Camber adjustment device of prefabricated truss bridge and prefabricated truss bridge having same

Abstract

Disclosed are a camber adjustment device of a prefabricated truss bridge and a prefabricated truss bridge having same. According to one aspect of the present invention, a camber adjustment device of a prefabricated truss bridge formed by assembling truss panels, including upper members, lower members, vertical members, and diagonal members, in one direction may be provided, the camber adjustment device including connection members that are provided at both ends of the upper members and lower members and connect the upper members and lower members to the neighboring upper members and lower members, wherein the connection members can be adjusted in length from both ends of the upper members and lower members by a length adjustment means.

Description

Camber adjustment device for a prefabricated truss bridge and a prefabricated truss bridge having the same

[0001] The present invention relates to a camber adjustment device for a prefabricated truss bridge and a prefabricated truss bridge having the same, and more particularly, to a camber adjustment device for a prefabricated truss bridge capable of adjusting camber to a desired level to compensate for deflection due to load, and a prefabricated truss bridge having the same.

[0002] In general, a truss structure is a skeletal structure in which the members are connected with pins at the joints to prevent bending. Arch, suspension, and beam types are commonly used. These truss structures are widely used as lightweight, heavy-duty architectural / civil engineering members. Truss bridges are a representative example of such truss structures.

[0003] One type of truss bridge, the prefabricated truss bridge, is constructed by continuously connecting truss panels, which are single units, along their length. More specifically, a truss panel consists of a top chord, a bottom chord, and multiple vertical members and diagonal members connecting the two chords. The vertical members and diagonal members are fixed to the top and bottom chords at one end and the other end by welding. Furthermore, connectors are provided at both ends of the top and bottom chords to connect adjacent chords via pins.

[0004] However, existing prefabricated truss bridges have the same length of upper and lower chords, so they are assembled in a straight line, but they have the problem of deflection due to self-weight and surcharge load. When this deflection occurs, the driver's field of vision is directed toward the ground when entering the bridge, which makes them feel uneasy, and the vehicle's drivability is also deteriorated. Therefore, to compensate for this, camber, which causes the initial shape to rise upward, was introduced when manufacturing prefabricated truss bridges. However, existing prefabricated truss bridges are constructed without any consideration of camber.

[0005] One aspect of the present invention is to provide a camber adjustment device for a prefabricated truss bridge, which can introduce camber into the prefabricated truss bridge and adjust the camber according to the installation location and the length of the bridge, and a prefabricated truss bridge having the same.

[0006] According to one aspect of the present invention, a camber adjustment device for an assembly-type truss bridge formed by assembling truss panels composed of an upper chord, a lower chord, a vertical member, and a diagonal member in one direction may be provided, the camber adjustment device for an assembly-type truss bridge including connecting members provided at each of the two ends of the upper chord and the lower chord to connect the upper chord and the lower chord to the adjacent upper chord and the lower chord, wherein the connecting members are provided such that their lengths can be adjusted from each of the two ends of the upper chord and the lower chord by a length adjustment means.

[0007] According to another aspect of the present invention, there is provided an assembly-type truss bridge comprising: a truss panel comprising a top chord, a bottom chord, a vertical member, and a diagonal member; connecting members provided at each end of the top chord and the bottom chord to connect the top chord and the bottom chord to adjacent top chords and bottom chords; and a fastening member for connecting and fixing the connecting members of the adjacent truss panels; wherein the connecting members are provided such that their lengths can be adjusted from each end of the top chord and the bottom chord by a length adjusting means, and each truss panel is assembled such that the total length of the top chord including the length of the connecting member is longer than the total length of the bottom chord including the length of the connecting member, thereby forming a camber.

[0008] The length adjusting means may include a plurality of bolt holes formed at regular intervals along the longitudinal direction of the upper and lower current chords; a connecting member provided with a plurality of through holes corresponding to the plurality of bolt holes so that a portion thereof is inserted inward from both ends of the upper and lower current chords; and a fixing bolt that adjusts the insertion length of the connecting member to restrict movement of the connecting member through the bolt holes and the through holes.

