Full-fabricated steel plate composite beam structure and construction method

Abstract

The invention relates to a full-fabricated steel plate composite beam structure and a construction method, and belongs to the technical field of composite beam construction and production. Multiple sets of steel beam webs are arranged below the cast-in-place bridge deck at intervals, the upper portions of the steel beam webs are embedded in the cast-in-place bridge deck, steel beam bottom plates are perpendicularly welded to the bottom ends of the steel beam webs, and left reinforcing plates and right reinforcing plates are installed on the upper portions of the steel beam webs through reinforcing plate fixing pieces. The left reinforcing plate and the right reinforcing plate are located on the two sides of the steel beam web respectively, and the lower-layer embedded steel bar penetrates through the steel beam web, the left reinforcing plate and the right reinforcing plate. The reinforcing structure has the following beneficial effects that the left reinforcing plate and the right reinforcing plate are installed on the steel beam web through the reinforcing plate fixing pieces, the lower-layer embedded steel bars penetrate through the steel beam web, the left reinforcing plate and the right reinforcing plate, and the overall performance of the structure is further enhanced; the phenomenon that the overall rigidity of the structure is degraded due to slippage between the bridge deck slab and the steel beam is avoided, and the overall performance of the structure is remarkably improved.

Description

Technical Field

[0001] The invention relates to a fully assembled steel plate composite beam structure and a construction method, belonging to the technical field of composite beam construction and production. Background Art

[0002] The steel plate composite beam structure is a new type of structure composed of two materials with different properties: I-shaped steel plate beam and concrete bridge deck. It gives full play to the advantages of high tensile strength and good plasticity of steel and good compressive performance of concrete, and makes up for their respective shortcomings.

[0003] However, current technologies are incomplete and suffer from the following drawbacks: Commonly used composite structural systems often require manual welding of shear connectors, resulting in a low level of industrialization. Furthermore, traditional composite structural systems require pre-reserved slots for shear members in the bridge deck, followed by on-site concrete pouring. This can lead to slippage between the deck and steel beams, resulting in a loss of overall structural rigidity and requiring significant on-site work.

[0004] In order to solve one of the above problems, a fully assembled steel plate composite beam structure and construction method are urgently needed. Summary of the Invention

[0005] In view of the above deficiencies in the prior art, the technical problem to be solved by the present invention is: how to install the left reinforcement plate and the right reinforcement plate on the web of the steel beam through the reinforcement plate fixing parts, and the lower layer of embedded steel bars passes through the web of the steel beam, the left reinforcement plate and the right reinforcement plate, so that the overall performance of the structure is further enhanced, avoiding the phenomenon of overall structural stiffness degradation due to slippage between the bridge deck and the steel beam, and significantly improving the overall performance of this type of structure. For this purpose, a fully assembled steel plate composite beam structure and construction method are provided.

[0006] The fully assembled steel plate composite beam structure described in the present invention includes a cast-in-place bridge deck, and is characterized in that: a plurality of groups of steel beam webs are arranged at intervals below the cast-in-place bridge deck, the upper part of the steel beam webs is embedded in the cast-in-place bridge deck, and the bottom end of the steel beam web is vertically welded with a steel beam bottom plate. The cast-in-place bridge deck is also provided with an upper layer of embedded steel bars and a lower layer of embedded steel bars. The upper part of the steel beam web is installed with a left reinforcing plate and a right reinforcing plate through a reinforcing plate fixing piece. The left reinforcing plate and the right reinforcing plate are respectively located on both sides of the steel beam web, and the lower layer of embedded steel bars passes through the steel beam web, the left reinforcing plate and the right reinforcing plate.

[0007] The cast-in-place bridge deck, upper embedded steel bars, lower embedded steel bars and steel beam web work together to give full play to the resistance of the bridge deck during the construction phase, improve material utilization, and enhance the economic performance of the steel-concrete composite structure; in addition, the left and right reinforcing plates are installed on the steel beam web through the reinforcing plate fixings, and the lower embedded steel bars pass through the steel beam web, the left and right reinforcing plates, which further enhances the overall performance of the structure, avoids the phenomenon of overall structural stiffness degradation due to slippage between the bridge deck and the steel beam, and significantly improves the overall performance of this type of structure.

