A prefabricated box girder anchor hole sealing device

Abstract

The utility model relates to a prefabricated box girder anchor hole seal anchor device, it includes the anchor plate embedded in the box girder anchor hole, and at least two anchor bars are worn in the anchor plate, still include the seal anchor end mould, set up in the seal anchor end mould and communicate in the grouting bucket of beam end anchor hole, set up at least two screw rod pairs on the seal anchor end mould, and the threaded sleeve of mobile end of screw rod pair can be detachably connected, the seal anchor end mould is tightly contacted with the box girder end, to be used for shielding the opening of beam end anchor hole, the threaded sleeve is threadedly connected in the end of anchor bar. The utility model has the advantages of improving the seal anchor efficiency, guaranteeing the appearance quality of seal anchor end.

Description

Technical Field

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

[0002] During the construction of precast box girders, to ensure the smooth tensioning of prestressed steel bars, engineers typically design pre-reserved holes in the top slab of the box girder as passageways for construction equipment and materials, facilitating subsequent tensioning operations. After the prestressed steel bar tensioning is completed, the holes need to be sealed. Construction workers insert anchor bars into the holes, ensuring a certain length of the anchor bar ends protrude. Subsequently, concrete is poured into the holes to fix the anchor bar positions. After the concrete hardens, the exposed anchor bar portions need to be cut to maintain the neatness and aesthetics of the structure. After cutting, construction workers use steel molds to cover the cut anchor bar portions to protect them from external environmental influences. To ensure the quality of the sealing, a layer of high-strength concrete is poured over the anchor bar covered by the steel mold, completing the final step of sealing. However, in actual construction, especially during the sealing operation at the ends of the box girder, many challenges are faced. Because the sealing position is located in a vertical plane, the steel mold must accurately cover the exposed anchor bar, which usually requires manual positioning by workers. After positioning is completed, another worker begins pouring concrete. This process is time-consuming and requires good cooperation among workers; otherwise, it can easily lead to low efficiency in the anchor sealing operation. Utility Model Content

[0003] The present invention aims to address the aforementioned shortcomings in the existing technology by providing a precast box girder anchorage sealing device, which has the advantages of improving sealing efficiency and ensuring the appearance quality of the sealing end.

[0004] The above-mentioned objective of this utility model is achieved through the following technical solution:

[0005] An anchor sealing device for a precast box girder includes an anchor plate embedded in the anchor cavity of the box girder and at least two anchor bars passing through the anchor plate. It also includes an anchor sealing end mold, a grouting bucket disposed on the anchor sealing end mold and connected to the anchor cavity at the end of the girder, at least two screw pairs disposed on the anchor sealing end mold, and a threaded sleeve detachably connected to the movable end of the screw pairs. The anchor sealing end mold is in close contact with the end of the box girder to cover the opening of the anchor cavity at the end of the girder, and the threaded sleeve is threadedly connected to the end of the anchor bar.

[0006] By adopting the above technical solution, the tension of the anchor bar can be finely adjusted by adjusting the position of the threaded sleeve on the screw pair. This not only positions the anchor bar but also forces the sealing end mold to tightly contact the end of the box girder, further improving the accuracy and efficiency of the sealing operation. Then, concrete grout is injected into the anchor cavity at the beam end using a grouting bucket. The concrete grout flows into the anchor cavity at the beam end along the grouting bucket and gradually fills it until the concrete grout completely covers the anchor bar and solidifies, thus fixing the anchor bar. During the grouting process, because the sealing end mold tightly contacts the end of the box girder, leakage of concrete grout is effectively prevented, ensuring the cleanliness of the sealing operation and the appearance quality of the sealing end. It has the advantages of simple structure, convenient operation, high sealing efficiency, and reliable sealing quality, and is suitable for the sealing operation of various precast box girders.

[0007] The present invention is further configured to include a first gripping part disposed on the sealing anchor end mold.

[0008] By adopting the above technical solution, it is easier for users to grasp and apply force.

[0009] The present invention is further configured such that the inner surface of the grouting hopper is configured as a guide slope.

[0010] By adopting the above technical solution, it is beneficial to guide the concrete slurry to flow smoothly into the anchor hole at the beam end, and reduce the resistance during grouting.

[0011] The present invention is further configured such that: the screw pair includes a transmission nut rotatably connected to the outer surface of the sealing end mold, and a transmission screw threadedly connected to the transmission nut, one end of the transmission screw passing through the sealing end mold and threadedly connected to the threaded sleeve.

