Arch adjustment device for precast truss bridge and precast truss bridge with arch adjustment device

Abstract

A camber adjustment device for a precast truss bridge and a precast truss bridge having the camber adjustment device are disclosed. According to one aspect of this disclosure, a camber adjustment device for a precast truss bridge can be provided, the precast truss bridge being formed by assembling truss panels consisting of upper chord members, lower chord members, vertical members, and diagonal members in one direction. The camber adjustment device includes connecting members disposed at both ends of the upper chord members and the lower chord members to connect the upper chord members and the lower chord members to adjacent upper chord members and the lower chord members, wherein the connecting members are configured to be length-adjustable from both ends of the upper chord members and the lower chord members by means of a length adjustment device.

Description

Technical Field

[0001] This disclosure relates to a camber adjustment device for a precast truss bridge and a precast truss bridge having a camber adjustment device, and more specifically, to a camber adjustment device for a precast truss bridge capable of adjusting the camber to a desired level to compensate for deflection caused by load, and a precast truss bridge having a camber adjustment device. Background Technology

[0002] Typically, a truss structure is a frame structure that connects joints with pins, preventing the members from bending, and often uses arched, suspended, and beam types. This type of truss structure is widely used as a lightweight building / civil engineering component that can withstand large loads.

[0003] This type of truss structure is commonly used as a truss bridge. Precast truss bridges—a type of such truss bridge—are used as truss bridges by continuously connecting truss panels, which are units, according to their length. More specifically, the truss panels consist of upper chord members and lower chord members, as well as multiple vertical and diagonal members for connecting the upper and lower chord members. One end of each vertical and diagonal member is fixedly connected to the upper and lower chord members by welding. Additionally, connecting fittings are provided at both ends of the upper and lower chord members to connect adjacent upper and lower chord members by pins.

[0004] However, existing precast truss bridges, assembled in a straight line with the upper and lower chord members set to the same length, suffer from deflection due to their own weight and superimposed loads. When this deflection occurs, the driver's field of vision is oriented towards the ground upon entering the bridge, causing anxiety and degrading vehicle drivability. Therefore, a camber is typically introduced during the manufacturing of precast truss bridges to compensate for this, causing the initial shape to soar upwards. However, in existing precast truss bridges, camber is not considered at all during construction. Summary of the Invention

[0005] Technical issues

[0006] One aspect of this disclosure is to provide a camber adjustment device for a prefabricated truss bridge and a prefabricated truss bridge having the camber adjustment device, which is capable of introducing camber into the prefabricated truss bridge and adjusting the camber according to the location and length of the bridge to be installed.

[0007] Technical solutions

[0008] According to one aspect of this disclosure, an arch adjustment device for a prefabricated truss bridge is provided. The prefabricated truss bridge is formed by assembling truss panels consisting of upper chord members, lower chord members, vertical members, and diagonal members in one direction. The arch adjustment device includes: connecting members disposed at both ends of the upper chord members and the lower chord members to connect the upper chord members and the lower chord members to adjacent upper chord members and the lower chord members, wherein the connecting members are configured to be length-adjustable from both ends of the upper chord members and the lower chord members by means of length adjustment devices.

[0009] According to another aspect of this disclosure, a prefabricated truss bridge is provided, comprising: truss panels composed of upper chord members, lower chord members, vertical members, and diagonal members; connecting members disposed at both ends of the upper chord members and the lower chord members, and configured to connect the upper chord members and the lower chord members to adjacent upper chord members and the lower chord members; and fastening members for connecting and fixing the connecting members to the connecting members of adjacent truss panels, wherein the connecting members are configured to be length-adjustable from both ends of the upper chord members and the lower chord members by means of length adjustment devices, and each truss panel is assembled such that the total length of the upper chord members including the length of the connecting members is longer than the total length of the lower chord members including the length of the connecting members, thereby forming an camber.

[0010] The length adjustment device may include: a plurality of bolt holes formed at regular intervals along the length direction of the upper chord member and the lower chord member; a connecting member having a plurality of through holes corresponding to the plurality of bolt holes, and the connecting member being configured such that a portion thereof is inserted inward from both ends of the upper chord member and the lower chord member; and a fixing bolt for adjusting the insertion length of the connecting member to restrict the movement of the connecting member through the bolt holes and the through holes.