[0008] In any of the above schemes, it is preferred that the reinforcement plate fixing member includes a left-side fixed pipe fitting and a right-side fixed pipe fitting arranged along the length direction of the steel beam web, the left-side fixed pipe fitting and the right-side fixed pipe fitting are respectively located on both sides of the steel beam web, the left-side fixed pipe fitting and the right-side fixed pipe fitting are connected to the steel beam web through a main connecting member, the steel beam web is clamped between the left-side fixed pipe fitting and the right-side fixed pipe fitting, and the left reinforcement plate and the right reinforcement plate are respectively fixed on the left-side fixed pipe fitting and the right-side fixed pipe fitting.

[0009] The assembly operation is convenient, no on-site welding is required, and there is no need to excessively open assembly holes on the web of the steel beam, thus maintaining high assembly strength.

[0010] In any of the above solutions, preferably, the left-side fixed pipe has a rectangular cross-section and includes sequentially connected pipe walls A, B, C, and D, with pipe wall A and C arranged opposite each other, and pipe wall B and D arranged opposite each other. The right-side fixed pipe has a rectangular cross-section and includes sequentially connected pipe walls E, F, G, and H, with pipe wall E and G arranged opposite each other, and pipe wall F and H arranged opposite each other. This has greater resistance to bending and torsional forces, can significantly reduce structural weight, and save steel.

[0011] In any of the above solutions, preferably, the main connecting member includes a main connecting bolt, the bolt body of which sequentially passes through the first pad, pipe wall F, steel beam web, pipe wall D, and second pad, and is threadedly connected to the main connecting nut. The first pad and second pad are respectively located in the right and left fixed pipe fittings, fixing the left and right fixed pipe fittings to the steel beam web. The left and right fixed pipe fittings are respectively provided with an operating square hole A and an operating square hole B that match the position of the corresponding main connecting member. On-site construction is more convenient, quick, and safe, and has broad application prospects and development potential.

[0012] In any of the above schemes, it is preferred that the bottom of the left reinforcement plate is vertically connected to a horizontal connecting plate A, the upper surface of the tube wall A is connected to a horizontal connecting plate B through the vertical connecting plate A, and the horizontal connecting plate B is detachably connected to the horizontal connecting plate A through the connecting bolt assembly A.

[0013] In any of the above schemes, it is preferred that the bottom of the right reinforcement plate is vertically connected to a horizontal connecting plate C, the upper surface of the tube wall E is connected to a horizontal connecting plate D through a vertical connecting plate B, and the horizontal connecting plate D is detachably connected to the horizontal connecting plate C through a connecting bolt assembly B.

[0014] In any of the above schemes, it is preferred that the main connecting bolts are arranged in multiple groups along the length direction of the steel beam web, and the multiple groups of main connecting bolts are arranged at equal intervals, the operating square holes A are arranged in multiple groups along the length square of the left fixed pipe fitting, and the positions are adapted to the positions of the main connecting bolts; the operating square holes B are arranged in multiple groups along the length square of the right fixed pipe fitting, and the positions are adapted to the positions of the main connecting bolts.

[0015] In any of the above schemes, it is preferred that a plurality of groups of inter-web reinforcements are provided between adjacent webs of the steel beams, and the plurality of groups of inter-web reinforcements are arranged at equal intervals.

[0016] In any of the above schemes, it is preferred that the inter-web reinforcement includes a connecting shaft middle section, a connecting shaft front section and a connecting shaft tail section, and the two ends of the connecting shaft middle section are respectively provided with a front plug joint and a rear plug joint, the front plug joint is embedded in the plug slot A, and the front plug joint is connected to the connecting shaft front section through the connecting bolt assembly C, the rear plug joint is embedded in the plug slot B, and the rear plug joint is connected to the connecting shaft tail section through the connecting bolt assembly D, and the ends of the connecting shaft front section and the connecting shaft tail section are respectively provided with an end connecting bolt B and an end connecting bolt A connected to the corresponding steel beam web.

