Apparatus for Temporary Bridge having Transverse Beam Structure Integrated with Rib Reinforcement and Construction Method thereof

Abstract

The present invention relates to a temporary bridge having a rib-reinforced integrated transverse beam structure and a method for constructing a temporary bridge. The temporary bridge comprises: a transverse beam having a plurality of receiving grooves that are spaced unevenly and open downwards; a connecting plate that is welded to the transverse beam while inserted into the inner side of the receiving grooves; a girder that is inserted into each receiving groove of the transverse beam, connected to the connecting plate, and perpendicular to the transverse beam; and side brackets that are welded and fixed to both sides of the girder and connected to the transverse beam. The temporary bridge having the rib-reinforced integrated transverse beam structure of the present invention, as described above, can improve structural efficiency by flexibly designing the girder spacing according to load conditions through varying the spacing of the girder coupling grooves formed in the transverse beam. In addition, by forming different sizes of the girder coupling grooves, girders of different sizes can be simultaneously applied to a single transverse beam structure, enabling customized design according to site conditions. Furthermore, since the transverse beam structure is reinforced through ribs, local buckling resistance and load-carrying capacity against shear and bending are significantly improved, allowing for stable structural performance even under concentrated load conditions.

Description

Technology Field

[0001] The present invention relates to a temporary bridge and a method for constructing a temporary bridge, and more specifically, to a temporary bridge having a rib-reinforced integrated transverse beam structure and a method for constructing a temporary bridge. Background Technology

[0002] A temporary bridge refers to a bridge installed temporarily to facilitate the movement of construction vehicles or workers before a permanent bridge is installed. Temporary bridges are constructed by vertically installing multiple supports on the riverbed, arranging girders side by side on top of the supports, and then installing decking plates on top.

[0003] Meanwhile, as the working loads applied to temporary bridges have recently been increasing, the structural safety design of temporary bridges is being treated with greater importance. In particular, concentrated loads such as heavy cranes and heavy equipment apply not only bending moments but also local shear forces, and these load conditions are bound to place a structural burden on the components of temporary bridges.

[0004] In order to ensure structural safety, a method of securing overall stiffness by applying large H-beams has been used in the past; however, this method causes problems such as increased structural weight, difficulties in transporting and handling materials, and increased construction costs, and can also act as a disadvantage in terms of structural shape constraints or space utilization. In addition, transverse beams used in conventional temporary bridges had limitations in that they could not adequately respond to shear forces or bending moments that occur locally due to live loads or concentrated loads.

[0005] There is a need for the development of a temporary bridge equipped with a structure that can effectively respond to shear force and bending moment while also ensuring constructability. The problem to be solved

[0006] The present invention was created to resolve the above-mentioned problems and aims to provide a temporary bridge having a rib-reinforced integrated transverse beam structure and a method for constructing a temporary bridge, which allows for flexible adjustment of girder spacing according to load conditions, enables the application of girders of various sizes, and simultaneously ensures structural stability and constructability through rib reinforcement. means of solving the problem

[0007] A temporary bridge having a rib-reinforced integrated transverse beam structure according to the present invention, as a means of solving the problem for achieving the above objective, comprises: a transverse beam having a plurality of receiving grooves that are unevenly spaced and open downwards; a connecting plate that is welded to the transverse beam while inserted into the inner side of the receiving grooves; a girder that is inserted into each receiving groove of the transverse beam, connected to the connecting plate, and perpendicular to the transverse beam; and side brackets that are welded fixed to both sides of the girder and connected to the transverse beam.

[0008] In addition, the above transverse beam and girder take the form of an I-beam, and the connecting plate is welded to the web of the transverse beam, parallel to the upper flange, and tightly connected to the upper flange of the girder.

[0009] In addition, a reinforcing member is further provided between the upper flange of the above-mentioned crossbeam and the connecting plate.