[0011] The connecting member may include: a fastening portion having a fastening hole formed therein for assembling the fastening member therein, so as to connect and fix to the connecting member provided in adjacent upper chord member and lower chord member; and an insertion portion extending from the fastening portion and having a plurality of through holes formed therein.

[0012] In embodiments of this disclosure, the length adjustment device may include: a hydraulic cylinder inserted into and fixed to both ends of the upper chord member and the lower chord member; and a connecting member configured to advance and retract in response to the operation of the hydraulic cylinder.

[0013] The connecting member may include: a fastening portion having a fastening hole formed therein for assembling the fastening member therein, so as to connect and fix to the connecting member provided in adjacent upper chord members and lower chord members; and an insertion portion extending from the fastening portion and inserted into and mounted in a hydraulic cylinder so as to be able to slide.

[0014] In another embodiment of this disclosure, the length adjustment device may include: a connecting portion inserted into and fixed to both ends of an upper chord member and a lower chord member, and having a connecting hole in which an internal thread is formed; and a connecting member threadedly connected to the internal thread of the connecting hole and configured to advance and retract according to the direction of rotation.

[0015] The connecting member may include: a fastening portion having a fastening hole formed therein for assembling the fastening member therein, so as to connect and fix to a connecting member provided in adjacent upper chord members and lower chord members; and an insertion portion extending from the fastening portion and having an external thread formed on its outer circumferential surface, the external thread being threaded to the internal thread.

[0016] In another embodiment of this disclosure, the length adjusting device may include: an intermediate connecting portion inserted into both ends of an upper chord member and a lower chord member, and having an inner wedge-shaped concave-convex portion formed on two inner surfaces along the length direction; a connecting member having an outer wedge-shaped concave-convex portion corresponding to the inner wedge-shaped concave-convex portion, and the connecting member being fixed at a predetermined position of the intermediate connecting portion; and a fixing bolt penetrating the upper chord member, the lower chord member, and the intermediate connecting portion to restrict movement of the intermediate connecting portion.

[0017] The connecting member may include: a fastening portion having a fastening hole formed therein for assembling the fastening member therein, so as to connect and fix to the connecting member provided in adjacent upper chord members and lower chord members; and an insertion portion extending from the fastening portion and having an outer wedge-shaped concave-convex portion formed on a surface facing the inner wedge-shaped concave-convex portion, the outer wedge-shaped concave-convex portion engaging with the inner wedge-shaped concave-convex portion.

[0018] Beneficial effects

[0019] According to embodiments of the present disclosure, a camber adjustment device for a prefabricated truss bridge and a prefabricated truss bridge having a camber adjustment device provide a connecting member that connects an upper chord member and a lower chord member to adjacent upper chord members and lower chord members, respectively, so as to allow for length adjustment, thereby forming an upper chord member with a longer length than a lower chord member, allowing the truss bridge to be formed with an upwardly bulging camber. Therefore, deflection caused by self-weight and superimposed loads can be compensated, driver anxiety caused by the deflection of existing bridges can be alleviated, and drivability can be improved.

[0020] In addition, it has the effect of adjusting the required arch according to the length of the bridge by means of the connecting members, which can be easily adjusted. Attached Figure Description

[0021] Figure 1 This is a view showing a truss panel equipped with an arch adjustment device according to an embodiment of the present disclosure.

[0022] Figure 2 This is a view showing the state of connection of a truss panel equipped with an arch adjustment device according to an embodiment of the present disclosure.

[0023] Figure 3 This is a view showing a prefabricated truss bridge that is given an arch by an arch adjustment device according to an embodiment of the present disclosure.

[0024] Figure 4 This is a cross-sectional plan view and a front cross-sectional view of the length adjusting device of the camber adjusting apparatus according to an embodiment of the present disclosure.

[0025] Figure 5 This is a view showing a cross-sectional plan view and a front view of the cross-section, which show the cross-sectional plan view through the front view of the cross-section. Figure 4 The length adjustment device adjusts the length of the connecting component.

[0026] Figure 6 This is a cross-sectional plan view and a cross-sectional front view showing another embodiment of the length adjusting device provided in the camber adjusting device according to an embodiment of the present disclosure.