[0017] The adjacent steel beam webs are connected as a whole through inter-web reinforcements, thereby improving the structural strength of the cast-in-place bridge deck and steel beam webs.

[0018] The present invention also discloses a construction method for a fully assembled steel plate composite beam structure, which is characterized by comprising the following steps: first, prefabricating an assembly of a steel beam web and a steel beam bottom plate, as well as upper embedded steel bars, lower embedded steel bars, a left reinforcing plate, and a right reinforcing plate in a factory; Then, a casting template for the cast-in-place bridge deck is constructed, and the upper embedded steel bars, lower embedded steel bars, steel beam web, left reinforcing plate, and right reinforcing plate are installed in corresponding reserved positions; Then, concrete is poured into the bridge deck casting formwork to form a cast-in-place bridge deck. After the concrete solidifies, the bridge deck casting formwork is removed. Secondly, assemble the reinforcement plate fixings on the steel beam web, and then connect the steel beam web with the left reinforcement plate and the right reinforcement plate; Finally, inter-web reinforcements are installed between adjacent steel beam webs.

[0019] Compared with the prior art, the present invention has the following beneficial effects: In the fully assembled steel plate composite beam structure described in the present invention, the cast-in-place bridge deck, the upper embedded steel bars, the lower embedded steel bars and the steel beam web work together to give full play to the resistance of the bridge deck during the construction phase, improve the material utilization rate, and enhance the economic performance of the steel-concrete composite structure; in addition, the left and right reinforcing plates are installed on the steel beam web through the reinforcing plate fixing parts, and the lower embedded steel bars pass through the steel beam web, the left and right reinforcing plates, thereby further enhancing the overall performance of the structure, avoiding the phenomenon of overall structural stiffness degradation due to slippage between the bridge deck and the steel beam, and significantly improving the overall performance of this type of structure.

[0020] The fully assembled steel plate composite beam structure described in the present invention has the following features: the left-side fixed pipe fitting and the right-side fixed pipe fitting are connected to the steel beam web through a main connecting piece; the steel beam web is clamped between the left-side fixed pipe fitting and the right-side fixed pipe fitting; the left-side reinforcing plate and the right-side reinforcing plate are respectively fixed on the left-side fixed pipe fitting and the right-side fixed pipe fitting; the assembly operation is convenient, no on-site welding is required, and no excessive assembly holes need to be opened on the steel beam web, thereby maintaining high assembly strength.

[0021] In the fully assembled steel plate composite beam structure described in the present invention, the rear plug-in connector is embedded in the plug-in slot B, and is connected to the rear section of the connecting shaft by a connecting bolt assembly D. The ends of the front section and the rear section of the connecting shaft are respectively provided with end connecting bolts B and end connecting bolts A connected to the corresponding steel beam webs. The adjacent steel beam webs are connected as a whole by inter-web reinforcements, thereby improving the structural strength of the cast-in-place bridge deck and the steel beam webs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0023] Figure 1 The structure of the present invention is schematically shown Figure 1 ; Figure 2 The structure diagram of the reinforcing plate fixing member of the present invention is shown in FIG. Figure 1 ; Figure 3 The structure diagram of the reinforcing plate fixing member of the present invention is shown in FIG. Figure 2 ; Figure 4 The structure of the present invention is schematically shown Figure 2 ; Figure 5 Schematic diagram of the structure of the inter-web reinforcement.