[0009] The above connecting member may include a connecting portion having a connecting hole formed therein, into which a connecting member is assembled so as to be connected and fixed with connecting members provided in adjacent upper and lower currents; and an insertion portion formed to extend from the connecting portion and having a plurality of through holes formed therein.

[0010] As one embodiment of the present invention, the length adjustment means may include a hydraulic cylinder inserted and fixed to both ends of the upper current and the lower current; and the connecting member provided to be able to advance and retreat according to the operation of the hydraulic cylinder.

[0011] The above connecting member may include a connecting portion having a connecting hole formed therein into which a connecting member is assembled so as to be connected and fixed with connecting members provided in adjacent upper and lower currents; and an insertion portion formed to extend from the connecting portion and slidably inserted into the hydraulic cylinder.

[0012] As another embodiment of the present invention, the length adjusting means may include a coupling part that is inserted and fixed to both ends of the upper and lower current spur and has a coupling hole with a female thread formed on the inside; and the connecting member that is screw-connected with the female thread of the coupling hole so as to be able to advance and retreat in the rotational direction.

[0013] The above connecting member may include a connecting portion having a connecting hole formed therein into which a connecting member is assembled so as to be connected and fixed with connecting members provided in adjacent upper and lower currents; and an insert portion extending from the connecting portion and having a male thread formed on an outer circumference thereof to be screw-connected with the female thread.

[0014] In another embodiment of the present invention, the length adjusting means may include an intermediate connecting portion inserted into both ends of the upper and lower chords and having inner wedge-shaped protrusions formed on both inner sides along the longitudinal direction; a connecting member having an outer wedge-shaped protrusion corresponding to the inner wedge-shaped protrusions and fixed at a predetermined position of the intermediate connecting portion; and a fixing bolt penetrating the upper and lower chords and the intermediate connecting portion to restrict movement of the intermediate connecting portion.

[0015] The above connecting member may include a connecting portion having a connecting hole formed therein into which a connecting member is assembled so as to be connected and fixed with connecting members provided in adjacent upper and lower currents; and an insertion portion extending from the connecting portion and having an outer wedge-shaped protrusion formed on a surface facing the inner wedge-shaped protrusion and matching the inner wedge-shaped protrusion.

[0016] According to one embodiment of the present invention, a camber adjustment device for a prefabricated truss bridge and a prefabricated truss bridge having the same are configured such that the length of connecting members connecting the upper and lower chords to adjacent upper and lower chords can be adjusted, thereby forming the length of the upper chord longer than the length of the lower chord, thereby forming a camber in which the truss bridge is raised upward. Accordingly, it is possible to compensate for deflection due to self-weight and superimposed load, and has the effect of alleviating driver anxiety caused by deflection of existing bridges and improving drivability.

[0017] In addition, it has the effect of being able to adjust the camber required according to the length of the bridge by easily adjusting the length through the connecting member.

[0018] FIG. 1 is a drawing showing a truss panel equipped with a camber adjustment device according to one embodiment of the present invention.

[0019] FIG. 2 is a drawing showing a state of connecting truss panels equipped with a camber adjustment device according to one embodiment of the present invention.

[0020] FIG. 3 is a drawing showing a prefabricated truss bridge to which camber is applied by a camber adjustment device according to one embodiment of the present invention.

[0021] FIG. 4 is a drawing showing a cross-sectional view and a normal cross-sectional view for explaining a length adjustment means of a camber adjustment device according to one embodiment of the present invention.

[0022] Fig. 5 is a drawing showing a cross-sectional view and a normal cross-sectional view showing a state in which the length of the connecting member is adjusted through the length adjustment means of Fig. 4.

[0023] FIG. 6 is a drawing showing a cross-sectional view and a front cross-sectional view for explaining another embodiment of a length adjustment means provided in a camber adjustment device according to one embodiment of the present invention.

[0024] Fig. 7 is a drawing showing a cross-sectional view and a normal cross-sectional view showing a state in which the length of the connecting member is adjusted through the length adjustment means of Fig. 6.

