Steel structure bridge widening structure

Abstract

The utility model discloses a widening structure of a steel structure bridge, and relates to the technical field of steel structure bridges. The structure comprises a steel structure bridge main body; the two sides of the steel structure bridge body are each provided with a row of widening supporting frames. Rectangular inserting cylinders matched with the widening supporting frames in an inserted mode are fixed to the lower surfaces of the steel structure bridge body edge beams. Two vertically-arranged positioning lock heads are fixed to the side face of a boundary beam of the steel structure bridge body. A wedge block is inserted into the positioning lock head, and the inner side face of the wedge block abuts against the widened supporting frame; and the positioning lock head is also in threaded connection with a first bolt. According to the utility model, non-finished parts prefabricated in factories, such as reinforcing members such as the widening support frame, the rectangular insertion cylinder, the positioning lock head, the wedge block, the guardrail assembly and the connecting plate, are used, so that the rapid widening operation of the steel structure bridge main body is realized; by means of the design, the field welding workload is reduced, the construction efficiency is improved, the construction period is shortened, and meanwhile the stability and the deformation resistance of the bridge deck widening structure are guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of steel structure bridge technology, and in particular relates to a widening structure for steel structure bridges. Background Technology

[0002] With the continuous growth of urban traffic demand, existing bridge structures often struggle to meet the increasing traffic flow. To improve bridge capacity and safety, widening and upgrading existing bridges is necessary. However, traditional bridge widening methods typically involve on-site welding and extensive structural modifications, which are not only time-consuming and labor-intensive but also costly, and may even affect the normal use of the bridge. Therefore, a fast, efficient, and economical bridge widening solution is urgently needed. Utility Model Content

[0003] The purpose of this utility model is to provide a steel bridge widening structure, which reduces the amount of welding work during on-site installation by using prefabricated reinforcing components, thereby enabling rapid widening of the main body of the steel bridge.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] This utility model relates to a steel bridge widening structure, comprising a steel bridge main body; a row of widening support frames installed on both sides of the steel bridge main body; a rectangular insert fixed to the lower surface of the side beam of the steel bridge main body, which is inserted and cooperates with the widening support frame; two vertically arranged positioning lock heads fixed to the side of the side beam of the steel bridge main body; a wedge block inserted into the positioning lock head, the inner side of the wedge block abutting against the widening support frame; a first bolt threadedly connected to the positioning lock head, the first bolt abutting against the top surface of the wedge block; a guardrail assembly inserted into two adjacent widening support frames, and the guardrail assembly is fastened to the widening support frame by two second bolts; a steel plate bridge deck is laid on one row of widening support frames.

[0006] As a preferred technical solution of this utility model, two adjacent widened support frames are connected and fastened by two connecting plates and several third bolts.

[0007] As a preferred embodiment of this utility model, the widened support frame is a right-angled triangular frame welded from channel steel, with the two straight sides of the right-angled triangular frame serving as a horizontal beam and a vertical beam; the vertical beam of the right-angled triangular frame has two rectangular through holes that mate with the positioning lock head; a load-bearing plug is fixed to the lower outer side of the vertical beam of the right-angled triangular frame, arranged perpendicularly to each other; the load-bearing plug is inserted into the rectangular insert; two pairs of U-shaped groove plates are symmetrically fixed to the opposite outer sides of the horizontal beam of the right-angled triangular frame, and the top surface of the U-shaped groove plate is coplanar with the top surface of the horizontal beam of the right-angled triangular frame; the free end of the U-shaped groove plate has two third threaded through holes that are threadedly connected to the third bolt; the connecting plate is placed inside the U-shaped groove plate; a rectangular cover plate is fixed to the top surface of the tip of the right-angled triangular frame; the rectangular cover plate has two second circular through holes that mate with the second bolt.

[0008] As a preferred embodiment of this utility model, the connecting plate includes a long and narrow rectangular plate; the rectangular plate has four elongated circular holes that mate with the third bolt.

[0009] As a preferred embodiment of this utility model, the positioning lock head includes a rectangular plug that engages with the rectangular through hole; the length of the rectangular plug is less than the thickness of the vertical beam of the right-angled triangular frame; the upper end of the free end face of the rectangular plug is fixed with an internally threaded hole plate that engages with the first bolt; the lower end of the free end face of the rectangular plug is fixed with a rectangular ring that engages with the wedge; the wedge has a right-angled trapezoidal cross-section.