[0024] In the figure: 1. Cast-in-place bridge deck 2. Steel beam web 3. Upper embedded steel bars 4. Lower embedded steel bars 5. Steel beam bottom plate 6. Reinforcement plate fixings 7. Left reinforcement plate 7.1. Horizontal connecting plate A 7.2. Vertical connecting plate A 7.3. Horizontal connecting plate B 7.4. Connecting bolt assembly A 8. Right reinforcement plate 8.1. Horizontal connecting plate C 8.2. Vertical connecting plate B 8.3. Horizontal connecting plate D 8.4. Connecting bolt assembly B 9. Left fixing fitting 9.1. Operating square hole A 10. Right fixing fitting 10.1. Operating square hole B 11. Main connecting bolt 12. First washer 13. Second washer 14. Main connecting nut 15. Connecting shaft middle section 16. End connecting bolt A 17. End connecting bolt B 18. Connecting shaft front section 19. Connecting shaft rear section 20. Front plug connector 21. Connecting slot A 22. Connecting bolt assembly C 23. Rear connector 24. Connecting slot B 25. Connecting bolt assembly D. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings: The present invention will be further illustrated below through specific embodiments, but the present invention is not limited thereto. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0026] Example 1, as Figure 1-2 As shown, a fully assembled steel plate composite beam structure includes a cast-in-place bridge deck 1, and a plurality of groups of steel beam webs 2 are arranged at intervals below the cast-in-place bridge deck 1. The upper part of the steel beam web 2 is embedded in the cast-in-place bridge deck 1, and the bottom end of the steel beam web 2 is vertically welded with a steel beam bottom plate 5. The cast-in-place bridge deck 1 is also provided with an upper embedded steel bar 3 and a lower embedded steel bar 4. The upper part of the steel beam web 2 is installed with a left reinforcing plate 7 and a right reinforcing plate 8 through a reinforcing plate fixing part 6. The left reinforcing plate 7 and the right reinforcing plate 8 are respectively located on both sides of the steel beam web 2, and the lower embedded steel bar 4 passes through the steel beam web 2, the left reinforcing plate 7 and the right reinforcing plate 8.

[0027] The cast-in-place bridge deck 1, the upper embedded steel bars 3, the lower embedded steel bars 4 and the steel beam web 2 work together to give full play to the resistance of the bridge deck during the construction phase, improve material utilization, and enhance the economic performance of the steel-concrete composite structure; in addition, the left reinforcing plate 7 and the right reinforcing plate 8 are installed on the steel beam web 2 through the reinforcing plate fixing parts 6, and the lower embedded steel bars 4 pass through the steel beam web 2, the left reinforcing plate 7 and the right reinforcing plate 8, so that the overall performance of the structure is further enhanced, avoiding the phenomenon of overall structural stiffness degradation due to slippage between the bridge deck and the steel beam, and significantly improving the overall performance of this type of structure.

[0028] Example 2, as Figure 1-3 As shown, a fully assembled steel plate composite beam structure includes a cast-in-place bridge deck 1, and a plurality of groups of steel beam webs 2 are arranged at intervals below the cast-in-place bridge deck 1. The upper part of the steel beam web 2 is embedded in the cast-in-place bridge deck 1, and the bottom end of the steel beam web 2 is vertically welded with a steel beam bottom plate 5. The cast-in-place bridge deck 1 is also provided with an upper embedded steel bar 3 and a lower embedded steel bar 4. The upper part of the steel beam web 2 is installed with a left reinforcing plate 7 and a right reinforcing plate 8 through a reinforcing plate fixing part 6. The left reinforcing plate 7 and the right reinforcing plate 8 are respectively located on both sides of the steel beam web 2, and the lower embedded steel bar 4 passes through the steel beam web 2, the left reinforcing plate 7 and the right reinforcing plate 8.

[0029] Furthermore, the reinforcement plate fixing member 6 includes a left-side fixing pipe fitting 9 and a right-side fixing pipe fitting 10 arranged along the length direction of the steel beam web 2, and the left-side fixing pipe fitting 9 and the right-side fixing pipe fitting 10 are respectively located on both sides of the steel beam web 2, and the left-side fixing pipe fitting 9 and the right-side fixing pipe fitting 10 are connected to the steel beam web 2 through a main connecting member, and the steel beam web 2 is clamped between the left-side fixing pipe fitting 9 and the right-side fixing pipe fitting 10, and the left-side reinforcement plate 7 and the right-side reinforcement plate 8 are respectively fixed on the left-side fixing pipe fitting 9 and the right-side fixing pipe fitting 10.

[0030] The assembly operation is convenient, no on-site welding is required, and there is no need to excessively open assembly holes on the steel beam web 2, thereby maintaining high assembly strength.

