A steel truss auxiliary truss plane installation structure

Abstract

The utility model relates to bridge manufacturing technical field, especially a kind of steel truss girder vice truss plane installation structure. Including being set in the segment two sides outer vice truss chord and vice truss strut, vice truss strut connection setting between the vice joint and the lower joint;The vice truss strut in the structure in this is fixed between vice joint and lower joint by bolt, need not high-temperature operation, avoid the structural failure risk caused by material brittle, welding residual stress can also be avoided, improve structure long-term stability, so as to avoid frequent maintenance, bolt connection can be conveniently disassembled and reinstallation, when maintaining, need not cutting, polishing and other complex operation, can greatly shorten maintenance cycle, reduce maintenance cost and risk. The top of lower joint is upper step-shaped end face;The bottom of vice joint is lower step-shaped end face, then the quick and accurate butt joint of vice truss strut and vice joint and lower joint can be carried out, installation efficiency is improved, avoid multiple lifting butt joint, save time and effort.

Description

Technical Field

[0001] This utility model relates to the field of bridge manufacturing technology, and in particular to a planar installation structure for a steel truss sub-truss. Background Technology

[0002] The Chongqi Yangtze River Bridge is a key project of the Shanghai-Nanjing-Hefei High-Speed ​​Railway, with a total length of 4.09 kilometers. The bridge consists of a main navigation span, a non-navigable span, combined road and rail approach bridges on the north and south banks, and separate railway approach bridges on the north and south banks. The main navigation span is a 400-meter main span double-tower, double-cable-stayed steel truss bridge, which is the world's largest span double-tower, double-cable-stayed road and rail dual-purpose ballastless track cable-stayed bridge.

[0003] Traditional steel truss bridges typically use a combination of bolting and welding for the installation of secondary truss struts. However, this requires multiple hoisting operations to achieve precise positioning before welding. During the welding process, the material near the weld becomes brittle, affecting the overall strength and durability of the structure. The residual stress and deformation generated by welding reduce the overall load-bearing capacity, stiffness, and stability of the secondary truss struts, potentially leading to premature structural failure and frequent maintenance. Furthermore, subsequent repairs and replacements require complex operations such as cutting and grinding, resulting in long maintenance cycles and high maintenance costs and risks. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a planar installation structure for steel truss sub-trusses that can be quickly positioned, requires no frequent maintenance, has a short maintenance cycle, low maintenance cost, and low maintenance risk.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a steel truss girder sub-truss planar installation structure, wherein the steel truss girder is spliced ​​from multiple segments, each segment includes two main truss upper chords and two main truss lower chords, and multiple web members are connected between the main truss upper chords and the main truss lower chords, and a horizontal upper bridge deck is connected between the two main truss upper chords, and a horizontal lower bridge deck is connected between the two main truss lower chords, and multiple lower joints are spaced apart on the outside of the main truss lower chords, the lower joints being inclined upward and outward; Its innovation lies in the inclusion of secondary truss members and secondary truss struts set on both sides of the segment; The secondary truss chord is located outside the upper chord of the main truss, and the secondary truss chord is parallel to the upper chord of the main truss. The bottom of the secondary truss chord is provided with multiple secondary joints at intervals. Each secondary joint corresponds to a lower joint, and the secondary joints are inclined toward the lower joint. The secondary truss strut is connected and disposed between the secondary joint and the lower joint; The secondary strut includes a strut body. An upper rectangular structural block is cut off from the inner top of the strut body, so that its top end, from the outside to the inside, consists of a first upper step surface, an upper vertical surface, and a second upper step surface, and the height of the first upper step surface is greater than the height of the second upper step surface. A lower rectangular structural block is cut off from the inner bottom of the strut body, so that its bottom end, from the outside to the inside, consists of a first lower step surface, a lower vertical surface, and a second lower step surface, and the height of the first lower step surface is less than the height of the second lower step surface. The slopes of the first upper step surface, the second upper step surface, the first lower step surface, and the second lower step surface are the same; The top of the lower connector is an upper stepped end face corresponding to the bottom end of the secondary truss member; the bottom of the secondary connector is a lower stepped end face corresponding to the top end of the secondary truss member.