[0012] By adopting the above technical solution, the cooperation between the transmission nut and the transmission screw makes the position adjustment of the threaded sleeve on the screw pair more flexible and stable, thereby fixing the anchor bar and further improving the reliability and efficiency of the anchor sealing operation. In addition, the rotating connection design of the transmission nut and the transmission screw also helps to reduce the impact force on the anchor sealing end mold when adjusting the anchor bar tension, protecting the integrity of the anchor sealing end mold and extending its service life.

[0013] The present invention is further configured such that the screw pair also includes a second gripping part disposed on the transmission screw.

[0014] By adopting the above technical solution, it is easier for users to grasp and apply force.

[0015] The present invention is further configured to include a release agent coating disposed on the inner surface of the sealing anchor end mold.

[0016] By adopting the above technical solution, the release agent coating can effectively reduce the adhesion between the sealing end mold and the concrete slurry. After the sealing operation is completed, it is easy to remove the sealing end mold from the solidified concrete. This not only improves construction efficiency, but also helps to protect the surface of the sealing end mold, reduces wear caused by repeated use, and extends the service life of the sealing end mold.

[0017] The present invention is further configured to include an adhesive layer disposed between the release agent coating and the end of the box girder.

[0018] By adopting the above technical solution, the adhesive layer is used to enhance the bonding force between the release agent coating and the end of the box girder, preventing the release agent coating from falling off or shifting due to the pressure of the concrete slurry during the grouting process. This ensures that the sealing end mold can stably and tightly abut against the end of the box girder, further improving the reliability and stability of the sealing operation.

[0019] The present invention is further configured such that the adhesive layer is composed of expanding foam.

[0020] By adopting the above technical solution, the foam has good adhesion and filling properties, which can fully fill the tiny gaps between the release agent coating and the box girder end to form a strong bonding layer. At the same time, the lightweight properties of the foam also help to reduce the overall weight of the sealing and anchoring device, making construction easier.

[0021] In summary, the beneficial technical effects of this utility model are as follows: The anchor sealing device for precast box girders provided by this utility model, through ingenious design, achieves precise positioning and fixing of anchor bars, while improving the efficiency and quality of anchor sealing operations. It has the advantages of simple structure, convenient operation, high anchor sealing efficiency, and reliable anchor sealing quality. It is suitable for anchor sealing operations of various precast box girders and has broad market application prospects. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main structure of the precast box girder anchorage sealing device of this utility model.

[0023] Figure 2 This is a three-dimensional structural schematic diagram of the precast box girder anchorage sealing device of this utility model.

[0024] Figure 3 This is a schematic diagram showing the connection relationship between the sealing end mold, the release agent coating, and the adhesive layer of this utility model.

[0025] In the diagram, 1 is the anchor plate; 2 is the anchor bar; 3 is the sealing end mold; 4 is the first gripping part; 5 is the grouting bucket; 6 is the screw pair; 61 is the transmission nut; 62 is the transmission screw; 63 is the second gripping part; 7 is the threaded sleeve; 8 is the release agent coating; and 9 is the adhesive layer. Detailed Implementation

[0026] 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.

[0027] Reference Figure 1 and Figure 2 This utility model discloses a precast box girder anchorage sealing device, comprising an anchor plate 1 embedded in the box girder anchorage, two anchor bars 2 passing through the anchor plate 1, an anchorage sealing end mold 3, a first gripping part 4 disposed on the anchorage sealing end mold 3, a grouting hopper 5 disposed on the anchorage sealing end mold 3 and connected to the beam end anchorage, two screw pairs 6 disposed on the anchorage sealing end mold 3, and a threaded sleeve 7 detachably connected to the moving end of the screw pairs 6. The anchorage sealing end mold 3 is in close contact with the end of the box girder to cover the opening of the beam end anchorage, the threaded sleeve 7 is threaded to the end of the anchor bar 2, and the inner surface of the grouting hopper 5 is configured as a guide slope (not shown in the figure).