[0031] Furthermore, the left-side fixed pipe member 9 has a rectangular cross-section and includes sequentially connected pipe walls A, B, C, and D, with pipe wall A and C positioned opposite each other, and pipe wall B and D positioned opposite each other. The right-side fixed pipe member 10 has a rectangular cross-section and includes sequentially connected pipe walls E, F, G, and H, with pipe wall E and G positioned opposite each other, and pipe wall F and H positioned opposite each other. This has strong bending and torsional resistance, can significantly reduce structural weight, and save steel.

[0032] Furthermore, the main connecting part includes a main connecting bolt 11, the bolt body of the main connecting bolt 11 passes through the first pad 12, the pipe wall F, the steel beam web 2, the pipe wall D, the second pad 13 and the main connecting nut 14 in sequence. The first pad 12 and the second pad 13 are respectively located in the right fixed pipe fitting 10 and the left fixed pipe fitting 9, and the left fixed pipe fitting 9 and the right fixed pipe fitting 10 are fixedly connected to the steel beam web 2. The left fixed pipe fitting 9 and the right fixed pipe fitting 10 are respectively provided with an operating square hole A9.1 and an operating square hole B10.1 that match the corresponding main connecting part positions.

[0033] On-site construction is more convenient, quick and safe, and has broad application prospects and development potential.

[0034] Furthermore, the bottom of the left reinforcing plate 7 is vertically connected to a horizontal connecting plate A7.1, and the upper surface of the tube wall A is connected to a horizontal connecting plate B7.3 through a vertical connecting plate A7.2. The horizontal connecting plate B7.3 is detachably connected to the horizontal connecting plate A7.1 through a connecting bolt assembly A7.4.

[0035] Furthermore, the bottom of the right reinforcing plate 8 is vertically connected to a horizontal connecting plate C8.1, and the upper surface of the tube wall E is connected to a horizontal connecting plate D8.3 through a vertical connecting plate B8.2. The horizontal connecting plate D8.3 is detachably connected to the horizontal connecting plate C8.1 through a connecting bolt assembly B8.4.

[0036] Furthermore, the main connecting bolts 11 are arranged in multiple groups along the length direction of the steel beam web 2, and the multiple groups of main connecting bolts 11 are arranged at equal intervals. The operating square holes A9.1 are arranged in multiple groups along the length square of the left fixed pipe fitting 9, and the positions are adapted to the positions of the main connecting bolts 11; the operating square holes B10.1 are arranged in multiple groups along the length square of the right fixed pipe fitting 10, and the positions are adapted to the positions of the main connecting bolts 11.

[0037] Example 3, as Figure 4 As shown, the difference from Example 2 is that multiple groups of inter-web reinforcements are arranged between adjacent steel beam webs 2, and the multiple groups of inter-web reinforcements are arranged at equal intervals.

[0038] Further, refer to Figure 5 The inter-web reinforcement includes a connecting shaft middle section 15, a connecting shaft front section 18 and a connecting shaft tail section 19. The two ends of the connecting shaft middle section 15 are respectively provided with a front plug connector 20 and a rear plug connector 23. The front plug connector 20 is embedded in the plug-in slot A21 and is connected to the connecting shaft front section 18 through the connecting bolt assembly C22. The rear plug connector 23 is embedded in the plug-in slot B24 and is connected to the connecting shaft tail section 19 through the connecting bolt assembly D25. The ends of the connecting shaft front section 18 and the connecting shaft tail section 19 are respectively provided with end connecting bolts B17 and end connecting bolts A16 connected to the corresponding steel beam web 2.

[0039] Adjacent steel beam webs 2 are connected as a whole through inter-web reinforcements, thereby improving the structural strength of the cast-in-place bridge deck 1 and the steel beam webs 2.