[0006] Furthermore, the secondary truss strut also includes an upper outer connecting plate, an upper inner connecting plate, a lower outer connecting plate, and a lower inner connecting plate; The lower middle part of the upper outer connecting plate is fixedly installed on the outer wall of the top outer side of the strut body; The lower middle part of the upper inner connecting plate is fixedly installed on the inner wall of the top inner side of the strut body, and the top of the upper inner connecting plate is lower than the first upper step surface. A first auxiliary connecting plate is fixedly installed on the inner wall of the bottom outer side of the auxiliary connector, and a third auxiliary connecting plate is fixedly installed on the outer wall of the bottom inner side of the auxiliary connector, and the bottom end of the first auxiliary connecting plate is higher than the second upper step surface. The second auxiliary connecting plate is also fixedly installed on the inner wall of the top outer side of the lower connector, and the fourth auxiliary connecting plate is also fixedly installed on the outer wall of the top inner side of the lower connector, and the top of the second auxiliary connecting plate is lower than the second lower step surface.

[0007] Furthermore, a slider is fixedly installed on both sides of the top of the support rod body near the first upper step surface, and the inclination of the slider is consistent with that of the first upper step surface. A fixing plate is also fixedly installed on the outer walls of both the front and rear sides of the sub-connector, and the bottom end of the fixing plate extends to the bottom of the second upper step surface. A groove is also left on the inner wall of the fixing plate to accommodate the sliding of the slider.

[0008] A lower slider is also fixedly installed on both sides of the bottom of the support rod body near the first lower step surface, and the inclination of the lower slider is consistent with that of the first lower step surface; A lower fixing plate is fixedly installed on both the front and rear outer walls of the lower connector, and the bottom end of the lower fixing plate extends to the bottom of the first lower step surface. A sliding groove is also left on the inner wall of the lower fixing plate to accommodate the sliding of the lower slider.

[0009] Furthermore, the first, second, third, and fourth auxiliary connecting plates are all bolted to the support rod body.

[0010] Furthermore, the upper outer connecting plate and the upper inner connecting plate are also fixedly connected to the auxiliary connector bolt, and the lower outer connecting plate and the lower inner connecting plate are also fixedly connected to the lower connector bolt.

[0011] Furthermore, a bridge deck is fixedly installed between the upper chord of the main truss and the secondary truss chord.

[0012] The advantages of this utility model are: 1. In this structure, the secondary truss struts are fixed to the secondary joints and the lower joints with bolts. This eliminates the need for high-temperature operations, avoids the risk of structural failure due to material brittleness, and also avoids the generation of welding residual stress, thereby improving the long-term stability of the structure. This can reduce the need for frequent maintenance. At the same time, the bolted connection allows for easy disassembly and reinstallation. During maintenance, there is no need for complicated operations such as cutting and grinding, which can significantly shorten the maintenance cycle and reduce maintenance costs and risks.

[0013] 2. The top of the lower connector is a stepped end face corresponding to the bottom of the secondary truss member; the bottom of the secondary connector is a stepped end face corresponding to the top of the secondary truss member. This allows for quick and accurate docking of the secondary truss member with the secondary connector and the lower connector, improving installation efficiency, avoiding multiple hoisting and docking operations, and saving time and effort.

[0014] 3. Fixing plates are also fixedly installed on the outer walls of the front and rear sides of the auxiliary joint. The inner wall of the fixing plate is provided with a sliding groove, and the strut body is provided with a corresponding slider. In actual assembly, by first installing the fixing block on one side, and then using the slider and the sliding groove to achieve auxiliary positioning between the strut body and the auxiliary joint, the fixing block on the other side is installed, and finally the strut body is pushed to the bottom along the extension direction of the sliding groove. This achieves precise and quick docking between the auxiliary strut strut and the auxiliary joint without the need for multiple docking operations. Attached Figure Description

[0015] Figure 1 This is the front view of the present invention.

