Formwork fixing device for molded concrete construction

Abstract

The utility model discloses a template fixing device for molded concrete construction, which is applied to fixing an end template during molded concrete construction such as bridge construction, and comprises a sliding sleeve structure and a fastening device, the sliding sleeve structure is connected with a horizontal steel bar of a box girder web in a sliding manner, and the fastening device is arranged on the sliding sleeve structure and is used for limiting the sliding sleeve structure in a sliding manner. The connecting device is simple in structure, low in cost, convenient and fast to operate, capable of flexibly increasing and decreasing the using number according to the side pressure of concrete, good in connecting reliability, high in stability, capable of greatly improving formwork reinforcing and dismantling construction efficiency, capable of reducing fire operation, capable of improving construction safety, high in practicability and high in generalization performance.

Description

Technical Field

[0001] The utility model relates to a template fixing device for molded concrete construction, belonging to the technical field of concrete molded construction. Background Art

[0002] In cast-in-place concrete construction, formwork reinforcement is typically achieved through methods such as bracing, screw-rod tensioning, or spot welding anchoring. This is particularly true for the construction of continuous rigid-frame bridge segments, where spot welding anchoring is commonly used to reinforce the end formwork. During the concrete pouring process, there is a risk of formwork loss due to inadequate welding. This can also easily ignite the foam adhesive and other materials used to seal leaks. If formwork loss occurs at the anchor pad, it can impact project quality. Furthermore, spot welding anchoring requires on-site, high-altitude hot work, which is time-consuming and labor-intensive, posing a significant safety hazard. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a formwork fixing device for cast concrete construction, so as to at least solve the problems mentioned in the background art.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A formwork fixing device for cast-in-place concrete construction is used to fix the end formwork during the construction of cast-in-place concrete, such as continuous rigid frame bridge segments. The device includes a sliding sleeve structure and a fastening device. The sliding sleeve structure is slidably connected to the horizontal steel bars of the box beam web. The fastening device is arranged on the sliding sleeve structure and is used to limit the sliding of the sliding sleeve structure.

[0006] Furthermore, the sliding sleeve structure includes a channel steel, a conical movable sleeve is provided in the middle of the channel steel, and conical fixed sleeves adapted to the conical movable sleeve are provided on both sides of the conical movable sleeve, and the conical movable sleeve can slide along the oblique side of the conical fixed sleeve, and the axial holes of the conical movable sleeve and the conical fixed sleeve are coaxial with the horizontal steel bars of the box beam web and are slidably connected thereto, and a circular hole opposite to the position of the conical movable sleeve is provided on one side of the channel steel, and a threaded seat is provided at the circular hole, and the fastening device includes a fastening bolt arranged on the threaded seat, and the fastening bolt passes through the circular hole and abuts against the conical movable sleeve.

[0007] Furthermore, the conical movable sleeve and the conical fixed sleeve are formed by cutting and splicing an integral cylindrical sleeve, the conical fixed sleeve is fixedly connected to both sides of the groove of the channel steel by welding, the conical movable sleeve is arranged between the two conical fixed sleeves, and the hypotenuse of the conical movable sleeve is parallel to the hypotenuse of the conical fixed sleeve and a sliding gap is left.

[0008] Furthermore, the tapered angle of the tapered movable sleeve is 75-80 degrees.

[0009] Furthermore, the horizontal steel bars of the box girder web are threaded steel bars, and an internal thread structure is provided in the axial holes of the conical movable sleeve and the conical fixed sleeve. After the conical movable sleeve slides, a tooth-shaped interlocking and engaging structure is formed between the conical movable sleeve, the conical fixed sleeve and the horizontal steel bars of the box girder web through the thread.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] The utility model has the advantages of simple structure, low cost, convenient and quick operation, and the number of units used can be flexibly increased or decreased according to the lateral pressure of the concrete. It has good connection reliability and high stability, can greatly improve the efficiency of formwork reinforcement and dismantling construction, can also reduce hot work and improve construction safety, has strong practicality and high promotion potential.

