Cast-in-place concrete batter post insertion core type self-bearing formwork and reinforcing method

Abstract

According to the cast-in-place concrete batter post inserting core type self-bearing formwork and the reinforcing method, a concrete batter post is a circular concrete batter post, and the reinforcing method is characterized by comprising the following steps of a, I-shaped steel and opposite-pull screws are embedded, b, surveying and setting out are conducted, c, middle opposite-pull screws are welded, d, a concrete batter post reinforcement cage is installed, e, a formwork is installed and reinforced, and f, concrete construction is conducted. The cast-in-place concrete inclined column core-inserting type self-bearing formwork and the reinforcing method have the advantages that the problem that an inclined support cannot be arranged at the high-altitude position and the belly of the inclined column is solved, the stability of the formwork after installation and reinforcement is guaranteed, the potential problems of formwork expansion and formwork explosion during formwork installation and reinforcement are solved, the inclined column is good in straightness, and the formwork is not prone to deformation. The axis deviation is effectively controlled; and the appearance quality and the structure safety of the inclined column are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of building engineering, and in particular, relates to a cast-in-place concrete inclined column core-insertion type self-supporting formwork and a reinforcement method. Background Art

[0002] In large exhibition halls and other large-space structures, in order to form a certain facade effect, the structural design forms are diverse. There are large-diameter inclined column support structures, and the inclined column formwork support adopts the steel pipe scaffolding to add inclined support on the column belly, or the pull rod is used on the back of the inclined column to support the horizontal thrust generated by the inclined column during the concrete pouring process. However, because some inclined columns are relatively high, it is not possible to set up a support frame at the bottom.

[0003] Therefore, the known circular concrete inclined column arrangement method has the above-mentioned inconveniences and problems. Summary of the invention

[0004] The purpose of the present invention is to provide a safe and reliable cast-in-place concrete inclined column core-insertion type self-supporting formwork and reinforcement method.

[0005] To achieve the above purpose, the technical solution of the present invention is: A cast-in-place concrete inclined column core-insertion self-supporting formwork and reinforcement method, wherein the concrete inclined column is a circular concrete inclined column, and the method is characterized by comprising the following steps: a. Pre-buried I-beam and tension screws Before pouring the lower concrete, insert the lower part of a section of I-beam into the center of the circular upper concrete inclined column to be poured after positioning, leaving the upper part of the I-beam exposed, and bury the lower tension screw near the lower end of the I-beam; b. Measurement and laying out According to the cross-sectional dimensions and positions of the concrete inclined columns in the design drawings, professional surveyors shall locate and lay out the template installation edges, and take measures to control the template installation edge positioning; the template is a customized circular plywood, and a number of annular reinforcement steel belts are provided on the outside of the template, and the spacing between the steel belts is not greater than 350mm; c. Welding the middle tension screw Before tying the concrete inclined column reinforcement cage, radially weld the middle tension screw of the concrete inclined column, so that one end of the middle tension screw is welded to the I-beam; d. Install concrete inclined column reinforcement cage Complete the binding of concrete inclined column reinforcement cage according to the design drawings and complete the concealed acceptance; e. Formwork installation and reinforcement The glued cylindrical formwork deepened according to the size of the circular concrete inclined column is deepened and assembled according to the template positioning and laying-out position. The vertical steel pipe is installed on the belly of the concrete inclined column. The vertical steel pipe is arranged on the outside of the formwork, so that the lower part of the vertical steel pipe and the lower tension screw are tied with a mountain-shaped clamp, and the middle part of the vertical steel pipe is tied with a mountain-shaped clamp using the middle tension screw welded on the I-beam, and the top of the vertical steel pipe is tied with the upper tie steel pipe to reinforce the upper part of the I-beam; f. Concrete construction After the installation and reinforcement of the concrete inclined column formwork is completed, concrete construction is carried out. During the concrete construction process, the inspection of the formwork and support frame should be strengthened.

[0006] The cast-in-place concrete inclined column core-insertion type self-supporting formwork and reinforcement method of the present invention can also be further implemented by adopting the following technical measures.

[0007] In the aforementioned method, the specification of the I-beam is ≥10# I-beam.

[0008] In the aforementioned method, the specification of the lower tension screw is ≥Φ14mm screw.

[0009] The aforementioned method, wherein the template specification is ≥18mm thick template.

[0010] In the aforementioned method, the middle tension screws are arranged with a vertical spacing of no more than 1m, and the lateral spacing is such that the ends of the belly of the inclined columns extend beyond the template by 200mm.

[0011] In the aforementioned method, the lower tension screw is no more than 200 mm away from the bottom of the concrete inclined column.

[0012] In the aforementioned method, the vertical steel pipe is a Φ48*3.6mm standard galvanized steel pipe.