[0027] Figure 7 This is a view showing a cross-sectional plan view and a front view of the cross-section, which show the cross-sectional plan view through the front view of the cross-section. Figure 6 The length adjustment device adjusts the length of the connecting component.

[0028] Figure 8This is a cross-sectional plan view and a cross-sectional front view showing another embodiment of the length adjusting device provided in the camber adjusting device according to an embodiment of the present disclosure.

[0029] Figure 9 This is a view showing a cross-sectional plan view and a front view of the cross-section, which show the cross-sectional plan view through the front view of the cross-section. Figure 8 The length adjustment device adjusts the length of the connecting component.

[0030] Figure 10 This is a cross-sectional plan view and a cross-sectional front view showing another embodiment of the length adjusting device provided in the camber adjusting device according to an embodiment of the present disclosure.

[0031] Figure 11 This is a view showing a cross-sectional plan view and a front view of the cross-section, which show the cross-sectional plan view through the front view of the cross-section. Figure 10 The length adjustment device adjusts the length of the connecting component.

[0032] Figure 12 It shows the setting Figure 10 A partial sectional perspective view of the length adjustment device in the arch adjustment device. Detailed Implementation

[0033] In the following, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. These embodiments are presented to fully convey the spirit of the present disclosure to those skilled in the art. The present disclosure is not limited to the embodiments presented herein and may be implemented in other forms. The drawings may omit illustrations of parts unrelated to the description in order to clarify the present disclosure, and may exaggerate the dimensions of components to aid understanding.

[0034] Figure 1 This is a view showing a truss panel equipped with an arch adjustment device according to an embodiment of the present disclosure. Figure 2 This is a view showing the state in which a truss panel equipped with an camber adjustment device according to an embodiment of the present disclosure is connected, and Figure 3 This is a view showing a prefabricated truss bridge that is given an arch by an arch adjustment device according to an embodiment of the present disclosure.

[0035] Reference Figures 1 to 3According to one aspect of this disclosure, the camber adjustment device for a prefabricated truss bridge 1 may include a connecting member 100 whose length can be adjusted by a length adjustment device. The connecting member 100 is length-adjusted and serves to connect the upper chord member 11 and the lower chord member 12 to adjacent upper chord members 11 and lower chord members 12. Specifically, the connecting member 100 may be respectively disposed at both ends of the upper chord member 11 and the lower chord member 12 of a truss panel 10 as a unit. Therefore, when the truss panels are continuously assembled with adjacent truss panels 10 via the connecting member 100, an assembled truss bridge 1 can be manufactured.

[0036] Meanwhile, the truss panel 10 can be composed of an upper chord member 11, a lower chord member 12, diagonal members 13, and vertical members 14. The upper chord member 11 and the lower chord member 12 can have predetermined lengths and can be configured to have the same length as each other. Furthermore, the upper chord member 11 and the lower chord member 12 can be configured to have a pipe shape in which hollow portions 11a and 12a are formed along their length. In this case, the hollow portions 11a and 12a can be formed only in the portions through which the connecting member 100 is inserted to pass through the length adjustment device described later. The upper chord member 11 and the lower chord member 12 can be configured such that their cross-sections have various shapes such as circles, squares, and polygons.

[0037] The upper chord member 11 and the lower chord member 12 are spaced apart from each other by a predetermined interval, and a plurality of diagonal members 13 and vertical members 14 for supporting loads can be fixedly connected between the upper chord member 11 and the lower chord member 12. That is, the two ends of the diagonal members 13 and the vertical members 14 can be connected and fixed to the upper chord member 11 and the lower chord member 12. The truss panel 10, including the upper chord member 11 and the lower chord member 12 connected by the vertical members 14 and the diagonal members 13, is constructed as a unit, and a prefabricated truss bridge can be manufactured by connecting the truss panels 10 of each unit.

[0038] The connecting members 100 can be respectively disposed at both ends of the upper chord member 11 and the two ends of the lower chord member 12 of the truss panel 10, and each connecting member 100 is configured such that its length can be adjusted by a length adjusting device. For example, the length adjustment of the connecting member 100 by the length adjusting device can be performed by a bolt fastening structure of bolt holes, a sliding structure according to hydraulic operation, a threaded connection structure, or a wedge-shaped connection portion.