[0016] Figure 2 This is a partial structural front view of the present utility model.

[0017] Figure 3 A partial structural cross-section of this utility model. Figure 1 .

[0018] Figure 4 A partial structural cross-section of this utility model. Figure 2 . Detailed Implementation

[0019] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0020] The steel truss girder is composed of multiple segments. Each segment includes two main truss upper chords 1 and two main truss lower chords 2. Multiple web members are connected between the main truss upper chords 1 and the main truss lower chords 2. A horizontal upper bridge deck is connected between the two main truss upper chords 1 and a horizontal lower bridge deck is connected between the two main truss lower chords 2. Multiple lower joints 6 are also provided at intervals on the outside of the main truss lower chords 2. The lower joints 6 are inclined upward and outward.

[0021] like Figures 1-4 The diagram shows a planar installation structure for a steel truss girder sub-truss, including sub-truss chord members 3 and sub-truss struts 4 located on both sides of the segment. A bridge deck is also fixedly installed between the main truss top chord 1 and the sub-truss chord members 3.

[0022] The secondary truss chord 3 is located on the outside of the upper chord 1 of the main truss, and the secondary truss chord 3 is parallel to the upper chord 1 of the main truss. Multiple secondary joints 5 are provided at intervals at the bottom of the secondary truss chord 3. The secondary joints 5 correspond one-to-one with the lower joints 6, and the secondary joints 5 are inclined toward the lower joints 6.

[0023] The secondary truss strut 4 is connected between the secondary joint 5 and the lower joint 6.

[0024] The secondary truss strut 4 includes a strut body 41, which includes an upper large hollow cube segment, a middle connecting segment, and a lower small hollow cube segment.

[0025] The bottom of the secondary connector 5 is a large square segment corresponding to the upper large hollow cube segment, and the top of the lower connector 6 is a small square segment corresponding to the lower small hollow cube segment.

[0026] The side of the strut body 41 closest to the upper chord 1 and the lower chord 2 of the main truss is designated as the inner side. A rectangular structural block is cut off from the inner top of the strut body 41, so that its top end consists of a first upper step surface 411, an upper vertical surface 412, and a second upper step surface 413 from the outside to the inside, and the height of the first upper step surface 411 is greater than the height of the second upper step surface 413.

[0027] A rectangular structural block is cut off from the bottom inner side of the strut body 41, so that its bottom end consists of a first lower step surface 414, a lower vertical surface 415 and a second lower step surface 416 from the outside to the inside, and the height of the first lower step surface 414 is less than the height of the second lower step surface 416.

[0028] The slopes of the first upper step surface 411, the second upper step surface 413, the first lower step surface 414, and the second lower step surface 416 are the same.

[0029] The top of the lower connector 6 is a stepped end face corresponding to the bottom of the secondary truss member 4. The bottom of the secondary connector 5 is a stepped end face corresponding to the top of the secondary truss member 4.

[0030] This allows for quick and precise connection of the secondary truss strut 4 with the secondary connector 5 and the lower connector 6, improving installation efficiency, avoiding multiple hoisting and connection operations, and saving time and effort.

[0031] The secondary truss strut 4 also includes an upper outer connecting plate 42, an upper inner connecting plate 43, a lower outer connecting plate 44, and a lower inner connecting plate 45. The widths of the upper outer connecting plate 42 and the upper inner connecting plate 43 are smaller than the width of the upper large hollow cube segment, and the widths of the lower outer connecting plate 44 and the lower inner connecting plate 45 are smaller than the width of the lower small hollow cube segment.

[0032] The lower middle part of the upper outer connecting plate 42 is fixedly installed on the middle of the outer wall of the top outer side of the strut body 41.

[0033] The lower middle part of the upper inner connecting plate 43 is fixedly installed on the middle of the inner wall of the top inner side of the strut body 41, and the top of the upper inner connecting plate 43 is lower than the first upper step surface 411.

[0034] The upper middle part of the lower inner connecting plate 45 is fixedly installed in the middle of the inner wall of the bottom inner side of the strut body 41, and the bottom end of the lower inner connecting plate 45 is higher than the first lower step surface 414.

