Triangular truss type bridge structure

Abstract

The invention discloses a triangular truss type bridge structure which comprises upper chords and lower chords, the upper chords and the lower chords are pipe section components, the number of the lower chords is two, the upper chords are parallel to the lower chords, and the upper chords and the two lower chords are distributed in a triangular mode. The end points of the diagonal web members are average segmentation points of the lower chord member and the upper chord member according to the length, and the pipe section members are arranged according to mutual connecting lines of the segmentation points to form the diagonal web members; the plurality of lower chord cross beams are arranged corresponding to the average segmentation points of the lower chords and are used for connecting the two lower chords; the first support joint and the second support joint are arranged at the two ends of the lower chord member respectively and used for being connected with an external support so as to transmit force borne by the structure in the vertical direction and the horizontal direction. The triangular truss type bridge structure has the advantages of being high in lateral stability, convenient and fast to install, high in bearing capacity and small in steel consumption.

Description

Technical Field

[0001] The invention relates to a triangular truss type bridge structure, belonging to the technical field of pipeline bridges. Background Art

[0002] In industrial projects, in order to efficiently utilize limited space resources and meet growing production needs, using the space above rivers to lay pipelines has become a common solution.

[0003] In order to support the pipelines above the river, a bridge across the river is usually used as a supporting structure. Conventional bridges currently mostly use rectangular tube trusses, and the rods are mostly made of steel sections, which have many shortcomings: poor lateral stability, difficult installation, inconvenient welding, complex rod force, high steel consumption, heavy weight and uneconomical.

[0004] Therefore, a new structural form is needed that can provide a bridge structure with strong lateral stability, convenient installation, high bearing capacity and low steel consumption. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the existing river-spanning bridge frames are mostly rectangular tube trusses, and the rods are mostly made of steel sections, which have poor lateral stability, great difficulty in installation, inconvenient welding, complex rod force, high steel consumption, heavy weight and uneconomical problems.

[0006] In order to solve the above technical problems, the present invention provides a triangular truss bridge structure, which has the characteristics of strong lateral stability, convenient installation, strong bearing capacity and small amount of steel.

[0007] In order to achieve the above technical objectives and the above technical effects, this application is implemented through the following technical solutions:

[0008] A triangular truss bridge structure, comprising an upper chord and a lower chord, both of which are tubular cross-section members, two lower chords are arranged in parallel, the upper chord is arranged parallel to the lower chord and is distributed in a triangular shape with the two lower chords;

[0009] The diagonal web member has its endpoints at the average length segmentation points of the lower chord and the upper chord, and the pipe section components are arranged according to the interconnection lines of the segmentation points to form the diagonal web member;

[0010] A plurality of lower chord cross beams are provided corresponding to the average segmentation points of the lower chord bars, and are used to connect the two lower chord bars;

[0011] Support node 1 and support node 2 are located at both ends of the lower chord and are used to connect external supports to transfer the vertical and horizontal forces acting on the structure.

[0012] Preferably, the support node 1 includes an upper pad 1, a stiffening plate 1, a partition 1, a lower channel steel 1, a lower pad 1, a connecting angle steel and connecting bolts, the upper pad 1 is fixedly connected to the lower chord, the side of the upper pad 1 facing away from the lower chord is fixedly connected to the stiffening plate 1 and the partition 1, the side of the stiffening plate 1 and the partition 1 facing away from the upper pad 1 is fixedly connected to the channel body of the lower channel steel 1, the lower pad 1 is fixedly connected to the bottom of the lower channel steel 1 for connecting external support, and the connecting angle steel is fixedly connected to one side wall of the lower channel steel by a plurality of the connecting bolts.

[0013] Furthermore, the connecting angle steel is provided with a plurality of oblong holes for the connecting bolts to pass through.

[0014] Preferably, the support node two includes an upper pad two, a stiffening plate two, a partition two, a lower channel steel two and a lower pad two, the upper pad two is fixedly connected to the lower chord, the side of the upper pad two facing away from the lower chord is fixedly connected to the stiffening plate two and the partition two, the side of the stiffening plate two and the partition two facing away from the upper pad two is fixedly connected to the channel body of the lower channel steel two, and the lower pad two is fixedly connected to the bottom of the lower channel steel one for connecting external support.