[0010] As a preferred embodiment of this utility model, the guardrail assembly includes a square tube; two connecting plates that are inserted and engaged with the widened support frame are fixed on one side of the square tube; two second threaded through holes that engage with the second bolt are provided on the connecting plates; and a mesh guardrail is fixed on the upper surface of the square tube.

[0011] This utility model has the following beneficial effects:

[0012] 1. This utility model achieves rapid widening of the main body of a steel bridge by using prefabricated non-finished components such as widening support frames, rectangular inserts, positioning locks, wedges, guardrail components, and connecting plates. This design reduces on-site welding work, improves construction efficiency, shortens the construction cycle, and ensures the stability and deformation resistance of the widened bridge structure.

[0013] 2. Through reasonable design, such as the insertion and cooperation of the rectangular tube and the widened support frame, and the cooperation of the positioning lock head and the wedge block, this utility model makes the widened bridge structure more stable and reliable.

[0014] 3. The widened support frame of this utility model is welded from channel steel and has high support strength and resistance to deformation, making it suitable for bridge reinforcement and renovation.

[0015] 4. The reinforcing components for bridge widening using this utility model have been prefabricated in the factory, resulting in low manufacturing costs.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the steel structure bridge widening structure of this utility model.

[0019] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0020] Figure 3 This is a schematic diagram of the structure of a steel bridge after the steel deck has been removed from one side after the bridge body on both sides has been widened.

[0021] Figure 4 for Figure 3 A magnified view of a section at point B.

[0022] Figure 5 This is a structural diagram showing the welding of rectangular inserts and positioning locks onto the main body of a steel bridge.

[0023] Figure 6 for Figure 5 A magnified view of a section at point C.

[0024] Figure 7 A schematic diagram of the structure for widening the support frame.

[0025] Figure 8 This is a structural diagram of the guardrail assembly.

[0026] Figure 9 This is a structural schematic diagram of the connecting plate.

[0027] Figure 10 This is a partial schematic diagram showing the main body of the steel bridge, the widened support frame, the positioning lock head, the wedge block, and the connection and coordination of the first bolt.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1-Steel bridge main body, 2-Wideened support frame, 3-Rectangular insert, 4-Positioning lock head, 5-Wedge block, 6-First bolt, 7-Guardrail assembly, 8-Steel plate bridge deck, 9-Connecting plate, 10-Third bolt, 21-Right-angled triangle frame, 22-Rectangular through hole, 23-Load-bearing plug, 24-U-shaped channel plate, 25-Third threaded through hole, 26-Rectangular cover plate, 27-Second round through hole, 41-Rectangular plug, 42-Internal threaded hole plate, 43-Rectangular ring, 71-Square tube, 72-Connecting insert plate, 73-Second threaded through hole, 74-Grid-type guardrail mesh, 91-Rectangular plate, 92-Round elongated hole. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Specific Implementation Example 1:

[0032] Please see Figure 1-9 As shown, this utility model is a widening structure for a steel bridge, including a steel bridge main body 1. A row of widening support frames 2 is installed on each side of the steel bridge main body 1. A rectangular insert 3, which engages with the widening support frame 2, is fixed to the lower surface of the side beam of the steel bridge main body 1. Two vertically arranged positioning lock heads 4 are fixed to the side of the side beam of the steel bridge main body 1. A wedge 5 is inserted into the positioning lock head 4, with the inner side of the wedge 5 pressing against the widening support frame 2. A first bolt 6 is also threaded onto the positioning lock head 4, and the first bolt 6 presses against the top surface of the wedge 5. A guardrail assembly 7 is inserted into each of two adjacent widening support frames 2, and the guardrail assembly 7 is fastened to the widening support frame 2 by two second bolts. A steel plate bridge deck 8 is laid and installed on one row of widening support frames 2. The steel plate bridge deck 8 is composed of several steel plates welded together on one row of widening support frames 2.

[0033] In order to secure the connection between two adjacent widened support frames 2 and improve the stability of the steel plate bridge deck 8, two connecting plates 9 and several third bolts 10 are used to secure the two adjacent widened support frames 2.

