Rapid widening new and old bridge structure adopting thin steel plates

Abstract

The utility model belongs to the technical field of bridge engineering, and particularly relates to a rapid widening new and old bridge structure adopting thin steel plates. The utility model provides a rapid widening new and old bridge structure adopting thin steel plates, which comprises a screw joint single plate unit and a clamping plate combination unit, so that 1, proper connecting structures are arranged between webs and between transverse clapboards of new and old bridges, and the strength of transverse connection and vertical load sharing is enough; 2, the screw joint single plate unit and the clamping plate combination unit have the combination performance of tensile strength and compression resistance, so that the connection strength between a new bridge and an old bridge is higher;

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge engineering, and particularly relates to a new and old bridge structure which adopts thin steel plates for rapid widening. Background Art

[0002] The widening structure of new and old bridges refers to a connection structure used to reinforce parallel bridges built successively. It is mainly used to upgrade and renovate old bridges with poor structural strength and narrow width.

[0003] Generally, a more specific structural description is: adding a connection structure between the two T-beams or box beams on the left and right, so that the new and old bridges can be connected and reinforced in the horizontal direction and share the load in the vertical direction. The above connection reinforcement effect includes both the horizontal and longitudinal directions of the bridge.

[0004] For example, a Chinese utility model patent with authorization announcement number CN215801122U and authorization announcement date 2022.02.11 discloses a prefabricated device for widening T-beams of new and old bridges, including a first T-beam and a second T-beam, with a first cross plate and a second cross plate provided between the two T-beams, and a buffer device provided on the first cross plate, the buffer device including at least one first support rod screwed and fixed to the second cross plate, a compression spring sleeved on the first support rod, a second support rod screwed to the first support rod and abutting the lower end surface of the first cross plate, and a support plate provided on the second support rod.

[0005] The structural principle and advantages of the widening prefabricated device in this utility model patent are as follows: two support rods and compression springs are arranged between the two horizontal plates, which increases the rigidity and stability of the bridge superstructure and makes the load distribution of the two T-beams more uniform. The structure is simple and compact, and the installation and construction are convenient.

[0006] However, the prefabricated device for widening has at least the following two shortcomings during actual construction and use, which are also the technical problems to be solved by the utility model, namely:

[0007] 1. The combined structure of the second transverse plate and the tie rod is only applicable to the web. When used on the diaphragm, the tie rod needs to pass through the entire diaphragm, and a relatively long hole must be opened, which is very troublesome and difficult.

[0008] 2. It is still a combination structure of the second horizontal plate and the tie rod, in which the second horizontal plate only has compressive resistance and the tie rod only has tensile resistance. The two effects are actually independent of each other, and the tensile effect is particularly insufficient. Therefore, the overall structural strength is not large and cannot provide sufficient lateral reinforcement between the new and old bridges.

[0009] Therefore, in summary, there is an urgent need for a new widening structure that includes both diaphragms and webs and has relatively high lateral reinforcement strength for use in the renovation and upgrading of old bridges. Utility Model Content

[0010] The utility model provides a new and old bridge structure that is quickly widened by thin steel plates, which comprises a screw-connected single plate unit and a clamping plate combination unit, so that:

[0011] 1. Both the new and old bridges have appropriate connection structures between the webs and diaphragms to ensure that the strength of the lateral connection and vertical load sharing is sufficient;

[0012] 2. Both the screwed single plate unit and the plywood combination unit have combined tensile and compressive properties, making the connection between the new and old bridges stronger.

[0013] The technical solution adopted by the utility model to solve the above problems is: using thin steel plates to quickly widen the new and old bridge structures, including bolted single plate units with two ends respectively arranged on two bridge webs, and splint combination units arranged on both sides of two bridge diaphragms.

[0014] A further preferred technical solution is that the screwed single plate unit includes a single plate, two end plates respectively arranged at both sides of the single plate, mounting holes arranged on the end plates, and mounting bolts arranged on the mounting holes and used to connect the bridge web.

[0015] A further preferred technical solution is that the screw-connected single-board unit also includes an I-shaped plate arranged on the mounting bolts, and connecting bolts arranged on the I-shaped plate and used to connect the mounting holes.