[0015] Preferably, the upper chord and the lower chord are evenly segmented with a length L, the length of the lower chord is longer than the length of the upper chord by an average segment length L, and the horizontal distance between the end of the upper chord and the end of the lower chord is L / 2.

[0016] Preferably, the lower chord cross beam includes a connecting pipe and a connecting channel steel, both ends of the connecting pipe and the connecting channel steel are fixedly connected to the corresponding lower chord rod, and the connecting channel steel channel body is arranged away from the upper chord rod and buckled on the connecting pipe.

[0017] Preferably, the support node 1 and the support node 2 are both fillet welded structures.

[0018] The triangular truss bridge structure provided by the present invention has the following advantages:

[0019] The triangular truss bridge structure of the present invention adopts a spatial triangular structure with reasonable and economical design; the closed triangular structure has good bidirectional stress conditions and good stability, and at the same time has the characteristics of easy installation, strong bearing capacity, low steel consumption and little impact on the passage of the river below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the relationship between bridge-pipeline-support-river provided in an embodiment of the present invention;

[0021] Figure 2 An axial schematic diagram of a triangular truss bridge structure provided by an embodiment of the present invention;

[0022] Figure 3 A top view of a triangular truss bridge structure provided by an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the structure of the lower chord beam provided in an embodiment of the present invention;

[0024] Figure 5 A structural schematic diagram of a support node provided in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the installation structure that mainly reflects the connection relationship between the support node 1 and the lower chord in an embodiment of the present invention;

[0026] Figure 7 A schematic diagram of the structure of a support node 2 provided in an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the installation structure that mainly reflects the connection relationship between the support node 2 and the lower chord rod in an embodiment of the present invention;

[0028] In the figure:

[0029] 1-triangular truss bridge; 2-support; 3-river; 4-pipeline;

[0030] 100-upper chord; 200-lower chord; 300-diagonal web; 400-lower chord cross beam; 401-connecting pipe; 402-connecting channel steel; 500-support node one; 501-upper pad one; 502-stiffening plate one; 503-partition one; 504-lower channel steel one; 505-lower pad one; 506-connecting angle steel; 5061-long round hole; 507-connecting bolt; 600-support node two; 601-upper pad two; 602-stiffening plate two; 603-partition two; 604-lower channel steel two; 605-lower pad two. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technical personnel in this field without making creative work are within the scope of protection of the present invention.

[0032] Reference Figure 1-Figure 4A triangular truss bridge structure includes an upper chord 100 and a lower chord 200, both of which are tubular cross-section components and are arranged parallel to each other. The lower chord 200 is provided with two supports 2 for defining the height of a pipeline 4, and the upper chord 100 is provided with one support located above the middle line of the two lower chords 200. The spacing between the two lower chords 200 and the height of the upper chord 100 are calculated according to the pipeline 4 carried. The cross-sections of the upper chord 100 and the lower chord 200 adopt different pipe diameters and wall thicknesses according to different forces. The lower chord 200 and the upper chord 100 are divided into sections at average lengths, and the tubular cross-section components are arranged according to the interconnecting lines of the section points to form the diagonal web members of the triangular truss.

[0033] Furthermore, the triangular truss bridge structure also includes a lower chord crossbeam 400, and a plurality of lower chord crossbeams 400 are arranged corresponding to the average segmentation points of the lower chord rods 200, for connecting the two lower chord rods 200. Specifically, the lower chord crossbeam 400 is composed of a connecting pipe 401 and a connecting channel steel 402. The connecting line of the segmentation points between the lower chord rods 200 is perpendicular to the chord rod to form a connecting pipe 401. The opening of the connecting channel steel 402 is buckled downward on the connecting pipe 401. Both ends of the connecting pipe 401 and the connecting channel steel 402 are welded and fixed to the corresponding lower chord rods 200. The side of the connecting channel steel 402 facing away from the connecting pipe 401 forms the supporting 2 surfaces of the pipeline 4. The lower chord crossbeam 400 is a part that mainly bears the weight of the pipeline 4.

