Steel reinforced concrete column formwork positioning structure and construction method

Abstract

The invention provides a steel reinforced concrete column formwork positioning structure and a construction method.The steel reinforced concrete column formwork positioning structure comprises a plurality of formworks surrounding profile steel, reinforcing steel pipes are arranged on the outer sides of the formworks, a plurality of pairs of studs and threaded positioning sleeves are vertically welded to the outer sides of flange plates of profile steel columns, and lead screws penetrating through the formworks are connected into the threaded positioning sleeves; a conical rubber plug is connected in the lead screw in a sleeved mode, the conical rubber plug is located between the formwork and the threaded positioning sleeve, and the lead screw is fixed to the reinforcing steel pipe through the reinforcing steel pipe, the E-shaped clamp and the double nuts. The threaded positioning sleeve is vertically and fixedly connected to the outer side of the flange plate of the profile steel, the formwork and the reinforcing steel pipe on the outer side are connected through the lead screw, the positions of the formwork and the reinforcing steel pipe are adjusted by adjusting the extending length of the lead screw, and the distance between the formwork and the threaded positioning sleeve can be conveniently determined through the conical rubber plug in the middle of the lead screw; therefore, accurate installation of the formwork and the reinforcing steel pipe is guaranteed.

Description

Technical Field

[0001] This application belongs to the technical field of building construction, and particularly relates to a formwork positioning structure and construction method for a steel reinforced concrete column. Background Art

[0002] The steel reinforced concrete structure, also known as the stiffened reinforced concrete, refers to adding steel sections to the traditional reinforced concrete structure. This structure has the characteristics of high strength, great rigidity, and good ductility compared with the traditional reinforced concrete; under the same structural strength, the cross-sectional area of the steel reinforced concrete structure is smaller than that of the reinforced concrete. Therefore, the use of the steel reinforced concrete structure greatly improves the space inside the building and is particularly suitable for high-rise buildings and buildings with large spans and large openings in actual construction projects. However, the steel reinforced concrete structure is often used in public buildings with higher storeys or large spans, and generally the cross-sectional area of the steel reinforced concrete column is also relatively large. Therefore, during construction, the formwork erection and positioning of the steel reinforced concrete column are important links in the construction quality of the steel reinforced concrete structure.

[0003] In the current reinforcement of the steel column formwork, the center of it is a cross-shaped steel column, and the tie bolts used to reinforce the steel column formwork cannot directly pass through the middle of the steel column. In the past, the construction generally adopted the method of welding a single-headed bolt to the stud on the cross-shaped steel column and tightening it. The measure cost for the positioning of the concrete steel in this part is relatively high, increasing the construction expenditure. Moreover, when the steel section is in place, because it is not convenient to move, it is very inconvenient to adjust the steel section, and errors are likely to occur, resulting in difficulty in ensuring the construction quality. Summary of the Invention

[0004] This application provides a formwork positioning structure and construction method for a steel reinforced concrete column to solve the above technical problems.

[0005] To solve the above technical problems, a technical solution adopted in this application is: a formwork positioning structure for a steel reinforced concrete column, including multiple formworks surrounding the steel section. Reinforcing steel pipes are arranged outside the formworks. Multiple pairs of studs and threaded positioning sleeves are perpendicularly welded to the outer side of the flange plate of the steel column. A lead screw passing through the formwork is connected in the threaded positioning sleeve. A conical rubber plug is sleeved in the lead screw, and the conical rubber plug is located between the formwork and the threaded positioning sleeve. The lead screw is fixed to the reinforcing steel pipe through the reinforcing steel pipe, U-shaped clamps, and double nuts.

[0006] Further, the steel section is formed by cutting and welding four I-shaped steel sections, and the cross-section of the steel section is in a square shape with a cross in the middle.

[0007] Further, in the vertical direction, the threaded positioning sleeves are located between the studs, and the adjacent threaded positioning sleeves are spaced 2 m apart.

[0008] Further, in the horizontal direction, the threaded positioning sleeves are located outside the studs.

[0009] Furthermore, the threaded positioning sleeve is made of round steel, wherein one end of the threaded positioning sleeve is provided with an internal thread hole with a depth of 50 mm.

[0010] Furthermore, the template includes a thick wooden board and secondary keels, and a plurality of groups of secondary keels are vertically fixed to the outer side of the thick wooden board.

[0011] A technical solution adopted in this application is: a steel-concrete column formwork positioning construction method, comprising the following steps:

[0012] Steel section hoisting: lift the steel section by crane and place it vertically into the steel section socket.

