Cast-in-situ concrete inclined column plug-in core type self-bearing formwork and reinforcing method

Abstract

The application discloses a cast-in-situ concrete inclined column plug core type self-bearing formwork and reinforcing method, and the concrete inclined column is a round concrete inclined column, and the method comprises the following steps: a, embedding I-shaped steel and tensioning screw rods, b, measuring and setting out, c, welding middle tensioning screw rods, d, installing a concrete inclined column reinforcement cage, e, installing and reinforcing a formwork, and f, concrete construction. The cast-in-situ concrete inclined column plug core type self-bearing formwork and reinforcing method has the advantages that the problem that an inclined support cannot be arranged at the abdominal part of the inclined column at a high position is solved, the stability of the formwork after installation and reinforcement is ensured, the potential problems of formwork expansion and formwork explosion are solved, the straightness of the inclined column is good, the axial deviation is effectively controlled, and the appearance quality and structural safety of the inclined column are ensured.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of building engineering, in particular to a cast-in-place concrete inclined column plug core type self-bearing formwork and reinforcing method. BACKGROUND

[0002] In large exhibition halls and other large space structures, various structural design forms are needed to form certain facade effects. Large-diameter inclined column support structures are used, and inclined column formwork support is achieved by erecting steel pipe scaffolding on the column web to increase inclined support or by using a pull rod form to support the horizontal thrust of the inclined column during concrete pouring. However, because some inclined columns are high, it is not possible to erect support frames at the lower part.

[0003] Therefore, the known round concrete inclined column setting method has the above-mentioned inconveniences and problems. SUMMARY

[0004] The purpose of the present application is to provide a safe and reliable cast-in-place concrete inclined column plug core type self-bearing formwork and reinforcing method.

[0005] To achieve the above-mentioned purpose, the technical solution of the present application is as follows:

[0006] A cast-in-place concrete inclined column plug core type self-bearing formwork and reinforcing method, the concrete inclined column is a round concrete inclined column, characterized by comprising the following steps:

[0007] a. Pre-burying I-beam and tensioning screw rod

[0008] Before pouring the lower layer of concrete, a section of I-beam is inserted into the center position of the round upper section of the concrete inclined column to be poured after positioning, the upper part of the I-beam is exposed, and a lower tensioning screw rod is embedded near the lower end of the I-beam;

[0009] b. Measuring and laying out

[0010] According to the size and position of the concrete inclined column section in the design drawing, a professional measuring personnel positions and lays out the formwork installation boundary line, and takes good control measures for the formwork installation boundary line positioning; the formwork is a custom-made round wood-plywood, and a plurality of annular reinforcing steel belts are arranged on the outer side of the formwork, with a spacing of no more than 350 mm;

[0011] c. Welding the middle tensioning screw rod

[0012] Before binding the concrete inclined column reinforcement cage, a middle tensioning screw rod is radially welded to the I-beam, with one end of the middle tensioning screw rod welded to the I-beam;

[0013] d. Installing the concrete inclined column reinforcement cage

[0014] According to the design drawing, the concrete inclined column steel cage is bound, and the hidden acceptance is completed.

[0015] e, template installation and reinforcement

[0016] The glued cylindrical template deepened according to the size of the circular concrete inclined column is deepened, and is assembled according to the template positioning and line positioning position. A vertical steel pipe is installed in the abdomen of the concrete inclined column. The vertical steel pipe is arranged outside the template, so that the lower part of the vertical steel pipe is connected by a mountain-shaped clamp with the lower part of the tensioning screw, the middle part of the vertical steel pipe is connected by a mountain-shaped clamp with the middle part of the tensioning screw welded on the I-beam, and the top of the vertical steel pipe is connected with the upper part of the I-beam by the upper connecting steel pipe.

[0017] f, concrete construction

[0018] After the concrete inclined column template installation and reinforcement construction is completed, the concrete construction is carried out. During the concrete construction process, the template and the support frame should be strengthened.

[0019] The cast-in-place concrete inclined column plug-in core type self-bearing formwork and reinforcement method of the present application can also be further realized by using the following technical measures.

[0020] The aforementioned method, wherein the I-beam specification is ≥10# I-beam.

[0021] The aforementioned method, wherein the lower tensioning screw specification is ≥Φ14mm screw.

[0022] The aforementioned method, wherein the template specification is ≥18mm thick template.

[0023] The aforementioned method, wherein the middle tensioning screw is arranged with a vertical spacing of not more than 1m, and a horizontal spacing of 200mm beyond the template at the end of the inclined column abdomen.

[0024] The aforementioned method, wherein the lower tensioning screw is not more than 200mm from the bottom of the concrete inclined column.

[0025] The aforementioned method, wherein the vertical steel pipe is a Φ48*3.6mm standard galvanized steel pipe.

[0026] The aforementioned method, wherein the upper connecting steel pipe is a Φ48*3.6mm standard galvanized steel pipe.

[0027] After using the above technical scheme, the cast-in-place concrete inclined column plug-in core type self-bearing formwork and reinforcement method of the present application has the following advantages:

[0028] 1. Solving the problem of setting up inclined support in high-altitude position and inclined column abdomen;

[0029] 2. Ensure the stability of the template installation and reinforcement, solve the potential expansion of the template installation and reinforcement, and solve the problem of the template installation and reinforcement;

[0030] 3. Good straightness of the inclined column, effective control of the axis offset, and guarantee of the visual quality and structural safety of the inclined column. BRIEF DESCRIPTION OF DRAWINGS

[0031] Fig. 1 The figure is a schematic diagram of the installation position of the concrete inclined column of the embodiment of the present application;

[0032] Fig. 2 The figure is a schematic diagram of the template reinforcement of the concrete inclined column of the embodiment of the present application;

[0033] Fig. 3 The figure is a schematic diagram of the reinforcement structure of the concrete inclined column of the embodiment of the present application.