[0010] In addition, a temporary bridge having a rib-reinforced integrated transverse beam structure of the present invention, as a means of solving the problem for achieving the above objective, comprises: an I-beam shaped transverse beam having a plurality of receiving grooves that are uniformly spaced and open downwards; a connecting plate that is welded to the transverse beam while inserted into the inner side of the receiving grooves; an I-beam shaped girder that is inserted into each receiving groove of the transverse beam, connected to the connecting plate, and perpendicular to the transverse beam; and side brackets that are welded and fixed to both sides of the girder and connected to the transverse beam, wherein the connecting plate is welded to the web of the transverse beam and closely connected to the upper flange of the girder, and a reinforcing member is further provided between the upper flange of the transverse beam and the connecting plate.

[0011] In addition, the upper flange of the above connecting plate and the girder are bolted together, and the bolted connection is positioned lower than the upper flange of the transverse beam.

[0012] In addition, the above reinforcing member is symmetrically positioned on the opposite side with the web of the transverse beam in between.

[0013] In addition, the above reinforcing member is a beam having a certain cross-sectional shape in the longitudinal direction of the transverse beam.

[0014] In addition, the spacing of the receiving grooves becomes narrower from the center of the horizontal beam toward the edge.

[0015] In addition, the size of the receiving groove located close to both ends of the above-mentioned cross beam is relatively smaller than the size of the receiving groove in the center of the cross beam.

[0016] Furthermore, the method for constructing a temporary bridge having a rib-reinforced integrated transverse beam structure according to the present invention, as a means of solving the problem for achieving the above objective, comprises: a transverse beam structure preparation step of preparing a transverse beam that extends in the longitudinal direction and has a plurality of receiving grooves formed on its lower side that are open downwards; a girder preparation step of preparing a girder that can be fitted into the receiving grooves; a fitting step of fitting a part of the girder into the receiving grooves of the transverse beam; and an assembly step of connecting the transverse beam to the girder.

[0017] In addition, the above transverse beam and girder take the form of an I-beam, and the transverse beam structure preparation step further includes a connecting plate welding process in which a connecting plate, which is insertable into the receiving groove, is connected to the web of the transverse beam and connected parallel to the upper flange of the transverse beam, and a rib welding process in which a reinforcing member parallel to the transverse beam is fixed between the connecting plate and the upper flange.

[0018] In addition, the receiving grooves are spaced at uniform or non-uniform intervals along the length of the cross beam.

[0019] In addition, the girder preparation step includes a side bracket fixing process in which side brackets are welded and fixed to the webs on both sides of the girder.

[0020] In addition, the above assembly step is a process of connecting the lower flange of the above cross beam to the side bracket. Effects of the invention

[0021] A temporary bridge having a rib-reinforced integrated transverse beam structure according to the present invention, as described above, can improve structural efficiency by flexibly designing the girder spacing according to load conditions through varying the spacing of the girder coupling grooves formed in the transverse beam.

[0022] In addition, by forming girder connection grooves of different sizes, girders of varying sizes can be simultaneously applied to a single transverse beam structure, enabling customized design according to site conditions.

[0023] In addition, since the transverse beam structure is reinforced through ribs, the resistance to local buckling and load-carrying capacity against shear and bending is greatly improved, so that stable structural performance can be achieved even under concentrated load conditions. Brief explanation of the drawing

[0024] FIG. 1 is a schematic perspective view illustrating a temporary bridge having a rib-reinforced integrated cross beam structure according to one embodiment of the present invention. FIGS. 2 to 4 are drawings for explaining the configuration of an integrated cross beam structure applicable to the temporary bridge of FIG. 1. FIGS. 5 to 7 are drawings for explaining different configurations of an integral cross beam structure applicable to the temporary bridge of FIG. 1. FIGS. 8 to 10 are drawings for explaining another configuration of an integral cross beam structure applicable to the temporary bridge of FIG. 1. FIG. 11 is a side view of a crossbeam applicable to a temporary bridge according to one embodiment of the present invention. Figure 12 is a cross-sectional view along line A-A' of Figure 11. FIGS. 13 to 15 are drawings for explaining the configuration of another transverse beam applicable to a temporary bridge according to one embodiment of the present invention. FIG. 16 is a flowchart showing a method for constructing a temporary bridge according to one embodiment of the present invention. Specific details for implementing the invention

[0025] Hereinafter, one embodiment according to the present invention will be described in more detail with reference to the attached drawings.