[0035] The upper middle part of the lower outer connecting plate 44 is fixedly installed on the middle of the outer wall of the bottom outer side of the strut body 41.

[0036] A first auxiliary connecting plate 51 is fixedly installed on the inner wall of the outer side of the large square section at the bottom of the auxiliary connector 5, and a third auxiliary connecting plate 52 is fixedly installed on the outer wall of the inner side of the bottom of the auxiliary connector 5. The bottom end of the first auxiliary connecting plate 51 is higher than the second upper step surface 413.

[0037] A second connecting plate 61 is fixedly installed on the inner wall of the outer side of the small square segment at the top of the lower connector 6, and a fourth connecting plate 62 is fixedly installed on the outer wall of the inner side of the top of the lower connector 6. The top of the second connecting plate 61 is lower than the second lower step surface 416.

[0038] A slider 55 is also fixedly installed on both sides of the top of the strut body 41 near the first upper step surface 411. The inclination of the slider 55 is consistent with that of the first upper step surface 411.

[0039] A fixing plate 53 is fixedly installed on the outer walls of both the front and rear sides of the sub-connector 5, and the bottom end of the fixing plate 53 extends to the bottom of the second upper step surface 413. A groove 54 is left on the inner wall of the fixing plate 53 to accommodate the sliding of the slider 55.

[0040] In actual assembly, by first installing the fixing plate on one side, and then using the slider 55 and the slide groove 54 to achieve auxiliary positioning between the strut body 41 and the auxiliary connector 5, then installing the fixing plate on the other side, and finally pushing the strut body 41 to the bottom along the extension direction of the slide groove 54, the sub-truss strut 4 and the auxiliary connector 5 can be accurately and quickly connected without multiple connections.

[0041] A lower slider is fixedly installed on both sides of the bottom of the support body 41 near the first lower step surface 414, and the inclination of the lower slider is consistent with that of the first lower step surface 414.

[0042] A lower fixing plate 63 is fixedly installed on both the front and rear outer walls of the lower connector 6, and the bottom end of the lower fixing plate 63 extends to the bottom of the first lower step surface 414. A sliding groove 54 is left on the inner wall of the lower fixing plate 63 to accommodate the sliding of the lower slider.

[0043] The first connecting plate 51, the second connecting plate 61, the third connecting plate 52, and the fourth connecting plate 62 are all bolted to the support rod body 41.

[0044] The upper outer connecting plate 42 and the upper inner connecting plate 43 are also fixed to the auxiliary connector 5 with bolts, and the lower outer connecting plate 44 and the lower inner connecting plate 45 are also fixed to the lower connector 6 with bolts.

[0045] In this structure, the secondary truss strut 4 is fixed to the secondary joint 5 and the lower joint 6 by bolts. This eliminates the need for high-temperature operations, avoids the risk of structural failure due to material brittleness, and also avoids the generation of welding residual stress, thereby improving the long-term stability of the structure. This can reduce the need for frequent maintenance. At the same time, the bolted connection allows for easy disassembly and reinstallation. During maintenance, there is no need for complex operations such as cutting and grinding, which can significantly shorten the maintenance cycle and reduce maintenance costs and risks.

[0046] The working principle of this patent: A fixing plate 53 and a lower fixing plate 63 are pre-fixed on the front sides of the secondary joint 5 and the lower joint 6, respectively. Then, the secondary truss strut 4 is hoisted to the rear side of the secondary joint 5 and the lower joint 6. Then, the secondary truss strut 4 is moved so that the upper inner connecting plate 43 and the lower inner connecting plate 45 of the secondary truss strut 4 are respectively inside the first secondary connecting plate 51 and the second secondary connecting plate 61. Figures 3-4As shown, the secondary truss strut 4 is then adjusted so that its slider 55 and lower slider are simultaneously in the slide groove 54 and lower slide groove 54, respectively. Then, a fixing plate 53 and a lower fixing plate 63 on the rear side of the secondary joint 5 and the lower joint 6 are pre-installed. Finally, the secondary truss strut 4 is pushed inward so that it moves along the slide groove 54 until the top and bottom ends of the strut body 41 are aligned with the bottom of the secondary joint 5 and the top of the lower joint 6, respectively. Then, the multiple fixing plates 53, lower fixing plate 63, connecting plates, secondary connecting plates, etc. are all bolted and fixed.

