherein the first cover plate has a center having a first height. part time job; and a support portion disposed on both sides of the central portion, contacting the upper connection portion, and having a second height smaller than the first height to accommodate the first step.

At this time, it further includes a second covering plate disposed adjacent to the first covering plate and formed to have the same overall height without the support portion, and the first covering plate and the second covering plate may form the same plane.

At this time, the upper connection part is formed in the shape of a plate, disposed simultaneously on the upper flange surface of the first girder part and the second girder part, and a joint member through which a plurality of through holes are formed; a plurality of bolt members simultaneously penetrating the joint member and the upper flange along the through hole; a plurality of nut members fastened to the bolt member; And it may include a flattening member for flattening the protruding portion caused by the head portion of the bolt member.

At this time, the upper connection part is disposed on the joint member and further includes a washer through which the bolt member penetrates, and the flattening member is disposed on the upper portion of the joint member and is formed in the shape of a plate and surrounds the washer on the inside. A washer receiving plate in which a receiving hole is formed; a bolt accommodating plate disposed on an upper part of the washer accommodating plate and formed in the shape of a plate, with a rectangular through hole formed on the inner side corresponding to the shape of the head of the bolt member; and an elastic plate formed of a material having elastic force, disposed on an upper part of the bolt receiving plate and in contact with the support portion.

At this time, the first height may be equal to the sum of the second height and the first step.

At this time, the first covering plate further includes a reinforcing part that protrudes from a part of the supporting part by the first step to be in contact with the upper flange, and the reinforcing part is manufactured separately from the supporting part and then supported. Can be combined into parts.

At this time, the support part may be provided with a support surface at the bottom to face the upper connection part, and a space may be formed between the support surface and the upper flange.

At this time, the temporary bridge can be used as the whole or part of the covering structure at a subway site, underground structure site, or sewer pipe site.

According to another aspect of the present invention, there is a temporary bridge construction method using the above-described temporary bridge, comprising the steps of placing the first girder part and the second girder part on site; Connecting the first girder portion and the second girder portion through the upper connection portion; disposing the first cover plate on the upper connection portion; and arranging a second covering plate at a position adjacent to the first covering plate to form the same plane as the first covering plate. A temporary bridge construction method including a step is provided.

According to the above configuration, the temporary bridge according to the embodiment of the present invention uses joint leaflets and bolts at the connection part of the girder by arranging the first cover plate having a support part with a lower height compared to the central part on both sides of the central part. This ensures a strong fixing force and can effectively accommodate the protruding part caused by the upper connection part.

In addition, the temporary bridge according to an embodiment of the present invention can form an upper connection through bolting rather than welding, so the cross section of the mold girder can be effectively preserved despite repeated installation and dismantling of the temporary bridge.

In addition, the temporary bridge according to the embodiment of the present invention can be constructed by selectively arranging the first cladding plate only for the connecting portion of the girder and placing the existing cladding plate for the other portions, thereby ensuring compatibility with existing construction equipment. can do.

The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

Figure 1 is a diagram showing the connection portion of a temporary bridge according to the prior art.
Figure 2 is a perspective view showing a temporary bridge according to an embodiment of the present invention.
Figure 3 is an enlarged perspective view of portion “A” of Figure 2.
Figure 4 is an enlarged perspective view showing the “B” part of Figure 2.
Figure 5 is an exploded perspective view showing a temporary bridge according to an embodiment of the present invention.
Figures 6 and 7 are perspective views showing a portion of the first cover plate of a temporary bridge according to an embodiment of the present invention.
Figure 8 is a perspective view showing a connection part of a temporary bridge according to an embodiment of the present invention.
Figure 9 is a cross-sectional view showing a cross-section of a connection part of a temporary bridge according to an embodiment of the present invention.
10 and 11 are cross-sectional views showing a cross-section of a temporary bridge according to an embodiment of the present invention.
Figure 12 is a side view showing a temporary bridge according to an embodiment of the present invention.
Figure 13 is a plan view showing a temporary bridge according to an embodiment of the present invention.
Figure 14 is a flowchart showing each step of the temporary bridge construction method according to an embodiment of the present invention.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention, parts not related to the description have been omitted in the drawings, and identical or similar components are given the same reference numerals throughout the specification.

