Steel cross beam connecting structure, combined bridge and construction method

Abstract

The application discloses a steel cross beam connecting structure, a combined bridge and a construction method, and relates to the technical field of bridge structures.The connecting structure comprises a web plate arranged between two longitudinal beams along the transverse direction of the bridge and arranged vertically; a top plate vertically arranged on the top of the web plate, the two ends of the top plate respectively extending into the two longitudinal beams, and a first resistance key arranged at the end of the top plate; a bottom plate vertically arranged on the bottom of the web plate, the two ends of the bottom plate respectively extending into the two longitudinal beams, and a second resistance key arranged at the end of the bottom plate; and a side plate vertically arranged at one end of the web plate and vertically arranged with the top plate and the bottom plate. According to the scheme, the two ends of the top plate and the bottom plate extend into the longitudinal beams, and the resistance keys are arranged at the ends of the top plate and the bottom plate. The connecting strength of the steel cross beam and the longitudinal beam is improved, and the overall structure is beneficial to stress. The compression resistance of the structure is improved by arranging the side plate. The problems of the prior art, such as simple structure, poor structural strength, poor tensile and compression resistance of the steel cross beam connecting structure, are solved.

Description

Technical Field

[0001] This invention relates to the field of bridge structure technology, specifically to a steel crossbeam connection structure, a composite bridge, and a construction method. Background Technology

[0002] The double-sided main girder section consists of two longitudinal beams and a bridge deck. A transverse diaphragm is installed at regular intervals along the longitudinal direction to strengthen the connection between the longitudinal beams and the bridge deck, thereby increasing lateral stiffness and ensuring the overall load-bearing capacity of the main girder. Due to the large bridge deck width, double-sided main girder structures typically employ a combination of concrete main beams and steel transverse diaphragms.

[0003] In existing technologies, steel diaphragms and concrete main beams are connected only by inserting the steel diaphragms into the concrete main beams. This results in a simple connection structure, poor structural strength, and poor tensile and compressive strength. Summary of the Invention

[0004] In view of the deficiencies in the existing technology, the purpose of this invention is to provide a steel crossbeam connection structure, a composite bridge and a construction method, which can solve the problems of simple structure, poor structural strength and poor tensile and compressive performance of the existing steel crossbeam connection structure.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] Firstly, this solution provides a steel crossbeam connection structure, including:

[0007] Web plate, which is used to be installed between two longitudinal beams in the transverse direction of the bridge and is installed vertically;

[0008] A top plate is vertically disposed on the top of the web plate, with two longitudinal beams extending into each end of the top plate, and a first resistance key provided at the end of each beam.

[0009] A base plate is vertically disposed at the bottom of the web, with two longitudinal beams extending into each end of the base plate, and a second resistance key is provided at the end of the base plate;

[0010] The side plate is vertically disposed at one end of the web and is perpendicular to both the top plate and the bottom plate.

[0011] In some alternative embodiments, the first resistance bond includes:

[0012] The first end plate is vertically positioned at the end of the top plate and extends downwards;

[0013] Multiple first ribs are disposed within the angle between the first end plate and the top plate, perpendicularly connected to the first end plate and the top plate, and spaced parallel to each other.

[0014] The second resistance bond includes:

[0015] The second end plate is vertically positioned at the end of the base plate and extends upward.

[0016] Multiple second ribs are disposed within the angle between the second end plate and the bottom plate, perpendicularly connected to the second end plate and the bottom plate, and spaced parallel to each other.

[0017] In some alternative solutions, a first auxiliary pressure plate is arranged parallel to the bottom of the top plate, with one end of the first auxiliary pressure plate connected to the side plate; a second auxiliary pressure plate is arranged parallel to the top of the bottom plate, with one end of the second auxiliary pressure plate connected to the side plate.

[0018] In some alternative embodiments, the top plate and the side plate are provided with a plurality of first pressure diffusion plates perpendicularly connected to the top plate and the side plate at the included angle on one side of the web plate, and the plurality of first pressure diffusion plates are arranged in parallel and spaced apart; the bottom plate and the side plate are provided with a plurality of second pressure diffusion plates perpendicularly connected to the bottom plate and the side plate at the included angle on one side of the web plate, and the plurality of second pressure diffusion plates are arranged in parallel and spaced apart.