[0039] Reference Figure 4 and Figure 5 A length adjustment device according to an embodiment of the present disclosure will be described.

[0040] Figure 4This is a view showing a cross-sectional plan view and a front cross-sectional view of the length adjusting device of the camber adjusting apparatus according to an embodiment of the present disclosure. Figure 5 This is a view showing a cross-sectional plan view and a front view of the cross-section, which show the cross-sectional plan view through the front view of the cross-section. Figure 4 The length adjustment device adjusts the length of the connecting component.

[0041] Reference Figure 4 and Figure 5 The length adjustment device of the camber adjustment device according to this embodiment may include bolt holes 110 formed in the upper chord member 11 and the lower chord member 12, through holes 102a formed in the connecting member 100, and fixing bolts 120 inserted into and fixed to the bolt holes 110 and the through holes 102a.

[0042] Bolt holes 110 can be formed at regular intervals along the length of the upper chord member 11 and the lower chord member 12. For example, a plurality of bolt holes 110 are formed in the direction toward the center relative to both ends of the upper chord member 11 and the lower chord member 12. Here, the bolt holes 110 can be formed to penetrate from the front-rear direction of the upper chord member 11 and the lower chord member 12, but are not limited thereto, and the bolt holes 110 can be formed in the vertical direction.

[0043] The connecting member 100 can be configured such that a portion of it is inserted from both ends of the upper chord member 11 and the lower chord member 12. That is, the connecting member 100 can be inserted through the hollow portion 11a of the upper chord member 11 and the hollow portion 12a of the lower chord member 12. 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 hollow portions 11a, 12a.

[0044] A fastening portion 101 located at one end of the upper chord member 11 and the lower chord member 12 is connected to a fastening portion 101 of a connecting member 100 located at the other end of the adjacent upper chord member 11 and the lower chord member 12. A fastening hole 101a is formed at the center of the fastening portion 101 for assembling a fastening member 103 therein. Therefore, when adjacent fastening portions 101 overlap each other, the fastening hole 101a is positioned at the same location. In this state, when the fastening member 103 is inserted into the fastening hole 101a, the adjacent fastening portions 101 can be connected and fixed to each other. At this time, the fastening member 103 can be composed of a pin, bolt, or nut inserted and fixed to the fastening hole 101a.

[0045] The insertion portion 102 extends from the fastening portion 101 and can be configured to be inserted into the hollow portion 11a of the upper chord member 11 and the hollow portion 12a of the lower chord member 12. A plurality of through holes 102a can be formed in the insertion portion 102, the plurality of through holes 102a having a spacing corresponding to a plurality of bolt holes 110.

[0046] The fixing bolt 120 is configured to restrict the movement of the connecting member 100 through the bolt hole 110 and the through hole 102a. That is, the fixing bolt 120 can be tightened to the bolt hole 110 and the through hole 102a when the insertion length of the connecting member 100 is adjusted so that the bolt hole 110 and the through hole 102a coincide. Therefore, the connecting member 100 can be fixed by adjusting its length along the upper chord member 11 and the lower chord member 12 in the longitudinal direction, and can be connected to adjacent connecting members 100. At this time, at least one fixing bolt 120 can be provided to tighten to the bolt hole 110 and the through hole 102a.

[0047] Meanwhile, the fastening portions 101 provided on one side of the upper chord member 11 and the lower chord member 12 are configured as a pair of fasteners spaced apart from each other, and the fastening portion 101 provided on the other side is configured as a single fastener and is illustrated as being inserted between the pair of fasteners, but is not limited thereto, and its shape can be modified in various ways. For example, if the adjacent upper chord member 11 and the lower chord member 12 are not twisted and the adjacent fastening portions 101 are fastened by the fastening member 103, the formation position of the fastening portions 101 can be changed, or it can have any shape.

[0048] Reference Figure 6 and Figure 7 A length adjustment device according to another embodiment of the present disclosure will be described.

[0049] Figure 6 This is a cross-sectional plan view and a front cross-sectional view illustrating another embodiment of the length adjusting device disposed in the camber adjusting device according to an embodiment of the present disclosure, and Figure 7 This is a view showing a cross-sectional plan view and a front view of the cross-section, which show the cross-sectional plan view through the front view of the cross-section. Figure 6 The length adjustment device adjusts the length of the connecting component.