[0034] Furthermore, the cross-sections of the upper chord 100, the lower chord 200, the diagonal web and the connecting pipe 401 are all steel pipes, and all the steel pipes are treated with head welding plates. In order to avoid the steel pipe welding nodes, the two ends of the upper chord 100 and the lower chord 200 are respectively extended a little to make end plate nodes. Specifically, the upper chord 100 and the lower chord 200 are evenly divided into sections, and the length of each section is set to L. The lower chord 200 is divided into n parts, and the upper chord 100 is divided into n-1 parts. The length of the upper chord 100 is smaller than that of the lower chord 200 by a section length L. The end of the upper chord 100 is L / 2 away from the end of the lower chord 200. In this example, the two ends of the chord need to be extended by 200 mm respectively. The component form of the triangular truss is a closed form, and the design is both reasonable and economical. The closed triangular structure has good bidirectional force conditions and good stability.

[0035] Reference Figure 1-Figure 8 A triangular truss bridge structure also includes a support node 500 and a support node 600. The support node 500 and the support node 600 are respectively arranged at both ends of the lower chord 200 for connecting the external support 2 to transfer the vertical and horizontal forces of the pipeline 4 exerted on the structure.

[0036] The support node 500 includes an upper pad 501, a stiffening plate 502, a partition 503, a lower channel steel 504, a lower pad 505, a connecting angle steel 506 and a connecting bolt 507. The upper pad 501 is welded to the lower chord 200 by a fillet weld. The side of the upper pad 501 away from the lower chord 200 is welded to the stiffening plate 502 and the partition 503 by a fillet weld. The stiffening plate 502 and the partition 503 are perpendicularly arranged to each other for transmitting vertical and horizontal forces. The stiffening plate 502 and the partition 503 are connected to the lower chord 200 by a fillet weld. The fillet weld on the side of 503 facing away from the upper pad 501 is welded in the channel body of the lower channel steel 504. The lower pad 505 is welded and fixed to the bottom of the lower channel steel 504 for connecting the external support 2. The connecting angle steel 506 is fixedly connected to the side wall of the lower channel steel 504 by multiple connecting bolts 507. The connecting angle steel 506 is provided with multiple oblong holes 5061 for the connecting bolts 507 to pass through, so as to bear the lateral load conveniently. During actual installation, the lower pad 505 and the connecting angle steel 506 are welded to the external support 2 with fillet welds.

[0037] The support node 2 600 includes an upper pad 2 601, a stiffening plate 2 602, a partition 2 603, a lower channel steel 2 604 and a lower pad 2 605. The upper pad 2 601 is welded to the lower chord 200 by a fillet weld. The side of the upper pad 2 601 facing away from the lower chord 200 is welded to the stiffening plate 2 602 and the partition 2 603 by a fillet weld. The stiffening plate 1 502 and the partition 1 503 are arranged perpendicular to each other for transmitting vertical and horizontal forces. The side of the stiffening plate 2 602 and the partition 2 603 facing away from the upper pad 2 601 is welded to the groove body of the lower channel steel 2 604 by a fillet weld. The lower pad 2 605 is welded and fixed to the bottom of the lower channel steel 1 504 for connecting the external support 2. During actual installation, the lower pad 2 605 is welded to the external support 2 by a fillet weld.

[0038] Reference Figure 1 , which is a schematic diagram of the relationship between the bridge frame, support and river provided in an embodiment of the present invention. It should be understood that it only illustrates the relationship between the bridge frame, support 2 and river 3, and does not describe in detail the specific details of the present invention, such as the cross-sectional form and node method. The triangular truss bridge frame 1 is arranged above the river 3, and the two ends are supported on the supports 2 on both sides of the river 3. The pipeline 4 passes through the middle of the triangular truss bridge frame 1; due to the use of pipe sections, its deadweight is lighter than that of traditional bridge frames, and it is also convenient to hoist. The on-site welding workload of the support is small, and it can be easily installed.

