Height-variable truss panel and prefabricated truss bridge having same

Abstract

Disclosed are a height-variable truss panel and a prefabricated truss bridge having same. According to one aspect of the present invention, provided is a height-variable truss panel comprising: an upper member that has a certain length and includes lower connectors formed at regular intervals on a lower portion; a lower member that has a certain length and includes upper connectors formed at regular intervals on an upper portion; and a plurality of intermediate members which are provided between the upper member and the lower member and connected and fixed at both ends to the lower connectors of the upper member and the upper connectors of the lower member, wherein the intermediate members can be varied in length to adjust the distance between the upper member and the lower member.

Description

Variable-height truss panel and prefabricated truss bridge equipped with the same

[0001] The present invention relates to a height-variable truss panel and a prefabricated truss bridge having the same, and more particularly, to a height-variable truss panel capable of adjusting the height of each unit truss panel 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, conventional prefabricated truss bridges use truss panels of a fixed size, resulting in a fixed bridge height. For example, if upper and lower chords of the same diameter and length are used, the bending moment that can be withstood is determined by the truss panel's height. However, conventional bridges have a fixed height, limiting the maximum bending moment that can be withstood. This limits the length that can be erected. Furthermore, if the bridge is used within the maximum erection length, the load-carrying capacity remains, making it unusable in an over-designed state.

[0005] In addition, in the case of truss bridges, when providing camber to compensate for deflection due to self-weight, it must be manufactured precisely considering minute differences in specifications, so a lot of effort and care is required during manufacturing.

[0006] One aspect of the present invention is to provide a variable-height truss panel that can be used by adjusting the height in various ways and can easily provide camber, and an assembly-type truss bridge equipped with the same.

[0007] According to one aspect of the present invention, a variable-height truss panel may be provided, including: an upper chord having a predetermined length and lower connecting portions formed at predetermined intervals at the bottom; a lower chord having a predetermined length and upper connecting portions formed at predetermined intervals at the top; and a plurality of intermediate members provided between the upper chord and the lower chord and having both ends connected and fixed to the lower connecting portion of the upper chord and the upper connecting portion of the lower chord; wherein the intermediate members are provided such that their lengths are variable to adjust the distance between the upper chord and the lower chord.

[0008] The above intermediate material may include a saddle material arranged to have an incline between the upper and lower chords and a vertical material arranged vertically between the upper and lower chords.

[0009] The above intermediate member may include a first connecting rod having a predetermined length and a connecting hole having a female thread formed along the length direction therein; and a second connecting rod that is screw-connected to the connecting hole and formed to move away from or closer to the first connecting rod depending on the rotational direction.

[0010] At both ends of the above intermediate material, a connecting hole may be formed to be connected to the lower connecting portion and the upper connecting portion by a pin or bolt.

[0011] It includes connecting members provided at each end of the upper and lower currents to connect the upper and lower currents with neighboring upper and lower currents, and the connecting members can be provided so that their lengths can be adjusted from each end of the upper and lower currents by a length adjusting means.

[0012] According to another aspect of the present invention, there is provided a prefabricated truss bridge comprising a plurality of truss panels, each comprising an upper chord having lower connection portions formed at regular intervals at a lower portion, a lower chord having upper connection portions formed at regular intervals at an upper portion, and a plurality of intermediate members provided between the upper and lower chords and having both ends connected and fixed to the lower connection portion of the upper chord and the upper connection portion of the lower chord; connecting members provided at each end of the upper and lower chords to connect the upper and lower chords to the upper and lower chords of neighboring truss panels; and a fastening member connecting and fixing the connecting members of the neighboring truss panels to the connecting members; wherein the intermediate members are provided to have a length that can be varied so as to adjust the distance between the upper and lower chords.

[0013] Depending on the length of the above-mentioned prefabricated truss bridge, the intermediate material diameter of the truss panel provided on the end side may be provided to have a larger diameter than the intermediate material diameter of the truss panel provided on the central part.

[0014] The above truss panel may be arranged so that the height thereof is adjusted depending on the position in which it is placed when assembled with the adjacent truss panel.

[0015] The above intermediate material may include a saddle material arranged to have an incline between the upper and lower chords; and a vertical material arranged vertically between the upper and lower chords.

[0016] The above intermediate member may include a first connecting rod having a predetermined length and a connecting hole having a female thread formed along the length direction therein; and a second connecting rod that is screw-connected to the connecting hole and formed to move away from or closer to the first connecting rod depending on the rotational direction.