[0028] By adjusting the position of the threaded sleeve 7 on the screw pair 6, the tension of the anchor bar 2 can be finely adjusted. This not only positions the anchor bar 2 but also forces the sealing end mold 3 to tightly abut against the end of the box girder, further improving the accuracy and efficiency of the sealing operation. Then, concrete grout is injected into the anchor cavity at the beam end using the grouting bucket 5. The concrete grout flows into the anchor cavity at the beam end along the grouting bucket 5 and gradually fills it until the concrete grout completely covers the anchor bar 2 and solidifies, thus fixing the anchor bar 2. During the grouting process, because the sealing end mold 3 tightly abuts against the end of the box girder, leakage of concrete grout is effectively prevented, ensuring the cleanliness of the sealing operation and the appearance quality of the sealing end. It has the advantages of simple structure, convenient operation, high sealing efficiency, and reliable sealing quality, and is suitable for sealing operations of various precast box girders.

[0029] Reference Figure 2 The screw assembly 6 includes a transmission nut 61 rotatably connected to the outer surface of the anchoring end mold 3, a transmission screw 62 threadedly connected to the transmission nut 61, and a second gripping part 63 disposed on the transmission screw 62. One end of the transmission screw 62 passes through the anchoring end mold 3 and is threadedly connected to the threaded sleeve 7. The cooperation between the transmission nut 61 and the transmission screw 62 makes the position adjustment of the threaded sleeve 7 on the screw assembly 6 more flexible and stable, achieving the fixation of the anchor bar 2 and further improving the reliability and efficiency of the anchoring operation. Furthermore, the rotatable connection design of the transmission nut 61 and the transmission screw 62 helps reduce the impact force on the anchoring end mold 3 when adjusting the tension of the anchor bar 2, protecting the integrity of the anchoring end mold 3 and extending its service life.

[0030] Reference Figure 3The inner surface of the sealing end mold 3 is coated with a release agent coating 8, and an adhesive layer 9 composed of expanding foam is placed between the release agent coating 8 and the end of the box girder. The release agent coating 8 effectively reduces the adhesion between the sealing end mold 3 and the concrete grout, making it easier to remove the sealing end mold 3 from the solidified concrete after the sealing operation is completed. This not only improves construction efficiency but also helps protect the surface of the sealing end mold 3, reducing wear caused by repeated use and extending its service life. The adhesive layer 9 enhances the bonding force between the release agent coating 8 and the end of the box girder, preventing the release agent coating 8 from falling off or shifting due to the pressure of the concrete grout during grouting. This ensures that the sealing end mold 3 can stably and tightly abut against the end of the box girder, further improving the reliability and stability of the sealing operation. The expanding foam has good adhesion and filling properties, which can fully fill the tiny gaps between the release agent coating 8 and the end of the box girder, forming a strong bonding layer. At the same time, the lightweight nature of the expanding foam also helps to reduce the overall weight of the sealing device, facilitating construction operations.

[0031] 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 precast box girder anchorage sealing device, comprising an anchor plate embedded in the box girder anchorage and at least two anchor bars passing through the anchor plate, characterized in that: It also includes a sealing end mold, a grouting bucket disposed on the sealing end mold and connected to the beam end anchor hole, at least two screw pairs disposed on the sealing end mold, and a threaded sleeve detachably connected to the moving end of the screw pairs. The sealing end mold is in close contact with the end of the box girder to cover the opening of the beam end anchor hole, and the threaded sleeve is threadedly connected to the end of the anchor bar.

2. The precast box girder anchorage sealing device according to claim 1, characterized in that: It also includes a first gripping part disposed on the sealing anchor end mold.

3. The anchor sealing device for precast box girder anchorages according to claim 1, characterized in that: The inner surface of the grouting hopper is configured as a guide slope.

4. The precast box girder anchorage sealing device according to claim 1, characterized in that: The screw assembly includes a transmission nut rotatably connected to the outer surface of the sealing end mold, and a transmission screw threadedly connected to the transmission nut. One end of the transmission screw passes through the sealing end mold and is threadedly connected to the threaded sleeve.

5. The precast box girder anchorage sealing device according to claim 1, characterized in that: The screw assembly also includes a second gripping portion disposed on the transmission screw.

6. The precast box girder anchorage sealing device according to claim 1, characterized in that: It also includes a release agent coating disposed on the inner surface of the sealing anchor end mold.

7. The precast box girder anchorage sealing device according to claim 6, characterized in that: It also includes an adhesive layer disposed between the release agent coating and the end of the box girder.

8. The anchor sealing device for precast box girder anchorages according to claim 7, characterized in that: The adhesive layer is composed of expanding foam.

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