[0040] Example 3, the construction method of the fully assembled steel plate composite beam structure includes the following steps: first, prefabricate the assembly of the steel beam web 2 and the steel beam bottom plate 5, as well as the upper embedded steel bars 3, the lower embedded steel bars 4, the left reinforcing plate 7 and the right reinforcing plate 8 in the factory; then build the casting template of the cast-in-place bridge deck 1, and install the upper embedded steel bars 3, the lower embedded steel bars 4, the steel beam web 2, the left reinforcing plate 7 and the right reinforcing plate 8 in the corresponding reserved positions; then fill the bridge deck casting template with concrete to form the cast-in-place bridge deck 1, and remove the bridge deck casting template after the concrete solidifies; secondly, assemble the reinforcement plate fixing part 6 on the steel beam web 2, and then connect the steel beam web 2 with the left reinforcing plate 7 and the right reinforcing plate 8; finally, install the inter-web reinforcement between adjacent steel beam webs 2.

[0041] In the fully assembled steel plate composite beam structure described in the present invention, the cast-in-place bridge deck, the upper embedded steel bars, the lower embedded steel bars and the steel beam web work together to give full play to the resistance of the bridge deck during the construction phase, improve the material utilization rate, and enhance the economic performance of the steel-concrete composite structure; in addition, the left and right reinforcing plates are installed on the steel beam web through the reinforcing plate fixing parts, and the lower embedded steel bars pass through the steel beam web, the left and right reinforcing plates, thereby further enhancing the overall performance of the structure, avoiding the phenomenon of overall structural stiffness degradation due to slippage between the bridge deck and the steel beam, and significantly improving the overall performance of this type of structure.

[0042] The fully assembled steel plate composite beam structure described in the present invention has the following features: the left-side fixed pipe fitting and the right-side fixed pipe fitting are connected to the steel beam web through a main connecting piece; the steel beam web is clamped between the left-side fixed pipe fitting and the right-side fixed pipe fitting; the left-side reinforcing plate and the right-side reinforcing plate are respectively fixed on the left-side fixed pipe fitting and the right-side fixed pipe fitting; the assembly operation is convenient, no on-site welding is required, and no excessive assembly holes need to be opened on the steel beam web, thereby maintaining high assembly strength.

[0043] In the fully assembled steel plate composite beam structure described in the present invention, the rear plug-in connector is embedded in the plug-in slot B, and is connected to the rear section of the connecting shaft by a connecting bolt assembly D. The ends of the front section and the rear section of the connecting shaft are respectively provided with end connecting bolts B and end connecting bolts A connected to the corresponding steel beam webs. The adjacent steel beam webs are connected as a whole by inter-web reinforcements, thereby improving the structural strength of the cast-in-place bridge deck and the steel beam webs.

[0044] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

[0045] Any matters not described in detail in the present invention are well-known technologies to those skilled in the art.

Claims

1. A fully assembled steel plate composite beam structure, including a cast-in-place bridge deck, characterized by: A plurality of groups of steel beam webs are arranged at intervals below the cast-in-place bridge deck, the upper part of the steel beam webs is embedded in the cast-in-place bridge deck, and the bottom end of the steel beam webs is vertically welded with a steel beam bottom plate. The cast-in-place bridge deck is also provided with an upper layer of embedded steel bars and a lower layer of embedded steel bars. The upper part of the steel beam webs is installed with a left reinforcing plate and a right reinforcing plate through reinforcing plate fixings. The left reinforcing plate and the right reinforcing plate are respectively located on both sides of the steel beam web, and the lower layer of embedded steel bars passes through the steel beam web, the left reinforcing plate and the right reinforcing plate.

2. The fully assembled steel plate composite beam structure according to claim 1, characterized in that: The reinforcement plate fixing part includes a left fixed pipe fitting and a right fixed pipe fitting arranged along the length direction of the steel beam web, the left fixed pipe fitting and the right fixed pipe fitting are respectively located on both sides of the steel beam web, the left fixed pipe fitting and the right fixed pipe fitting are connected to the steel beam web through a main connecting part, the steel beam web is clamped between the left fixed pipe fitting and the right fixed pipe fitting, and the left reinforcement plate and the right reinforcement plate are respectively fixed on the left fixed pipe fitting and the right fixed pipe fitting.