[0017] At both ends of the above intermediate material, a connecting member may be provided with a fastening hole formed to be connected to the lower connecting part and the upper connecting part by a pin or bolt.

[0018] The above connecting member is provided so that the lengths of the upper and lower chords can be adjusted from both ends by a length adjusting means, and 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, so that a camber can be formed.

[0019] A variable height truss panel according to one embodiment of the present invention and a prefabricated truss bridge having the same can adjust the length of an intermediate member (a diagonal member and a vertical member) installed between an upper chord and a lower chord, so that truss panels of various heights can be easily constructed.

[0020] In addition, by providing a length-adjustable connecting member that connects the upper and lower chords to the adjacent upper and lower chords, the length of the upper chord can be made longer than that of the lower chord, thereby forming a camber in which the truss bridge is raised upward.

[0021] Accordingly, the size of the truss panel corresponding to the required bending moment can be applied, so that the bridge can be efficiently constructed to prevent waste of members, and it has the effect of providing a desired level of camber.

[0022] FIG. 1 is a drawing showing a variable-height truss panel according to one embodiment of the present invention.

[0023] FIG. 2 is a drawing showing an intermediate member provided in a variable-height truss panel according to one embodiment of the present invention.

[0024] FIG. 3 is a drawing showing a prefabricated truss bridge manufactured using a variable-height truss panel according to one embodiment of the present invention.

[0025] FIG. 4 is a plan view and a normal cross-sectional view for explaining a state in which a connecting member provided in a variable-height truss panel according to one embodiment of the present invention is installed to the upper and lower chords by a length adjusting means.

[0026] Fig. 5 is 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.

[0027] Fig. 6 is a drawing showing a state in which adjacent variable-height truss panels are connected through the length-adjustable connecting member of Fig. 4.

[0028] FIG. 7 is a cross-sectional view illustrating another embodiment of a length adjusting means provided in a variable-height truss panel according to one embodiment of the present invention.

[0029] FIG. 8 is a cross-sectional view illustrating another embodiment of a length adjusting means provided in a variable-height truss panel according to one embodiment of the present invention.

[0030] FIG. 9 is a cross-sectional view illustrating another embodiment of a length adjusting means provided in a variable-height truss panel according to one embodiment of the present invention.

[0031] Fig. 10 is a partial cutaway perspective view showing a length adjustment means provided in the height variable truss panel of Fig. 9.

[0032] FIG. 11 is a drawing showing an assembly-type truss bridge in which the height is adjusted and camber is provided by a height-adjustable truss panel and a length-adjusting means according to one embodiment of the present invention.

[0033] 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.

[0034] FIG. 1 is a drawing showing a height-variable truss panel according to one embodiment of the present invention, FIG. 2 is a drawing showing an intermediate member provided in a height-variable truss panel according to one embodiment of the present invention, and FIG. 3 is a drawing showing a prefabricated truss bridge manufactured using a height-variable truss panel according to one embodiment of the present invention.

[0035] Referring to FIGS. 1 to 3, a height-variable truss panel (100) according to one aspect of the present invention may include an upper chord (110), a lower chord (120), and a plurality of intermediate members (130) provided between the upper chord (110) and the lower chord (120). Such a height-variable truss panel (100) may be provided as a single unit and assembled continuously with neighboring truss panels (100), thereby producing an assembly-type truss bridge (1).

[0036] The upper current (110) has a predetermined length and a lower connecting portion (115) may be formed at the bottom. A connecting hole (115a) is formed in the lower connecting portion (115) so as to be connected to an intermediate member (130) to be described later by a pin or bolt. The lower connecting portions (115) may be provided at predetermined intervals along the longitudinal direction of the upper current (110). As illustrated, the lower connecting portions (115) may be provided at the center and lower sides of both ends of the upper current (110). However, the number and location of the lower connecting portions (115) are not limited thereto.

[0037] The lower chord (120) has a predetermined length and an upper connecting portion (125) may be formed at the upper portion. The lower chord (120) is arranged to be spaced apart from the upper chord (110). A connecting hole (125a) is formed in the upper connecting portion (125) to be connected to an intermediate member (130) to be described later by a pin or bolt. The upper connecting portions (125) may be provided at predetermined intervals along the longitudinal direction of the lower chord (120). As illustrated, the upper connecting portions (125) may be provided at the center and lower sides of both ends of the lower chord (120). However, the number and positions of the upper connecting portions (125) are not limited thereto. The lower connecting member (115) and the upper connecting member (125) have the same configuration.

