A large-section column first stirrup and then vertical bar reverse construction process

Abstract

The application discloses a large-section column reverse construction technology of hoop before vertical reinforcement, and belongs to the field of building construction technology.The technology comprises the following steps: step (1), column reinforcement manufacturing;step (2), outer hoop marking and column corner vertical reinforcement marking;step (3), operation frame erection;step (4), column corner vertical reinforcement installation;step (5), hoop installation;step (6), four-side correction and temporary fixing;step (7), column inner vertical reinforcement installation;step (8), binding and forming;and step (9), temporary fixing and operation frame removal.The application adopts the reverse construction method of hoop before vertical reinforcement, can greatly improve work efficiency, reduce labor intensity, has beautiful column reinforcement forming effect, excellent quality effect, can achieve remarkable social and economic benefits, and has universal popularization and application value.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, specifically relating to a reverse construction process for large-section columns, where stirrups are installed first and then vertical reinforcement is added later. Background Technology

[0002] With the development of technology, the vertical height of modern buildings is constantly breaking new records. In order to ensure the vertical rigidity of buildings, the cross-sectional dimensions of columns are becoming larger and larger, and the specifications of the vertical reinforcement and stirrups of the columns are also becoming larger and larger. The large diameter vertical reinforcement and stirrups of large cross-section columns bring huge challenges to construction.

[0003] The traditional method of installing column reinforcement involves first inserting the stirrups into the bottom of the column, then extending the vertical bars, and finally sliding the stirrups one by one upwards into place. This process has the following drawbacks:

[0004] Disadvantage (1): Due to the resistance of the threaded steel bar, the resistance is very large during the process of the stirrup sliding up, and the labor intensity of the workers is very high.

[0005] Disadvantage (2): Each stirrup needs to be slid upwards from the bottom of the column to the installation position, which involves a lot of unnecessary work and the installation efficiency is very low;

[0006] Disadvantage (3): During the process of the stirrup sliding up from the bottom, it will inevitably collide with the straight threaded sleeve of the vertical bar. In particular, the outer diameter of the large-diameter straight threaded sleeve is much larger than the diameter of the bar, which increases the difficulty of the stirrup sliding up.

[0007] To solve the aforementioned problems in the traditional installation of steel reinforcement in large-section columns, there is an urgent need to develop a construction process that is labor-intensive, efficient, convenient, and of guaranteed quality. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a reverse construction process for large cross-section columns, which is characterized by low labor intensity, high installation efficiency, convenient installation, and guaranteed quality, with stirrups installed first and then vertical reinforcement.

[0009] The technical solution adopted by this invention to solve its technical problem is: a reverse construction process for large-section columns, which involves first installing stirrups and then erecting vertical reinforcement, comprising the following steps:

[0010] Step (1): Fabrication of column reinforcement bars;

[0011] Step (2): Marking the outer hoop and the column corner reinforcement;

[0012] Step (3): Erecting the operating scaffold;

[0013] Step (4): Install column corner reinforcement bars;

[0014] Step (5): Install stirrups;

[0015] Step (6): Four-sided correction and temporary fixation;

[0016] Step (7): Installation of internal column reinforcement bars;

[0017] Step (8): Binding and shaping;

[0018] Step (9): Remove the temporary fixing and operating frame.

[0019] Further, in step (1), the column reinforcement fabrication includes the fabrication of outer hoop, inner hoop, column corner reinforcement, column inner reinforcement and hook. The hook length and angle of the outer hoop, inner hoop and hook meet the specifications. The thread ends of the column corner reinforcement and column inner reinforcement are protected with plastic caps.

[0020] Further, in step (2), the outer hoop marking involves selecting an outer hoop and marking the corner position of the inner hoop on it with a marker. Then, using this hoop as a standard, all the outer hoops of this column are stacked vertically, and the corner positions of the inner hoop and hook are marked on all the outer hoops using a vertical ruler. The column corner reinforcement marking involves marking the vertical position of each outer hoop with a marker according to the vertical design spacing of the outer hoops.

[0021] Furthermore, in step (3), the operating frame is erected using a disc buckle frame with a width of 900mm, a span determined by the column cross-section, a step distance of 1.2m-1.8m, and an outer upright height 1.5m higher than the operating layer. The operating frame is erected as a four-sided closed type, with steel pipe diagonal bracing on all four sides and the support points supported on the floor slab to ensure the stability and safety of the operating frame.

[0022] Furthermore, in step (4), the column corner reinforcement is installed using a straight threaded sleeve connection and a torque wrench is used to install it in place according to the specified torque requirements.

[0023] Further, in step (5), the stirrups are installed by installing the outer stirrups from bottom to top according to the markings on the column corner reinforcement bars, with the opening directions staggered and tied securely; the inner stirrups and hooks are placed on the outer stirrups according to the markings, with the opening directions staggered and not tied.