[0013] Rigid column reinforcement binding: When tying reinforcement on the outside of the steel section, first install the vertical reinforcement, use straight thread connection for the vertical reinforcement joints, and then tie the stirrups from bottom to top;

[0014] Installation of custom device: first screw the tapered rubber plug onto the screw rod, so that the screw rod is exposed 45-48mm from the small end of the tapered rubber plug, and then screw the exposed screw rod into the threaded positioning sleeve, making sure that the small end of the tapered rubber plug abuts against the end of the threaded positioning sleeve;

[0015] Rigid column mold closing: After the positioning device is installed, the rigid column formwork is hoisted in pieces; the formwork positioning device is fixed with a combination of φ48×3 steel pipes, mountain-shaped clamps and double nuts, and then the column is reinforced by using square and round buckles;

[0016] Concrete pouring of rigid columns: When pouring the concrete of rigid columns, it should be poured in layers, and the height of each layer should not exceed 3m; the concrete of beams and slabs should be poured separately from the concrete of rigid columns. After the concrete of rigid columns reaches the predetermined strength, the concrete of beams and slabs should be poured. The joints between beams and slabs and the tops of columns should be treated by construction joint treatment;

[0017] Demoulding: When removing the mould, first remove the square and round buckles from top to bottom, then remove the positioning device from top to bottom, and finally remove the template; unscrew the screw rod 50mm so that its end is screwed out of the threaded positioning sleeve; pull out the conical rubber plug through the thread of the conical rubber plug hole and the screw thread teeth; clean the garbage in the cup mouth hole left after removing the conical rubber plug, and use micro-expansion mortar to grout the hole.

[0018] The beneficial effects of the present application are as follows: the present application vertically fixes a threaded positioning sleeve on the outer side of the flange plate of the steel section, connects the outer template and the reinforced steel pipe through a screw rod, and adjusts the position of the template and the reinforced steel pipe by adjusting the extension length of the screw rod. The conical rubber plug in the middle of the screw rod can facilitate the determination of the distance between the template and the threaded positioning sleeve, thereby ensuring the accurate installation of the template and the reinforced steel pipe. At the same time, when the pouring is completed, the conical rubber plug can be pulled out of the concrete column by the screw rod for easy recycling, thereby reducing the loss of workpieces and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a top view of an embodiment of a steel-concrete column formwork positioning structure of the present application;

[0020] Figure 2 yes Figure 1 A schematic structural diagram of an embodiment of a tapered rubber stopper;

[0021] Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure of an embodiment of a steel section;

[0022] Figure 4 yes Figure 1 A side structural schematic diagram of an embodiment of a bolt and a threaded positioning sleeve;

[0023] Figure 5 yes Figure 4 A schematic cross-sectional view of an embodiment of a bolt and a threaded positioning sleeve;

[0024] Figure 6 yes Figure 1 A schematic cross-sectional structure diagram of an embodiment of the template;

[0025] Figure 7 It is a side structural schematic diagram of an embodiment of a steel-concrete column formwork positioning structure of the present application;

[0026] Figure 8 It is a flow chart of an embodiment of the steel-concrete column formwork positioning construction method of the present application. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0029] See also Figure 1-2 , Figure 1 It is a structural schematic diagram of an embodiment of a steel-concrete column formwork positioning structure of the present application; Figure 2 yes Figure 1A schematic diagram of the structure of an embodiment of a conical rubber plug in the figure. The structure includes: a plurality of templates 2 surrounding a steel section 1, a reinforcing steel pipe 3 is arranged on the outside of the template 2, a plurality of pairs of bolts 4 and a threaded positioning sleeve 5 are vertically welded on the outside of the flange plate of the steel section 1 column, a screw 6 penetrating the template 2 is connected to the threaded positioning sleeve 5, a conical rubber plug 7 is sleeved in the screw 6, the conical rubber plug 7 is located between the template 2 and the threaded positioning sleeve 5, and the screw 6 is fixed to the reinforcing steel pipe 3 by means of a reinforcing steel pipe 3, a mountain clamp 8 and a double nut 9. In the above design, the threaded positioning sleeve 5 and the conical rubber plug 7 of fixed specifications are connected by means of a screw 6 of the same length, so that the distance between the template 2 connected to the conical rubber plug 7 and the flange plate of the steel section 1 is fixed, and the position of the template 2 is fixed when the concrete of the steel section 1 is poured, so as to ensure that the template 2 and the steel section 1 column always remain coaxial.