[0038] In addition, the upper chord (110) and the lower chord (120) may be provided to have the same length. The upper chord (110) and the lower chord (120) may be provided to have a pipe shape in which a hollow portion (110a, 120a) is formed along the longitudinal direction therein. The upper chord (110) and the lower chord (120) may be provided to have various cross-sections such as a circle, a square, and a polygon. At this time, the hollow portion (110a, 120a) is a portion where a connecting member (200) is installed through a length adjusting means to be described later, and a connecting member (200) may be provided at each end of the upper chord (110) and the lower chord (120). Each connecting member (200) is provided so that its length can be adjusted by the length adjusting means. For example, the length adjustment of the connecting member (200) through the length adjustment means may be achieved through a bolt-fastening structure of a bolt hole, a sliding structure based on hydraulic operation, a screw-joint structure, or a wedge-shaped connecting portion. Structures in which the length of the connecting member is adjusted through such length adjustment means will be described again below.

[0039] An intermediate member (130) may be provided between the upper chord (110) and the lower chord (120) so that both ends are connected to the upper chord (110) and the lower chord (120), respectively. The intermediate member (130) may include a slant member (130a) arranged to have an incline between the upper chord (110) and the lower chord (120), and a vertical member (130b) arranged vertically between the upper chord (110) and the lower chord (120).

[0040] A connecting hole (135) may be provided at each end of the member (130a) and the vertical member (130b). At this time, a connecting hole (135a) may be formed in the connecting hole (135) so as to be connected to the lower connecting part (115) and the upper connecting part (125) by a pin or a bolt. That is, one end of the intermediate member (130) may be connected to the lower connecting part (115), and the other end may be connected to and fixed to the upper connecting part (125). Here, the plurality of members (130a) may be arranged to have an incline, so that one end may be connected to one of the plurality of lower connecting parts (115), and the other end may be connected to one of the plurality of upper connecting parts (125).

[0041] Meanwhile, the vertical member (130b) may be vertically arranged between the upper chord (110) and the lower chord (120) and may be connected to the lower connection portion (115) and the upper connection portion (125) facing each other. In addition, the vertical member (130b) may be connected to the connection members (200) provided at both ends of the upper chord (110) and the lower chord (120). That is, the vertical member (130b) may be selectively connected to the upper and lower connection portions (115, 125) or to the connection members (200) provided at both ends of the upper and lower chords (110, 120).

[0042] These materials (130a) and vertical materials (130b) are placed between the upper current (110) and the lower current (120) to withstand shear force. In addition, the intermediate material (130) may be provided to have various cross-section shapes such as circular, square, and polygonal.

[0043] Moreover, the intermediate member (130) may be provided with a variable length to adjust the distance between the upper current (110) and the lower current (120). More specifically, the intermediate member (130) may be provided with a first connecting rod (131) and a second connecting rod (132) that is connected to the first connecting rod (131) in a length-adjustable manner.

[0044] The first connecting rod (131) has a predetermined length, and a connecting hole (135) may be provided at one end and a connecting hole (131a) may be formed at the other end. The connecting hole (131a) may have a female screw thread (131b) formed inside along the length direction.

[0045] The second connecting rod (132) has a predetermined length, has a connecting hole (135) provided at the other end, and can have a rod (132a) formed to extend and be screw-connected to a connecting hole (131a) at one end. A male thread (132b) that is screw-connected to a female thread (131b) can be formed on the outer surface of the rod (132a). Accordingly, the rod (132a) is screw-connected to the female thread (131b) and is provided to be able to advance and retreat inwardly of the first connecting rod (131).

[0046] The length of the intermediate member (130) can be adjusted according to the rotational direction of the first connecting rod (131) and the second connecting rod (132). Accordingly, various variable-height truss panels (100) can be manufactured, such as the low-height truss panel (100) illustrated in (a) of FIG. 1, the high-height truss panel (100) illustrated in (b) of FIG. 1, and the truss panel (100) having an inclined height illustrated in (c) of FIG. 1.