[0034] Non-finished components used in the main body 1 of the steel bridge, such as widening support frames 2, rectangular inserts 3, positioning locks 4, wedges 5, guardrail components 7, and connecting plates 9, are all prefabricated in batches in the factory. Batch factory production is faster and cheaper than on-site welding. During widening operations, only rectangular inserts 3, with dimensions matching the lower surface of the side beam of the main body 1, need to be welded to fit the widening support frame 2. Two vertically arranged positioning locks 4 are welded to the side of the side beam of the main body 1. After welding the rectangular inserts 3 and positioning locks 4, the widening support frame 2 is horizontally inserted into the rectangular inserts 3 and the two positioning locks 4. The wedges 5 are then inserted into the positioning locks 4. The first bolt 6 is used to press down the wedges 5, thus stably attaching the widening support frame 2 to the side of the side beam of the main body 1, completing the installation of the widening support frame 2. Then, the connecting plate 9 is used with the third bolt 10 to connect two widening support frames 2 together, thus connecting all the widening support frames 2 together. The guardrail component 7 is inserted into the outer end of the widened support frame 2 and secured with the second bolt to form the guardrail of the widened section. Finally, the steel plate bridge deck 8 is welded to form the widened bridge road surface that can be walked on. The steel bridge main body 1 requires less welding work during the widening operation, and the prefabricated reinforcement components in the factory can be quickly connected and installed on site, resulting in high overall construction efficiency, short construction period, and stable bridge deck widening structure.

[0035] The widened support frame 2 is specifically a right-angled triangular frame 21 welded from channel steel, with its two straight sides forming a horizontal beam and a vertical beam. The vertical beam of the right-angled triangular frame 21 has two rectangular through holes 22 that mate with the positioning lock head 4. A load-bearing plug 23, perpendicularly arranged, is fixed to the lower outer side of the vertical beam of the right-angled triangular frame 21. The load-bearing plug 23 is inserted into a rectangular insert 3. Two pairs of U-shaped channel plates 24 are symmetrically fixed to the opposite outer sides of the horizontal beam of the right-angled triangular frame 21, with the top surface of the U-shaped channel plate 24 coplanar with the top surface of the horizontal beam of the right-angled triangular frame 21. The free end of the U-shaped channel plate 24 has two third threaded through holes 25 that are threaded to the third bolt 10. The connecting plate 9 is placed inside the U-shaped channel plate 24. A rectangular cover plate 26 is fixed to the top surface of the tip of the right-angled triangular frame 21. The rectangular cover plate 26 has two second circular through holes 27 that mate with the second bolt. The widened support frame 2 is made of channel steel, which has high support strength and strong resistance to deformation, making it suitable for bridge reinforcement and renovation.

[0036] The connecting plate 9 includes a long, narrow rectangular plate 91. The rectangular plate 91 has four elongated circular holes 92 that mate with the third bolt 10. These holes 92 allow for slight misalignment of the connecting ends of adjacent widened support frames 2 caused by minor positional deviations during welding of the rectangular insert 3 and the positioning lock head 4.

[0037] Among them, such as Figure 4 , Figure 6 and Figure 10As shown, the positioning lock head 4 includes a rectangular plug 41 that engages with the rectangular through hole 22. The length of the rectangular plug 41 is less than the thickness of the vertical beam of the right-angled triangular frame 21. An internally threaded hole plate 42, which engages with the threaded connection of the first bolt 6, is fixed to the upper part of the free end face of the rectangular plug 41. A rectangular ring sleeve 43, which engages with the wedge block 5, is fixed to the lower part of the free end face of the rectangular plug 41. The distance between adjacent ends of the internally threaded hole plate 42 and the rectangular ring sleeve 43 is greater than the height of the wedge block 5. When installing the wedge block 5, it is horizontally inserted between the internally threaded hole plate 42 and the rectangular ring sleeve 43. After the wedge block 5 is inserted, its lower tip is inserted into the rectangular ring sleeve 43. The first bolt 6 is rotated to press the wedge block 5 down, and the lower end of the wedge block 5 abuts against the side of the widened support frame 2. The widened support frame 2 is pressed against the main body of the steel bridge 1. After the widened support frame 2 is pressed against the main body of the steel bridge 1, the wedge block 5 completes the clamping action, and the rotation of the first bolt 6 is stopped to prevent slippage. The wedge block 5 has a right-angled trapezoidal cross-section. The cooperation between the positioning lock head 4, the wedge block 5, and the first bolt 6 allows the widened support frame 2 to be quickly attached to the main body 1 of the steel bridge. The first bolt 6 presses down on the wedge block 5 to position the relative position of the wedge block 5 and prevent slippage. This effectively prevents the widened support frame 2 from detaching from the positioning lock head 4 and the rectangular insert 3. The rectangular insert 3 and the two positioning lock heads 4 work together to support the widened support frame 2.