[0026] FIG. 1 is a schematic perspective view illustrating a temporary bridge (10) having a rib-reinforced integrated cross beam structure according to one embodiment of the present invention.

[0027] As described above, the temporary bridge (10) according to the present embodiment may include a plurality of columns (11), girders (13), cross beam structures (20), and decking plates (17).

[0028] The columns (11) are fixed vertically to the ground or riverbed and support the girder (13) placed on top. The columns (11) serve to transfer the load acting on the temporary bridge (10) to the ground. The size or spacing of the columns (11) may vary depending on the load conditions and construction environment.

[0029] A girder (13) is a structural beam installed horizontally at the top of a column (11), and a number of them are arranged parallel to each other. As shown in FIG. 2, the girder (13) may be an I-beam shaped steel. The girder (13) consists of a horizontal upper flange (13a), a lower flange (13c), and a vertical web (13b) connecting them. A number of bolt holes for passing bolts may be formed in the upper flange (13a).

[0030] The cross beam structure (20) is an assembly composed of a cross beam (21), a connecting plate (23), and a reinforcing member. The cross beam (21) is perpendicular to the girder (13) of the temporary bridge (10) and serves to distribute the load coming down from the deck plate (17). Additionally, the connecting plate (23) is a plate-shaped member for connecting the cross beam (21) and the girder (13). Furthermore, the reinforcing member is an auxiliary member for supplementing the shear and bending stiffness of the cross beam (21), and is a straight member having a certain cross-sectional shape in the longitudinal direction of the cross beam. A detailed description thereof will be provided later.

[0031] FIGS. 2 to 4 are drawings for explaining the configuration of an integrated cross beam structure (20) applicable to the temporary bridge of FIG. 1. FIG. 3 is a side view of the cross beam structure (20) shown in FIG. 2 connected to a girder (13).

[0032] As described above, the cross beam structure (20) may include a cross beam (21), an I-shaped rib (25), and a connecting plate (23).

[0033] The cross beam (21) is an I-shaped beam and includes an upper flange (21a), a lower flange (21c), and a web (21b). Additionally, a plurality of receiving grooves (21e) are formed in the cross beam (21). The receiving grooves (21e) are U-shaped grooves that are open downwards.

[0034] The spacing between the receiving grooves (21e) may all be the same or different. In other words, the size of some receiving grooves (21e) may be relatively smaller or larger than the size of other receiving grooves (21e). Also, the spacing between the receiving grooves (21e) may be uniform or non-uniform. Uniform means that the spacing between the receiving holes (21e) is constant. Non-uniform means that the spacing between the receiving holes (21e) is not constant; for example, the spacing between the receiving holes (21e) is close in the part where a large concentrated load is applied, and the spacing between the receiving grooves (21e) is relatively wide in the part where a relatively smaller concentrated load is applied. The size or spacing of the receiving grooves (21e) can be determined during the design of the temporary bridge.

[0035] Additionally, the connecting plate (23) is a plate-shaped member that is welded to the cross beam (21) while inserted into the inner side of the receiving groove (21e). The connecting plate (23) is a steel plate having a certain thickness and is welded to the web (21b) of the cross beam.

[0036] The connecting plate (23) is spaced parallel to the upper flange (21a). By separating the connecting plate (23) from the upper flange (21a), the bolting portion (16) is positioned below the upper flange (21a), as shown in FIG. 3. The bolting portion (16) refers to a bolt and nut assembly that connects the connecting plate (23) and the upper flange (13a) of the girder. Since the bolting portion, i.e., the bolting portion (16), is positioned lower than the upper flange (21a) of the cross beam, even if the bolting portion (16) protrudes above the girder (13), the decking plate (17) can be placed on the girder (13) without interference from the bolting portion (16). In other words, when installing the decking plate (17) on the girder (13), the decking plate (17) does not catch on the bolting portion (16), thereby improving constructability.

[0037] As shown in FIG. 4, the connecting plate (23) is bolted to the upper flange (13a) of the girder (13) in close contact. To this end, a plurality of bolt holes (not shown in the drawing) through which bolts pass are formed in the connecting plate (23) and the upper flange (13a).