[0047] Meanwhile, the intermediate member (130) performs the role of withstanding the shear force against the load generated in the prefabricated truss bridge (1), and the upper chord (110) and the lower chord (120) perform the role of withstanding the bending moment against the load. Accordingly, due to the property that the shear force increases from the center of the prefabricated truss bridge (1) to both sides, it is preferable that the intermediate members (130) located near both sides of the prefabricated truss bridge (1) have a larger diameter than the intermediate members (130) located in the center.

[0048] In addition, due to the property that a larger bending moment occurs near the center of the prefabricated truss bridge (1) compared to both sides, it is preferable that the height-variable truss panel (100) located near the center of the prefabricated truss bridge (1) has a higher height than the height-variable truss panels (100) located on both sides.

[0049] By manufacturing a prefabricated truss bridge (1) by selectively changing the diameter of the intermediate material (130) and adjusting the height, waste of materials can be reduced compared to a truss bridge manufactured using truss panels having the same structure, and an efficient bridge can be constructed.

[0050] FIG. 4 is a plan view and a normal cross-sectional view for explaining a state in which a connecting member provided in a height-variable truss panel according to one embodiment of the present invention is installed to an upper chord and a lower chord by a length adjustment means, FIG. 5 is a plan view and a normal cross-sectional view showing a state in which the length of the connecting member is adjusted by the length adjustment means of FIG. 4, and FIG. 6 is a drawing showing a state in which adjacent height-variable truss panels are connected by the length-adjustable connecting member of FIG. 4.

[0051] Referring to FIGS. 4 to 6, length-adjustable connecting members (200) are provided at both ends of the upper chord (110) and the lower chord (120) of the variable-height truss panel (100). The connecting members (200) are length-adjustable and serve to connect the upper chord (110) and the lower chord (120) with the neighboring upper chord (110) and the lower chord (120). That is, the connecting members (200) can be provided at both ends of the upper chord (110) and the lower chord (120) of the truss panel (100) as a single unit. Accordingly, an assembled truss bridge (1) can be manufactured by continuously assembling the neighboring truss panel (100) through the connecting members (200).

[0052] The length adjustment means according to the present embodiment may include a bolt hole (210) formed in the upper current (110) and the lower current (120), a through hole (202a) formed in the connecting member (200), and a fixing bolt (212) inserted and fixed into the bolt hole (210) and the through hole (202a).

[0053] Bolt holes (210) may be formed at regular intervals along the longitudinal direction of the upper chord (110) and the lower chord (120). For example, a plurality of bolt holes (210) are formed in a direction toward the center based on both ends of the upper chord (110) and the lower chord (120). The bolt holes (210) may be formed penetrating from the front to the rear of the upper chord (110) and the lower chord (120), but are not limited thereto, and may be formed in a vertical direction.

[0054] The connecting member (200) may be provided so that a portion thereof is inserted from both ends of the upper current (110) and the lower current (120). That is, the connecting member (200) may be inserted through the hollow portions (110a, 120a) of the upper current (110) and the lower current (120). This connecting member (200) may include a fastening portion (201) connected to an adjacent connecting member (200), and an insertion portion (202) inserted into the hollow portions (110a, 120a).

[0055] The fastening portion (201) located at one end of the upper current (110) and the lower current (120) is connected to the fastening portion (201) of the connecting member (200) located at the other end of the neighboring upper current (110) and the lower current (120). A fastening hole (201a) into which a fastening member (203) is assembled is formed at the center of this fastening portion (201). Accordingly, when the neighboring fastening portions (201) overlap each other, the fastening holes (201a) are provided so that they are located at the same position. In this state, when the fastening member (203) is inserted into the fastening hole (201a), the neighboring fastening portions (201) can be connected and fixed to each other. At this time, the fastening member (203) may be composed of a pin or a bolt and nut that are inserted into the fastening hole (201a) and fixed.

[0056] The insertion portion (202) may be formed to extend from the fastening portion (201) and be inserted into the hollow portions (110a, 120a) of the upper current (110) and lower current (120). A plurality of through holes (202a) may be formed in the insertion portion (202) to have a spacing corresponding to a plurality of bolt holes (210).

[0057] The fixing bolt (212) is provided to limit the movement of the connecting member (200) through the bolt hole (210) and the through hole (202a). That is, the fixing bolt (212) can be fastened to the bolt hole (210) and the through hole (202a) while adjusting the insertion length of the connecting member (200) so that the bolt hole (210) and the through hole (202a) are aligned. Accordingly, the connecting member (200) can be fixed by adjusting the length in the longitudinal direction of the upper chord (110) and the lower chord (120), and can be connected to the neighboring connecting member (200). At this time, at least one fixing bolt (212) may be provided and provided to be fastened to the bolt hole (210) and the through hole (202a).