[0047] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A planar installation structure for a steel truss girder sub-truss, wherein the steel truss girder is spliced ​​from multiple segments, each segment including two main truss upper chords and two main truss lower chords, and multiple web members are connected between the main truss upper chords and the main truss lower chords, and a horizontal upper bridge deck is connected between the two main truss upper chords, and a horizontal lower bridge deck is connected between the two main truss lower chords, and multiple lower joints are spaced apart on the outside of the main truss lower chords, the lower joints being inclined upward and outward; Its features are: This includes secondary truss members and secondary truss struts located on both sides of the segment; The secondary truss chord is located outside the upper chord of the main truss, and the secondary truss chord is parallel to the upper chord of the main truss. The bottom of the secondary truss chord is provided with multiple secondary joints at intervals. Each secondary joint corresponds to a lower joint, and the secondary joints are inclined toward the lower joint. The secondary truss strut is connected and disposed between the secondary joint and the lower joint; The secondary strut includes a strut body. An upper rectangular structural block is cut off from the inner top of the strut body, so that its top end, from the outside to the inside, consists of a first upper step surface, an upper vertical surface, and a second upper step surface, and the height of the first upper step surface is greater than the height of the second upper step surface. A lower rectangular structural block is cut off from the inner bottom of the strut body, so that its bottom end, from the outside to the inside, consists of a first lower step surface, a lower vertical surface, and a second lower step surface, and the height of the first lower step surface is less than the height of the second lower step surface. The slopes of the first upper step surface, the second upper step surface, the first lower step surface, and the second lower step surface are the same; The top of the lower connector is an upper stepped end face corresponding to the bottom end of the secondary truss member; the bottom of the secondary connector is a lower stepped end face corresponding to the top end of the secondary truss member.

2. The planar installation structure of a steel truss secondary truss according to claim 1, characterized in that: The secondary truss strut also includes an upper outer connecting plate, an upper inner connecting plate, a lower outer connecting plate, and a lower inner connecting plate; The lower middle part of the upper outer connecting plate is fixedly installed on the outer wall of the top outer side of the strut body; The lower middle part of the upper inner connecting plate is fixedly installed on the inner wall of the top inner side of the strut body, and the top of the upper inner connecting plate is lower than the first upper step surface. A first auxiliary connecting plate is also fixedly installed on the inner wall of the bottom outer side of the auxiliary connector, and the bottom end of the first auxiliary connecting plate is higher than the second upper step surface. A second connecting plate is also fixedly installed on the inner wall of the top outer side of the lower connector, and the top of the second connecting plate is lower than the second lower step surface.

3. The planar installation structure of a steel truss secondary truss according to claim 1, characterized in that: A slider is also fixedly installed on both sides of the top of the support rod body near the first upper step surface, and the inclination of the slider is consistent with that of the first upper step surface. A fixing plate is also fixedly installed on the outer walls of both the front and rear sides of the sub-connector, and the bottom end of the fixing plate extends to the bottom of the second upper step surface. A groove is also left on the inner wall of the fixing plate to accommodate the sliding of the slider.

4. The planar installation structure of a steel truss secondary truss according to claim 2, characterized in that: Both the first and second connecting plates are bolted to the support rod body.

5. The planar installation structure of a steel truss secondary truss according to claim 2, characterized in that: The upper outer connecting plate and the upper inner connecting plate are also fixedly connected to the auxiliary connector bolts, and the lower outer connecting plate and the lower inner connecting plate are also fixedly connected to the lower connector bolts.

6. The planar installation structure of a steel truss secondary truss according to claim 1, characterized in that: A bridge panel is also fixedly installed between the upper chord of the main truss and the secondary truss chord.

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