The words and terms used in this specification and claims are not to be construed as limited in their usual or dictionary meanings, but according to the principle that the inventor can define terms and concepts in order to explain his or her invention in the best way. It must be interpreted with meaning and concepts consistent with technical ideas.

Figure 1 is a diagram showing the connection portion of a temporary bridge according to the prior art. Figure 2 is a perspective view showing a temporary bridge according to an embodiment of the present invention. Figure 3 is an enlarged perspective view of portion “A” of Figure 2. Figure 4 is an enlarged perspective view showing the “B” part of Figure 2. Figure 5 is an exploded perspective view showing a temporary bridge according to an embodiment of the present invention. Figures 6 and 7 are perspective views showing a portion of the first cover plate of a temporary bridge according to an embodiment of the present invention. Figure 8 is a perspective view showing a connection part of a temporary bridge according to an embodiment of the present invention. Figure 9 is a cross-sectional view showing a cross-section of a connection part of a temporary bridge according to an embodiment of the present invention. 10 and 11 are cross-sectional views showing a cross-section of a temporary bridge according to an embodiment of the present invention. Figure 12 is a side view showing a temporary bridge according to an embodiment of the present invention. Figure 13 is a plan view showing a temporary bridge according to an embodiment of the present invention.

The temporary bridge 100 according to an embodiment of the present invention is a temporary structure including a covering plate to temporarily cover an area of a construction site. For example, a temporary bridge is used to provide a detour during re-construction or individual construction of a main bridge. It may be a temporary bridge that is installed and then dismantled.

However, the application of the temporary bridge 100 according to an embodiment of the present invention is not limited to temporary bridges according to the name of the invention, and is used to cover the upper part of the site through a cover plate during construction of subways, underground structures, sewer pipes, etc. It may also be used as a covered structure, and in this case, it should be noted that the temporary bridge mentioned in this specification refers to the covered structure.

At this time, the temporary bridge 100 according to an embodiment of the present invention connects the upper flanges 16 of adjacent mold girders through the upper connection part 30 including bolts and splice plates ( bonding), and by providing the first cover plate 60 including the support portion 62, it is possible to accommodate the step h3 due to the protrusion of the upper connection portion 30. Hereinafter, we will take a closer look at each configuration and effect of the temporary bridge 100 according to an embodiment of the present invention, focusing on this.

Referring to Figures 2 and 5, the temporary bridge 100 according to an embodiment of the present invention includes a first girder part 10, a second girder part 20, connection parts 30, 40, 50, and a first girder part 10. It may include a cover plate 60.

First, the first girder portion 10 includes a first girder 11 extending in the longitudinal direction of the temporary bridge 100 and a second girder spaced apart from the first girder 11 in the width direction of the temporary bridge 100. Includes (12).

At this time, the first girder 11 and the second girder 12 are beam-shaped structures as shown in the drawing, and the dead load and cover plates 60 and 70, which will be described later, are applied. It can function as a mold girder that stably transmits loads, including the live load of the upper part, to the foundation structure (not shown). Here, the first girder 11 and the second girder 12 may have the same structure and shape, and to avoid duplicate description, unless otherwise specified, the description of the first girder 11 will be used to describe the second girder. The explanation for (12) will be replaced.

In one embodiment of the present invention, the first girder 11 is made of a steel material and may have bending rigidity and torsional rigidity capable of sufficiently withstanding the load from the upper portion.

As an example, the first girder 11 may be formed of an I-beam or H-beam including an upper flange 16, a lower flange 18, and a belly 17. However, the type of the first girder 11 is not limited to this, and various types of known steel materials can be applied. In this case, the part in contact with the cover plates 60 and 70 among various types of steel may be referred to as the upper flange 16 regardless of shape.

In one embodiment of the present invention, a plurality of connection holes (not shown) are formed in the upper flange 16 of the first girder 11, so that the bolt member 34 of the upper connection portion 30, which will be described later, penetrates the nut. It can be fastened to the member 35. This will be described in more detail through the description of the upper connection portion 30.

Referring again to FIGS. 2 and 5, the temporary bridge 100 according to an embodiment of the present invention includes a second girder portion 20 connected to the first girder portion 10.

At this time, the second girder portion 20 may include a third girder 21 and a fourth girder 22 that are arranged to be spaced apart from each other in the width direction, similar to the first girder portion 10.