[0038] The above-described I-rib (25) is a reinforcing member and is located between the upper flange (21a) of the cross beam (21) and the connecting plate (23), as shown in FIG. 3. The upper end of the I-rib (25) is welded to the upper flange (21a), and the lower end is welded to the connecting plate (23). Additionally, the I-rib (25) is symmetrically positioned on opposite sides with the web (21b) of the cross beam in between.

[0039] The I-shaped rib (25) simultaneously reinforces the bending stiffness of the transverse beam (21) in the strong axis direction and the weak axis direction, and also improves resistance to local buckling or shear. In particular, it can provide stability to the entire structure in load concentration sections. The I-shaped rib (25) may have the same material as the transverse beam (21).

[0040] Meanwhile, the girder (13) is an I-beam and has an upper flange (13a), a lower flange (13c), and a web (13b). The girder (13) is bolted to the connecting plate (23) while inserted into each receiving groove (21e) of the transverse beam (21). The girder (13) extends orthogonally to the transverse beam (21) and parallel to each other. Since the girder (13) is inserted and connected into the receiving groove (21e), the spacing of the girder (13) varies according to the spacing of the receiving groove (21e). Even so, the girder (13) extends orthogonally to the transverse beam (21) and parallel to each other.

[0041] In addition, side brackets (15) are welded to both sides of the girder (13). The side brackets (15) are structures formed of steel plates and are symmetrically positioned on opposite sides with the web (13b) of the girder in between.

[0042] The side bracket (15) has a girder connection part (15a) and a transverse beam connection part (15c). The girder connection part (15a) is a part that is welded to the bottom surface of the upper flange (13a) of the girder (13), the top surface of the lower flange, and the web (13b). Additionally, the transverse beam connection part (15c) is a part that is orthogonal to the girder connection part (15a) and is horizontal. The transverse beam connection part (15c) contacts the bottom surface of the lower flange (21c) of the transverse beam (21) when the girder (13) is inserted into the receiving groove (21e). The lower flange of the transverse beam (21) is bolted to the transverse beam connection part (15c).

[0043] FIGS. 5 to 7 are drawings for explaining different configurations of an integrated cross beam structure (20) applicable to the temporary bridge (10) of FIG. 1.

[0044] Hereinafter, drawing symbols identical to those described above indicate identical components of the same function, and a repeated description thereof is omitted.

[0045] As described above, a T-shaped rib (27) may be applied as a reinforcing member. The T-shaped rib (27) has a cross-sectional shape of approximately a T and is a straight member extended in the longitudinal direction. The T-shaped rib (27) is positioned on opposite sides with the web (21b) in between and is symmetrical. Additionally, as shown in FIG. 6, the upper end of the T-shaped rib (27) is welded to the lower surface of the upper flange (21a) of the cross beam (21). Also, the lower end of the T-shaped rib (27) is welded to the connecting plate (23).

[0046] The T-shaped rib (27) is located between the upper flange (21a) and the connecting plate (23) and can extend the resistance to shear and bending. For example, even if a load is concentrated along the location where the T-shaped rib (27) is formed, local buckling or deformation can be prevented, thereby further improving the stability of the temporary bridge (10).

[0047] FIGS. 8 to 10 are drawings for explaining another configuration of an integrated cross beam structure (20) applicable to the temporary bridge of FIG. 1.

[0048] Referring to the drawing, it can be seen that an L-shaped rib (29) is applied as the reinforcing member. The L-shaped rib (29) is positioned on opposite sides with the web (21b) in between and is symmetrical. Additionally, each L-shaped rib (29) is welded to the web (21b) and the connecting plate (23) in contact with each other. As described above, by fixing two L-shaped ribs (29) symmetrically, resistance to local shear force or bending moment is strengthened, and the overall stability and durability of the temporary bridge (10) are improved. In particular, by providing a reinforcing effect across both the strong axis and weak axis directions, it is possible to effectively respond to various load conditions.

[0049] FIG. 11 is a side view of a transverse beam applicable to a temporary bridge according to one embodiment of the present invention, and FIG. 12 is a cross-sectional view along line A-A' of FIG. 11.