[0016] A further preferred technical solution is that the screwed single plate unit also includes vertical stiffening ribs arranged on the single plate.

[0017] A further preferred technical solution is that the cross-sectional shape of the vertical stiffening rib is any one of a U-shape, a U-shape, and an I-shape.

[0018] A further preferred technical solution is that the clamping plate assembly unit includes two side plates respectively arranged at the two sides of two bridge diaphragms, fixing holes arranged on the side plates, and fixing bolts arranged on the fixing holes and the bridge diaphragms.

[0019] A further preferred technical solution is that the splint assembly unit further includes middle reinforcement strips symmetrically arranged on the two side panels.

[0020] A further preferred technical solution is that the clamping plate assembly unit also includes a welding strip arranged on the middle reinforcement strip and used for connecting the side panels.

[0021] A further preferred technical solution is that the two welding strips are respectively arranged at two sides of the middle reinforcement strip.

[0022] A further preferred technical solution is that 4 to 10 fixing holes are provided at a single side of the side plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model from a top view.

[0024] Figure 2 It is a schematic diagram of the position of the screw-connected single-board unit in the utility model.

[0025] Figure 3 It is a schematic diagram of the structure of the screw-connected single-board unit in the utility model from a top view.

[0026] Figure 4 This is a schematic diagram of the structure of one type of vertical stiffening ribs in the utility model.

[0027] Figure 5 It is a schematic diagram of the position structure of the splint combination unit in the utility model.

[0028] Figure 6 It is a schematic diagram of the position of the welding strip in the utility model.

[0029] In the figure, the meanings of the symbols are as follows:

[0030] Bridge web a, bridge diaphragm b, bridge wing c;

[0031] Screw-connect the single board unit 1 and the plywood assembly unit 2;

[0032] Single plate 101 , end plate 102 , mounting holes 103 , mounting bolts 104 , I-shaped plate 105 , connecting bolts 106 , vertical stiffening ribs 107 , side plate 201 , fixing holes 202 , fixing bolts 203 , middle reinforcement strip 204 , welding strip 205 . DETAILED DESCRIPTION

[0033] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0034] As attached Figure 1-6 As shown, a new and old bridge structure using thin steel plates for rapid widening comprises a bolted single plate unit 1 with two ends respectively arranged on two bridge webs a, and a plywood combination unit 2 arranged at both sides of two bridge diaphragms b.

[0035] In this embodiment, the most basic structural components of the new and old bridges include: a bridge web a, a bridge diaphragm b and a bridge wing c, and when any one of them is a box girder, it also includes a bridge bottom plate.

[0036] Among them, a plurality of the bolted single plate units 1 and the clamping plate combination units 2 are arranged in a row upwardly on the longitudinal bridge of the new and old bridges and distributed as needed, without the need for uniform spacing or a certain number of combinations. The bolted single plate unit 1 has no clear positional limitation on the two opposite bridge webs a, and the clamping plate combination unit 2 can be set on each pair of the bridge transverse diaphragms b aligned left and right.

[0037] At this point, the new and old bridges are connected by vertical thin steel plates, which have at least the following functions:

[0038] First, in the horizontal direction, the widening structure can hold and support the new and old bridges to prevent them from moving away from or approaching each other.

[0039] Second, in the longitudinal direction of the bridge, the widening structure can still hold the old and new bridges together to avoid the two being misaligned with each other;

[0040] Third, in the vertical direction, the widening structure can share the load. For example, the load of vehicles passing on the old bridge can be partially borne by the new bridge. This is very critical for the old bridge whose structural strength has been significantly reduced.

[0041] The screwed single plate unit 1 includes a single plate 101, two end plates 102 respectively arranged at both sides of the single plate 101, mounting holes 103 arranged on the end plates 102, and mounting bolts 104 arranged on the mounting holes 103 and used for connecting the bridge web a.

[0042] In this embodiment, the single plate 101 and the end plate 102 are a whole piece of thin steel plate, and the mounting bolts 104 are a combination of bolts and nuts, or expansion bolts.