[0050] Reference Figure 6 and Figure 7 The length adjustment device of the camber adjustment device according to this embodiment may include a hydraulic cylinder 210 inserted and fixed to both ends of the upper chord member 11 and the lower chord member 12, and a connecting member 100 configured to move forward and retract according to the operation of the hydraulic cylinder 210.

[0051] The hydraulic cylinder 210 is provided with one side open and can be inserted and fixed to both ends of the upper chord member 11 and the lower chord member 12, respectively. That is, the open portion can be installed to expose both ends of the chord member 11 and the lower chord member 12. In this case, the hydraulic cylinder 210 can be fixed to the upper chord member 11 and the lower chord member 12 by welding or bolting. The hydraulic cylinder 210 can be configured as a typical hydraulic cylinder that is operated by receiving hydraulic pressure. Therefore, the connecting member 100 inserted through the open portion of the hydraulic cylinder 210 can be configured to advance and retract according to the operation of the hydraulic cylinder 210.

[0052] 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.

[0053] Here, the fastening portion 101 has the same structure as the fastening portion 101 in the aforementioned embodiment. That is, the fastening portion can be connected and fixed to an adjacent fastening portion 101 by the fastening member 103. Therefore, a detailed description of the fastening portion 101 in this embodiment will be omitted.

[0054] The insertion portion 102 is inserted into the hydraulic cylinder 210 and can be configured to move forward and retract according to the operation of the hydraulic cylinder 210. That is, when the hydraulic cylinder 210 is operated and the insertion portion 102 moves toward the adjacent connecting member 100, the fastening portion 101 remains in a connected and fixed state when the adjacent fastening portions 101 are connected and fixed to each other by the fastening member 103.

[0055] Reference Figure 8 and Figure 9 A length adjustment device according to another embodiment of the present disclosure will be described.

[0056] Figure 8 This is a cross-sectional plan view and a front cross-sectional view illustrating another embodiment of the length adjusting device disposed in the camber adjusting device according to an embodiment of the present disclosure, and Figure 9 This is a view showing a cross-sectional plan view and a front view of the cross-section, which show the cross-sectional plan view through the front view of the cross-section. Figure 8 The length adjustment device adjusts the length of the connecting component.

[0057] Reference Figure 8 and Figure 9The length adjustment device of the camber adjustment device according to this embodiment may include a connecting portion 310 inserted and fixed to both ends of the upper chord member 11 and the lower chord member 12, and a connecting member 100 threadedly connected to the connecting portion 310.

[0058] The connecting portion 310 can be inserted into and fixed to both ends of the upper chord member 11 and the lower chord member 12, respectively. In this case, the connecting portion 310 can be fixed to the upper chord member 11 and the lower chord member 12 by welding or bolting. The connecting portion 310 is provided with a connecting hole 311 in which an internal thread 312 is formed. In this case, the internal thread 312 of the connecting hole 311 on one side of the upper chord member 11 and the internal thread 312 of the connecting hole 311 on the other side of the upper chord member 11 and the lower chord member 12 can be formed in opposite directions.

[0059] The connecting member 100 is threaded to the internal thread 312 of the connecting hole 311 and can be configured to advance and retract according to the direction of rotation. 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 connecting hole 311.

[0060] Here, the fastening portion 101 has the same structure as the fastening portion 101 in the aforementioned embodiment. That is, the fastening portion can be connected and fixed to an adjacent fastening portion 101 by the fastening member 103. Therefore, a detailed description of the fastening portion 101 in this embodiment will be omitted.

[0061] The insertion portion 102 is formed to extend from the fastening portion 101, and an external thread 102b may be formed on the outer peripheral surface of the insertion portion 102. Therefore, the insertion portion 102 is threadedly connected to the internal thread 312 and inserted into the connecting portion 310. That is, the connecting member 100 advances and retracts from the connecting portion 310 according to the rotation direction of the connecting member 100.

[0062] On the other hand, since the internal threads 312 formed in the connecting holes 311 of the facing connecting portions 310 are formed in opposite directions, the connecting members 100 threaded to the corresponding connecting holes 311 move in the same way when rotated in opposite directions. For example, when the connecting member 100 on one side of the upper chord member 11 and the lower chord member 12 rotates clockwise, the connecting member 100 moves outward, and when the connecting member 100 on the other side of the upper chord member 11 and the lower chord member 12 rotates counterclockwise, the connecting member 100 moves outward. Therefore, it is possible to adjust the length by rotating the connected connecting members 100 after connecting and fixing the adjacent connecting members 100.

