Anti-cracking prefabricated box girder

Abstract

The utility model discloses an anti-cracking prefabricated box girder, relates to the technical field of box girders, aims to solve the problem of cracking of the box girder due to uneven stress, and adopts the technical scheme that the anti-cracking prefabricated box girder comprises a box girder, a space is formed in the box girder, two ends of the box girder are provided with abutting pieces, the abutting pieces support the edges of the two ends of the box girder, and the box girder is provided with a plurality of grooves. A traction strip and an arc-shaped piece are connected between the two abutting-connecting pieces, the traction strip limits the maximum distance between the two abutting-connecting pieces, the two ends of the arc-shaped piece push the two abutting-connecting pieces respectively, and the middle section of the arc-shaped piece abuts against the inner wall of the box girder. According to the anti-cracking prefabricated box girder, the shaking amplitude of the box girder can be reduced and the middle section of the box girder can be supported under the arrangement of the arc-shaped pieces and the balancing weights, the gravity of the box girder can be shared in multiple directions due to the arrangement of the stand columns, and the possibility that the box girder is likely to crack is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of box beams, and more specifically, to a crack-resistant prefabricated box beam. Background Art

[0002] A box girder is a type of beam that is mostly used in the construction of bridges.

[0003] During the transportation or use of box girders, cracks may occur in some areas due to uneven force of various parts of the box girder during installation and use due to shaking and pressure. This causes the box girder to need frequent maintenance or even replacement, which is extremely inconvenient for the owner.

[0004] Therefore, a new solution needs to be proposed to supplement the existing box girder categories. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a crack-resistant prefabricated box girder.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a crack-resistant prefabricated box girder, comprising a box girder, a space formed inside the box girder, abutment members are arranged at both ends of the box girder, the abutment members support the edges of the two ends of the box girder, a pulling strip and an arc-shaped member are connected between the two abutment members, the pulling strip forms a maximum distance limit between the two abutment members, the two ends of the arc-shaped member push the two abutment members respectively, the middle section of the arc-shaped member abuts against the inner wall of the box girder, and a counterweight block is suspended on the arc-shaped member.

[0007] The utility model is further configured as follows: the abutment member is configured as a column and a multi-layer pad, a through hole is formed on the box beam, the column is embedded in and partially penetrates the through hole, and the pad is arranged at one end of the column away from the through hole.

[0008] The utility model is further configured as follows: the pulling bar is configured as a steel rope formed by winding a plurality of steel wires with each other, and the two ends of the pulling bar are respectively fixedly arranged on two upright posts.

[0009] The utility model is further configured as follows: each of the pads is provided with a clamping block, and the clamping block abuts against adjacent pads or columns.

[0010] The utility model is further configured as follows: the arc-shaped member and the counterweight block are pulled by a connecting rope, and the connecting rope is also configured as a plurality of steel wires to form a winding.

[0011] The utility model is further configured as follows: a cushion layer is fixedly arranged between the arc-shaped member and the inner wall of the box beam.

[0012] In summary, the utility model has the following beneficial effects: the box girder, with the arrangement of arc-shaped parts and counterweights, can reduce the swing amplitude of the box girder and support the middle section of the box girder. In addition, the arrangement of columns enables the gravity of the box girder to be shared in multiple directions, thereby reducing the possibility of cracking of the box girder. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0015] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0016] In the figure: 1. box girder; 2. space; 3. tension bar; 4. arc-shaped member; 5. counterweight; 6. column; 7. pad; 8. clamping block; 9. cushion layer. DETAILED DESCRIPTION