At this time, the third girder 21 and the fourth girder 22 may be disposed on the longitudinal end sides of the first girder 11 and the second girder 12, respectively, as shown in FIG. 5. And, the third girder 21 and the fourth girder 22 may be connected to the first girder 11 and the second girder 12, respectively, by connection parts 30, 40, and 50, which will be described later. In this way, the first girder part 10 and the second girder part 20 are connected to each other, so that the external force applied to the plurality of girders 11, 12, 21, and 22 constituting them can be shared with each other.

In one embodiment of the present invention, the third girder 21 and the fourth girder 22, like the second girder 12, may be formed of the same member as the above-described first girder 11. Therefore, individual descriptions of the third girder 21 and fourth girder 22 will be replaced with descriptions of the first girder 11.

The temporary bridge 100 according to an embodiment of the present invention includes connection parts 30, 40, and 50 for connecting the first girder part 10 and the second girder part 20.

At this time, the connection parts 30, 40, and 50 can be largely divided into an upper connection part 30, an abdominal connection part 50, and a lower connection part 40, depending on the position in the girder.

In one embodiment of the present invention, the upper connection portion 30 includes the support portion 62, the first girder portion 10, and the second girder portion 20 of the first covering plate 60, which will be described later, as shown in FIG. 5. ) can be placed between the upper flanges 16 to connect the upper portions of the first girder portion 10 and the second girder portion 20.

At this time, the upper connection part 30 may include a joint member 31, a bolt member 34, a nut member 35, and a flattening member 38.

In one embodiment of the present invention, the joint member 31 is a member formed in the shape of a plate as shown in FIG. 8, and is located on the upper flange 16 of the first girder portion 10 and the second girder portion 20. Can be placed simultaneously (sequentially). Additionally, the joint member 31 may be formed with a plurality of through holes through which the bolt member 34 can pass. That is, the joint member 31 may be a known splice plate that connects a plurality of girders through bolt connection.

Also, the bolt member 34 and the nut member 35 may be known bolts and nuts used when connecting a girder using a joint leaflet.

That is, the bolt member 34 sequentially penetrates through the through hole of the joint member 31 and the connection hole of the upper flange 16, and then forms a bolt-nut combination with the nut member 35 on the opposite side, thereby forming the joint member. (31) can be pressurized. As a result, the joint member 31 can be fixed on the upper flange 16, through the joint member 31 arranged to connect the first girder portion 10 and the second girder portion 20. Thus, the first girder part 10 and the second girder part 20 can be connected without being separated from each other.

In one embodiment of the present invention, a flattening member 38 may be disposed on the joint member 31.

At this time, the flattening member 38 may be disposed to provide a large contact area by flattening the protruding portion of the bolt member 34 protruding toward the top of the joint member 31.

More specifically, referring to FIG. 9, the first cover plate 60 must be placed and contacted on the upper part of the joint member 31. In this case, the head portion of the bolt member 34 described above locally protrudes. As a result, a sufficient contact area with the first covering plate 60 cannot be secured, which may result in structural weakness. To solve this problem, a flattening member 38 may be disposed on the upper part of the joint member 31 to flatten the upper part of the upper connection part 30.

In one embodiment of the present invention, the flattening member 38 may include a washer receiving plate 37, a bolt receiving plate 32, and an elastic plate 33.

First, the washer receiving plate 37 covers the thickness of the washer 36 when the bolt member 34 is fastened after the washer 36 is placed on the joint member 31 of the upper connection portion 30. It may be a plate for.

To this end, the washer receiving plate 37 may have a plurality of receiving holes 37a formed on the inside, as shown in FIG. 8, having a diameter corresponding to the diameter of the washer 36. At this time, the thickness of the washer receiving plate 37 may be the same as the thickness of the washer, or may be formed up to 2 mm thicker considering tolerances.

However, unlike this, the washer receiving plate 37 may be formed to have a thickness that is the sum of the head thicknesses of the washer 36 and the bolt member 34, as shown in FIG. 9(b).

In this case, the washer receiving plate 37 may be inserted into the washer 36 as well as the head of the bolt member 34 inside the receiving hole 37a, and thus the bolt receiving plate 32, which will be described later, is omitted. This can reduce processes and costs. In other words, the washer receiving plate 37 can simultaneously perform the function of the bolt receiving plate 32, and the washer receiving plate 37 has a large contact area excluding the receiving hole 37a at the top of the upper connection portion 30. The above-described flattening function can be performed by providing .