[0030] See also Figure 3 The steel 1 is formed by cutting and welding four I-shaped steels 1, wherein the cross section of the steel 1 is in the shape of a field. The steel 1 in the above design is square as a whole, which is convenient for the construction of the outer formwork 2 and the steel bars.

[0031] See also Figure 4 In the vertical direction, the threaded positioning sleeves 5 are located between the studs 4, and the adjacent threaded positioning sleeves 5 are spaced 2 meters apart. The above design enables each template 2 to be firmly connected to the steel 1 from top to bottom, so that the template 2 and the steel 1 column always remain coaxial.

[0032] See also Figure 5 , in the horizontal direction, the threaded positioning sleeve 5 is located outside the bolt 4. The bolt 4 in the above design is used for steel bar construction.

[0033] The threaded positioning sleeve 5 is made of round steel, wherein one end of the threaded positioning sleeve 5 is provided with an inner thread hole with a diameter of 50 mm and a depth of 50 mm. The threaded positioning sleeve 5 in the above design can use φ28 round steel, which has high strength and is easy to weld. The fixed depth is convenient for the screw rod 6 to be screwed and the external length to be determined.

[0034] See also Figure 6-7 The template 2 includes a thick wood board 21 and a secondary keel 22. Multiple groups of secondary keels 22 are vertically fixed to the outside of the thick wood board 21. The template 2 is 18 mm and the secondary keel 22 is a 45×90 wood square. The secondary keel 22 in the above design can effectively squeeze the thick wood board 21 through the outer reinforcing steel pipe 3 to ensure the stability of the thick wood board 21 during pouring.

[0035] See also Figure 8 , Figure 8 This is a flow chart of an embodiment of a steel-concrete column formwork positioning construction method of the present application, the method comprising the following steps:

[0036] S1. Steel section hoisting: lift the steel section 1 by a crane and place the steel section vertically into the steel section socket.

[0037] Specifically, during lifting, the crane will slowly lift the tied steel section 1 20 cm off the ground, check that the sling is firm and the crane is stable, open the slewing brake at the same time, then lower the steel column to 40 to 100 mm from the installation surface, align it with the reference line, command the crane to descend, insert the column into the anchor bolts for temporary fixation, and after the initial correction of the steel column, the crane can be unhooked only when the verticality deviation is controlled within 20 mm. The verticality of the steel column is checked with a theodolite, and if there is any deviation, it should be corrected immediately. During the correction process, observe whether there is any gap between the bottom and the elevation control block at any time to prevent horizontal elevation errors during the correction process.

[0038] S2. Rigid column reinforcement binding: When binding the reinforcement on the outside of the steel section 1, first install the vertical reinforcement 11, use straight thread connection for the vertical reinforcement joints, and then bind the stirrups 12 from bottom to top.

[0039] S3. Installation of customized device: first screw the tapered rubber plug 7 onto the screw rod 6 so that the screw rod 6 is exposed from the small end of the tapered rubber plug 7 by 45 to 48 mm, and then screw the exposed screw rod 6 into the threaded positioning sleeve 5 to ensure that the small end of the tapered rubber plug 7 is in contact with the end of the threaded positioning sleeve 5.

[0040] Specifically, the positioning device mainly consists of a threaded positioning sleeve 5, a tapered rubber plug 7 and a screw 6. The threaded positioning sleeve 5 is welded to the steel column 1 when the steel column 1 is processed in the steel structure factory; the tapered rubber plug 7 and the screw 6 are installed after the reinforcement of the rigid column is tied. During installation, the rubber plug 7 is first screwed onto the screw 6 so that the screw 6 is exposed from the small end of the tapered rubber plug 7 by 45 to 48 mm, and then the exposed screw 6 is screwed into the threaded positioning sleeve 5 to ensure that the small end of the tapered rubber plug 7 is tight with the end of the threaded positioning sleeve 5.

[0041] S4. Rigid column mold closing: After the positioning device is installed, the rigid column formwork 2 is hoisted in pieces; the formwork 2 positioning device is fixed by a combination of φ48×3 steel pipe 8, mountain-shaped clamp 8 and double nuts 9, and then the column is reinforced by using square and round buckles.

[0042] Among them, after the positioning device is reinforced, square and round buckles are used to reinforce the column. The square and round buckles are installed every 500mm starting from 200mm above the bottom of the column. The last square and round buckle at the top is no more than 200mm away from the top of the column.

[0043] S5. Casting of rigid column concrete: When casting rigid column concrete, layered casting should be adopted, and the height of each layer should not exceed 3m; the beam, slab concrete and rigid column concrete should be cast separately, and the beam and slab concrete should be cast after the rigid column concrete reaches the predetermined strength. The joints between the beam, slab and column tops should be treated by construction joint treatment.