[0019] In some alternative designs, the length of the top slab extending into the longitudinal beam is greater than or equal to one-quarter of the longitudinal beam height and less than or equal to one-third of the longitudinal beam height; the length of the bottom slab extending into the longitudinal beam is greater than or equal to one-fifth of the longitudinal beam height and less than or equal to one-quarter of the longitudinal beam height.

[0020] In some alternative designs, the thickness of the first end plate is greater than or equal to the thickness of the top plate and less than or equal to twice the thickness of the top plate; the height of the first end plate is less than one-sixth of the height of the steel transverse beam; the thickness of the first rib is equal to the thickness of the top plate, and the spacing between the first ribs is equal to twice the thickness of the first end plate; the thickness of the second end plate is greater than or equal to the thickness of the bottom plate and less than or equal to twice the thickness of the bottom plate; the height of the second end plate is less than one-sixth of the height of the steel transverse beam; the thickness of the second rib is equal to the thickness of the bottom plate; and the spacing between the second ribs is equal to twice the thickness of the second end plate.

[0021] In some alternative designs, the length of the first auxiliary pressure plate is less than one-twentieth of the web length; the distance between the first auxiliary pressure plate and the top plate is greater than or equal to one-sixth and less than or equal to one-fifth of the height of the steel transverse diaphragm; the length of the second auxiliary pressure plate is greater than one-twentieth and less than or equal to one-tenth of the web length; and the distance between the second auxiliary pressure plate and the bottom plate is greater than or equal to one-sixth and less than or equal to one-fifth of the height of the steel transverse diaphragm.

[0022] In some alternative designs, the thickness of the first pressure diffuser plate is equal to the smaller of the thickness of the top plate and the thickness of the side plate; the height of the first pressure diffuser plate is less than one-sixth of the height of the steel crossbeam; the spacing between the first pressure diffuser plates is equal to twice the thickness of the side plate; the thickness of the second pressure diffuser plate is equal to the smaller of the thickness of the bottom plate and the thickness of the side plate; the height of the second pressure diffuser plate is less than one-sixth of the height of the steel crossbeam; and the spacing between the second pressure diffuser plates is equal to twice the thickness of the bottom plate.

[0023] Secondly, this solution also provides a steel crossbeam composite bridge, including:

[0024] Two longitudinal beams;

[0025] Multiple steel transverse beams are arranged parallel to each other and spaced between two longitudinal beams along the longitudinal direction of the bridge.

[0026] The bridge deck is mounted on top of the two longitudinal beams and multiple steel crossbeams;

[0027] The steel transverse beam includes:

[0028] Web plate, which is used to be installed between two longitudinal beams in the transverse direction of the bridge and is installed vertically;

[0029] A top plate is vertically disposed on the top of the web plate, with two longitudinal beams extending into each end of the top plate, and a first resistance key provided at the end of each beam.

[0030] A base plate is vertically disposed at the bottom of the web, with two longitudinal beams extending into each end of the base plate, and a second resistance key is provided at the end of the base plate;

[0031] The side plate is vertically disposed at one end of the web and is perpendicular to both the top plate and the bottom plate.

[0032] Thirdly, this solution also provides a construction method for a steel diaphragm composite bridge, which is used for the construction of the aforementioned steel diaphragm composite bridge, including:

[0033] Hoist the steel transverse beams to the target position and erect the longitudinal beam formwork;

[0034] Concrete is poured into the formwork of the longitudinal beam to form a concrete longitudinal beam;

[0035] After the concrete has hardened, bridge deck panels will be laid on top of the longitudinal beams and steel transverse beams.

[0036] Compared with existing technologies, the advantages of this invention are as follows: This solution uses an I-beam comprising a web, a top plate, and a bottom plate as the main structure of the steel diaphragm. Both ends of the top and bottom plates extend into the longitudinal beams, and resistance keys are provided at the ends of the top and bottom plates. This improves the connection strength between the steel diaphragm and the longitudinal beams, which is beneficial to the overall structural stress. The addition of side plates enhances the compressive strength of the structure. This solves the problems of simple structure, poor structural strength, and poor tensile and compressive strength in existing steel diaphragm connection structures. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the steel crossbeam connection structure in an embodiment of the present invention;

[0039] Figure 2 As described in the embodiments of the present invention Figure 1 A schematic cross-sectional view along the middle AA section;