[0024] Furthermore, in step (6), the four-sided correction and temporary fixing involves selecting two adjacent surfaces of the column as correction surfaces, suspending a ball from the top of the column, and correcting it with reference to the ground control line. After correction, the column is temporarily fixed to the operating frame with steel bars to ensure that the column bars are vertical.

[0025] Further, in step (7), the installation of the column internal reinforcement involves inserting the remaining four side reinforcements into the sleeve from the top down, using a torque wrench to install them in place according to the specified torque requirements, and the operator wearing a safety belt.

[0026] Furthermore, in step (8), the binding and shaping involves securing the outer hoop and inner hoop to the vertical reinforcement bars, and the operator wears a safety belt while working.

[0027] Furthermore, in step (9), the temporary fixing and operating frame are dismantled first, and then the operating frame is dismantled. During dismantling, the frame is dismantled from top to bottom. The dismantled disc buckle frame tubes must not be thrown to ensure safety.

[0028] Compared with existing technologies, this invention solves the problem of the traditional process of first placing the stirrups at the bottom of the column, then installing the vertical bars, and finally sliding the stirrups upwards one by one into place. Furthermore, this process suffers from high labor intensity and low efficiency due to the resistance of the threaded steel bars and the large outer diameter of the straight threaded sleeve. The invention offers the following advantages: 1. Convenient installation and low labor intensity; 2. High installation efficiency and good economic benefits; 3. Guaranteed quality and safety. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the column reinforcement fabrication for the present invention;

[0030] Figure 2 This is a schematic diagram of the outer hoop marking and column corner reinforcement marking of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the operating frame of the present invention;

[0032] Figure 4 This is a schematic diagram of the installation of the column corner reinforcement bars according to the present invention;

[0033] Figure 5 This is a schematic diagram of the stirrup installation according to the present invention;

[0034] Figure 6 This is a schematic diagram of the four-sided correction and temporary fixing of the present invention;

[0035] Figure 7 This is a schematic diagram of the installation of the internal vertical reinforcement bars of the column according to the present invention;

[0036] Figure 8 This is a schematic diagram of the binding and forming structure of the present invention;

[0037] In the diagram: 1. Outer hoop; 2. Inner hoop; 3. Column corner reinforcement; 4. Column inner reinforcement; 5. Operating frame; 6. Steel pipe diagonal brace; 7. Hook; 8. Temporary fixation. Detailed Implementation

[0038] The invention will be further described below with reference to the accompanying drawings and embodiments.

[0039] Reference Figures 1 to 8A reverse construction process for large-section columns, involving first installing stirrups and then erecting vertical reinforcement, includes the following steps:

[0040] Step (1): Fabrication of column reinforcement bars;

[0041] Step (2): Mark the outer hoop 1 and the column corner reinforcement 3;

[0042] Step (3): Erect the operating frame 5;

[0043] Step (4): Install column corner reinforcement bars 3;

[0044] Step (5): Install stirrups;

[0045] Step (6): Four-sided correction and temporary fixation;

[0046] Step (7): Install the internal reinforcement bars 4 of the column;

[0047] Step (8): Binding and shaping;

[0048] Step (9): Remove the temporary fixing and operating frame.

[0049] In step (1), the column reinforcement fabrication includes the fabrication of outer hoop 1, inner hoop 2, column corner reinforcement 3, column inner reinforcement 4, and hook 7. The hook length and angle of the outer hoop 1, inner hoop 2, and hook 7 meet the specifications. The thread ends of the column corner reinforcement 3 and column inner reinforcement 4 are protected with plastic caps.

[0050] In step (2), the outer hoop 1 is marked by selecting an outer hoop 1 and marking the corner positions of the inner hoop 2 and the hook 7 on it with a marker. Then, using this hoop as a standard, all the outer hoops of this column are stacked vertically, and the corner positions of the inner hoop 2 and the hook 7 are marked on all the outer hoop 1s with a vertical ruler. The column corner reinforcement 3 is marked by marking the vertical position of each outer hoop 1 with a marker according to the vertical design spacing of the outer hoop 1.

[0051] In step (3), the operating frame 5 is erected using a disc buckle frame with an erection width of 900mm. The span is determined according to the column cross-section, and the step distance is 1.2m-1.8m. The height of the outer uprights is 1.5m higher than the operating layer, forming a four-sided closed operating frame. The four sides are supported by steel pipe diagonal bracing 6, and the support points are supported on the floor slab to ensure the stability and safety of the operating frame.

[0052] In step (4), the column corner ribs 3 are installed using a straight threaded sleeve connection and a torque wrench is used to install them in place according to the specified torque requirements.