Next, the bolt receiving plate 32 may be a plate material to cover the head thickness of the bolt member 34 by forming a rectangular through hole 32a on the inside, similar to the washer receiving plate 37.

At this time, the rectangular through hole 32a is formed in a shape corresponding to the head shape of the bolt member 34, for example, a hexagonal shape, as shown in the drawing, and can stably surround the outside of the head of the bolt member 34. As a result, the bolt receiving plate 32 can secure a fixing force so that it does not come off from the upper connection portion 30. However, as described above, when the washer receiving plate 37 is thick enough to cover the thickness of the head of the bolt member 34, the arrangement of the bolt receiving plate 32 may be omitted.

Referring again to FIG. 8, the elastic plate 33 is a plate disposed at the top of the upper connection portion 30, and, unlike the washer receiving plate 37 and the bolt receiving plate 32 described above, is formed of a material having elastic force. You can. Accordingly, the elastic plate 33 is compressed by the load of the first covering plate 60 when the first covering plate 60 is in close contact with the first covering plate 60 to maximize the contact area with the first covering plate 60. ) can secure sufficient traction.

In addition, unlike the washer receiving plate 37 and the bolt receiving plate 32, the elastic plate 33 is formed as a completely flat structure with no holes formed on the inside, thereby providing a wider contact area to maximize the flattening function. there is.

In one embodiment of the present invention, the flattening member 38 is a three-stage stack including all of the washer receiving plate 37, the bolt receiving plate 32, and the elastic plate 33, as shown in FIG. 9(a). structure can be achieved. However, it should be noted that, as shown in FIG. 9(b), any part of the washer receiving plate 37, bolt receiving plate 32, and elastic plate 33 may be omitted. In addition, the flattening member 38 can be any member other than the configuration described above, as long as it is a member that can provide a wider contact area by eliminating the step formed at the top of the upper connection portion 30.

Meanwhile, the temporary bridge 100 according to an embodiment of the present invention includes a first covering plate 60 disposed to cover the upper area of the first girder portion 10 and the second girder portion 20.

At this time, referring to FIGS. 6 and 7, the first cover plate 60 can be largely divided into a central portion 61 and a support portion 62 disposed on both sides of the central portion 61.

The central portion 61 is a portion having a thick first height h1 compared to the second height h2 of the support portion 62 and is an open area between the first girder 11 and the second girder 12. It may be a part placed on the table. At this time, the first height (h1) may be the thickness of a cover plate commonly used at construction sites, and may be 200 mm, for example.

At this time, the central portion 61 may be coupled to one side of the crossbeam 90 for synthesis with the crossbeam 90 disposed between the first girder 11 and the second girder 12, if necessary.

In one embodiment of the present invention, the support portion 62 is a portion disposed on the above-described upper connection portion 30 and supported by the upper connection portion 30. To this end, the support portion 62 has a second height (h2) smaller than the first height (h1) to accommodate the first step (h3) caused by the upper connection portion 30, as shown in FIG. 11. can be formed.

In more detail, the support portion 62 may be formed by cutting portions of lower portions of both sides of the first cover plate 60 upward, as shown in FIGS. 6 and 7 . Through this, even if the upper connection part 30 is disposed at the connection part of the girder and protrudes upward by the first step h3, the support part 62 can accommodate it.

As a result, as shown in FIG. 5, even if the second covering plate 70 of a general form having the same height as a whole without the support portion 62 is disposed at a position other than the connection part of the girder, the first covering plate 60 and the second covering plate 60 The two cover plates 70 may form the same plane.

Meanwhile, referring to FIG. 4, a support surface 64 may be provided at the lower part of the support portion 62 to be in contact with the upper connection portion 30, for example, the elastic plate 33. At this time, not all of the support surfaces 64 are in contact with the upper connection part 30, and for portions where the upper connection part 30 is not arranged, the support surface 64 and the upper flange 16 as shown in FIG. A space having a height corresponding to the first step h3 may be formed therebetween.

In one embodiment of the present invention, as shown in Figure 12, the first height h1 of the central portion 61 is divided by the second height h2 of the support portion 62 and the first height h1 by the upper connection portion 30. It may be the sum of the step difference (h3). Through this, when the second cover plate 70 of a general form having an overall first height h1 is placed in an adjacent position, the upper or lower surface of the first cover plate 60 has no protruding portion compared to the second cover plate 70. The same plane can be formed.