[0040] Figure 3 As described in the embodiments of the present invention Figure 1 A schematic cross-sectional view of the middle BB;

[0041] Figure 4 As described in the embodiments of the present invention Figure 2 Enlarged view of point E in the middle;

[0042] Figure 5 As described in the embodiments of the present invention Figure 3 Enlarged view of point F in the middle;

[0043] Figure 6 As described in the embodiments of the present invention Figure 1 Enlarged view of point M in the middle;

[0044] Figure 7 As described in the embodiments of the present invention Figure 1 Enlarged view of point N;

[0045] Figure 8 As described in the embodiments of the present invention Figure 4 A cross-sectional view along the CC axis;

[0046] Figure 9 As described in the embodiments of the present invention Figure 5 A schematic cross-sectional view of the middle DD;

[0047] Figure 10This is a schematic flowchart of the construction method for a steel crossbeam composite bridge in an embodiment of the present invention;

[0048] In the figure: 1. Top plate; 2. Side plate; 3. Bottom plate; 4. Web plate; 5. Longitudinal beam; 61. First end plate; 62. First rib plate; 71. Second end plate; 72. Second rib plate; 8. First auxiliary pressure plate; 9. Second auxiliary pressure plate; 10. First pressure diffusion plate; 11. Second pressure diffusion plate; 12. Bridge deck. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0051] like Figure 1 , Figure 2 and Figure 3 As shown, in a first aspect, the present invention provides a steel crossbeam connection structure, comprising:

[0052] Web plate 4, which is used to be installed between two longitudinal beams 5 in the transverse direction of the bridge and is installed vertically;

[0053] The top plate 1 is vertically set on the top of the web plate 4. Two longitudinal beams 5 extend into the two ends of the top plate 1 respectively, and a first resistance key is set at the end.

[0054] The bottom plate 3 is vertically set at the bottom of the web plate 4. Two longitudinal beams 5 extend into the two ends of the bottom plate 3 respectively, and a second resistance key is provided at the end.

[0055] Side plate 2 is vertically set at one end of web plate 4 and is perpendicular to both top plate 1 and bottom plate 3.

[0056] In this embodiment, the present invention uses an I-beam comprising a web 4, a top plate 1, and a bottom plate 3 as the main structure of the steel diaphragm. The length directions of the top plate 1 and the bottom plate 3 are the same as those of the web 4, and both ends of the top plate 1 and the bottom plate 3 extend into the longitudinal beam 5. Resistance keys are provided at the ends of the top plate 1 and the bottom plate 3. This improves the connection strength between the steel diaphragm and the longitudinal beam 5, which is beneficial to the overall structural stress. The addition of side plates 2 enhances the compressive strength of the structure. This solves the problems of simple structure, poor structural strength, and poor tensile and compressive strength in existing steel diaphragm connection structures.

[0057] like Figures 4-7As shown, in some optional embodiments, the first resistance bond includes:

[0058] The first end plate 61 is vertically disposed at the end of the top plate 1 and extends downward;

[0059] Multiple first ribs 62 are disposed within the angle between the first end plate 61 and the top plate 1, are perpendicularly connected to the first end plate 61 and the top plate 1, and are arranged at parallel intervals.

[0060] The second resistance bond includes:

[0061] The second end plate 71 is vertically disposed at the end of the base plate 3 and extends upward;

[0062] Multiple second ribs 72 are disposed within the angle between the second end plate 71 and the bottom plate 3, are perpendicularly connected to the second end plate 71 and the bottom plate 3, and are arranged at parallel intervals.

[0063] In this embodiment, the first resistance key includes a first end plate 61 and a plurality of first ribs 62, and the second resistance key includes a second end plate 71 and a plurality of second ribs 72. This improves the strength of the steel diaphragm connection structure and the connection strength between the steel diaphragm and the concrete longitudinal beam, resulting in better stress distribution of the overall structure.

[0064] like Figure 1 As shown, in some optional embodiments, a first auxiliary pressure plate 8 is arranged parallel below the top plate 1, and one end of the first auxiliary pressure plate 8 is connected to the side plate 2; a second auxiliary pressure plate 9 is arranged parallel above the bottom plate 3, and one end of the second auxiliary pressure plate 9 is connected to the side plate 2.