[0038] The guardrail assembly 7 includes a square tube 71. Two connecting plates 72 are fixed to one side of the square tube 71 and interlock with the widened support frame 2. Two threaded through holes 73 are formed on the connecting plates 72 and mate with second bolts. A mesh guardrail net 74 is fixed to the upper surface of the square tube 71. The connecting ends of two adjacent guardrail assemblies 7 can be welded together to form a single guardrail.

[0039] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A steel bridge widening structure, comprising a steel bridge main body (1), characterized in that: A row of widened support frames (2) is installed on both sides of the main body (1) of the steel bridge. A rectangular insert (3) is fixed on the lower surface of the side beam of the main body (1) of the steel bridge and is inserted into the widening support frame (2); two vertically arranged positioning lock heads (4) are fixed on the side of the side beam of the main body (1) of the steel bridge; a wedge (5) is inserted into the positioning lock head (4) and the inner side of the wedge (5) abuts against the widening support frame (2); a first bolt (6) is also threaded onto the positioning lock head (4) and the first bolt (6) abuts against the top surface of the wedge (5); A guardrail assembly (7) is inserted and installed on each of the two adjacent widened support frames (2), and the guardrail assembly (7) is fastened to the widened support frame (2) by two second bolts; A steel plate bridge deck (8) is laid and installed on one of the widened support frames (2).

2. The steel bridge widening structure according to claim 1, characterized in that, The two adjacent widened support frames (2) are connected and fastened by two connecting plates (9) and several third bolts (10).

3. The steel bridge widening structure according to claim 2, characterized in that, The widened support frame (2) is a right-angled triangular frame (21) welded from channel steel, and the two straight sides of the right-angled triangular frame (21) are a horizontal beam and a vertical beam; the vertical beam of the right-angled triangular frame (21) has two rectangular through holes (22) that cooperate with the positioning lock head (4); the lower outer side of the vertical beam of the right-angled triangular frame (21) is fixed with mutually perpendicular load-bearing plugs (23); the load-bearing plugs (23) are inserted into the rectangular plug tube (3); the opposite outer sides of the horizontal beam of the right-angled triangular frame (21) face Two pairs of U-shaped groove plates (24) are fixed, and the top surface of the U-shaped groove plate (24) is coplanar with the top surface of the crossbeam of the right triangle frame (21); the free end of the U-shaped groove plate (24) has two third threaded through holes (25) that are threaded to the third bolt (10); the connecting plate (9) is placed inside the U-shaped groove plate (24); the top surface of the tip of the right triangle frame (21) is fixed with a rectangular cover plate (26); the rectangular cover plate (26) has two second round through holes (27) that cooperate with the second bolt.

4. The steel bridge widening structure according to claim 3, characterized in that, The connecting plate (9) includes a long rectangular plate (91); the rectangular plate (91) has four elongated holes (92) that mate with the third bolt (10).

5. The steel bridge widening structure according to claim 3, characterized in that, The positioning lock head (4) includes a rectangular plug (41) that is inserted into the rectangular through hole (22); the length of the rectangular plug (41) is less than the thickness of the vertical beam of the right-angled triangle frame (21); the upper end of the free end face of the rectangular plug (41) is fixed with an internal threaded hole plate (42) that is threadedly connected to the first bolt (6); the lower end of the free end face of the rectangular plug (41) is fixed with a rectangular ring (43) that is inserted into the wedge (5); the wedge (5) has a right-angled trapezoidal cross-section.

6. The steel bridge widening structure according to claim 3, characterized in that, The guardrail assembly (7) includes a square tube (71); two connecting plates (72) are fixed on one side of the square tube (71) and are inserted into the widened support frame (2); two second threaded through holes (73) are opened on the connecting plates (72) and are engaged with the second bolts; a mesh guardrail net (74) is fixed on the upper surface of the square tube (71).

Images