[0025] FIG. 8 is a diagram showing a cross-sectional view and a front cross-sectional view for explaining another embodiment of a length adjustment means provided in a camber adjustment device according to one embodiment of the present invention.

[0026] Fig. 9 is a drawing showing a cross-sectional view and a normal cross-sectional view showing a state in which the length of the connecting member is adjusted through the length adjustment means of Fig. 8.

[0027] FIG. 10 is a diagram showing a cross-sectional view and a front cross-sectional view for explaining another embodiment of a length adjustment means provided in a camber adjustment device according to one embodiment of the present invention.

[0028] Fig. 11 is a drawing showing a cross-sectional view and a normal cross-sectional view showing a state in which the length of the connecting member is adjusted through the length adjustment means of Fig. 10.

[0029] Fig. 12 is a partial cutaway perspective view showing a length adjustment means provided in the camber adjustment device of Fig. 10.

[0030] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided to sufficiently convey the spirit of the present invention to those skilled in the art. The present invention is not limited to the embodiments presented herein and may be embodied in other forms. To clarify the present invention, the drawings may omit portions irrelevant to the description, and the sizes of components may be slightly exaggerated to facilitate understanding.

[0031] FIG. 2 is a drawing showing a truss panel equipped with a camber adjustment device according to an embodiment of the present invention, FIG. 1 is a drawing showing a truss panel equipped with a camber adjustment device according to an embodiment of the present invention, FIG. 2 is a drawing showing a state of connecting truss panels equipped with a camber adjustment device according to an embodiment of the present invention, and FIG. 3 is a drawing showing a prefabricated truss bridge to which a camber is applied by a camber adjustment device according to an embodiment of the present invention.

[0032] Referring to FIGS. 1 to 3, a camber adjustment device of a prefabricated truss bridge (1) according to one aspect of the present invention may include a connecting member (100) whose length is adjustable by a length adjusting means. The connecting member (100) is length-adjustable and serves to connect the upper chord (11) and the lower chord (12) with the neighboring upper chord (11) and the lower chord (12). Specifically, the connecting member (100) may be provided at each of the ends of the upper chord (11) and the lower chord (12) of a truss panel (10) as a single unit. Accordingly, the prefabricated truss bridge (1) may be manufactured by continuously assembling the neighboring truss panel (10) through the connecting member (100).

[0033] Meanwhile, the truss panel (10) may be composed of an upper chord (11), a lower chord (12), a member (13), and a vertical member (14). The upper chord (11) and the lower chord (12) may have a predetermined length and may be provided to have the same length. In addition, the upper chord (11) and the lower chord (12) may be provided to have a pipe shape in which a hollow portion (11a, 12a) is formed along the longitudinal direction therein. At this time, the hollow portion (11a, 12a) may be formed only in a portion where a connecting member (100) is inserted through a length adjusting means to be described later. The upper chord (11) and the lower chord (12) may be provided to have various cross-section shapes such as a circle, a square, and a polygon.

[0034] The upper chord (11) and lower chord (12) are spaced apart from each other at a certain distance, and a plurality of braces (13) and vertical members (14) for load support can be fixedly connected between the upper chord (11) and lower chord (12). That is, the braces (13) and vertical members (14) can be fixed by having both ends connected to the upper chord (11) and lower chord (12). The truss panel (10) including the upper chord (11) and lower chord (12) connected by the vertical members (14) and braces (13) is configured as one unit, and the truss panels (10) of each unit can be connected to manufacture an assembly-type truss bridge.

[0035] A connecting member (100) may be provided at both ends of the upper chord (11) and both ends of the lower chord (12) of the truss panel (10), and each connecting member (100) is provided so that its length can be adjusted by a length adjustment means. For example, the length adjustment of the connecting member (100) by the length adjustment means may be achieved through a bolt fastening structure of a bolt hole, a sliding structure according to hydraulic operation, a screw joint structure, or a wedge-shaped connecting part.

[0036] A length adjustment means according to one embodiment of the present invention will be described with reference to FIGS. 4 and 5.

