Temporary support frame structure of stiffening chord on steel truss bridge and construction method thereof

Abstract

The present application relates to the technical field of support, and discloses a kind of steel truss bridge upper stiffening chord temporary support frame structure and its construction method, including multiple different height support modules, multiple the support module is sequentially spaced according to height from low to high and is detachably connected using connecting system, and different height support modules are sequentially detachably connected from bottom to top by bottom support unit, different number of variable height support units and top support unit, the height of the top of the side of top support unit is less than the height of the other side top. The purpose of the present application is to solve the problem of low utilization rate, high cost, material waste and difficult hoisting and installation of temporary support on large-tonnage steel truss bridge upper stiffening chord.

Description

Technical Field

[0001] This invention relates to the field of support technology, and in particular to a temporary support structure for stiffening chords on a steel truss bridge and its construction method. Background Technology

[0002] In recent years, the construction of long-span bridges has developed rapidly, and steel truss bridges are increasingly appearing in actual projects. The construction of stiffening chords on large tonnage bridges places high demands on temporary supports, posing a significant challenge to their construction.

[0003] Traditionally, the upper stiffening chord support frame is first assembled and welded in the factory, then lifted to the bridge deck using a large-tonnage crane, and finally positioned on the bridge deck using another crane. This requires the fabrication of a large number of temporary steel pipe support frames of varying heights and widths to meet on-site construction needs. It also requires large-tonnage cranes with long booms, which are difficult to rotate. Furthermore, the turnover rate of the temporary steel pipe support frames after use is low, and most of them are disposable. Reusing them is costly and wastes materials significantly, greatly reducing economic efficiency. In addition, the above method involves a large amount of welding and gas cutting operations, resulting in significant material loss, energy consumption, and a large amount of labor time. Disassembly and assembly are also inconvenient. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a temporary support frame structure for stiffening chords on steel truss bridges and its construction method, aiming to solve the problems of low utilization rate, high cost, material waste, and difficult hoisting and installation of temporary supports for stiffening chords on large-tonnage steel truss bridges.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] A temporary support frame structure for stiffening chords on a steel truss bridge includes multiple support modules of different heights. The multiple support modules are arranged at intervals from low to high and are detachably connected by a connecting system. The support modules of different heights are detachably connected from bottom to top by a bottom support unit, a different number of variable height support units, and a top support unit. The height of the top of one side of the top support unit is less than the height of the top of the other side.

[0007] Furthermore, the bottom support unit, the variable height support unit, and the top support unit each include four vertically arranged pipe columns in a rectangular array. The four pipe columns corresponding to the variable height support unit and the top support unit are connected to each other to form a whole. The pipe columns of adjacent support units correspond one-to-one and are detachably connected. The height of the two pipe columns on one side of the top support unit is less than the height of the two pipe columns on the other side, and a distribution beam is erected on the top of the pipe columns on both sides.

[0008] Furthermore, each column of the bottom support unit has several first ear plates evenly distributed near the top of its column surface; each column of the variable height support unit has several first ear plates evenly distributed near the top and bottom of its column surface; each column of the top support unit has several first ear plates evenly distributed near the bottom of its column surface; and the first ear plates on the column surfaces of adjacent support units are connected by bolts using bolted plates.

[0009] Furthermore, each column of the bottom support unit has several stiffening plates evenly distributed at the bottom of its column surface.

[0010] Furthermore, each column of the bottom support unit is provided with an end ring at its top, each column of the variable height support unit is provided with its bottom and top, and each column of the top support unit is provided with its bottom.

[0011] Furthermore, each column of the top support unit is provided with a support plate at its top, and the distribution beam is placed on the support plate.

[0012] Furthermore, each column of the top support unit has several stiffening plates connecting its column surface to the corresponding foundation plate.

[0013] Furthermore, the connection system includes a connecting rod and a second ear plate disposed on the opposite surface of the adjacent support module, wherein the second ear plate on the opposite surface of the adjacent support module is bolted to both ends of the connecting rod.

[0014] The bottom slope of the bottom support unit is consistent with the slope of the bridge deck at the corresponding location.