[0013] In the aforementioned method, the upper tie steel pipe is a Φ48*3.6mm standard galvanized steel pipe.

[0014] After adopting the above technical scheme, the cast-in-place concrete inclined column plug-in self-supporting formwork and reinforcement method of the present invention has the following advantages: 1. Solve the problem that it is impossible to set diagonal support on the belly of the diagonal column in high altitude areas; 2. Ensure the stability of the formwork after installation and reinforcement, and solve the potential problems of formwork expansion and explosion during formwork installation and reinforcement; 3. The inclined column has good straightness and the axis deviation is effectively controlled to ensure the visual quality and structural safety of the inclined column. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the installation position of the concrete inclined column according to an embodiment of the present invention; Figure 2 This is a schematic diagram of reinforcement of a concrete inclined column formwork according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the concrete inclined column steel cage reinforcement structure according to an embodiment of the present invention.

[0016] In the figure: 1 I-beam, 2 formwork, 3 steel belt, 4 lower tension screw, 5 middle tension screw, 6 belly reinforcement steel pipe, 7 upper tie steel pipe, 8 steel cage, 9 concrete inclined column. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with embodiments and accompanying drawings.

[0018] Example 1 The process flow of the cast-in-place concrete inclined column core-inserted self-supporting formwork and reinforcement method of the present invention is as follows: inserting I-beams (pre-embedded bottom tension screws) before pouring the lower layer of concrete → measuring and laying out → installing inclined column steel bars (welding middle tension screws) → formwork installation and reinforcement → concrete construction → formwork removal and maintenance → lower column construction.

[0019] Please refer to Figure 1-3 The cast-in-place concrete inclined column core-insertion self-supporting formwork and reinforcement method of the present invention comprises the following steps: 1. Prepare construction materials a): 10# I-beam; b): Formwork: 18mm thick custom round wood plywood; c): The template ring reinforcement steel belt has a spacing of no more than 350mm; d): Lower tension screw 4: (embedded during concrete pouring); e): Middle tie screw 5: M14 thread tie rod (welded on I-beam); f): Abdominal reinforcement steel pipe 6: Φ48*3.6mm standard galvanized steel pipe; g): Upper tie steel pipe 7: Φ48*3.6mm standard galvanized steel pipe; 2. Size arrangement of tension screw: a) The tension screws should be arranged with a vertical spacing of no more than 1m, and the horizontal spacing should be such that the ends of the inclined column belly part extend beyond the formwork by 200mm.

[0020] b) The distance between the first tension screw at the bottom and the bottom should not exceed 200mm.

[0021] 3. Specific operation steps for reinforcement of concrete inclined columns: 1. Pre-buried I-beam and tension screws During the lower concrete pouring stage, after positioning, insert the 10# I-beam 1, and bury the lower tension screw 4 during the lower concrete pouring; 2. Measurement and layout According to the column section size and position in the design drawings, professional surveying personnel locate and lay out the installation edge of the template 2. The template is provided with a ring-shaped reinforcing steel belt 3, and control measures are taken to locate the installation edge of the template.

[0022] 3. Welding the middle tension screw Before tying the column reinforcement cage 8, weld the tension screw 5 in the middle of the column to avoid the inability to weld and fix the tension screw after the reinforcement is tied; 4. Install the steel cage Complete the binding of column reinforcement cage 8 according to the design drawings and complete the hidden acceptance.

[0023] 5. Template installation and reinforcement The glued cylindrical formwork deepened according to the size of the cylinder is deepened and assembled according to the positioning and layout position of the formwork. Vertical steel pipes are installed on the belly of the inclined column. Pre-buried tension screws are used at the bottom and mountain-shaped clips are used for tensioning. The middle part uses tension screws welded on the I-beam and mountain-shaped clips for tensioning. The upper tension steel pipe 7 uses steel pipes to reinforce the I-beam.

[0024] 6.Concrete construction After the installation and reinforcement of the concrete inclined column 9 formwork is completed, concrete construction is carried out. During the concrete construction process, the inspection of the formwork and support frame should be strengthened.

[0025] The structural principle of the cast-in-place concrete inclined column core-insertion type self-supporting formwork and reinforcement method of the present invention is as follows: A 10# I-beam is fixed in the middle part of the inclined column by welding the middle tension screw to the I-beam. A steel pipe is set in the belly of the inclined column and fixed with a mountain-shaped card template. The I-beam has high bending strength to resist the horizontal component of force generated during concrete pouring. The I-beam can pull the horizontal component of the template and the concrete's own weight, forming a "self-supporting system".