[0058] Meanwhile, the fastening portion (201) provided on one side of the upper current (110) and the lower current (120) is provided as a pair of fastening pieces spaced apart from each other, and the fastening portion (201) 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 (110) and the lower current (120) are not twisted and the adjacent fastening portion (201) is fastened by the fastening member (203), the formation position of the fastening portion (201) may be changed or may have any shape.

[0059] A length adjustment means according to another embodiment of the present invention will be described with reference to FIG. 7.

[0060] FIG. 7 is a cross-sectional view illustrating another embodiment of a length adjusting means provided in a variable-height truss panel according to one embodiment of the present invention.

[0061] Referring to Fig. 7, the length adjustment means according to the present embodiment may be provided to adjust the length of the connecting member (200) according to the operation of hydraulic pressure. Accordingly, the length adjustment means may include a hydraulic cylinder (220) inserted and fixed to both ends of the upper current (110) and the lower current (120), and a connecting member (200) provided to be able to advance and retreat according to the operation of the hydraulic cylinder (220).

[0062] The hydraulic cylinder (220) may be provided in a form in which one side is open and may be inserted and fixed to both ends of the upper chord (110) and the lower chord (120), respectively. That is, it may be installed so that the open portion is exposed to both ends of the upper chord (110) and the lower chord (120). At this time, the hydraulic cylinder (220) may be fixed to the upper chord (110) and the lower chord (120) by welding, bolts, etc. The hydraulic cylinder (220) may be provided as a typical hydraulic cylinder that is operated by receiving hydraulic pressure. Accordingly, the connecting member (200) inserted through the open portion of the hydraulic cylinder (220) may be provided so as to be able to advance and retreat according to the operation of the hydraulic cylinder (220).

[0063] The connecting member (200) may be configured such that a portion thereof is inserted inward from an open side of the hydraulic cylinder (220). The connecting member (200) may include a fastening portion (201) connected to an adjacent connecting member (200) and an insertion portion (202) inserted into the hydraulic cylinder (220).

[0064] Here, the fastening portion (201) is provided with the same structure as the fastening portion (201) of the previous embodiment. That is, it can be connected and fixed through the adjacent fastening portion (201) and the fastening member (203). Therefore, a detailed description of the fastening portion (201) in this embodiment will be omitted.

[0065] The insertion portion (202) can be inserted into a hydraulic cylinder (220) and can be arranged to advance and retreat according to the operation of the hydraulic cylinder (220). That is, when the hydraulic cylinder (220) is operated and the insertion portion (202) is advanced toward the adjacent connecting member (200), and the adjacent connecting portions (201) are connected and fixed to each other through the connecting member (203), the connecting portions (201) are maintained in a connected and fixed state.

[0066] A length adjustment means according to another embodiment of the present invention will be described with reference to FIG. 8.

[0067] FIG. 8 is a cross-sectional view illustrating another embodiment of a length adjusting means provided in a variable-height truss panel according to one embodiment of the present invention.

[0068] Referring to Fig. 8, the length adjustment means according to the present embodiment may be provided to adjust the length of the connecting member (200) according to a screw-joining structure. Accordingly, the length adjustment means may include a connecting part (230) that is inserted and fixed to both ends of the upper current (110) and the lower current (120), and a connecting member (200) that is screw-joined to the connecting part (230).

[0069] The coupling part (230) can be inserted and fixed to each end of the upper current (110) and the lower current (120). At this time, the coupling part (230) can be fixed to the upper current (110) and the lower current (120) by welding, bolts, etc. A coupling hole (231) having a female screw thread (232) formed on the inside is provided in the coupling part (230). At this time, the female screw threads (232) of the coupling hole (231) provided on one side and the other side of the upper current (110) and the lower current (120) can be formed in opposite directions.

[0070] The connecting member (200) may be screw-connected with the female screw thread (232) of the connecting hole (231) so as to be able to advance and retreat in the rotational direction. This connecting member (200) may include a fastening portion (201) connected to an adjacent connecting member (200) and an insertion portion (202) inserted into the connecting hole (231).