[0015] A construction method for a temporary stiffening chord support structure on a steel truss bridge includes:

[0016] Based on the projection of the upper stiffening chord onto the bridge deck of the steel truss bridge, mark the installation positions of the support modules.

[0017] At the corresponding installation position, the bottom support unit, a different number of variable height support units and the top support unit are detachably connected from bottom to top to form support modules with heights arranged at intervals from low to high, so that the top of the top support unit of each support module can rest against the bottom of the upper stiffening chord.

[0018] The multiple support modules are detachably connected using a connecting system.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] This invention provides a temporary support frame structure for stiffening chords on steel truss bridges. Multiple support modules are arranged at intervals from low to high and are detachably connected using a connecting system. The support modules of different heights are composed of a bottom support unit, a varying number of variable-height support units, and a top support unit, all detachably connected from bottom to top. The height of one side of the top support unit is less than the height of the other side. Therefore, during installation and use, support modules of different heights can be assembled sequentially using the bottom support unit, the varying number of variable-height support units, and the top support unit. Each support unit is small in size and weight, and any combination can meet the height requirements of the support modules. Assembly and disassembly are flexible, simple, and quick, eliminating the need for large hoisting machinery. Construction is convenient and efficient, effectively solving the problems of low utilization rate, high cost, material waste, and difficult hoisting and installation of temporary supports for stiffening chords on large-tonnage steel truss bridges.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the installation of stiffening chords on a temporary support frame structure for stiffening chords on a steel truss bridge, according to an embodiment of the present invention.

[0024] Figure 2 This is a schematic diagram of a temporary stiffening chord support frame structure for a steel truss bridge according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the tubular column of the bottom support unit in a temporary stiffening chord support frame structure for a steel truss bridge according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the tube column of a variable height support unit in a stiffening chord temporary support frame structure for a steel truss bridge according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the tube column of the top support unit in a temporary stiffening chord support frame structure for a steel truss bridge according to an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the column connection in a temporary stiffening chord support frame structure for a steel truss bridge according to an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the connection system in a temporary support frame structure for stiffening chords on a steel truss bridge according to an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the V-shaped connecting brace connection of a stiffening chord temporary support frame structure on a steel truss bridge according to an embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the Z-shaped connecting brace connection of a stiffening chord temporary support frame structure on a steel truss bridge according to an embodiment of the present invention;

[0032] Figure 10 This is a front view of the distribution beam in a temporary stiffening chord support structure for a steel truss bridge according to an embodiment of the present invention;

[0033] Figure 11 This is a side view of the distribution beam in a temporary stiffening chord support frame structure for a steel truss bridge according to an embodiment of the present invention;

[0034] Figure 12 The installation position point diagram is projected onto the bridge deck based on the direction of the stiffening chord of the support frame structure.

[0035] In the diagram: 1-Support module; 100-Bottom support unit; 101-Variable height support unit; 102-Top support unit;

[0036] 2-Connecting system; 200-Connecting member; 201-Second ear plate; 3-Distribution beam; 4-Upper stiffening chord; 5-Bridge deck;

[0037] A- Pipe column; B- First ear plate; C- Bolted plate; D- Stiffening plate; E- End ring; F- Foundation plate. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] like Figure 1 and Figure 2As shown in the figure, an embodiment of the present invention provides a temporary support structure for the stiffening chord of a steel truss bridge, comprising multiple support modules 1 of different heights. These support modules 1 are arranged at intervals from low to high and are detachably connected by a connecting system 2. Each support module 1 of different heights, from bottom to top, is composed of a bottom support unit 100, a varying number of variable-height support units 101, and a top support unit 102, all detachably connected. The height of one side of the top support unit 102 is less than the height of the other side, conforming to the direction of the upper stiffening chord. In other words, using a detachable and modular structure to temporarily support the stiffening chord of a steel truss bridge effectively solves the problems of low utilization rate, high cost, material waste, and difficult hoisting and installation of temporary supports for the stiffening chord of large-tonnage steel truss bridges.