[0050] As described above, a pair of L-shaped ribs (29) may also be added to the lower side of the web (21b) of the cross beam (21). The L-shaped ribs (29) are fixed on opposite sides with the web (21b) in between. By applying the L-shaped ribs (29) to both the upper and lower sides of the web (21b) in this manner, a reinforcing effect is symmetrically provided in the vertical direction, thereby ensuring a structural balance between the local buckling resistance and shear stiffness of the cross beam structure (20). Accordingly, the structural stability and load-bearing capacity of the entire temporary bridge (10) are further improved.

[0051] FIG. 13 is a side view illustrating another example of a cross beam (21) applicable to a temporary bridge according to one embodiment of the present invention.

[0052] As described above, a plate rib (31) can be welded and fixed as a reinforcing member to the web (21b) of the cross beam (21). The plate rib (31) is a steel plate of a certain thickness that partially covers the web (21b) of the cross beam (21). The plate rib (31) is symmetrically attached to both sides of the web (21b). The plate rib (31) can have an advantageous effect in preventing bending or buckling caused by vertical loads acting on the cross beam (21). The shape and area of ​​the plate rib (31) can be selectively adjusted according to structural requirements, allowing for flexible application in various construction environments.

[0053] FIG. 14 is a drawing for explaining the configuration of another cross beam (21) applicable to a temporary bridge according to one embodiment of the present invention.

[0054] As described above, the size of the receiving grooves (21e) formed in the cross beam (21) may not be uniform overall and may vary. For example, the size of some receiving grooves (21e) may be larger or smaller than the size of other receiving grooves (21e). In this description, 'size' refers to the height (H) of the receiving grooves (21e). In the case of FIG. 14, the height (H) of the receiving grooves located close to both ends of the cross beam is relatively lower than the height of the central receiving groove.

[0055] In this way, by forming the receiving groove (21e) with different sizes, girders (13) of different heights can be selectively applied depending on each location. For example, a low-height girder (13) (a girder located at both ends of the left and right sides in FIG. 14) can be used in areas where the structural load is relatively small, and a higher girder (13) can be applied at points where the load is relatively large, thereby ensuring structural stability while reducing the overall weight of the temporary bridge (10) and reducing the amount of steel used. The height of the girder is the distance from the upper flange to the lower flange.

[0056] FIG. 15 is a drawing for explaining the configuration of another cross beam (21) applicable to a temporary bridge (10) according to one embodiment of the present invention.

[0057] As illustrated, the spacing of the receiving grooves (21e) may not be uniform and may be positioned differently. That is, the receiving grooves (21e) are not arranged at regular intervals, but may be arranged non-uniformly depending on the load conditions. For example, as illustrated in FIG. 15, the spacing of the receiving grooves (21e) may be formed in a shape that gradually narrows from the center of the cross beam (21) toward both edges.

[0058] The above-described arrangement configuration ensures load-bearing capacity by closely arranging girders (13) in sections where concentrated loads are applied in the actual usage environment of the temporary bridge (10), and by arranging girders (13) at wide intervals in sections where loads are relatively low, thereby allowing for a reduction in the amount of steel used while maintaining structural efficiency.

[0059] FIG. 16 is a flowchart showing a method for constructing a temporary bridge according to one embodiment of the present invention.

[0060] As described above, the method for constructing a temporary bridge according to the present embodiment may include a step for preparing a cross beam structure (101), a step for preparing a girder (103), a step for fitting and joining (105), and an assembly step (107).

[0061] The cross beam structure preparation step (101) is a process for manufacturing the above-mentioned cross beam structure (20) and includes a receiving groove forming process (101a), a rib welding process (101b), and a joining plate welding process (101c).

[0062] The receiving groove formation process (101a) is a process of forming the receiving groove (21e) by cutting off a part of the cross beam (21). The spacing and size of the receiving groove (21e) formed at this time may vary depending on the load distribution in the temporary bridge (10) or the arrangement plan of the girder (13).

[0063] Additionally, the rib welding process (101b) is a process of welding reinforcing members, namely ribs (25, 27, 29, 31), to both sides of the web (21b) of the cross beam (21). The welded ribs are positioned on opposite sides with the web in between and form a symmetrical structure.