[0037] FIG. 4 is a drawing showing a plan view and a normal cross-sectional view for explaining a length adjustment means of a camber adjustment device according to one embodiment of the present invention, and FIG. 5 is a drawing showing a plan view and a normal cross-sectional view showing a state in which the length of a connecting member is adjusted through the length adjustment means of FIG. 4.

[0038] Referring to FIGS. 4 and 5, the length adjustment means of the camber adjustment device according to the present embodiment may include a bolt hole (110) formed in the upper current (11) and the lower current (12), a through hole (102a) formed in the connecting member (100), and a fixing bolt (120) inserted and fixed into the bolt hole (110) and the through hole (102a).

[0039] Bolt holes (110) can be formed at regular intervals along the longitudinal direction of the upper chord (11) and the lower chord (12). For example, a plurality of bolt holes (110) are formed in a direction toward the center based on the ends on both sides of the upper chord (11) and the lower chord (12). The bolt holes (110) can be formed penetrating from the front to the rear of the upper chord (11) and the lower chord (12), but are not limited thereto, and can be formed in a vertical direction.

[0040] The connecting member (100) may be provided so that a portion thereof is inserted from both ends of the upper current (11) and the lower current (12). That is, the connecting member (100) may be inserted through the hollow portions (11a, 12a) of the upper current (11) and the lower current (12). This connecting member (100) may include a fastening portion (101) connected to an adjacent connecting member (100), and an insertion portion (102) inserted into the hollow portions (11a, 12a).

[0041] The fastening portion (101) located at one end of the upper current (11) and the lower current (12) is connected to the fastening portion (101) of the connecting member (100) located at the other end of the neighboring upper current (11) and the lower current (12). A fastening hole (101a) into which a fastening member (103) is assembled is formed at the center of this fastening portion (101). Accordingly, when the neighboring fastening portions (101) overlap each other, the fastening holes (101a) are provided so that they are located at the same position. In this state, when the fastening member (103) is inserted into the fastening hole (101a), the neighboring fastening portions (101) can be connected and fixed to each other. At this time, the fastening member (103) may be composed of a pin or a bolt and nut that are inserted into the fastening hole (101a) and fixed.

[0042] The insertion portion (102) may be formed to extend from the fastening portion (101) and be inserted into the hollow portions (11a, 12a) of the upper current (11) and lower current (12). A plurality of through holes (102a) may be formed in the insertion portion (102) to have a spacing corresponding to a plurality of bolt holes (110).

[0043] The fixed bolt (120) is provided to limit the movement of the connecting member (100) through the bolt hole (110) and the through hole (102a). That is, the fixed bolt (120) can be fastened to the bolt hole (110) and the through hole (102a) while adjusting the insertion length of the connecting member (100) so that the bolt hole (110) and the through hole (102a) are aligned. Accordingly, the connecting member (100) can be fixed by adjusting the length in the longitudinal direction of the upper chord (11) and the lower chord (12), and can be connected to the neighboring connecting member (100). At this time, at least one fixed bolt (120) may be provided and provided to be fastened to the bolt hole (110) and the through hole (102a).

[0044] Meanwhile, the fastening portion (101) provided on one side of the upper current (11) and the lower current (12) is provided as a pair of fastening pieces spaced apart from each other, and the fastening portion (101) provided on the other side is provided as a single fastening piece and inserted between the pair of fastening pieces, but is not limited thereto, and the shape thereof may be modified in various ways. For example, if the adjacent upper current (11) and the lower current (12) are not twisted and the adjacent fastening portions (101) are fastened by the fastening member (103), the formation position of the fastening portion (101) may be changed or may have any shape.

[0045] A length adjustment means according to another embodiment of the present invention will be described with reference to FIGS. 6 and 7.

[0046] FIG. 6 is a plan view and a normal cross-sectional view illustrating another embodiment of a length adjustment means provided in a camber adjustment device according to one embodiment of the present invention, and FIG. 7 is a plan view and a normal cross-sectional view illustrating a state in which the length of a connecting member is adjusted through the length adjustment means of FIG. 6.