[0063] Reference Figures 10 to 12 A length adjustment device according to another embodiment of the present disclosure will be described.

[0064] Figure 10 This is a cross-sectional plan view and a front cross-sectional view illustrating another embodiment of the length adjusting device provided in the camber adjusting device according to an embodiment of the present disclosure. Figure 11 This is a view showing a cross-sectional plan view and a front view of the cross-section, which show the cross-sectional plan view through the front view of the cross-section. Figure 10 The length adjustment device adjusts the length of the connecting component, and Figure 12 It shows the setting Figure 10 A partial sectional perspective view of the length adjustment device in the arch adjustment device.

[0065] Reference Figures 10 to 12 The length adjustment device of the camber adjustment device according to this embodiment may include an intermediate connecting portion 410 inserted into the two ends of the upper chord member 11 and the lower chord member 12, a connecting member 100 inserted into and fixed to the intermediate connecting portion 410, and a fixing bolt 420 for limiting the movement of the intermediate connecting portion 410.

[0066] The intermediate connecting portion 410 can be inserted into the two ends of the upper chord member 11 and the lower chord member 12, respectively. In the intermediate connecting portion 410, internal wedge-shaped concave-convex portions 412 can be formed on the two inner surfaces along the length direction. That is, the internal wedge-shaped concave-convex portions 412 can be formed to face each other.

[0067] The connecting member 100 is provided with an outer wedge-shaped concave-convex portion 102c corresponding to the inner wedge-shaped concave-convex portion 412, so that the connecting member 100 can be selectively fixed at a predetermined position in the intermediate connecting portion 410. 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 intermediate connecting portion 410.

[0068] Here, the fastening portion 101 has the same structure as the fastening portion 101 in the aforementioned embodiment. That is, the fastening portion can be connected and fixed to an adjacent fastening portion 101 by the fastening member 103. Therefore, a detailed description of the fastening portion 101 in this embodiment will be omitted.

[0069] The insertion portion 102 can extend from the fastening portion 101, and an external wedge-shaped concave-convex portion 102c can be formed on the outer surface of the insertion portion 102. That is, on the outer surface of the insertion portion 102, the external wedge-shaped concave-convex portion 102c that mates with the internal wedge-shaped concave-convex portion 412 can be formed to face the internal wedge-shaped concave-convex portion 412. Therefore, it can be configured such that: when the length is adjusted by moving the connecting member 100 forward and backward in the direction of the adjacent connecting member 100, the intermediate connecting portion 410 is fixedly moved, and after the length is adjusted, the intermediate connecting portion 410 is fixed by the fixing bolt 420.

[0070] The fixing bolt 420 can be configured to penetrate the upper chord member 11, the lower chord member 12, and the intermediate connecting portion 410 to restrict movement of the intermediate connecting portion 410. Although not shown, bolt holes for inserting and fixing the fixing bolt 420 can be formed in the intermediate connecting portion 410, the upper chord member 11, and the lower chord member 12. Furthermore, the bolt holes (not shown) can be formed at regular intervals along the length of the intermediate connecting portion 410, and therefore, bolt holes can be formed in the upper chord member 11 and the lower chord member 12 at intervals corresponding to the bolt holes.

[0071] The length of the connecting member 100 can be adjusted using the length adjusting device according to various embodiments as described above. That is, by adjusting the length of the connecting member 100, which is respectively located at both ends of the upper chord member 11 and the lower chord member 12, to connect and fix adjacent truss panels 10, a prefabricated truss bridge 1 with an camber can be manufactured. To impart this camber, the length of the connecting member 100 must be adjusted such that the total length of the upper chord member 11, including the length of the connecting member 100 (see reference...). Figure 1 The “L1” in the figure is formed to be longer than the total length of the lower chord member 12 including the length of the connecting member 100 (see reference). Figure 1 The "L2" in the figure is longer (L1 > L2). When adjacent truss panels 10 are assembled using the length-adjustable connecting member 100 as described above, it is possible to manufacture as follows: Figure 3 The prefabricated truss bridge 1 shown is given an arch.