[0065] In this embodiment, the compressive strength of the overall structure is improved by setting a first auxiliary pressure plate 8 and a second auxiliary pressure plate 9.

[0066] like Figure 8 and Figure 9 As shown, in some optional embodiments, a plurality of first pressure diffusion plates 10 are provided at the angle between the top plate 1 and the side plate 2 on one side of the web plate 4, which are perpendicularly connected to the top plate 1 and the side plate 2, and the plurality of first pressure diffusion plates 10 are arranged in parallel and spaced apart; a plurality of second pressure diffusion plates 11 are provided at the angle between the bottom plate 3 and the side plate 2 on one side of the web plate 4, which are perpendicularly connected to the bottom plate 3 and the side plate 2, and the plurality of second pressure diffusion plates 11 are arranged in parallel and spaced apart.

[0067] In this embodiment, by setting the first pressure diffuser plate 10 and the second pressure diffuser plate 11, the strength of the steel crossbeam connection structure is improved, and the overall structure is better able to withstand stress.

[0068] In some optional embodiments, the length of the end of the top plate 1 extending into the longitudinal beam 5 is greater than or equal to one-quarter of the height of the longitudinal beam 5 and less than or equal to one-third of the height of the longitudinal beam 5; the length of the end of the bottom plate 3 extending into the longitudinal beam 5 is greater than or equal to one-fifth of the height of the longitudinal beam 5 and less than or equal to one-quarter of the height of the longitudinal beam 5.

[0069] In this embodiment, by limiting the length of the top plate 1 extending into the longitudinal beam 5 and the bottom plate 3 extending into the longitudinal beam 5, the overall structure is made reasonable, saving steel while meeting the stress requirements.

[0070] In some optional embodiments, the thickness of the first end plate 61 is greater than or equal to the thickness of the top plate 1 and less than or equal to twice the thickness of the top plate 1; the height of the first end plate 61 is less than one-sixth of the height of the steel crossbeam; the thickness of the first rib 62 is equal to the thickness of the top plate 1, and the spacing between the first ribs 62 is equal to twice the thickness of the first end plate 61; the thickness of the second end plate 71 is greater than or equal to the thickness of the bottom plate 3 and less than or equal to twice the thickness of the bottom plate 3; the height of the second end plate 71 is less than one-sixth of the height of the steel crossbeam; the thickness of the second rib 72 is equal to the thickness of the bottom plate 3; and the spacing between the second ribs 72 is equal to twice the thickness of the second end plate 71.

[0071] In this embodiment, by limiting the above dimensions, the overall structure is made reasonable, and steel is saved while meeting the stress requirements.

[0072] In some optional embodiments, the length of the first auxiliary pressure plate 8 is less than one-twentieth of the length of the web plate 4; the distance between the first auxiliary pressure plate 8 and the top plate 1 is greater than or equal to one-sixth of the height of the steel transverse diaphragm and less than or equal to one-fifth of the height of the steel transverse diaphragm; the length of the second auxiliary pressure plate 9 is greater than one-twentieth of the length of the web plate 4 and less than or equal to one-tenth of the length of the web plate 4; the distance between the second auxiliary pressure plate 9 and the bottom plate 3 is greater than or equal to one-sixth of the height of the steel transverse diaphragm and less than or equal to one-fifth of the height of the steel transverse diaphragm.

[0073] In this embodiment, by limiting the above dimensions, the overall structure is made reasonable, and steel is saved while meeting the stress requirements.

[0074] In some alternative embodiments, the thickness of the first pressure diffuser plate 10 is equal to the smaller of the thickness of the top plate 1 and the thickness of the side plate 2; the height of the first pressure diffuser plate 10 is less than one-sixth of the height of the steel crossbeam; the spacing between the first pressure diffuser plates 10 is equal to twice the thickness of the side plate 2; the thickness of the second pressure diffuser plate 11 is equal to the smaller of the thickness of the bottom plate 3 and the thickness of the side plate 2; the height of the second pressure diffuser plate 11 is less than one-sixth of the height of the steel crossbeam; and the spacing between the second pressure diffuser plates 11 is equal to twice the thickness of the bottom plate 3.

[0075] In this embodiment, by limiting the above dimensions, the overall structure is made reasonable, and steel is saved while meeting the stress requirements.