3. The fully assembled steel plate composite beam structure according to claim 2, characterized in that: The cross-section of the left fixed pipe fitting is rectangular, including pipe wall A, pipe wall B, pipe wall C and pipe wall D connected in sequence, pipe wall A and pipe wall C are arranged opposite to each other, and pipe wall B and pipe wall D are arranged opposite to each other; the cross-section of the right fixed pipe fitting is rectangular, including pipe wall E, pipe wall F, pipe wall G and pipe wall H connected in sequence, pipe wall E and pipe wall G are arranged opposite to each other, and pipe wall F and pipe wall H are arranged opposite to each other.

4. The fully assembled steel plate composite beam structure according to claim 3, characterized in that: The main connecting part includes a main connecting bolt, the bolt body of the main connecting bolt passes through the first pad, the pipe wall F, the steel beam web, the pipe wall D, the second pad and is threadedly connected to the main connecting nut in sequence. The first pad and the second pad are respectively located in the right fixed pipe fitting and the left fixed pipe fitting, and the left fixed pipe fitting and the right fixed pipe fitting are fixedly connected to the steel beam web. The left fixed pipe fitting and the right fixed pipe fitting are respectively provided with an operating square hole A and an operating square hole B that match the corresponding main connecting part positions.

5. The fully assembled steel plate composite beam structure according to claim 4, characterized in that: The bottom of the left reinforcing plate is vertically connected to a horizontal connecting plate A, and the upper surface of the tube wall A is connected to a horizontal connecting plate B through the vertical connecting plate A. The horizontal connecting plate B is detachably connected to the horizontal connecting plate A through a connecting bolt assembly A.

6. The fully assembled steel plate composite beam structure according to claim 4 or 5, characterized in that: The bottom of the right reinforcing plate is vertically connected to a horizontal connecting plate C, and the upper surface of the tube wall E is connected to a horizontal connecting plate D through a vertical connecting plate B. The horizontal connecting plate D is detachably connected to the horizontal connecting plate C through a connecting bolt assembly B.

7. The fully assembled steel plate composite beam structure according to claim 6, characterized in that: There are multiple groups of main connecting bolts arranged along the length direction of the steel beam web, and the multiple groups of main connecting bolts are arranged at equal intervals. There are multiple groups of operating square holes A arranged along the length square of the left fixed pipe fitting, and the positions are adapted to the positions of the main connecting bolts; there are multiple groups of operating square holes B arranged along the length square of the right fixed pipe fitting, and the positions are adapted to the positions of the main connecting bolts.

8. The fully assembled steel plate composite beam structure according to claim 7, characterized in that: A plurality of groups of inter-web reinforcements are arranged between adjacent webs of the steel beams, and the plurality of groups of inter-web reinforcements are arranged at equal intervals.

9. The fully assembled steel plate composite beam structure according to claim 8, characterized in that: The inter-web reinforcement includes a connecting shaft middle section, a connecting shaft front section and a connecting shaft tail section. The two ends of the connecting shaft middle section are respectively provided with a front plug joint and a rear plug joint. The front plug joint is embedded in the plug-in slot A, and the front plug joint is connected to the connecting shaft front section through the connecting bolt assembly C. The rear plug joint is embedded in the plug-in slot B, and the rear plug joint is connected to the connecting shaft tail section through the connecting bolt assembly D. The ends of the connecting shaft front section and the connecting shaft tail section are respectively provided with end connecting bolts B and end connecting bolts A connected to the corresponding steel beam webs.

10. The construction method of the fully assembled steel plate composite beam structure according to claim 9, characterized in that: The method comprises the following steps: first, prefabricating an assembly of a steel beam web and a steel beam bottom plate, as well as an upper layer of embedded steel bars, a lower layer of embedded steel bars, a left side reinforcing plate and a right side reinforcing plate in a factory; then constructing a casting template for a cast-in-place bridge deck, and installing the upper layer of embedded steel bars, the lower layer of embedded steel bars, the steel beam web, the left side reinforcing plate and the right side reinforcing plate in corresponding reserved positions; then filling the bridge deck casting template with concrete to form a cast-in-place bridge deck, and removing the bridge deck casting template after the concrete solidifies; secondly, assembling the reinforcing plate fixing parts on the steel beam web, and then connecting the steel beam web with the left side reinforcing plate and the right side reinforcing plate; finally, installing inter-web reinforcements between adjacent steel beam webs.

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