A quick-release precast box girder sealing and anchoring device

Abstract

This utility model relates to a quick-release precast box girder anchoring device, which includes an anchor plate protruding from the end of the box girder and multiple steel strands passing through the anchor plate. It also includes a pair of symmetrically arranged anchoring templates, a hinge between one side of the pair of anchoring templates, a fastener between the other side of the pair of anchoring templates, and a grouting port on one of the anchoring templates. The pair of anchoring templates are tightly fitted onto the anchor plate and cover the steel strands, with the grouting port located close to the exposed steel strands. This utility model improves production efficiency and the appearance quality of the anchored end.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge prefabricated component production, and in particular to a quick-release prefabricated box girder anchor sealing device. Background Technology

[0002] The box girder is hollow inside, with flanges on both sides of the upper part, resembling a box. In the analysis of the box girder, the main loads acting on it are dead load and live load. Dead load is symmetrical, and the cross-section of the box girder is also basically symmetrical, so dead load generally does not produce eccentric effects; live load can be symmetrical or asymmetrical eccentric effects, and must be considered separately. Under eccentric loads, the box girder will produce four basic deformation states: longitudinal bending, torsion, distortion, and transverse deflection. In the existing prestressed duct grouting construction process of box girders, to avoid inadequate sealing between the anchor plate and the steel strand, which would lead to substandard vacuum during duct grouting, cement mortar is used to seal the ends of the anchor plate before grouting.

[0003] Existing anchor sealing devices typically utilize cylindrical anchor sealing templates directly placed over the anchor plate and steel strands, followed by grouting for sealing. Once the anchor sealing concrete reaches the predetermined design strength, the templates can be removed to complete the concrete curing process. However, during this process, a certain degree of adhesion develops between the anchor sealing concrete and the templates. Directly removing the templates can easily lead to concrete spalling at the anchor end. This spalling not only reduces production efficiency, as additional time and resources are required to handle the spalled concrete, but also negatively impacts the appearance of the anchor end, thus lowering production quality. Utility Model Content

[0004] The present invention aims to address the aforementioned shortcomings in the existing technology by providing a quick-release precast box girder anchoring device, which has the advantages of improving production efficiency and the appearance quality of the anchoring end.

[0005] The above-mentioned objective of this utility model is achieved through the following technical solution:

[0006] A quick-release precast box girder anchor sealing device includes an anchor plate protruding from the end of the box girder and multiple steel strands passing through the anchor plate. It also includes a pair of symmetrically arranged anchor sealing templates, a hinge between one side of the pair of anchor sealing templates, a fastener between the other side of the pair of anchor sealing templates, and a grouting port opened on one of the anchor sealing templates. The pair of anchor sealing templates are tightly fitted onto the anchor plate and cover the steel strands. The grouting port is arranged close to the exposed steel strands.

[0007] By adopting the above technical solution, when it is necessary to seal the anchor plates at the ends of the box girder, the operator can first connect the sealing templates together by rotating them with hinges, and then put the sealing templates on the anchor plates. At this time, the inner surface of the sealing templates is in close contact with the outer surface of the anchor plates, and the grouting port is arranged close to the exposed steel strands to facilitate subsequent grouting and sealing operations. Subsequently, the operator can use fasteners to fix the pair of sealing templates together, and a grouting space is formed between the pair of sealing templates to inject sealing concrete. After the sealing concrete reaches the predetermined design strength, the operator can loosen the fasteners to remove the sealing templates. Since the pair of sealing templates is a split structure, it is easy to remove the sealing templates without damaging the concrete at the sealing end, thereby ensuring production efficiency and the appearance quality of the sealing end.

[0008] The present invention is further configured such that: the sealing anchor template includes an arc-shaped side plate that fits against the outer surface of the anchor plate, and a semi-circular end plate disposed at the end of the arc-shaped side plate away from the anchor plate.

[0009] By adopting the above technical solution, the fitting design of the arc-shaped side plate and the outer surface of the anchor plate allows the sealing template to fit tightly onto the anchor plate during installation, effectively preventing grout leakage during grouting and improving the sealing performance and effect of the anchor. The design of the semi-circular end plate further enhances the structural strength of the sealing template, enabling it to remain stable during grouting and subsequent curing, and preventing deformation or damage.

[0010] The present invention is further configured such that: the fastener includes a pad disposed on the arc-shaped side plate, a fastening bolt passing through the pair of pads, and a fastening nut threadedly connected to the fastening bolt and tightly abutting against one of the pads.

[0011] By adopting the above technical solution, the operator can first insert the fastening bolts onto the pair of washers, then thread the fastening nuts onto the fastening bolts and tighten them to securely connect the pair of sealing and anchoring templates together, thereby ensuring that the sealing and anchoring templates will not move or leak during the grouting process, thus guaranteeing the quality and effect of the sealing and anchoring.