However, this is only an example, and the first height h1 may be greater than the sum of the second height h2 and the first step h3. In this case, direct contact with the crossbeam 90 disposed below the first covering plate 60 is possible, so that synthesis with the crossbeam 90 can be facilitated.

In one embodiment of the present invention, the first cover plate 60 may include a reinforcing portion 63 that protrudes from a portion of the support portion 62 to face the upper flange 16.

Specifically, the reinforcing part 63 is a member that fills part of the space formed between the support part 62 and the upper flange 16 as shown in FIG. 3, and connects the support part 62 and the upper flange 16. can be connected to each other. If there is no such reinforcement portion 63, the load transmitted from the first cover plate 60 may be concentrated on the upper connection portion 30, which is the only connection portion with the girder. However, the temporary bridge 100 according to an embodiment of the present invention partially contacts the upper flange 16 on one side of the support portion 62 and forms the reinforcing portion 63 to share the load, as described above. Problems caused by concentrated load can be solved.

At this time, the reinforcement part 63 is manufactured separately from the support part 62 as shown in FIGS. 6 and 7, and then the bolt 65 - nut 66 is coupled to the support surface 64 of the support part 62. It can be formed so that it can be fastened through. To this end, a plurality of through holes may be formed in the support surface 64 through which the bolt 65 can pass.

In this way, the reinforcement part 63 is formed to be separable from the support part 62, so that the designer can place the reinforcement part 63 in the right place among various positions by considering various design requirements, and reinforce it as necessary. The number of arrangements of parts 63 can be adjusted.

For example, when a temporary bridge is formed cross-linked and has an overall skew angle as shown in Figure 13(b), the position of the upper connection portion 30 on the left and right sides of the girder may be asymmetric. In this case, the reinforcement portion 63 ) can also be placed asymmetrically.

Meanwhile, unlike shown, the reinforcement part 63 may be formed in an integrated form (so that it cannot be separated) with the center part 61 and the support part 62. In this case, the separate reinforcement part fastening work can be omitted, thereby minimizing the process.

Figure 14 is a flowchart showing each step of the temporary bridge construction method according to an embodiment of the present invention. Hereinafter, a temporary bridge construction method according to an embodiment of the present invention will be described with reference to the drawings.

The temporary bridge construction method according to an embodiment of the present invention can be constructed using the first covering plate 60 with support portions 62 formed on both sides as described above.

First, the temporary bridge construction method according to an embodiment of the present invention may include the step of arranging the first girder part 10 and the second girder part 20 on site. (S11) That is, the third girder 21 of the second girder part 20 is placed in contact with one end of the first girder 11 of the first girder part 10, and the second girder 12 The fourth girder 22 can be placed in contact with one end of the .

Next, each end of the first girder part 10 and the second girder part 20 can be connected to each other through the connection parts 30, 40, and 50. (S12) At this time, in the case of the upper connection part 30, the joint member 31 is placed on the upper flange 16, and the bolt member 34 is passed through both the joint member 31 and the upper flange 16. After placement, the nut member 35 can be fastened.

Next, a flattening member 38 may be placed to cover the local protrusion caused by the head of the bolt member 34. That is, all or part of the washer receiving plate 37, bolt receiving plate 32, and elastic plate 33 may be arranged sequentially.

In addition, the temporary bridge construction method according to an embodiment of the present invention may include the step of disposing the first covering plate 60 on the upper connection portion 30. (S13) In this case, the first cover plate 60 can accommodate the step of the upper connection portion 30 by including support portions 62 on both sides of the center portion 61 as described above.

Lastly, the temporary bridge construction method according to an embodiment of the present invention may include the step of arranging the second covering plate 70 at a position adjacent to the first covering plate 60. (S14) At this time, the step of the upper connection part 30 is covered by the first cover plate 60, so that the first cover plate 60 does not protrude compared to the second cover plate 70 and can form the same plane.

As seen, the temporary bridge 100 according to an embodiment of the present invention provides a strong fixing force using joint leaflets and bolts at the connection portion of the girder by arranging the first cover plate having support portions 62 on both sides. It is possible to effectively cover the protruding portion caused by the upper connection portion 30 while securing the surface. Through this, the temporary bridge 100 according to an embodiment of the present invention can compensate for the weak fixing force caused by the existing girder connection by upper welding.