[0064] The joining plate welding process (101c) is a process of joining a joining plate (23), which can be inserted into the receiving groove (21e), to the web (21b) of the cross beam (21) by welding it. After the joining plate welding process is completed, the joining plate (23) is spaced parallel to the upper flange (21a) of the cross beam. At this time, parts of the I-shaped rib (25), T-shaped rib (27), and L-shaped rib (29) are positioned between the joining plate (23) and the upper flange (21a). Additionally, when welding the joining plate (23) to the web (21b) of the cross beam (21), the ribs are also welded to the joining plate (23).

[0065] The girder preparation step (103) is a process of preparing a girder (13) to be fitted into a receiving groove (21e) and includes a side bracket fixing process (103a). The side bracket fixing process (103a) is a process of welding and fixing side brackets to the webs (13b) on both sides of the girder (13).

[0066] The subsequent fitting step (105) is a process of fitting a part of the girder (13) into the receiving groove (21e) of the cross beam (21). That is, it is a process of fitting the girder (13) into the receiving groove (21e) so that the upper flange (13a) of the girder comes into close contact with the connecting plate (23).

[0067] After the fitting step (105) is completed, the assembly step (107) follows. The assembly step (107) is a process of joining the cross beam (21) and the girder (13) together to form an integrated whole. This process includes the step of joining the lower flange of the cross beam to the cross beam joining part (15c) of the side bracket while a part of the girder is inserted into the receiving groove (21e) of the cross beam.

[0068] As described above, the temporary bridge (10) according to the present embodiment can effectively overcome the structural limitations of existing temporary bridges by applying a rib-reinforced integrated cross beam structure (20). In addition, structural efficiency and material reduction effects can be realized simultaneously by applying differential spacing and size of girders to respond to various load conditions. Furthermore, by symmetrically welding the ribs, which are reinforcing members, shear and bending stiffness are strengthened, providing high safety and stability even in work environments where heavy equipment or concentrated loads are applied.

[0069] Although the present invention has been described in detail through specific embodiments, the present invention is not limited to the above embodiments, and various modifications can be made by those skilled in the art within the scope of the technical concept of the present invention. Explanation of the symbols

[0070] 10: Temporary bridge 11: Column 13: Girder 13a: Upper flange 13b: Web 13c: Lower flange 15: Side bracket 15a: Girder connection 15c: Transverse beam connection 16: Bolting section 17: Decking plate 20: Transverse beam structure 21: Transverse beam 21a: Upper flange 21b: Web 21c: Lower flange 21e: Receiving groove 23: Connection plate 25: I-rib 27: T-rib 29: L-rib 31: Plate-shaped rib