[0012] Other advantages, objectives, and features of the present invention will be described in detail in the following description and, to some extent, will be apparent to those skilled in the art upon examination and study of the following or may be learned from practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings, in which:

[0014] Figure 1 A schematic diagram of the three-dimensional structure of a formwork fixing device for molded concrete construction provided in Example 1 of the present utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the middle sliding sleeve structure;

[0016] Figure 3 for Figure 1 Schematic diagram of the cross-section structure of the middle sliding sleeve structure;

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of the sliding sleeve structure provided in Example 2 of the present utility model.

[0018] In the figure: 1. End formwork; 2. Sliding sleeve structure; 201. Channel steel; 202. Conical movable sleeve; 203. Conical fixed sleeve; 204. Threaded seat; 3. Fastening device; 301. Fastening bolt; 302. Conical fastening block; 4. Horizontal web reinforcement; 401. Threaded reinforcement; 5. Pad; 6. Internal thread structure. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example 1

[0021] like Figure 1-Figure 3 As shown, taking the reinforcement construction of the end formwork 1 during the construction of a continuous rigid frame bridge segment as an example, in order to improve the construction efficiency of the installation and reinforcement of the end formwork 1 and reduce hot work, the first embodiment of the utility model provides a formwork fixing device for cast concrete construction, which includes a sliding sleeve structure 2 and a fastening device 3. The sliding sleeve structure 2 is slidably connected to the horizontal steel bars 4 of the box beam web, and the fastening device 3 is arranged on the sliding sleeve structure 2 for sliding limitation of the sliding sleeve structure 2.

[0022] The sliding sleeve structure 2 includes a channel steel 201, a conical movable sleeve 202 is provided in the middle of the channel steel 201, and conical fixed sleeves 203 adapted to it are provided on both sides of the conical movable sleeve 202, and the conical movable sleeve 202 can slide along the oblique side of the conical fixed sleeve 203, and the axial holes of the conical movable sleeve 202 and the conical fixed sleeve 203 are coaxial with the horizontal steel bars 4 of the box beam web and are slidably connected thereto, and a circular hole opposite to the position of the conical movable sleeve 202 is provided on one side of the channel steel 201, and a threaded seat 204 is provided at the circular hole, and the fastening device 3 includes a fastening bolt 301 arranged on the threaded seat 204, and the fastening bolt 301 penetrates the circular hole and abuts against the conical movable sleeve 202.

[0023] Specifically, the conical movable sleeve 202 and the conical fixed sleeve 203 are formed by cutting and splicing an integral cylindrical sleeve. The conical fixed sleeve 203 is fixedly connected to both sides of the groove of the channel steel 201 by welding. The conical movable sleeve 202 is arranged between the two conical fixed sleeves 203, and the hypotenuse of the conical movable sleeve 202 is parallel to the hypotenuse of the conical fixed sleeve 203 and a sliding gap is left.

[0024] The cone angle of the cone movable sleeve 202 is 75-80 degrees.

[0025] In this embodiment, a pad 5 is further provided on the side of the sliding sleeve structure 2 close to the end template 1 .

[0026] Working principle and process of the device:

[0027] When installing the box girder reinforcement, the web horizontal reinforcement 4 used for anchoring needs to be firmly welded to the web horizontal reinforcement 4 reserved in the adjacent constructed bridge segment. After the reinforcement is installed, the formwork on both sides is installed, checked and reinforced, and then the end formwork 1 is installed at the end of the formwork of the bridge segment to be constructed. The web horizontal reinforcement 4 passes through the opening on the side of the end formwork 1, and the conical movable sleeve 202 and the conical fixed sleeve 203 of the sliding structure are inserted into the horizontal reinforcement 4 until they are against the end formwork 1, and then the fastening bolt 301 is adjusted so that the end of the fastening bolt 301 can be against the conical movable sleeve 202 to move and press the horizontal reinforcement 4 until the reinforcement is slightly bent. The purpose of locking the end formwork 1 is achieved by utilizing the self-locking force of the fastening bolt 301 thread and the transverse shear force of the conical movable sleeve 202 on the reinforcement to the tensile force generated by the slight bending of the reinforcement.