In addition, since the temporary bridge according to an embodiment of the present invention can form the upper connection portion 30 through bolting rather than welding, the cross section of the mold girder can be effectively preserved despite repeated installation and dismantling of the temporary bridge. You can.

In addition, the temporary bridge according to an embodiment of the present invention can be constructed by selectively arranging the first cladding plate 60 only for the connecting portion of the girder, and placing the existing cladding plate (second cladding plate) for the other parts. Therefore, compatibility with existing construction equipment can be secured.

Although an embodiment of the present invention has been described above, the spirit of the present invention is not limited by the embodiments presented in the present specification, and those skilled in the art who understand the spirit of the present invention will understand the spirit of the present invention, within the scope of the same spirit. Other embodiments can be easily proposed by addition, change, deletion, addition, etc., but this will also be said to fall within the scope of the present invention.

10: first girder part 20: second girder part
30: upper connection part 31: joint member
32: bolt receiving plate 33: elastic plate
37: washer receiving plate 60: first cover plate
61: center part 62: support part
63: reinforcement part 64: support surface
70: Second repair plate

Claims (9)

A temporary bridge that is temporarily installed and then dismantled.
A first girder portion including a first girder extending in the longitudinal direction of the temporary bridge and a second girder spaced apart from the first girder in the width direction of the temporary bridge;
a second girder portion disposed at one end of the first girder and the second girder in the longitudinal direction and including a third girder and a fourth girder spaced apart in the width direction;
an upper connection part disposed simultaneously on the upper flange of the first girder part and the second girder part to connect the first girder part and the second girder part to each other, and protruding from the upper flange by a first step; and
It includes a first cover plate disposed to cover the upper portions of the first girder portion and the second girder portion, and a portion of the cover plate is supported by being disposed on the upper connection portion,
The first covering plate is,
a central portion having a first height; and
A support portion disposed on both sides of the central portion, contacting the upper connection portion, and having a second height smaller than the first height to accommodate the first step,
The upper connection part is,
A joint member formed in the shape of a plate and disposed simultaneously on the upper flange surface of the first girder portion and the second girder portion, and through which a plurality of through holes are formed;
a plurality of bolt members simultaneously penetrating the joint member and the upper flange along the through hole;
a plurality of nut members fastened to the bolt member; and
A temporary bridge comprising a flattening member for flattening a protruding portion caused by the head portion of the bolt member. According to claim 1,
It further includes a second covering plate disposed adjacent to the first covering plate and formed to have the same overall height without the support portion,
A temporary bridge, wherein the first covering plate and the second covering plate form the same plane. delete According to claim 1,
The upper connection portion is disposed on the joint member and further includes a washer through which the bolt member penetrates,
The flattening member is,
a washer receiving plate disposed on an upper portion of the joint member and formed in a plate shape with a receiving hole formed on the inside to surround the washer;
a bolt accommodating plate disposed on an upper part of the washer accommodating plate and formed in the shape of a plate, with a rectangular through hole formed on the inner side corresponding to the shape of the head of the bolt member; and
A temporary bridge comprising: an elastic plate formed of a material having elastic force, disposed on an upper part of the bolt receiving plate and in contact with the support portion. According to claim 1,
A temporary bridge wherein the first height is equal to the sum of the second height and the first step. According to claim 1,
The first covering plate further includes a reinforcing portion formed to protrude from a portion of the supporting portion by the first step to be in contact with the upper flange,
A temporary bridge, wherein the reinforcing part is manufactured separately from the supporting part and then coupled to the supporting part. According to claim 1,
The support portion has a support surface at its lower portion to face the upper connection portion,
A temporary bridge in which a space is formed between the support surface and the upper flange. According to claim 1,
The temporary bridge is a temporary bridge that is used as all or part of a covering structure at a subway site, underground structure site, or sewer pipe site. As a temporary bridge construction method using the temporary bridge according to paragraph 1,
Placing the first girder part and the second girder part on site;
Connecting the first girder portion and the second girder portion through the upper connection portion;
disposing the first cover plate on the upper connection portion; and
A temporary bridge construction method including; arranging a second covering plate at a position adjacent to the first covering plate to form the same plane as the first covering plate.

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