[0026] The present invention has substantial characteristics and significant technical progress. The cast-in-place concrete inclined column core-inserted self-load-bearing formwork and reinforcement method of the present invention are suitable for the installation and reinforcement construction of cast-in-place concrete column formwork that is too high to be set up for the inclined column belly oblique support. Compared with traditional practices, the construction of cast-in-place concrete inclined columns requires the construction of oblique supports on the ground, or the use of tie rods to tie the formwork to ensure the horizontal thrust generated by the inclined column during the concrete pouring process. When the inclined column is at a high distance from the ground, it is impossible to set up oblique supports. The present invention inserts an I-beam core column into the first section of the cast-in-place structure during the concrete pouring process (similar to the role of the "0" block in the cantilever casting of a bridge), reinforces and fixes the formwork on the core column inserted into the cast-in-place structure, forms a horizontal support, and resists the horizontal thrust generated during the pouring process of the bending support column through the core column.

[0027] The cast-in-place concrete inclined column plug-in self-supporting formwork and reinforcement method of the present invention has been put into practical use in the inclined columns of the roof of Hall 7# of the Guangzhou Convention and Exhibition Center project. It is simple in construction, easy to operate, and firmly installed. It has sufficient strength, rigidity and stability, good visual quality, a wide range of applications, and is easy to master and popularize. It has been unanimously recognized by the supervision unit and the construction unit, welcomed by the operators, and has achieved good economic benefits and social impact.

[0028] The above embodiments are only for the purpose of illustrating the present invention, but not for limiting the present invention. A person skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A cast-in-place concrete inclined column core-insertion self-supporting formwork and reinforcement method, wherein the concrete inclined column is a circular concrete inclined column, characterized in that The following steps are involved: a. Pre-buried I-beam and tension screws Before pouring the lower concrete, insert the lower part of a section of I-beam into the center of the circular upper concrete inclined column to be poured after positioning, leaving the upper part of the I-beam exposed, and bury the lower tension screw near the lower end of the I-beam; b. Measurement and laying out According to the cross-sectional dimensions and positions of the concrete inclined columns in the design drawings, professional surveyors shall locate and lay out the template installation edges, and take measures to control the template installation edge positioning; the template is a customized circular plywood, and a number of annular reinforcement steel belts are provided on the outside of the template, and the spacing between the steel belts is not greater than 350mm; c. Welding the middle tension screw Before tying the concrete inclined column reinforcement cage, radially weld the middle tension screw of the concrete inclined column, so that one end of the middle tension screw is welded to the I-beam; d. Install concrete inclined column reinforcement cage Complete the binding of concrete inclined column reinforcement cage according to the design drawings and complete the concealed acceptance; e. Formwork installation and reinforcement The glued cylindrical formwork deepened according to the size of the circular concrete inclined column is deepened and assembled according to the template positioning and laying-out position. The vertical steel pipe is installed on the belly of the concrete inclined column. The vertical steel pipe is arranged on the outside of the formwork, so that the lower part of the vertical steel pipe and the lower tension screw are tied with a mountain-shaped clamp, and the middle part of the vertical steel pipe is tied with a mountain-shaped clamp using the middle tension screw welded on the I-beam, and the top of the vertical steel pipe is tied with the upper tie steel pipe to reinforce the upper part of the I-beam; f. Concrete construction After the installation and reinforcement of the concrete inclined column formwork is completed, concrete construction is carried out. During the concrete construction process, the inspection of the formwork and support frame should be strengthened.

2. The cast-in-place concrete inclined column core-insertion self-supporting formwork and reinforcement method according to claim 1, characterized in that: The specification of the I-beam is ≥10# I-beam.

3. The cast-in-place concrete inclined column core-insertion self-supporting formwork and reinforcement method according to claim 1, characterized in that: The specification of the lower tension screw is ≥Φ14mm screw.

4. The cast-in-place concrete inclined column core-insertion self-supporting formwork and reinforcement method according to claim 1, characterized in that: The template specification is ≥18mm thick template.

5. The cast-in-place concrete inclined column core-insertion self-supporting formwork and reinforcement method according to claim 1, characterized in that: The middle tension screws are arranged with a vertical spacing of no more than 1m, and a horizontal spacing of 200mm beyond the formwork at the end of the belly of the inclined column.

6. The cast-in-place concrete inclined column core-insertion self-supporting formwork and reinforcement method according to claim 1, characterized in that: The lower tension screw is no more than 200 mm away from the bottom of the concrete inclined column.

7. The cast-in-place concrete inclined column core-insertion self-supporting formwork and reinforcement method as claimed in claim 1, characterized in that: The vertical steel pipe is a Φ48*3.6mm standard galvanized steel pipe.

8. The cast-in-place concrete inclined column core-insertion self-supporting formwork and reinforcement method according to claim 1, characterized in that: The upper tie steel pipe is a Φ48*3.6mm standard galvanized steel pipe.

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