[0047] Referring to FIGS. 6 and 7, the length adjustment means of the camber adjustment device according to the present embodiment may include a hydraulic cylinder (210) inserted and fixed to both ends of the upper current (11) and the lower current (12), and a connecting member (100) provided to be able to advance and retreat according to the operation of the hydraulic cylinder (210).

[0048] The hydraulic cylinder (210) is provided in a form in which one side is open and can be inserted and fixed to both ends of the upper chord (11) and the lower chord (12), respectively. That is, it can be installed so that the open portion is exposed to both ends of the upper chord (11) and the lower chord (12). At this time, the hydraulic cylinder (210) can be fixed to the upper chord (11) and the lower chord (12) by welding, bolts, etc. This hydraulic cylinder (210) can be provided as a typical hydraulic cylinder that is operated by receiving hydraulic pressure. Accordingly, the connecting member (100) inserted through the open portion of the hydraulic cylinder (210) can be provided so as to be able to advance and retreat according to the operation of the hydraulic cylinder (210).

[0049] The connecting member (100) may be configured such that a portion thereof is inserted inward from an open side of the hydraulic cylinder (210). The connecting member (100) may include a fastening portion (101) connected to an adjacent connecting member (100) and an insertion portion (102) inserted into the hydraulic cylinder (210).

[0050] Here, the fastening portion (101) is provided with the same structure as the fastening portion (101) of the previous embodiment. That is, it can be connected and fixed through the adjacent fastening portion (101) and the fastening member (103). Therefore, a detailed description of the fastening portion (101) in this embodiment will be omitted.

[0051] The insertion portion (102) can be inserted into a hydraulic cylinder (210) and can be arranged to advance and retreat according to the operation of the hydraulic cylinder (210). That is, when the hydraulic cylinder (210) is operated and the insertion portion (102) is advanced toward the adjacent connecting member (100), and the adjacent connecting portions (101) are connected and fixed to each other through the connecting member (103), the connecting portions (101) are maintained in a connected and fixed state.

[0052] A length adjustment means according to another embodiment of the present invention will be described with reference to FIGS. 8 and 9.

[0053] FIG. 8 is a plan view and a normal cross-sectional view illustrating another embodiment of a length adjustment means provided in a camber adjustment device according to one embodiment of the present invention, and FIG. 9 is a plan view and a normal cross-sectional view illustrating a state in which the length of a connecting member is adjusted through the length adjustment means of FIG. 8.

[0054] Referring to FIGS. 8 and 9, the length adjustment means of the camber adjustment device according to the present embodiment may include a connecting member (310) that is inserted and fixed to both ends of the upper current (11) and the lower current (12), and a connecting member (100) that is screw-connected to the connecting member (310).

[0055] The coupling part (310) can be inserted and fixed to each end of the upper current (11) and the lower current (12). At this time, the coupling part (310) can be fixed to the upper current (11) and the lower current (12) by welding, bolts, etc. A coupling hole (311) having a female screw thread (312) formed on the inside is provided in the coupling part (310). At this time, the female screw threads (312) of the coupling hole (311) provided on one side and the other side of the upper current (11) and the lower current (12) can be formed in opposite directions.

[0056] The connecting member (100) may be screw-connected with the female screw thread (312) of the connecting hole (311) so as to be able to advance and retreat in the rotational direction. This connecting member (100) may include a fastening portion (101) connected to an adjacent connecting member (100) and an insertion portion (102) inserted into the connecting hole (311).

[0057] Here, the fastening portion (101) is provided with the same structure as the fastening portion (101) of the previous embodiment. That is, it can be connected and fixed through the adjacent fastening portion (101) and the fastening member (103). Therefore, a detailed description of the fastening portion (101) in this embodiment will be omitted.

[0058] The insertion portion (102) is formed to extend from the fastening portion (101) and may have a male screw thread (102b) formed on the outer surface. Accordingly, the insertion portion (102) is screw-connected with the female screw thread (312) and inserted into the connecting portion (310). That is, the connecting member (100) moves forward and backward from the connecting portion (310) depending on the rotational direction of the connecting member (100).