[0072] At the same time, when the length of the connecting member 100 is adjusted, the length of the connecting member 100 can be selectively adjusted according to the overall length of the bridge, so that the given camber can be easily adjusted.

[0073] As described above, although the present disclosure has been described with reference to limited embodiments and accompanying drawings, the present disclosure is not limited thereto, and it is naturally understood that those skilled in the art to which this disclosure pertains can make various modifications and variations within the technical spirit of the present disclosure and the equivalents of the appended claims.

Claims

1. A camber adjustment device for a prefabricated truss bridge, the prefabricated truss bridge being formed by assembling truss panels consisting of upper chord members, lower chord members, vertical members, and diagonal members in one direction, the camber adjustment device comprising: Connecting members are respectively disposed at both ends of the upper chord member and the lower chord member to connect the upper chord member and the lower chord member to adjacent upper chord members and lower chord members. The connecting member is configured to be length-adjustable from both ends of the upper chord member and the lower chord member via a length adjustment device.

2. The camber adjustment device for the prefabricated truss bridge according to claim 1, wherein, The length adjustment device includes: Multiple bolt holes are formed at regular intervals along the length direction of the upper chord member and the lower chord member; The connecting member has a plurality of through holes corresponding to the plurality of bolt holes, and the connecting member is configured such that a portion of the connecting member is inserted inwardly from both ends of the upper chord member and the lower chord member; and A fixing bolt is used to adjust the insertion length of the connecting member to restrict the movement of the connecting member through the bolt hole and the through hole.

3. The camber adjustment device for the prefabricated truss bridge according to claim 2, wherein, The connecting component includes: A fastening portion having fastening holes formed therein for fastening members to be assembled into, so as to connect and fix to connecting members provided in adjacent upper chord members and lower chord members; and An insertion portion, which extends from the fastening portion and has the plurality of through holes formed therein.

4. The camber adjustment device for the prefabricated truss bridge according to claim 1, wherein, The length adjustment device includes: A hydraulic cylinder, wherein the hydraulic cylinder is inserted into and fixed to both ends of the upper chord member and the lower chord member; and The connecting member is configured to move forward and retract according to the operation of the hydraulic cylinder.

5. The camber adjustment device for the prefabricated truss bridge according to claim 4, wherein, The connecting component includes: A fastening portion having fastening holes formed therein for fastening members to be assembled into, so as to connect and fix to connecting members provided in adjacent upper chord members and lower chord members; and An insertion portion extends from the fastening portion and is inserted into and mounted in the hydraulic cylinder so as to be able to slide.

6. The camber adjustment device for the prefabricated truss bridge according to claim 1, wherein, The length adjustment device includes: A connecting portion, which is inserted into and fixed to both ends of the upper chord member and the lower chord member, and having a connecting hole in which an internal thread is formed; and The connecting member is threaded to the internal thread of the connecting hole, and the connecting member is configured to advance and retract according to the direction of rotation.

7. The camber adjustment device for a prefabricated truss bridge according to claim 6, wherein, The connecting component includes: A fastening portion having fastening holes formed therein for fastening members to be assembled into, so as to connect and fix to connecting members provided in adjacent upper chord members and lower chord members; and An insertion portion extends from the fastening portion and has an external thread formed on the outer peripheral surface of the insertion portion, the external thread being threaded to the internal thread.

8. The camber adjustment device for the prefabricated truss bridge according to claim 1, wherein, The length adjustment device includes: The intermediate connecting portion is inserted into both ends of the upper chord member and the lower chord member, and the intermediate connecting portion has an internal wedge-shaped concave-convex portion formed on two inner surfaces along the length direction; The connecting member has an outer wedge-shaped concave-convex portion corresponding to the inner wedge-shaped concave-convex portion, and the connecting member is fixed at a predetermined position in the intermediate connecting portion; and A fixing bolt is used to penetrate the upper chord member, the lower chord member, and the intermediate connecting portion to restrict the movement of the intermediate connecting portion.