[0012] The present invention is further configured such that: at least two fastening nuts are provided and are arranged at equal intervals along the length direction of the sealing and anchoring mold, and the fastening bolts and fastening nuts are arranged in a one-to-one correspondence.

[0013] By adopting the above technical solution, the number of fastening nuts can be adjusted according to actual needs to adapt to different sizes of sealing and anchoring templates and grouting pressure requirements, thereby improving the applicability and flexibility of the device.

[0014] The present invention is further configured such that the grouting port is opened on the arc-shaped side plate of one of the sealing and anchoring templates.

[0015] By adopting the above technical solution and designing the location of the grouting port, the grouting operation can be carried out conveniently and quickly, while ensuring the uniformity and integrity of the grouting, further improving the quality and efficiency of the anchor sealing.

[0016] The present invention is further configured to include a release agent coating disposed on the inner surface of the sealing and anchoring template.

[0017] By adopting the above technical solution, the release agent coating can reduce the adhesion between the grout and the sealing template, making it easier for the sealing template to detach from the grout after the grout has solidified. This further improves production efficiency and avoids damage to the concrete at the sealing end caused by removing the sealing template, thus ensuring the appearance quality of the sealing end.

[0018] The present invention is further configured to include an adhesive layer disposed between the anchor plate and the release agent coating.

[0019] By adopting the above technical solution, the adhesive layer is used to enhance the bonding force between the sealing template and the anchor plate, so that the sealing template can be more stably attached to the anchor plate during installation, further preventing the leakage of grout during the grouting process and improving the sealing performance and effect of the sealing.

[0020] The present invention is further configured such that the adhesive layer is composed of hot melt adhesive.

[0021] By adopting the above technical solution, the hot melt adhesive has good bonding performance and stability, which can provide sufficient bonding force during the installation of the anchor template to ensure a tight bond between the anchor template and the anchor plate. At the same time, the hot melt adhesive is not easily affected by the grout during the grouting process, thus ensuring the sealing and effect of the anchor. Furthermore, the bonding force can be reduced by heating during removal to facilitate the disassembly of the anchor template.

[0022] In summary, the beneficial technical effects of this utility model are as follows: it provides a quick-release precast box girder sealing and anchoring device with a simple structure and convenient operation. Through the design of the split-structure sealing and anchoring template and fasteners, it realizes the rapid installation and removal of the sealing and anchoring template, effectively avoids the problem of concrete peeling off at the sealing and anchoring end, and improves production efficiency and the appearance quality of the sealing and anchoring end. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the quick-release precast box girder sealing and anchoring device of this utility model.

[0024] Figure 2 This is a top view of the quick-release precast box girder sealing and anchoring device of this utility model.

[0025] Figure 3This is a schematic diagram showing the connection relationship between the sealing and anchoring template, the release agent coating, and the adhesive layer of this utility model.

[0026] In the diagram, 1. Anchor plate; 2. Steel strand; 3. Anchor sealing template; 31. Arc-shaped side plate; 32. Semi-circular end plate; 4. Hinge; 5. Fastener; 51. Fastening bolt; 52. Fastening nut; 53. Washer plate; 6. Grouting port; 7. Release agent coating; 8. Adhesive layer. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model clearer and easier to understand, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] Reference Figure 1 and Figure 3 This utility model discloses a quick-release precast box girder anchoring device, comprising an anchor plate 1 protruding from the end of the box girder, multiple steel strands 2 passing through the anchor plate 1, a pair of symmetrically arranged anchoring templates 3, a hinge 4 between one side of the pair of anchoring templates 3, a fastener 5 between the other side of the pair of anchoring templates 3, a grouting port 6 on one of the anchoring templates 3, a release agent coating 7 on the inner surface of the anchoring template 3, and an adhesive layer 8 between the anchor plate 1 and the release agent coating 7. The pair of anchoring templates 3 are tightly fitted onto the anchor plate 1 and cover the steel strands 2, with the grouting port located close to the exposed steel strands 2, and the adhesive layer 8 composed of hot melt adhesive.