[0059] Meanwhile, since the female screw threads (312) formed in the coupling holes (311) of the facing coupling portions (310) are formed in opposite directions, the connecting members (100) screw-connected to the respective coupling holes (311) move in the same direction when rotated in opposite directions. For example, when the connecting member (100) located on one side of the upper chord (11) and the lower chord (12) is rotated clockwise, it moves outward, and when the connecting member (100) located on the other side of the upper chord (11) and the lower chord (12) is rotated counterclockwise, it moves outward. Accordingly, it can be arranged to adjust the length by rotating the connected connecting members (100) after connecting and fixing the adjacent connecting members (100) to each other.

[0060] A length adjustment means according to another embodiment of the present invention will be described with reference to FIGS. 8 and 9.

[0061] FIG. 10 is a plan view and a front view for explaining another embodiment of a length adjustment means provided in a camber adjustment device according to one embodiment of the present invention, FIG. 11 is a plan view and a front view for illustrating a state in which the length of a connecting member is adjusted through the length adjustment means of FIG. 10, and FIG. 12 is a partial cutaway perspective view showing the length adjustment means provided in the camber adjustment device of FIG. 10.

[0062] Referring to FIGS. 10 to 12, the length adjustment means of the camber adjustment device according to the present embodiment may include an intermediate connecting portion (410) inserted into both ends of the upper current (11) and the lower current (12), a connecting member (100) inserted and fixed into the intermediate connecting portion (410), and a fixing bolt (420) that restricts movement of the intermediate connecting portion (410).

[0063] The intermediate connecting portion (410) can be inserted into each of the ends of the upper current (11) and the lower current (12). The intermediate connecting portion (410) can have inner wedge-shaped protrusions (412) formed on both inner surfaces along the longitudinal direction. That is, the inner wedge-shaped protrusions (412) can be formed to face each other.

[0064] The connecting member (100) has an outer wedge-shaped protrusion (102c) corresponding to an inner wedge-shaped protrusion (412) and can be selectively fixed to a predetermined position of the intermediate connecting portion (410). This connecting member (100) can include a fastening portion (101) connected to an adjacent connecting member (100) and an insertion portion (102) inserted into the intermediate connecting portion (410).

[0065] Here, the fastening portion (101) is provided with the same structure as the fastening portion (101) of the previous embodiment. That is, it can be connected and fixed through the adjacent fastening portion (101) and the fastening member (103). Therefore, a detailed description of the fastening portion (101) in this embodiment will be omitted.

[0066] The insertion portion (102) may be formed to extend from the fastening portion (101) and may have an outer wedge-shaped protrusion (102c) formed on the outer surface. That is, an outer wedge-shaped protrusion (102a) that matches the inner wedge-shaped protrusion (412) may be formed on the outer surface of the insertion portion (102) to face the inner wedge-shaped protrusion (412). Accordingly, the connection member (100) may be moved forward and backward in the direction of the neighboring connection member (100) and the movement may be fixed through the intermediate connection member (410) while the length is adjusted, and after the length is adjusted, the intermediate connection member (410) may be fixed by the fixing bolt (420).

[0067] The fixed bolt (420) may be provided to penetrate the upper chord (11), the lower chord (12) and the intermediate connection portion (410) to limit the movement of the intermediate connection portion (410). Although not shown, bolt holes may be formed in the intermediate connection portion (410), the upper chord (11) and the lower chord (12) to insert and fix the fixed bolt (420). In addition, these bolt holes (not shown) may be formed at regular intervals along the length direction of the intermediate connection portion (410), and thus bolt holes may be formed in the upper chord (11) and the lower chord (12) at intervals corresponding to the bolt holes.