[0040] Specifically, a construction method for a temporary support frame structure for the stiffening chord of a steel truss bridge involves marking the installation positions of support modules 1 based on the projection of the upper stiffening chord 4 onto the bridge deck 5 of the steel truss bridge; at the corresponding installation positions, bottom support units 100, varying numbers of variable-height support units 101, and top support units 102 are detachably connected from bottom to top to form support modules 1 spaced apart in order of height from low to high, so that the top of the top support unit 102 of each support module 1 can rest against the bottom of the upper stiffening chord 4; multiple support modules 1 are detachably connected using a connecting system 2.

[0041] In one embodiment, combined with Figure 2 , Figure 8 and Figure 9 As shown, the bottom support unit 100, the variable height support unit 101, and the top support unit 102 each include four vertically arranged pipe columns A in a rectangular array. The four pipe columns A corresponding to the variable height support unit 101 and the top support unit 102 are interconnected to form a whole. The pipe columns A of adjacent support units correspond one-to-one and are detachably connected. Preferably, the height of the pipe columns A constituting the bottom support unit 100 is 0.4m-0.6m. The height of the two pipe columns A on one side of the top support unit 102 is smaller than the height of the two pipe columns A on the other side, and a distribution beam 3 is provided on the top of the pipe columns A on both sides. That is, by setting the distribution beam 3, the upper stiffening chord 4 is supported.

[0042] For example, such as Figure 1As shown, a temporary support frame structure for stiffening chords on a steel truss bridge includes four support modules 1 from left to right. In this embodiment, it includes two types of variable-height support units 101 with different heights: one type with a height of 4m and the other type with a height of 8m. These support units are used in combination. In this embodiment, the column A is made of steel pipe with a diameter of 630mm and a thickness of 8mm. The top support unit 102 consists of four steel pipes of two different heights, with the bottom ends of the four steel pipes at the same horizontal plane. In this embodiment, the heights of the two types of steel pipes constituting the top support unit 102 are 4m and 5.5m.

[0043] In this embodiment, the four columns A corresponding to the variable height support unit 101 and the top support unit 102 are interconnected to form a whole, combined with Figure 8 As shown, the longitudinal bridge columns are connected by V-shaped connecting braces. Each V-shaped connecting brace is formed by welding two transverse steel pipes and two diagonal steel pipes. The diameter of the transverse and diagonal steel pipes in the V-shaped connecting brace is 325mm, and the thickness is 6mm. (Combined with...) Figure 9 As shown, the transverse steel pipes are connected by Z-shaped connecting braces. The Z-shaped connecting brace is formed by welding two transverse steel pipes and one diagonal steel pipe. The diameter of the transverse steel pipe and the diagonal steel pipe of the Z-shaped connecting brace is 425mm and the thickness is 6mm.

[0044] In one embodiment, combined with Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, each column A of the bottom support unit 100 has several first ear plates B evenly distributed near the top of its cylindrical surface. Each column A of the variable height support unit 101 has several first ear plates B evenly distributed near both the top and bottom of its cylindrical surface. Each column A of the top support unit 102 has several first ear plates B evenly distributed near the bottom of its cylindrical surface. The first ear plates B on the cylindrical surfaces of adjacent support units are connected by bolts using bolted plates C. In other words, the outer wall of the first ear plate B uses two externally attached bolted plates C with bolt holes, aligned with the bolt holes, and connected using high-strength bolts to form a single support frame of the required design height.

[0045] For example, in the bottom support unit 100, four first ear plates B are evenly welded and fixed to the cylindrical surface of each column A near the top. In the variable height support unit 101, four first ear plates B are evenly welded and fixed to the cylindrical surface of each column A near the top and bottom, respectively. In the top support unit 102, four first ear plates B are evenly welded and fixed to the cylindrical surface of each column A near the bottom. The first ear plates B on the cylindrical surface of adjacent support units are connected by bolts using bolt plates C. The connection is achieved by the bolt plates C fitting against the two sides of the first ear plates B. In this embodiment, the dimensions of the first ear plate B are 200mm wide, 300mm high, and 12mm thick, with a bolt hole diameter of 25mm and a bolt hole spacing of 80mm.