[0071] Here, the fastening portion (201) is provided with the same structure as the fastening portion (201) of the previous embodiment. That is, it can be connected and fixed through the adjacent fastening portion (201) and the fastening member (203). Therefore, a detailed description of the fastening portion (201) in this embodiment will be omitted.

[0072] The insertion portion (202) is formed to extend from the fastening portion (201) and may have a male screw thread (202b) formed on the outer surface. Accordingly, the insertion portion (202) is screw-connected with the female screw thread (232) and inserted into the connecting portion (230). That is, the connecting member (200) moves forward and backward from the connecting portion (230) depending on the rotational direction of the connecting member (200).

[0073] Meanwhile, since the female screw threads (232) formed in the coupling holes (231) of the facing coupling portions (230) are formed in opposite directions, the connecting members (200) screw-connected to the respective coupling holes (231) move in the same direction when rotated in opposite directions. For example, when the connecting members (200) located on one side of the upper chord (11) and the lower chord (12) are rotated clockwise, they move outward, and when the connecting members (200) located on the other side of the upper chord (110) and the lower chord (120) are rotated counterclockwise, they move outward. Accordingly, it can be arranged to adjust the length by rotating the connected connecting members (200) after connecting and fixing the adjacent connecting members (200) to each other.

[0074] A length adjustment means according to another embodiment of the present invention will be described with reference to FIGS. 9 and 10.

[0075] FIG. 9 is a cross-sectional view illustrating another embodiment of a length adjusting means provided in a height-variable truss panel according to one embodiment of the present invention, and FIG. 10 is a partial cut-away perspective view showing a length adjusting means provided in the height-variable truss panel of FIG. 9.

[0076] Referring to FIGS. 9 and 10, the length adjustment means according to the present embodiment may be provided to adjust the length of the connecting member (200) by a wedge-shaped connecting member. Accordingly, the length adjustment means may include an intermediate connecting member (240) inserted into both ends of the upper current (110) and the lower current (120), and a connecting member (200) inserted and fixed into the intermediate connecting member (240) and a fixing bolt (244) restricting the movement of the intermediate connecting member (240).

[0077] The intermediate connecting portion (240) can be inserted into each of the ends of the upper current (110) and the lower current (120). The intermediate connecting portion (240) can have inner wedge-shaped protrusions (242) formed on both inner surfaces along the longitudinal direction. That is, the inner wedge-shaped protrusions (242) can be formed to face each other.

[0078] The connecting member (200) has an outer wedge-shaped protrusion (202c) corresponding to an inner wedge-shaped protrusion (242) and can be optionally fixed to a certain position of the intermediate connecting member (240). This connecting member (200) can include a fastening member (201) connected to an adjacent connecting member (200) and an insertion member (202) inserted into the intermediate connecting member (240).

[0079] Here, the fastening portion (201) is provided with the same structure as the fastening portion (201) of the previous embodiment. That is, it can be connected and fixed through the adjacent fastening portion (201) and the fastening member (203). Therefore, a detailed description of the fastening portion (201) in this embodiment will be omitted.

[0080] The insertion portion (202) may be formed to extend from the fastening portion (201) and may have an outer wedge-shaped protrusion (202c) formed on the outer surface. That is, an outer wedge-shaped protrusion (202a) that matches the inner wedge-shaped protrusion (242) may be formed on the outer surface of the insertion portion (202) to face the inner wedge-shaped protrusion (242). Accordingly, the connection member (200) may be moved forward and backward in the direction of the neighboring connection member (200) and the movement may be fixed through the intermediate connection member (240) while the length is adjusted, and after the length is adjusted, the intermediate connection member (240) may be fixed by the fixing bolt (244).

[0081] The fixed bolt (244) may be provided to penetrate the upper chord (110), the lower chord (120) and the intermediate connection portion (240) to restrict the movement of the intermediate connection portion (240). Although not shown, bolt holes may be formed in the intermediate connection portion (240), the upper chord (110) and the lower chord (120) to insert and fix the fixed bolt (244). In addition, these bolt holes (not shown) may be formed at regular intervals along the length direction of the intermediate connection portion (240), and thus bolt holes may be formed in the upper chord (110) and the lower chord (120) at intervals corresponding to the bolt holes.