[0043] In addition, since the bridge web a may be vertical or inclined, the fold between the single plate 101 and the end plate 102 also needs to be set accordingly, and the fold and the upper and lower sides of the single plate 101 are also correspondingly vertical or inclined.

[0044] Finally, it is sufficient to ensure that the end plate 102 is always parallel to the bridge web a, that is, the mounting bolts 104 are always perpendicular to the bridge web a.

[0045] The screw-connected single-board unit 1 further includes an I-shaped plate 105 disposed on the mounting bolts 104 , and a connecting bolt 106 disposed on the I-shaped plate 105 and used for connecting the mounting holes 103 .

[0046] In this embodiment, the structure of the X-shaped plate 105 includes, in sequence: a middle plate for supporting the end plate 102, two protruding plates on both sides, and two bottom plates on the side edges.

[0047] At this time, the mounting bolts 104 are arranged on the bottom plate, and the connecting bolts 106 are arranged on the middle plate. The function of the cross-shaped plate 105 is:

[0048] First, the single-end screw connection position of the original screw-connected single-board unit 1 is upgraded from 1 to 2, thereby improving the screw connection strength of the screw-connected single-board unit 1;

[0049] Second, the original "hard connection" relationship between the single plate 101 and the bridge web a is replaced with an "elastic connection", that is, the "X"-shaped plate 105 provides the single plate 101 with a cavity that can be slightly deformed, ensuring that the screwed single plate unit 1 has a certain self-deformation protection effect under the premise of sufficient tensile and compressive strength, thereby avoiding being easily broken or pulled apart.

[0050] In addition, the connecting bolts 106 are a combination of bolts and nuts and cannot be expansion bolts, because the X-shaped plate 105 and the end plate 102 are both steel structures and cannot be provided with a groove for installing the expansion bolts.

[0051] The screwed single panel unit 1 further includes vertical stiffening ribs 107 arranged on the single panel 101 .

[0052] In this embodiment, the main function of the vertical stiffening ribs 107 is to improve the load-bearing capacity of the single board 101 and to resist the tendency of vertical distortion and dislocation of the single board 101, thereby ensuring that the single board 101 is not easily torn or broken.

[0053] In addition, the vertical stiffening ribs 107 can also appropriately improve the tensile and compressive resistance of the single plate 101, but the strength is not as great as the above-mentioned anti-torsion effect.

[0054] The cross-sectional shape of the vertical stiffening rib 107 is any one of a U-shape, a U-shape, and an I-shape.

[0055] In this embodiment, the vertical stiffening ribs 107 are welded to the single plate 101 at a later stage, and are all located on the same side of the single plate 101 .

[0056] In addition, the two ends of the U-shaped structure are welded to the single plate 101 , and the internal angle of the U-shaped structure is a right angle or an obtuse angle.

[0057] At this point, the U-shape, the circular shape and the I-shape can all form a closed vertical cavity structure on the single board 101, upgrading the original "two-dimensional structure" of the single board 101 to a "three-dimensional structure", so that its ability to safely share the load is greater.

[0058] The clamping plate assembly unit 2 includes two side plates 201 respectively arranged at the two sides of two bridge diaphragms b, fixing holes 202 arranged on the side plates 201, and fixing bolts 203 arranged on the fixing holes 202 and the bridge diaphragms b.

[0059] In this embodiment, the thin steel plates refer to the single plate 101, the end plate 102 and the side plate 201. The thin steel plates are defined as steel plates with a thickness of 2 cm or less.

[0060] The fixing bolt 203 is a bolt-nut combination, and the bridge diaphragm b needs to have installation holes opened in advance for the fixing bolt 203 .

[0061] The clamping plate assembly unit 2 further includes a middle reinforcement strip 204 symmetrically arranged on two sides of the two side plates 201 .

[0062] In this embodiment, the middle reinforcement strip 204 is perpendicular to the two side panels 201 , and its function is to “integrate” the two side panels 201 , thereby improving the structural integrity and structural strength of the splint assembly unit 2 .

[0063] The middle reinforcement strip 204 and the side plate 201 are fixed by welding.