[0076] like Figure 1 As shown, in a second aspect, the present invention also provides a steel crossbeam composite bridge, comprising:

[0077] Two longitudinal beams 5;

[0078] Multiple steel transverse beams are arranged parallel to each other along the longitudinal direction of the bridge between two longitudinal beams 5.

[0079] Bridge deck 12, which is set on top of two longitudinal beams 5 and multiple steel transverse beams;

[0080] The steel diaphragm beams include:

[0081] Web plate 4, which is used to be installed between two longitudinal beams 5 in the transverse direction of the bridge and is installed vertically;

[0082] The top plate 1 is vertically set on the top of the web plate 4. Two longitudinal beams 5 extend into the two ends of the top plate 1 respectively, and a first resistance key is set at the end.

[0083] The bottom plate 3 is vertically set at the bottom of the web plate 4. Two longitudinal beams 5 extend into the two ends of the bottom plate 3 respectively, and a second resistance key is provided at the end.

[0084] Side plate 2 is vertically set at one end of web plate 4 and is perpendicular to both top plate 1 and bottom plate 3.

[0085] like Figure 10 As shown, in a third aspect, the present invention also provides a construction method for a steel diaphragm composite bridge, which is used for the above-mentioned construction of a steel diaphragm composite bridge, comprising:

[0086] S1: Hoist the steel crossbeams to the target position and erect the longitudinal beam formwork.

[0087] In this embodiment, after the longitudinal beam formwork is erected, the reinforcing bars are tied.

[0088] S2: Concrete is poured into the longitudinal beam formwork to form a concrete longitudinal beam.

[0089] S3: After the concrete has hardened, the bridge deck is laid on top of the longitudinal beams and steel transverse beams.

[0090] In this embodiment, the bridge is provided with transverse stiffness by connecting the steel transverse beams and the concrete longitudinal beams. The connection has high strength and strong compressive and tensile resistance.

[0091] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0092] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0093] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A steel transverse beam connection structure, characterized in that, include: The web (4) is used to be installed between two longitudinal beams (5) in the transverse direction of the bridge and is installed vertically; The top plate (1) is vertically disposed on the top of the web plate (4), and two longitudinal beams (5) extend into the two ends of the top plate (1) respectively, and a first resistance key is provided at the end; The bottom plate (3) is vertically disposed at the bottom of the web plate (4), and two longitudinal beams (5) extend into the two ends of the bottom plate (3) respectively, and a second resistance key is provided at the end; Side plate (2), which is vertically disposed at one end of the web plate (4) and is perpendicular to both the top plate (1) and the bottom plate (3); A first auxiliary pressure plate (8) is arranged parallel below the top plate (1), and one end of the first auxiliary pressure plate (8) is connected to the side plate (2); a second auxiliary pressure plate (9) is arranged parallel above the bottom plate (3), and one end of the second auxiliary pressure plate (9) is connected to the side plate (2).

2. The steel transverse beam connection structure as described in claim 1, characterized in that, The first resistance bond includes: The first end plate (61) is vertically disposed at the end of the top plate (1) and extends downward; Multiple first ribs (62) are arranged within the angle between the first end plate (61) and the top plate (1), perpendicularly connected to the first end plate (61) and the top plate (1), and arranged at parallel intervals. The second resistance bond includes: The second end plate (71) is vertically disposed at the end of the base plate (3) and extends upward; Multiple second ribs (72) are arranged within the angle between the second end plate (71) and the bottom plate (3), are perpendicularly connected to the second end plate (71) and the bottom plate (3), and are arranged at parallel intervals.

3. The steel transverse beam connection structure as described in claim 1, characterized in that, The top plate (1) and the side plate (2) are provided with a plurality of first pressure diffusion plates (10) perpendicularly connected to the top plate (1) and the side plate (2) at the included angle on one side of the web plate (4), and the plurality of first pressure diffusion plates (10) are arranged in parallel and spaced apart; the bottom plate (3) and the side plate (2) are provided with a plurality of second pressure diffusion plates (11) perpendicularly connected to the bottom plate (3) and the side plate (2) at the included angle on one side of the web plate (4), and the plurality of second pressure diffusion plates (11) are arranged in parallel and spaced apart.