9. The camber adjustment device for a prefabricated truss bridge according to claim 8, wherein, The connecting component includes: A fastening portion having fastening holes formed therein for fastening members to be assembled into, so as to connect and fix to connecting members provided in adjacent upper chord members and lower chord members; and An insertion portion extends from the fastening portion and has an outer wedge-shaped concave-convex portion formed on a surface facing the inner wedge-shaped concave-convex portion, the outer wedge-shaped concave-convex portion engaging with the inner wedge-shaped concave-convex portion.

10. A prefabricated truss bridge, comprising: A truss panel, which is composed of an upper chord member, a lower chord member, vertical members, and diagonal members; A connecting member is provided at both ends of the upper chord member and the lower chord member, and the connecting member is configured to connect the upper chord member and the lower chord member to adjacent upper chord members and lower chord members; as well as Fastening members are used to connect and secure the connecting member and the connecting members of the adjacent truss panel. The connecting member is configured to be length-adjustable from both ends of the upper chord member and the lower chord member via a length adjustment device. Each truss panel is assembled such that the total length of the upper chord members, including the length of the connecting members, is longer than the total length of the lower chord members, thereby forming an arch.

11. The prefabricated truss bridge according to claim 10, wherein, The length adjustment device includes: Multiple bolt holes are formed at regular intervals along the length direction of the upper chord member and the lower chord member; A connecting member having a plurality of through holes corresponding to the plurality of bolt holes, and the connecting member being configured such that a portion of the connecting member is inserted inwardly from both ends of the upper chord member and the lower chord member; and A fixing bolt is used to adjust the insertion length of the connecting member to restrict the movement of the connecting member through the bolt hole and the through hole.

12. The prefabricated truss bridge according to claim 11, wherein, The connecting component includes: A fastening portion having fastening holes formed therein for fastening members to be assembled into, so as to connect and fix to connecting members provided in adjacent upper chord members and lower chord members; and An insertion portion, which extends from the fastening portion and has the plurality of through holes formed therein.

13. The prefabricated truss bridge according to claim 10, wherein, The length adjustment device includes: A hydraulic cylinder, wherein the hydraulic cylinder is inserted into and fixed to both ends of the upper chord member and the lower chord member; and The connecting member is configured to move forward and retract according to the operation of the hydraulic cylinder.

14. The prefabricated truss bridge according to claim 13, wherein, The connecting component includes: A fastening portion having fastening holes formed therein for fastening members to be assembled into, so as to connect and fix to connecting members provided in adjacent upper chord members and lower chord members; and An insertion portion extends from the fastening portion and is inserted into and mounted in the hydraulic cylinder so as to be able to slide.

15. The prefabricated truss bridge according to claim 10, wherein, The length adjustment device includes: A connecting portion, which is inserted into and fixed to both ends of the upper chord member and the lower chord member, and having a connecting hole in which an internal thread is formed; and The connecting member is threaded to the internal thread of the connecting hole, and the connecting member is configured to advance and retract according to the direction of rotation.

16. The prefabricated truss bridge according to claim 15, wherein, The connecting component includes: A fastening portion having fastening holes formed therein for fastening members to be assembled into, so as to connect and fix to connecting members provided in adjacent upper chord members and lower chord members; and An insertion portion extends from the fastening portion and has an external thread formed on the outer peripheral surface of the insertion portion, the external thread being threaded to the internal thread.

17. The prefabricated truss bridge according to claim 10, wherein, The length adjustment device includes: The intermediate connecting portion is inserted into both ends of the upper chord member and the lower chord member, and the intermediate connecting portion has an internal wedge-shaped concave-convex portion formed on two inner surfaces along the length direction; The connecting member has an outer wedge-shaped concave-convex portion corresponding to the inner wedge-shaped concave-convex portion, and the connecting member is fixed at a predetermined position in the intermediate connecting portion; and A fixing bolt is used to penetrate the upper chord member, the lower chord member, and the intermediate connecting portion to restrict the movement of the intermediate connecting portion.

18. The prefabricated truss bridge according to claim 17, wherein, The connecting component includes: A fastening portion having fastening holes formed therein for fastening members to be assembled into, so as to connect and fix to connecting members provided in adjacent upper chord members and lower chord members; and An insertion portion extends from the fastening portion and has an outer wedge-shaped concave-convex portion formed on a surface facing the inner wedge-shaped concave-convex portion, the outer wedge-shaped concave-convex portion engaging with the inner wedge-shaped concave-convex portion.

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