[0046] In one embodiment, combined with Figure 2 and Figure 3 As shown, each column A of the bottom support unit 100 has several stiffening plates D evenly distributed at the bottom of its column surface. For example, each column A of the bottom support unit 100 has eight stiffening plates D evenly welded and fixed to its bottom circumferentially, and the eight stiffening plates D are welded to the bridge deck 5 of the steel truss.

[0047] Preferably, the bottom slope of the bottom support unit 100 is consistent with the slope of the bridge deck at the corresponding position, that is, the column feet of the four pipe columns A of the bottom support unit 100 have a slope, and the slope is cut and laid out according to the longitudinal and transverse slopes of the steel beam bridge deck.

[0048] Better, combination Figure 3 , Figure 4 and Figure 5 As shown, each column A of the bottom support unit 100 is provided with an end ring E at its top, each column A of the variable height support unit 101 is provided with its bottom and top, and each column A of the top support unit 102 is provided with its bottom. The end ring E enables better docking contact between adjacent columns A. For example, the end ring E is connected to the column A by welding. The dimensions of the end ring E are an inner diameter of 630 mm, a width of 20 mm, and a thickness of 12 mm.

[0049] In one embodiment, such as Figure 5 As shown, a base plate F is provided on the top of each column A in the top support unit 102, and the distribution beam 3 is placed on the base plate F. For example, each column A has a square base plate F at its top. Preferably, eight evenly distributed stiffening plates D are welded to the column A to improve the structural strength.

[0050] Combination Figure 10 and Figure 11As shown, in this embodiment, the distribution beam 3 is composed of two welded I-beams and is placed on the square support plate F at the top of the top support unit 102. In this embodiment, the square support plate F has a width of 830mm and a thickness of 12mm.

[0051] In one embodiment, combined with Figure 2 and Figure 7 As shown, the connecting system 2 includes a connecting rod 200 and a second ear plate 201 disposed on the opposite surface of the adjacent support module 1. The second ear plate 201 on the opposite surface of the adjacent support module 1 is bolted to both ends of the connecting rod 200. In this embodiment, the connecting system 2 uses a single H-beam (connecting rod 200) with three bolt holes at both ends. Two steel plates with bolt holes (second ear plates 201) are welded to the outer wall of the transverse connecting steel pipe. The H-beam is inserted into the reserved gap between the two steel plates welded to the outer wall of the steel pipe and bolted with high-strength bolts to connect a single support frame and enhance the stability of the single support frame. In this embodiment, the H-beam has a height of 450mm and a width of 150mm, and the steel plate has a height of 400mm and a width of 200mm.

[0052] In one embodiment, combined with Figure 1 and Figure 12 As shown, a construction method for a temporary stiffening chord support structure on a steel truss bridge includes the following steps:

[0053] 1) such as Figure 12 As shown, lay out the lines according to the design drawing of the upper stiffening chord 4, and project the direction of the upper stiffening chord 4 onto the bridge deck 5;

[0054] 2) Determine the combined slope of the installation position of the temporary support frame for the upper stiffening chord based on the longitudinal and transverse slopes of the bridge deck 5, and cut the column base of the bottom support unit 100 according to the combined slope.

[0055] 3) Weld the column of the bottom support unit 100 to the positioning point of the upper stiffening chord temporary support frame installation position;

[0056] 4) Based on the design height of the upper stiffening chord, the bottom support unit 100 and different numbers of variable height support units 101 are assembled and bolted together with high-strength bolts;

[0057] 5) The top support unit 102 is connected by high-strength bolts, and a distribution beam 3 is placed at the top to form a single support module 1.

[0058] 6) Weld steel plates with bolt holes to the outer wall of the steel pipe at the lateral connection position of each support module 1, insert I-beams, and connect them with high-strength bolts to form a temporary stiffening chord support frame on the steel truss bridge, such as... Figure 1 As shown.

[0059] 7) After the upper stiffening chord is installed, first remove the transverse connecting system, then remove the top support unit, then remove the variable height support unit 101, and finally cut off the bottom support unit 100.