[0028] Example 2

[0029] like Figure 4 As shown, the second embodiment of the present invention provides a formwork fixing device for cast concrete construction. Furthermore, the horizontal reinforcement 4 of the box girder web is a threaded steel bar 401, and internal threads 6 are provided within the axial holes of the tapered movable sleeve 202 and the tapered fixed sleeve 203. During use, the tapered movable sleeve 202 slides along the hypotenuse of the tapered fixed sleeve 203, pressing the horizontal reinforcement 4 until the reinforcement is slightly bent. Simultaneously, the internal threads 6 within the axial holes of the tapered movable sleeve 202 and the tapered fixed sleeve 203 form a tooth-like interlocking structure with the threads of the horizontal reinforcement 4 of the box girder web. This ensures a better fastening effect and greatly improves the reliability and safety of the connection.

[0030] The above description is only a preferred embodiment of the present invention and does not constitute any form of confidentiality restriction on the present invention. Any simple modification, equivalent change and modification of the above embodiment made based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A formwork fixing device for cast concrete construction, which is used for fixing the end formwork (1) during cast concrete construction, such as bridge construction, and is characterized in that: It comprises a sliding sleeve structure (2) and a fastening device (3), wherein the sliding sleeve structure (2) is slidably connected to the horizontal steel bars (4) of the box beam web, and the fastening device (3) is arranged on the sliding sleeve structure (2) and is used for sliding limitation of the sliding sleeve structure (2); The sliding sleeve structure (2) includes a channel steel (201), a conical movable sleeve (202) is provided in the middle of the channel steel (201), and conical fixed sleeves (203) adapted thereto are provided on both sides of the conical movable sleeve (202), and the conical movable sleeve (202) can slide along the oblique side of the conical fixed sleeve (203), the axial holes of the conical movable sleeve (202) and the conical fixed sleeve (203) are coaxial with the horizontal steel bar (4) of the box beam web and are slidably connected thereto, a circular hole is provided on one side of the channel steel (201) and is opposite to the conical movable sleeve (202), and a threaded seat (204) is provided at the circular hole, and the fastening device (3) includes a fastening bolt (301) provided on the threaded seat (204), and the fastening bolt (301) penetrates the circular hole and abuts against the conical movable sleeve (202).

2. The formwork fixing device for molded concrete construction according to claim 1, characterized in that: The conical movable sleeve (202) and the conical fixed sleeve (203) are formed by cutting and splicing an integral cylindrical sleeve, and the conical fixed sleeve (203) is fixedly connected to both sides of the groove of the channel steel (201) by welding. The conical movable sleeve (202) is arranged between the two conical fixed sleeves (203), and the oblique side of the conical movable sleeve (202) is parallel to the oblique side of the conical fixed sleeve (203) and a sliding gap is left.

3. The formwork fixing device for molded concrete construction according to claim 2, characterized in that: The tapered angle of the tapered movable sleeve (202) is 75-80 degrees.

4. The formwork fixing device for molded concrete construction according to any one of claims 1 to 3, characterized in that: The box girder web horizontal steel bar (4) is a threaded steel bar (401), and an internal thread structure (6) is provided in the axial holes of the tapered movable sleeve (202) and the tapered fixed sleeve (203). After the tapered movable sleeve (202) slides, a tooth-shaped interlocking occlusal structure is formed between the tapered movable sleeve (202), the tapered fixed sleeve (203) and the box girder web horizontal steel bar (4) through the thread.

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