[0044] S6. Demoulding: When dismantling the mould, first remove the square and round buckles from top to bottom, then remove the positioning device from top to bottom, and finally remove the template 2; unscrew the screw rod 6 by 50mm so that its end is unscrewed from the threaded positioning sleeve 5; pull out the tapered rubber plug 7 through the thread of the hole of the tapered rubber plug 7 and the thread teeth of the screw rod 6; clean the garbage in the cup mouth hole left after removing the tapered rubber plug 7, and use micro-expansion mortar to grout the hole.

[0045] The present application vertically fixes a threaded positioning sleeve 5 on the outer side of the flange plate of the steel section 1, and connects the outer template and the reinforced steel pipe 3 through a screw rod 6. The position of the template and the reinforced steel pipe 3 is adjusted by adjusting the extension length of the screw rod 6. The conical rubber plug 7 in the middle of the screw rod can be used to easily determine the distance between the template 2 and the threaded positioning sleeve 5, thereby ensuring the accurate installation of the template and the reinforced steel pipe 3. At the same time, when the pouring is completed, the conical rubber plug 7 can be pulled out of the concrete column through the screw rod 6 for easy recycling, which reduces the loss of workpieces and reduces production costs.

[0046] The above description is only an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A steel-concrete column formwork positioning structure, characterized in that: It includes multiple templates that surround the steel section, and a reinforcing steel pipe is provided on the outside of the template. Multiple pairs of bolts and threaded positioning sleeves are vertically welded on the outside of the flange plate of the steel section column. A screw rod that passes through the template is connected in the threaded positioning sleeve. A conical rubber plug is sleeved in the screw rod. The conical rubber plug is located between the template and the threaded positioning sleeve. The screw rod is fixed to the reinforcing steel pipe by the reinforcing steel pipe, a mountain clamp and a double nut.

2. The structure according to claim 1, characterized in that: The steel section is formed by cutting and welding four I-shaped steel sections, wherein the cross section of the steel section is in a field shape.

3. The structure according to claim 1, characterized in that: In the vertical direction, the threaded positioning sleeves are located between the bolts, and adjacent threaded positioning sleeves are spaced 2 meters apart.

4. The structure according to claim 2, characterized in that: In the horizontal direction, the threaded positioning sleeve is located outside the bolt.

5. The structure according to claim 3, characterized in that: The threaded positioning sleeve is made of round steel, wherein one end of the threaded positioning sleeve is provided with an internal thread hole with a depth of 50 mm.

6. The structure according to claim 1, characterized in that The template includes a thick wooden board and secondary keels, and a plurality of groups of the secondary keels are vertically fixed to the outer side of the thick wooden board.

7. A steel-concrete column formwork positioning construction method, characterized in that: The following steps are involved: Steel section hoisting: hoist the steel section by a crane and place the steel section vertically into the steel section socket; Rigid column reinforcement binding: When tying the reinforcement on the outside of the steel section, first install the vertical reinforcement, the vertical reinforcement joints are connected by straight threads, and then the stirrups are tied from bottom to top; Installation of the customized device: first screw the conical rubber plug onto the screw rod, so that the screw rod is exposed 45-48 mm from the small end of the conical rubber plug, and then screw the exposed screw rod into the threaded positioning sleeve, ensuring that the small end of the conical rubber plug abuts against the end of the threaded positioning sleeve; Rigid column mold closing: After the positioning device is installed, the rigid column formwork is hoisted in pieces; the formwork positioning device is fixed by a combination of φ48×3 steel pipe, mountain-shaped clamp and double nuts, and then the column is reinforced by using square and round buckles; Concrete pouring of rigid columns: When pouring concrete of rigid columns, it should be poured in layers, and the height of each layer should not exceed 3m; The concrete of beams and slabs and the concrete of rigid columns are poured separately. The concrete of beams and slabs is poured after the rigid column concrete reaches the predetermined strength. The joints between beams and slabs and column tops should be treated by construction joint treatment. Demoulding: When dismantling the mould, first remove the square and round buckles from top to bottom, then remove the positioning device from top to bottom, and finally remove the template; unscrew the screw rod 50mm so that its end is unscrewed from the threaded positioning sleeve; pull out the conical rubber plug through the thread of the conical rubber plug hole and the screw thread teeth; clean the garbage in the cup mouth hole left after removing the conical rubber plug, and use micro-expansion mortar to grout the hole.

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