[0060] This invention possesses sufficient mechanical strength, stiffness, and stability, ensuring safe and reliable operation, high reusability, and long service life. The temporary support structure for the stiffening chord of this steel truss bridge features rapid installation, low self-weight, high load-bearing strength, adjustable temporary support height as needed, convenient disassembly, and high reuse rate.

[0061] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0064] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0066] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A temporary support frame structure for stiffening chords on a steel truss bridge, characterized in that, The application relates to a support module (1) comprising a plurality of support modules (1) of different heights, which are arranged in sequence from low to high and are detachably connected through a connecting system (2), wherein the support modules (1) of different heights are sequentially composed of a bottom support unit (100), a plurality of variable-height support units (101) and a top support unit (102) from bottom to top, and the height of the top of one side of the top support unit (102) is smaller than the height of the top of the other side. The bottom support unit (100), the variable-height support unit (101) and the top support unit (102) each comprise four vertically arranged and rectangularly arrayed pipe columns (A), the four pipe columns (A) of the variable-height support unit (101) and the top support unit (102) are connected to form a whole, and the pipe columns (A) of adjacent support units are one-to-one corresponding and detachably connected; the heights of the two pipe columns (A) on one side of the top support unit (102) are smaller than the heights of the two pipe columns (A) on the other side, and the tops of the two pipe columns (A) are provided with a distribution beam (3). The column surface of each pipe column (A) of the bottom support unit (100) is uniformly provided with a plurality of first ear plates (B) near the top, the column surface of each pipe column (A) of the variable-height support unit (101) is uniformly provided with a plurality of first ear plates (B) near the top and the bottom, and the column surface of each pipe column (A) of the top support unit (102) is uniformly provided with a plurality of first ear plates (B) near the bottom; the first ear plates (B) on the column surface of the pipe columns (A) of adjacent support units are connected through bolt connection by means of a bolted plate (C). The bottom slope of the bottom support unit (100) is consistent with the slope of the bridge deck plate at the corresponding position.

2. A temporary bracing structure for a stiffening chord of a steel truss bridge according to claim 1, wherein The column surface of each pipe column (A) of the bottom support unit (100) is uniformly provided with a plurality of stiffening plates (D) at the bottom.

3. A temporary bracing structure for a stiffening chord of a steel truss bridge as defined in claim 2, wherein The top of each pipe column (A) of the bottom support unit (100), the bottom and the top of each pipe column (A) of the variable-height support unit (101) and the bottom of each pipe column (A) of the top support unit (102) are provided with end rings (E).

4. A temporary bracing structure for a stiffening chord of a steel truss bridge as defined in claim 1, wherein The top of each pipe column (A) of the top support unit (102) is provided with a bearing platform (F), and the distribution beam (3) is placed on the bearing platform (F).

5. A temporary bracing structure for a stiffening chord of a steel truss bridge as defined in claim 4, wherein The column surface of each pipe column (A) of the top support unit (102) is connected with the corresponding bearing platform (F) through a plurality of stiffening plates (D).

6. A temporary bracing structure for a stiffening chord of a steel truss bridge as defined in claim 1, wherein The connecting system (2) comprises a connecting rod (200) and a second ear plate (201) arranged on the opposite surfaces of adjacent support modules (1), and the second ear plates (201) on the opposite surfaces of adjacent support modules (1) are respectively bolted to the two ends of the connecting rod (200).

7. The construction method of a temporary support frame structure of a stiffening chord of a steel truss bridge according to any one of claims 1 to 6, characterized in that, The application further relates to a method for installing the support module (1) on a steel truss bridge, which comprises the following steps: According to the projection of the upper stiffening chord (4) on the bridge deck plate (5) of the steel truss bridge, the installation position of the support module (1) is marked; In the corresponding installation position, the bottom support unit (100), different numbers of variable height support units (101) and the top support unit (102) are connected in sequence from bottom to top to form support modules (1) with heights arranged in sequence from low to high, so that the top of the top support unit (102) of each support module (1) can be supported on the bottom of the upper stiffening chord (4); A plurality of support modules (1) are detachably connected by a connecting system (2).

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