[0082] The length of the connecting member (200) can be adjusted through the length adjustment means according to various embodiments as described above. That is, by adjusting the length of the connecting members (200) provided at each end of the upper chord (110) and the lower chord (120) to connect and fix the neighboring truss panels (100), a cambered assembly truss bridge (1) can be manufactured. In order to provide such a camber, the length of the connecting member (200) must be adjusted so that the total length of the upper chord (110) including the length of the connecting member (200) (see 'L1' in FIG. 6) is formed longer (L1 > L2) than the total length of the lower chord (120) including the length of the connecting member (200) (see 'L2' in FIG. 6). By assembling neighboring truss panels (100) through the length-adjusted connecting member (200) in this way, it is possible to manufacture an assembly-type truss bridge (1) with a camber as shown in Fig. 11.

[0083] Referring to Fig. 11, the prefabricated truss bridge (1) can be provided with camber not only by adjusting the length of the connecting member (200), but also by adjusting the height of each unit truss panel (100) according to the length adjustment of the intermediate member (130). That is, as the length of the connecting member (200) is adjusted, the camber can be easily adjusted by selectively adjusting the length of the connecting member (200) according to the overall length of the bridge. In addition, by manufacturing the prefabricated truss bridge (1) by selectively changing the height adjustment and the diameter of the intermediate member (130), waste of components can be reduced compared to existing truss bridges manufactured using truss panels having the same structure, and an efficient bridge can be constructed.

[0084] 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 top current having a predetermined length and having lower connecting parts formed at regular intervals at the bottom; A lower current having a predetermined length and having upper connecting parts formed at predetermined intervals on the upper portion; and It includes a plurality of intermediate members, which are provided between the upper and lower currents and have both ends connected and fixed to the lower connection part of the upper current and the upper connection part of the lower current; The above intermediate member is a variable-height truss panel whose length is variable to adjust the distance between the upper and lower chords.

2. In paragraph 1, The above intermediate goods are A variable height truss panel including a member arranged to have an incline between the upper chord and the lower chord and a vertical member arranged vertically between the upper chord and the lower chord.

3. In paragraph 1, The above intermediate goods are A first connecting rod having a predetermined length and a connecting hole having a female thread formed along the length direction therein; and A variable-height truss panel having a second connecting rod that is screw-connected to the above-mentioned joint and formed to move away from or closer to the first connecting rod depending on the direction of rotation.

4. In paragraph 1, A variable-height truss panel having a connecting hole formed at each end of the intermediate member to be connected to the lower connecting portion and the upper connecting portion by a pin or bolt.

5. In paragraph 1, 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, The above connecting member is a height-variable truss panel provided so that the length can be adjusted from each end of the upper and lower chords by a length-adjusting means.

6. A truss panel including an upper chord having lower connecting portions formed at regular intervals at the lower portion, a lower chord having upper connecting portions formed at regular intervals at the upper portion, and a plurality of intermediate members provided between the upper chord and the lower chord and having both ends connected and fixed to the lower connecting portion of the upper chord and the upper connecting portion of the lower chord; Connecting members provided at each end of the upper and lower chords to connect the upper and lower chords to the upper and lower chords of the neighboring truss panels; and A fastening member for connecting and fixing the connecting member of the truss panel adjacent to the connecting member; An assembly-type truss bridge in which the above intermediate member is provided with a variable length to adjust the distance between the upper and lower chords.

7. In paragraph 6, An assembly-type truss bridge, wherein the intermediate material diameter of the truss panel provided at the end portion according to the length of the assembly-type truss bridge is provided to have a larger diameter than the intermediate material diameter of the truss panel provided at the center portion.

8. In paragraph 6, The above truss panel is an assembly-type truss bridge in which the girth is adjusted according to the position in which it is placed when assembled with the neighboring truss panel.

9. In paragraph 6, The above intermediate goods are A material arranged to have an incline between the upper and lower chords; and A prefabricated truss bridge including a vertical member vertically arranged between the upper and lower chords.

10. In paragraph 6, The above intermediate goods are A first connecting rod having a predetermined length and a connecting hole having a female thread formed along the length direction therein; and An assembly-type truss bridge comprising a second connecting rod that is screw-connected to the above-mentioned connecting hole and formed to move away from or closer to the first connecting rod depending on the direction of rotation.

11. In paragraph 6, An assembly-type truss bridge in which a connecting hole is formed at each end of the above intermediate member to be connected to the lower connecting portion and the upper connecting portion by a pin or bolt.

12. In paragraph 6, 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.

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