[0064] The clamping plate assembly unit 2 further includes a welding strip 205 disposed on the middle reinforcing strip 204 and used for connecting the side plates 201 .

[0065] In this embodiment, the welding strip 205 serves to provide a larger welding area for the above-mentioned welding operation of the middle reinforcing strip 204 .

[0066] Among them, both sides of the welding rod 205 can be welded, and if the relatively central position in the vertical direction is difficult to weld, it can be omitted, ensuring that at least four sides of the welding rod 205, namely the upper left, upper right, lower left, and lower right, are fully welded.

[0067] The two welding strips 205 are respectively arranged at two sides of the middle reinforcing strip 204 .

[0068] In this embodiment, the welding strip 205 and the middle reinforcing strip 204 are an integral whole, bent into a right-angled “Z-shape”, and the material thereof may be the same thin steel plate as the side plate 201 .

[0069] 4 to 10 fixing holes 202 are provided on one side of the side plate 201 .

[0070] In this embodiment, the side panels 201 and the single panel 101 have their long sides as lateral sides, ensuring sufficient width distance for assembling the new and old bridges.

[0071] In addition, both ends of the side panels 201 are fully screwed and used in a "two-in-one" manner, ensuring that the tension, compression and vertical torsional strengths of the splint assembly unit 2 are relatively high.

[0072] The above is a detailed description of the implementation of the utility model in conjunction with the accompanying drawings, but the utility model is not limited to the above implementation. Various modifications can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the utility model. These are all non-creative modifications and are protected by patent law as long as they are within the scope of the claims of the utility model.

Claims

1. Rapid widening of new and old bridge structures using thin steel plates, characterized by: It comprises a bolted single plate unit (1) with two ends respectively arranged on two bridge webs (a), and a clamping plate combination unit (2) arranged at both sides of two bridge transverse diaphragms (b).

2. The structure of rapid widening of new and old bridges using thin steel plates according to claim 1 is characterized in that: The screw-connected single plate unit (1) comprises a single plate (101), two end plates (102) respectively arranged at two sides of the single plate (101), mounting holes (103) arranged on the end plates (102), and mounting bolts (104) arranged on the mounting holes (103) and used for connecting the bridge web (a).

3. The structure of quickly widening a new and old bridge using thin steel plates according to claim 2 is characterized in that: The screw-connected single-board unit (1) further comprises an I-shaped plate (105) arranged on the mounting bolt (104), and a connecting bolt (106) arranged on the I-shaped plate (105) and used for connecting the mounting hole (103).

4. The structure of quickly widening a new and old bridge using thin steel plates according to claim 2 is characterized in that: The screwed single plate unit (1) further comprises a vertical stiffening rib (107) arranged on the single plate (101).

5. The structure of quickly widening a new and old bridge using thin steel plates according to claim 4 is characterized in that: The cross-sectional shape of the vertical stiffening rib (107) is any one of a U-shape, a U-shape, and an I-shape.

6. The structure of rapid widening of new and old bridges using thin steel plates according to claim 1 is characterized in that: The clamping plate assembly unit (2) comprises two side plates (201) respectively arranged at the two sides of two bridge diaphragms (b), fixing holes (202) arranged on the side plates (201), and fixing bolts (203) arranged on the fixing holes (202) and the bridge diaphragms (b).

7. The structure of quickly widening a new and old bridge using thin steel plates according to claim 6 is characterized in that: The clamping plate assembly unit (2) further comprises middle reinforcement strips (204) symmetrically arranged on two sides of the two side plates (201).

8. The structure of quickly widening a new and old bridge using thin steel plates according to claim 7 is characterized in that: The clamping plate assembly unit (2) further comprises a welding strip (205) arranged on the middle reinforcement strip (204) and used for connecting the side plates (201).

9. The structure of quickly widening a new and old bridge using thin steel plates according to claim 8 is characterized in that: The two welding strips (205) are respectively arranged at two sides of the middle reinforcing strip (204).

10. The structure of rapid widening of new and old bridges using thin steel plates according to claim 6 is characterized in that: 4 to 10 fixing holes (202) are provided at one side of the side plate (201).

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