Claims

Claim 1 A temporary bridge having a rib-reinforced integrated crossbeam structure comprising: a crossbeam having a plurality of receiving grooves that are unevenly spaced and open to the bottom; a connecting plate that is inserted into the inner side of the receiving groove and welded to the crossbeam; a girder that is inserted into each receiving groove of the crossbeam, connected to the connecting plate, and perpendicular to the crossbeam; side brackets that are welded and fixed to both sides of the girder and connected to the crossbeam; and reinforcing members that are located on both sides of the crossbeam and fixed to the crossbeam parallel to the crossbeam, wherein the crossbeam and the girder take the form of an I-beam and, when viewed individually, have a lower flange and an upper flange that are sequentially positioned and a web connecting the lower flange and the upper flange, and the reinforcing member is horizontally positioned along the longitudinal direction of the crossbeam at the perpendicular portion between the girder and the crossbeam and in the area between two adjacent girders and welded to the connecting plate and the upper flange of the crossbeam or the connecting plate and the web of the crossbeam. Claim 2 delete Claim 3 delete Claim 4 The invention comprises an I-beam shaped transverse beam having a plurality of receiving grooves that are uniformly spaced and open downwards, a connecting plate that is inserted into the inner side of the receiving grooves and welded to the transverse beam, an I-beam shaped girder that is inserted into each receiving groove of the transverse beam, connected to the connecting plate, and orthogonal to the transverse beam, side brackets that are welded and fixed to both sides of the girder and connected to the transverse beam, and reinforcing members located on both sides of the transverse beam and fixed to the transverse beam parallel to the transverse beam, wherein the transverse beam and the girder take the form of an I-beam and, when viewed individually, have a lower flange and an upper flange located sequentially, and a web connecting the lower flange and the upper flange, and the reinforcing member is horizontally positioned along the length direction of the transverse beam at the orthogonal portion between the girder and the transverse beam and in the area between two adjacent girders and welded to the connecting plate and the upper flange of the transverse beam or the connecting plate and the web of the transverse beam, or along the length direction of the transverse beam at the orthogonal portion between the girder and the transverse beam and two A rib reinforcement, horizontally positioned as a first reinforcing member in the area between two adjacent girders and welded to the connecting plate and web of the transverse beam, and horizontally positioned as a second reinforcing member in the area between two adjacent girders and welded to the web of the transverse beam so as to be closer to the lower flange of the transverse beam than to the upper flange of the transverse beam, or, when viewed in the orthogonal order of the girders along the longitudinal direction of the transverse beam, positioned in a U-shape at adjacent first and second orthogonal sections and between the first and second orthogonal sections, welded to the web of the transverse beam so as to partially cover the web of the transverse beam on the connecting plate of the transverse beam when positioned at the first and second orthogonal sections, and welded to the web of the transverse beam so as to be closer to the lower flange of the transverse beam than to the upper flange of the transverse beam when positioned between the first and second orthogonal sections, and positioned in an inverted U-shape at a third orthogonal section spaced apart from the first or second orthogonal section and welded to the web of the transverse beam so as to surround the receiving groove of the third orthogonal section. Temporary bridge having an integrated cross beam structure. Claim 5 A temporary bridge having a rib-reinforced integrated transverse beam structure, wherein, in claim 1 or 4, the upper flange of the connecting plate and the girder are bolted together, and the bolted connection portion is positioned lower than the upper flange of the transverse beam. Claim 6 delete Claim 7 delete Claim 8 A temporary bridge having a rib-reinforced integrated crossbeam structure, wherein the spacing of the receiving grooves narrows from the center of the crossbeam toward the edge in the first paragraph. Claim 9 A temporary bridge having a rib-reinforced integrated crossbeam structure, wherein, in claim 1, the size of the receiving groove located close to both ends of the crossbeam is relatively smaller than the size of the receiving groove in the center of the crossbeam. Claim 10 The method comprises a step of preparing a transverse beam structure, wherein a transverse beam is prepared that extends in the longitudinal direction and has a plurality of receiving grooves formed on its lower side that are open to the lower side; a step of preparing a girder that can be fitted into the receiving grooves; a fitting step of fitting a part of the girder into the receiving grooves of the transverse beam; and an assembly step of connecting the transverse beam to the girder, wherein the transverse beam and the girder take the form of an I-beam and have a lower flange and an upper flange that are sequentially positioned when viewed individually, and a web connecting the lower flange and the upper flange, wherein the step of preparing the transverse beam structure further includes a welding process for a connecting plate that is fitted into the receiving grooves and connects it to the web of the transverse beam, connecting it parallel to the upper flange of the transverse beam, and a rib welding process for fixing a reinforcing member to the transverse beam parallel to the transverse beam on both sides of the transverse beam, wherein the reinforcing member is formed along the longitudinal direction of the transverse beam at the orthogonal portion between the girder and the transverse beam and two adjacent A method for constructing a temporary bridge having a rib-reinforced integral transverse beam structure that is positioned horizontally in the area between girders and welded to the connecting plate of the transverse beam and the upper flange or the connecting plate of the transverse beam and the web. Claim 11 delete Claim 12 In claim 10, the above receiving groove is a method for constructing a temporary bridge having a rib-reinforced integrated cross beam structure having uniform or non-uniform spacing along the longitudinal direction of the cross beam. Claim 13 A method for constructing a temporary bridge having a rib-reinforced integrated transverse beam structure, wherein, in the girder preparation stage of claim 12, a side bracket fixing process is included in which side brackets are welded and fixed to the webs on both sides of the girder. Claim 14 A method for constructing a temporary bridge having a rib-reinforced integrated crossbeam structure, wherein, in Clause 13, the assembly step is a process of joining the lower flange of the crossbeam to a side bracket.

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