[0017] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0018] A crack-resistant prefabricated box girder, such as Figure 1-Figure 3As shown, it includes a box girder 1, a space 2 is formed inside the box girder 1, and abutments are arranged at both ends of the box girder 1, which support the edges of the two ends of the box girder 1. The setting of the abutments forms protection for the box girder 1 at both ends, so that the force formed when the two ends of the box girder 1 contact with the piers can be dispersed to other areas of the box girder 1, and a pull bar 3 and an arc-shaped member 4 are connected between the two abutments. The pull bar 3 forms a maximum distance limit between the two abutments, and the two ends of the arc-shaped member 4 push the two abutments respectively. The middle section of the arc-shaped member 4 abuts against the inner wall of the box girder 1, and the setting of the pull bar 3 forms a pulling force between the two abutments, so as to offset the pushing force formed by the arc-shaped member 4 on the two abutments, so that the abutments, the pull bar 3 and the arc-shaped member 4 can be fixed in position with each other after being installed in the space 2 area of ​​the box girder 1, and a counterweight block 5 is suspended on the arc-shaped member 4. In some cases, the box girder 1 will shake. The counterweight 5 is provided to form the stability of the box girder 1, so that the box girder 1 can minimize the shaking during transportation or after construction, thereby reducing the pressure that may be formed on various parts of the box girder 1 and avoiding cracking due to stress. The abutment is provided as a column 6 and a multi-layer pad 7. A through hole is formed on the box girder 1, and the column 6 is embedded in and partially penetrates the through hole. The pad 7 is provided at the end of the column 6 away from the through hole. The column 6 needs to be installed. After installation, the end of the column 6 away from the through hole cannot contact each other. The multi-layer pad 7 is provided to fill the area between the column 6 and the box girder 1, so that the force formed by the column 6 on the box girder 1 can be dispersed to other areas. A cushion layer 9 is fixedly provided between the arc member 4 and the inner wall of the box girder 1. The cushion layer 9 forms a barrier between the arc member 4 and the box girder 1. The arc member 4 will support the middle part of the box girder 1 to share the force between the middle part of the box girder 1 and the two ends of the box girder 1.

[0019] The pulling strip 3 is configured as a steel rope formed by winding a plurality of steel wires with each other, and the two ends of the pulling strip 3 are respectively fixed on the two columns 6. The arc-shaped member 4 and the counterweight block 5 are pulled by a connecting rope, and the connecting rope is also configured as a plurality of steel wires wound together. The steel rope formed by the winding of the steel wires can form a pull between the arc-shaped member 4 and the counterweight block 5, as well as between the two columns 6, and form toughness during the pulling. A clamping block 8 is provided on each pad 7, and the clamping block 8 abuts against the adjacent pad 7 or column 6. The setting of the clamping block 8 is used to fix the position between the pad 7 and the column 6 to minimize the misalignment between the thin pad 7 and the column 6.

[0020] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0021] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A crack-resistant prefabricated box girder, characterized in that: The invention comprises a box beam (1), wherein a space (2) is formed inside the box beam (1), abutment members are arranged at both ends of the box beam (1), the abutment members support the edges of both ends of the box beam (1), a pulling strip (3) and an arc-shaped member (4) are connected between the two abutment members, the pulling strip (3) forms a maximum distance limit between the two abutment members, the two ends of the arc-shaped member (4) respectively push the two abutment members, the middle section of the arc-shaped member (4) abuts against the inner wall of the box beam (1), and a counterweight block (5) is suspended from the arc-shaped member (4).

2. The anti-cracking prefabricated box beam according to claim 1, characterized in that: The abutment member is configured as a column (6) and a multi-layer pad (7); a through hole is formed on the box beam (1); the column (6) is embedded in and partially penetrates the through hole; and the pad (7) is disposed at one end of the column (6) away from the through hole.

3. The anti-cracking prefabricated box beam according to claim 2, characterized in that: The pulling bar (3) is configured as a steel rope formed by winding a plurality of steel wires with each other, and the two ends of the pulling bar (3) are respectively fixedly disposed on two upright posts (6).

4. The anti-cracking prefabricated box beam according to claim 2, characterized in that: Each of the pads (7) is provided with a clamping block (8), and the clamping block (8) abuts against an adjacent pad (7) or column (6).

5. The anti-cracking prefabricated box beam according to claim 1, characterized in that: The arc-shaped member (4) and the counterweight (5) are pulled together by a connecting rope, and the connecting rope is also arranged to be a plurality of steel wires wound around each other.

6. The anti-cracking prefabricated box beam according to claim 1, characterized in that: A cushion layer (9) is fixedly arranged between the arc-shaped member (4) and the inner wall of the box beam (1).

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