[0039] The above is only a preferred embodiment of the present invention, and is not any formal or substantial limitation of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be regarded as the protection scope of the present invention. Any technician familiar with this profession, without departing from the spirit and scope of the present invention, can make some changes, modifications and equivalent changes made by using the technical content disclosed above, which are equivalent embodiments of the present invention; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A triangular truss bridge structure, characterized in that: The invention comprises an upper chord rod (100) and a lower chord rod (200), wherein the upper chord rod (100) and the lower chord rod (200) are both tubular cross-section components, two lower chord rods (200) are arranged in parallel, the upper chord rod (100) is arranged in parallel with the lower chord rod (200) and is distributed in a triangle with the two lower chord rods (200); A diagonal web member (300), wherein the end points of the diagonal web member (300) are respectively the average segmentation points of the lower chord member (200) and the upper chord member (100) according to their lengths, and the pipe section components are arranged according to the mutual connection lines of the segmentation points to form the diagonal web member (300); a plurality of lower chord cross beams (400) are arranged corresponding to the average segmentation points of the lower chord member (200) and are used to connect the two lower chord members (200); Support node one (500) and support node two (600) are respectively arranged at two ends of the lower chord (200) for connecting the external support (2) to transmit the vertical and horizontal forces exerted on the structure.

2. A triangular truss bridge structure according to claim 1, characterized in that: The support node 1 (500) comprises an upper pad 1 (501), a stiffening plate 1 (502), a partition 1 (503), a lower channel steel 1 (504), a lower pad 1 (505), a connecting angle steel (506) and a connecting bolt (507), wherein the upper pad 1 (501) is fixedly connected to the lower chord (200), and the side of the upper pad 1 (501) facing away from the lower chord (200) is fixedly connected to the stiffening plate 1 (50 2) and a partition plate (503), the side of the stiffening plate (502) and the partition plate (503) facing away from the upper pad plate (501) is fixedly connected to the lower channel steel (504) channel body, the lower pad plate (505) is fixedly connected to the bottom of the lower channel steel (504) for connecting to the external support (2), and the connecting angle steel (506) is fixedly connected to the side wall of the lower channel steel (504) by a plurality of connecting bolts (507).

3. A triangular truss bridge structure as claimed in claim 2, characterized in that: The connecting angle steel (506) is provided with a plurality of oblong holes (5061) for the connecting bolts (507) to pass through.

4. A triangular truss bridge structure as claimed in claim 1, characterized in that: The support node 2 (600) comprises an upper pad 2 (601), a stiffening plate 2 (602), a partition 2 (603), a lower channel steel 2 (604) and a lower pad 2 (605), wherein the upper pad 2 (601) is fixedly connected to the lower chord (200), the side of the upper pad 2 (601) facing away from the lower chord (200) is fixedly connected to the stiffening plate 2 (602) and the partition 2 (603), the side of the stiffening plate 2 (602) and the partition 2 (603) facing away from the upper pad 2 (601) is fixedly connected to the channel body of the lower channel steel 2 (604), and the lower pad 2 (605) is fixedly connected to the bottom of the lower channel steel 1 (504) for connecting to an external support (2).

5. The triangular truss bridge structure according to claim 1, characterized in that: The upper chord (100) and the lower chord (200) are evenly segmented with a length L, the length of the lower chord (200) is longer than the length of the upper chord (100) by an average segment length L, and the distance between the end of the upper chord (100) and the end of the lower chord (200) in the horizontal direction is L / 2.

6. The triangular truss bridge structure according to claim 1, characterized in that: The lower chord cross beam (400) comprises a connecting pipe (401) and a connecting channel steel (402), both ends of the connecting pipe (401) and the connecting channel steel (402) are fixedly connected to the corresponding lower chord rod (200), and the channel body of the connecting channel steel (402) is arranged away from the upper chord rod (100) and is buckled on the connecting pipe (401).

7. The triangular truss bridge structure according to claim 1, characterized in that: The support node one (500) and the support node two (600) are both fillet welded structures.

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