[0068] The length of the connecting member (100) can be adjusted through the length adjustment means according to the various embodiments as described above. That is, by adjusting the length of the connecting members (100) provided at each end of the upper chord (11) and the lower chord (12) to connect and fix the adjacent truss panels (10), a cambered prefabricated truss bridge (1) can be manufactured. In order to provide such a camber, the length of the connecting member (100) must be adjusted so that the total length of the upper chord (11) including the length of the connecting member (100) (see 'L1' in FIG. 1) is formed longer than the total length of the lower chord (12) including the length of the connecting member (100) (see 'L2' in FIG. 1) (L1 > L2). By assembling neighboring truss panels (10) through a connecting member (100) whose length is adjusted in this way, it is possible to manufacture an assembly-type truss bridge (1) with a camber as shown in Fig. 3.

[0069] Meanwhile, as the length of the connecting member (100) is adjusted, the camber can be easily adjusted by selectively adjusting the length of the connecting member (100) according to the entire length of the bridge.

[0070] As described above, although the present invention has been described by limited embodiments and drawings, the present invention is not limited thereto, and various modifications and variations are possible by a person having ordinary skill in the art to which the present invention pertains within the scope of the technical idea of ​​the present invention and the equivalent scope of the patent claims to be described below.

Claims

1. A camber adjustment device for an assembly-type truss bridge formed by assembling truss panels composed of upper chords, lower chords, vertical members, and diagonal members in one direction. It includes connecting members provided at each end of the upper and lower currents to connect the upper and lower currents with the neighboring upper and lower currents, A camber adjustment device for an assembly-type truss bridge, wherein the above connecting member is provided so that the length can be adjusted from each end of the upper and lower chords by a length adjustment means.

2. In paragraph 1, The above length adjustment means A plurality of bolt holes formed at regular intervals along the longitudinal direction of the upper and lower chords; The connecting member is provided with a plurality of through holes corresponding to the plurality of bolt holes, and is provided so that a portion thereof is inserted inward from both ends of the upper and lower current spur; and A camber adjustment device for an assembly-type truss bridge, comprising: a fixing bolt for controlling the insertion length of the connecting member and limiting the movement of the connecting member through the bolt hole and the through hole; 3. In paragraph 2, The above connecting member A fastening part having a fastening hole formed so that a fastening member is assembled to be connected and fixed with the connecting members provided in the neighboring upper and lower currents; and A camber adjustment device for an assembly-type truss bridge, comprising: an insertion portion formed to extend from the above-mentioned fastening portion and having a plurality of through holes formed therein; 4. In paragraph 1, The above length adjustment means A hydraulic cylinder inserted and fixed at both ends of the upper and lower currents; and A camber adjustment device for an assembly-type truss bridge including the connecting member, which is arranged to be able to advance and retreat according to the operation of the hydraulic cylinder.

5. In paragraph 4, The above connecting member A fastening part having a fastening hole formed so that a fastening member is assembled to be connected and fixed with the connecting members provided in the neighboring upper and lower currents; and A camber adjustment device for an assembly-type truss bridge, comprising: an insert formed to extend from the above-mentioned fastening member and slidably inserted into the above-mentioned hydraulic cylinder; 6. In paragraph 1, The above length adjustment means A joint part having a joint hole formed with a female screw thread on the inside and fixedly inserted into both ends of the upper and lower currents; and A camber adjustment device for an assembly-type truss bridge, comprising: a connecting member that is screw-connected with the female screw thread of the above-mentioned connecting hole so as to be able to advance and retreat according to the rotational direction; 7. In paragraph 6, The above connecting member A fastening part having a fastening hole formed so that a fastening member is assembled to be connected and fixed with the connecting members provided in the neighboring upper and lower currents; and A camber adjustment device for an assembly-type truss bridge, comprising: an insertion portion formed to extend from the above-mentioned fastening portion and having a male screw thread formed on an outer surface thereof to be screw-connected with the female screw thread; 8. In paragraph 1, The above length adjustment means An intermediate connecting portion inserted into both ends of the upper and lower current spur and having an inner wedge-shaped protrusion formed on both inner sides along the length direction; The connecting member having an outer wedge-shaped protrusion corresponding to the inner wedge-shaped protrusion and fixed at a predetermined position of the intermediate connecting portion; and A camber adjustment device for an assembly-type truss bridge, comprising: a fixing bolt penetrating the upper and lower chords and the intermediate connection portion to limit movement of the intermediate connection portion.