[0053] In step (5), the stirrups are installed by installing the outer stirrups 1 from bottom to top according to the markings on the column corner reinforcement 3, with the opening directions staggered and tied securely; the inner stirrups 2 and hooks 7 are placed only on the outer stirrups 1 according to the markings, with the opening directions of the inner stirrups 2 staggered and not tied.

[0054] In step (6), the four-sided correction and temporary fixing are carried out by selecting two adjacent surfaces of the column as correction surfaces, suspending a ball from the top of the column, and correcting it with reference to the ground control line. After correction, the column is temporarily fixed to the operating frame 5 with steel bars to ensure that the column bars are vertical.

[0055] In step (7), the column internal reinforcement 4 is installed by inserting the remaining reinforcements on all four sides into the sleeve from the top down, and installing them in place according to the specified torque requirements using a torque wrench. The operator wears a safety belt during the operation.

[0056] In step (8), the binding and shaping involves securing the outer hoop 1 and the inner hoop 2 to the vertical reinforcement bars, and the operator wears a safety belt while working.

[0057] In step (9), the temporary fixing 8 and the operating frame 5 are removed. First, the temporary fixing 8 is removed, and then the operating frame 5 is removed. During the removal, the frame is removed from top to bottom. The removed disc buckle frame tubes must not be thrown to ensure safety.

[0058] This invention employs a reverse construction method, where stirrups are installed before vertical reinforcement, which can significantly improve work efficiency, reduce labor intensity, and produce aesthetically pleasing and high-quality column reinforcement. It can achieve significant social and economic benefits and has widespread application value.

[0059] The above description is merely a detailed explanation of specific embodiments of the present invention and is not intended to limit the invention. Various substitutions, modifications, and improvements made by those skilled in the art without departing from the principles and scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A large cross-section column post-tie-beam pre-stirrup construction process, characterized in that, Includes the following steps: Step (1): Fabrication of column reinforcement bars; Step (2): Marking the outer hoop and the column corner reinforcement; Step (3): Erecting the operating scaffold; Step (4): Install column corner reinforcement bars; Step (5): Install stirrups; Step (6): Four-sided alignment and temporary fixation; Step (7): Installation of internal column reinforcement bars; Step (8): Binding and shaping; Step (9): Remove the temporary fixing and operating frame; In step (1), the column reinforcement fabrication includes the fabrication of outer hoop, inner hoop, column corner reinforcement, column inner reinforcement and hook. The hook length and angle of the outer hoop, inner hoop and hook meet the specifications. The thread ends of the column corner reinforcement and column inner reinforcement are protected with plastic caps. In step (2), the outer hoop marking involves selecting an outer hoop and marking the corner positions of the inner hoop with a marker. Then, using this hoop as a standard, all the outer hoops of the column are stacked vertically, and the corner positions of the inner hoop and hook are marked on all the outer hoops using a vertical ruler. The column corner reinforcement marking involves marking the vertical position of each outer hoop with a marker according to the vertical design spacing of the outer hoops. In step (4), the column corner reinforcement is installed using a straight threaded sleeve connection and a torque wrench is used to install it in place according to the specified torque requirements; In step (5), the stirrups are installed by installing the outer stirrups from bottom to top according to the markings on the column corner stirrups, with the opening directions staggered and tied securely; the inner stirrups and hooks are placed on the outer stirrups according to the markings, with the opening directions staggered and not tied. In step (6), the four-sided correction and temporary fixing are carried out by selecting two adjacent surfaces of the column as correction surfaces, hanging a plumb bob from the top of the column, and correcting with reference to the ground control line. After correction, the column is temporarily fixed to the operating frame with steel bars to ensure that the column bars are vertical. In step (7), the column internal reinforcement is installed by inserting the remaining reinforcement on all four sides into the sleeve from the top down, and installing it in place according to the specified torque requirements using a torque wrench. The operator must wear a safety belt during the operation.

2. The construction process of large cross-section column according to claim 1, characterized in that: In step (3), the operating frame is erected using a disc buckle frame with a width of 900mm. The span is determined according to the column cross-section, and the step distance is 1.2m-1.8m. The height of the outer uprights is 1.5m higher than the operating layer. The operating frame is erected as a four-sided closed type, with steel pipe diagonal bracing on all four sides. The support points are supported on the floor slab to ensure the stability and safety of the operating frame.

3. The large cross-section column first stirrup and then vertical bar reverse construction process according to claim 1 or 2, characterized in that: In step (8), the binding and shaping involves securing the outer hoop and inner hoop to the vertical reinforcement bars, and the operator wears a safety belt while working.

4. The construction process according to claim 1 or 2, characterized in that: In step (9), the temporary fixing and operating frame are removed first, and then the operating frame is removed. During the removal, the frame is removed from top to bottom. The removed disc buckle frame tubes must not be thrown to ensure safety.

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