4. The steel transverse beam connection structure as described in claim 1, characterized in that, The length of the end of the top plate (1) extending into the longitudinal beam (5) is greater than or equal to one-quarter of the height of the longitudinal beam (5) and less than or equal to one-third of the height of the longitudinal beam (5); the length of the end of the bottom plate (3) extending into the longitudinal beam (5) is greater than or equal to one-fifth of the height of the longitudinal beam (5) and less than or equal to one-quarter of the height of the longitudinal beam (5).

5. The steel transverse beam connection structure as described in claim 2, characterized in that, The thickness of the first end plate (61) is greater than or equal to the thickness of the top plate (1) and less than or equal to twice the thickness of the top plate (1); the height of the first end plate (61) is less than one-sixth of the height of the steel crossbeam; the thickness of the first rib plate (62) is equal to the thickness of the top plate (1), and the spacing between the first rib plates (62) is equal to twice the thickness of the first end plate (61); the thickness of the second end plate (71) is greater than or equal to the thickness of the bottom plate (3) and less than or equal to twice the thickness of the bottom plate (3); the height of the second end plate (71) is less than one-sixth of the height of the steel crossbeam; the thickness of the second rib plate (72) is equal to the thickness of the bottom plate (3); the spacing between the second rib plates (72) is equal to twice the thickness of the second end plate (71).

6. The steel transverse beam connection structure as described in claim 1, characterized in that, The length of the first auxiliary pressure plate (8) is less than one-twentieth of the length of the web plate (4); the distance between the first auxiliary pressure plate (8) and the top plate (1) is greater than or equal to one-sixth of the height of the steel crossbeam and less than or equal to one-fifth of the height of the steel crossbeam; the length of the second auxiliary pressure plate (9) is greater than one-twentieth of the length of the web plate (4) and less than or equal to one-tenth of the length of the web plate (4); the distance between the second auxiliary pressure plate (9) and the bottom plate (3) is greater than or equal to one-sixth of the height of the steel crossbeam and less than or equal to one-fifth of the height of the steel crossbeam.

7. The steel transverse beam connection structure as described in claim 3, characterized in that, The thickness of the first pressure diffuser plate (10) is equal to the smaller of the thickness of the top plate (1) and the thickness of the side plate (2); the height of the first pressure diffuser plate (10) is less than one-sixth of the height of the steel crossbeam; the spacing between the first pressure diffuser plates (10) is equal to twice the thickness of the side plate (2); the thickness of the second pressure diffuser plate (11) is equal to the smaller of the thickness of the bottom plate (3) and the thickness of the side plate (2); the height of the second pressure diffuser plate (11) is less than one-sixth of the height of the steel crossbeam; the spacing between the second pressure diffuser plates (11) is equal to twice the thickness of the bottom plate (3).

8. A steel crossbeam composite bridge, characterized in that, include: Two longitudinal beams (5); Multiple steel transverse beams are arranged parallel to each other along the longitudinal direction between two longitudinal beams (5); Bridge deck (12), which is set on top of the two longitudinal beams (5) and multiple steel crossbeams; The steel transverse beam includes: The web (4) is used to be installed between two longitudinal beams (5) in the transverse direction of the bridge and is installed vertically; The top plate (1) is vertically disposed on the top of the web plate (4), and two longitudinal beams (5) extend into the two ends of the top plate (1) respectively, and a first resistance key is provided at the end; The bottom plate (3) is vertically disposed at the bottom of the web plate (4), and two longitudinal beams (5) extend into the two ends of the bottom plate (3) respectively, and a second resistance key is provided at the end; Side plate (2), which is vertically disposed at one end of the web plate (4) and is perpendicular to both the top plate (1) and the bottom plate (3); A first auxiliary pressure plate (8) is arranged parallel below the top plate (1), and one end of the first auxiliary pressure plate (8) is connected to the side plate (2); a second auxiliary pressure plate (9) is arranged parallel above the bottom plate (3), and one end of the second auxiliary pressure plate (9) is connected to the side plate (2).

9. A construction method for a steel crossbeam composite bridge, characterized in that, It is used in the construction of the steel crossbeam composite bridge as described in claim 8, comprising: Hoist the steel transverse beams to the target position and erect the longitudinal beam formwork; Concrete is poured into the formwork of the longitudinal beam to form a concrete longitudinal beam; After the concrete has hardened, bridge deck panels will be laid on top of the longitudinal beams and steel transverse beams.

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