[0029] When it is necessary to seal the anchor plate 1 at the end of the box girder, the operator can first connect the sealing template 3 together by rotating it with the hinge 4, and then put the sealing template 3 onto the anchor plate 1. At this time, the inner surface of the sealing template 3 is in close contact with the outer surface of the anchor plate 1, and the grouting port 6 is arranged close to the exposed steel strand 2 to facilitate the subsequent grouting and sealing operation. Then, the operator can use fasteners 5 to fix the pair of sealing templates 3 together, and a grouting space is formed between the pair of sealing templates 3 to inject sealing concrete. The adhesive layer 8 is used to enhance the bonding force between the sealing template 3 and the anchor plate 1, so that the sealing... During installation, the anchor template 3 can fit more stably onto the anchor plate 1, further preventing grout leakage during the grouting process and improving the sealing performance and effectiveness of the anchor. After the anchor concrete reaches the predetermined design strength, the operator can loosen the fasteners 5 to remove the anchor template 3. Since the anchor template 3 is a split structure, it is easy to remove the anchor template 3 without damaging the concrete at the anchor end. Furthermore, the release agent coating 7 can reduce the adhesion between the grout and the anchor template 3, making it easier for the anchor template 3 to detach from the grout after it solidifies, thereby ensuring production efficiency and the appearance quality of the anchor end.

[0030] Reference Figure 2 The anchor sealing template 3 includes an arc-shaped side plate 31 that fits against the outer surface of the anchor plate 1, and a semi-circular end plate 32 located at the end of the arc-shaped side plate 31 away from the anchor plate 1. The fitting design of the arc-shaped side plate 31 against the outer surface of the anchor plate 1 ensures that the anchor sealing template 3 fits tightly against the anchor plate 1 during installation, effectively preventing grout leakage during grouting and improving the sealing performance and effectiveness of the anchor sealing. The design of the semi-circular end plate 32 further enhances the structural strength of the anchor sealing template 3, ensuring its stability during grouting and subsequent curing, and preventing deformation or damage. Furthermore, the grouting port 6 is located on the arc-shaped side plate 31 of one of the anchor sealing templates 3, allowing for convenient and quick grouting operations while ensuring the uniformity and integrity of the grouting, further improving the quality and efficiency of the anchor sealing.

[0031] Reference Figure 2 The fastener 5 includes a pad 53 disposed on the arc-shaped side plate 31, two fastening bolts 51 passing through the pair of pads 53 and arranged at equal intervals along the length of the anchoring mold, and a fastening nut 52 threaded onto the fastening bolt 51 and tightly abutting against one of the pads 53. The operator can first pass the fastening bolts 51 through the pair of pads 53, then thread the fastening nut 52 onto the fastening bolts 51 and tighten it to securely connect the pair of anchoring molds 3 together, thereby ensuring that the anchoring molds 3 will not move or leak during grouting, guaranteeing the quality and effect of the anchoring. Furthermore, the number of fastening nuts 52 can be adjusted according to actual needs to adapt to different sizes of anchoring molds 3 and grouting pressure requirements, improving the applicability and flexibility of the device.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A quick-release precast box girder anchoring device, comprising an anchor plate (1) protruding from the end of the box girder, and a plurality of steel strands (2) passing through the anchor plate (1), characterized in that: It also includes a pair of symmetrically arranged anchor templates (3), a hinge (4) between one side of the pair of anchor templates (3), a fastener (5) between the other side of the pair of anchor templates (3), and a grouting port (6) opened on one of the anchor templates (3). The pair of anchor templates (3) are tightly fitted on the anchor plate (1) and covered on the steel strand (2). The grouting port is arranged close to the exposed steel strand (2).

2. The quick-release precast box girder anchoring device according to claim 1, characterized in that: The sealing template (3) includes an arc-shaped side plate (31) that fits against the outer surface of the anchor plate (1) and a semi-circular end plate (32) disposed at the end of the arc-shaped side plate (31) away from the anchor plate (1).

3. The quick-release precast box girder anchoring device according to claim 2, characterized in that: The fastener (5) includes a pad (53) disposed on the arc-shaped side plate (31), a fastening bolt (51) passing through the pair of pads (53), and a fastening nut (52) threaded onto the fastening bolt (51) and tightly abutting against one of the pads (53).

4. The quick-release precast box girder anchoring device according to claim 3, characterized in that: At least two fastening nuts (52) are provided and are arranged at equal intervals along the length of the sealing and anchoring mold. The fastening bolts (51) and fastening nuts (52) are arranged in a one-to-one correspondence.

5. The quick-release precast box girder anchoring device according to claim 2, characterized in that: The grouting port (6) is opened on the arc-shaped side plate (31) of one of the sealing and anchoring templates (3).

6. The quick-release precast box girder anchoring device according to claim 1, characterized in that: It also includes a release agent coating (7) disposed on the inner surface of the sealing and anchoring template (3).

7. The quick-release precast box girder anchoring device according to claim 6, characterized in that: It also includes an adhesive layer (8) disposed between the anchor plate (1) and the release agent coating (7).

8. The quick-release precast box girder anchoring device according to claim 7, characterized in that: The adhesive layer (8) is composed of hot melt adhesive.

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