9. In paragraph 8, The above connecting member A fastening part having a fastening hole formed so that a fastening member is assembled to be connected and fixed with the connecting members provided in the neighboring upper and lower currents; and A camber adjustment device for an assembly-type truss bridge, comprising: an insertion portion formed to extend from the above-mentioned fastening portion and having an outer wedge-shaped protrusion formed on a surface facing the inner wedge-shaped protrusion and matching the inner wedge-shaped protrusion; 10. Truss panel consisting of upper chord, lower chord, vertical member and diagonal member; A connecting member provided at each end of the upper and lower currents to connect the upper and lower currents to the neighboring upper and lower currents; and A fastening member for connecting and fixing the connecting member of the above connecting member and the connecting member of the adjacent truss panel; The above connecting member is provided so that the length can be adjusted from each end of the upper and lower current by a length adjustment means, An assembly-type truss bridge in which each truss panel is assembled so that the total length of the upper chord including the length of the connecting member is longer than the total length of the lower chord including the length of the connecting member, thereby forming a camber.

11. In paragraph 10, The above length adjustment means A plurality of bolt holes formed at regular intervals along the longitudinal direction of the upper and lower chords; The connecting member is provided with a plurality of through holes corresponding to the plurality of bolt holes, and is provided so that a portion thereof is inserted inward from both ends of the upper and lower current spur; and An assembly-type truss bridge including a fixing bolt that controls the insertion length of the connecting member and restricts movement of the connecting member through the bolt hole and the through hole.

12. In paragraph 11, The above connecting member A fastening part having a fastening hole formed so that a fastening member is assembled to be connected and fixed with the connecting members provided in the neighboring upper and lower currents; and An assembly-type truss bridge including an insertion portion formed by extending from the above-mentioned fastening portion and having a plurality of through holes formed therein.

13. In paragraph 10, The above length adjustment means A hydraulic cylinder inserted and fixed at both ends of the upper and lower currents; and An assembly-type truss bridge including the connecting member that is configured to advance and retreat according to the operation of the hydraulic cylinder.

14. In paragraph 13, The above connecting member A fastening part having a fastening hole formed so that a fastening member is assembled to be connected and fixed with the connecting members provided in the neighboring upper and lower currents; and An assembly-type truss bridge including an insertion portion formed to extend from the above-mentioned fastening portion and slidably inserted into the hydraulic cylinder.

15. In paragraph 10, The above length adjustment means A joint part having a joint hole formed with a female screw thread on the inside and fixedly inserted into both ends of the upper and lower currents; and An assembly-type truss bridge including the connecting member, which is screw-connected with the female screw thread of the above-mentioned connecting hole and is provided so as to be able to advance and retreat according to the rotational direction.

16. In paragraph 14, The above connecting member A fastening part having a fastening hole formed so that a fastening member is assembled to be connected and fixed with the connecting members provided in the neighboring upper and lower currents; and An assembly-type truss bridge including an insertion portion formed to extend from the above-mentioned fastening portion and having a male screw thread formed on an outer surface thereof to be screw-connected with the female screw thread.

17. In paragraph 10, The above length adjustment means An intermediate connecting portion inserted into both ends of the upper and lower current spur and having an inner wedge-shaped protrusion formed on both inner sides along the length direction; The connecting member having an outer wedge-shaped protrusion corresponding to the inner wedge-shaped protrusion and fixed at a predetermined position of the intermediate connecting portion; and A prefabricated truss bridge including a fixing bolt penetrating the upper and lower chords and the intermediate connection to limit the movement of the intermediate connection.

18. In paragraph 17, The above connecting member A fastening part having a fastening hole formed so that a fastening member is assembled to be connected and fixed with the connecting members provided in the neighboring upper and lower currents; and An assembly-type truss bridge comprising an insertion portion formed to extend from the above-mentioned fastening portion and having an outer wedge-shaped protrusion formed on a surface opposite to the inner wedge-shaped protrusion and conforming to the inner wedge-shaped protrusion.

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