[0034] In the figure: 1 I-beam, 2 template, 3 steel belt, 4 lower tensioning screw, 5 middle tensioning screw, 6 abdominal reinforcement steel pipe, 7 upper tie-in steel pipe, 8 reinforcement cage, 9 concrete inclined column. DETAILED DESCRIPTION

[0035] The present application will be further described below in conjunction with the embodiments and their accompanying drawings.

[0036] Embodiment 1

[0037] The process flow of the cast-in-place concrete inclined column plug-in core type self-bearing formwork and reinforcement method of the present application: inserting I-beam (pre-burying lower tensioning screw) before pouring lower concrete → measuring and laying wire → installing inclined column reinforcement (welding middle tensioning screw) → template installation and reinforcement → concrete construction → formwork removal and curing → lower column construction.

[0038] Please refer to Figs. 1-3 The cast-in-place concrete inclined column plug-in core type self-bearing formwork and reinforcement method of the present application comprises the following steps:

[0039] I. Preparing construction materials

[0040] a): 10# I-beam;

[0041] b): Template: 18mm thick customized round wood plywood;

[0042] c): Template ring-shaped reinforcement steel belt, spacing not greater than 350mm;

[0043] d): Lower tensioning screw 4: (pre-buried during concrete pouring stage);

[0044] e): Middle tensioning screw 5: M14 threaded tensioning rod (welded on the I-beam);

[0045] f) Abdominal reinforced steel pipe 6: Φ48*3.6mm standard galvanized steel pipe;

[0046] g) Upper tie-in steel pipe 7: Φ48*3.6mm standard galvanized steel pipe;

[0047] II. Size arrangement of the tie rod screw:

[0048] a) The tie rod screw should be arranged with a vertical spacing of not more than 1m, and a horizontal spacing of not more than 200mm beyond the formwork at the end of the abdominal part of the inclined column.

[0049] b) The first row of the lower tie rod screw is not more than 200mm from the bottom.

[0050] III. Specific operation steps for reinforcing the concrete inclined column:

[0051] 1. Embedded I-beam and tie rod

[0052] During the lower concrete pouring stage, insert the 10# I-beam 1 after positioning, and embed the lower tie rod 4 in the lower concrete pouring;

[0053] 2. Measurement and line laying

[0054] According to the column section size and position in the design drawing, the professional measurement personnel position and lay the line of the formwork 2 installation edge, the formwork is provided with a ring-shaped reinforcing steel belt 3, and the formwork installation edge positioning control measures are well done.

[0055] 3. Welding of middle tie rod

[0056] Before binding the column steel reinforcement cage 8, weld the middle tie rod 5 of the column to avoid the difficulty of welding and fixing the tie rod after the steel bar is bound;

[0057] 4. Installation of steel reinforcement cage

[0058] According to the design drawing, complete the binding of the column steel reinforcement cage 8, and complete the concealed acceptance.

[0059] 5. Formwork installation and reinforcement

[0060] According to the deepening of the glued cylindrical formwork according to the cylindrical size, the glued cylindrical formwork is deepened and processed, assembled according to the formwork positioning and laying position, vertical steel pipes are installed at the abdominal part of the inclined column, the pre-embedded tie rod is used at the lower part, and the tie-in is performed by using the chevron-shaped card, the middle part uses the tie rod welded on the I-beam to tie in by using the chevron-shaped card, and the upper tie-in steel pipe 7 uses the steel pipe to tie in the I-beam for reinforcement.

[0061] 6. Concrete construction

[0062] After the formwork installation and reinforcement construction of the concrete inclined column 9 is completed, the concrete construction is carried out, and during the concrete construction process, the formwork and support frame should be strengthened.

[0063] The construction principle of the cast-in-place concrete inclined column plug core type self-bearing formwork and reinforcing method of the application is as follows:

[0064] The 10# I-shaped steel is fixed in the middle part of the inclined column, the middle part is fixed by welding the tensioning screw rod on the I-shaped steel, the steel pipe is arranged in the inclined column web and is fixed by using the mountain-shaped clamping template, the I-shaped steel can resist the horizontal component force generated in the concrete pouring process by the high bending strength of the I-shaped steel, the I-shaped steel can pull the horizontal component force of the formwork and the concrete dead weight, and a "self-bearing system" is formed.

[0065] The cast-in-place concrete inclined column plug core type self-bearing formwork and reinforcing method of the application has substantial features and significant technical progress, is suitable for the installation and reinforcement construction of the cast-in-place concrete column formwork which cannot be arranged with the inclined support in the inclined column web at a high distance from the ground, compared with the traditional method, the cast-in-place concrete inclined column construction needs to arrange the inclined support on the ground or pull the formwork by the pull rod to ensure that the horizontal thrust generated in the concrete pouring process of the inclined column, when the distance between the inclined column and the ground is high, the inclined support cannot be arranged, and the first section of the cast-in-place structure is inserted with the I-shaped steel core column (similar to the "0" block in the bridge cantilever pouring) in the concrete pouring process, the formwork is reinforced and fixed on the core column inserted in the cast-in-place structure to form the horizontal support and resist the horizontal thrust generated in the pouring process of the core column.

[0066] The cast-in-place concrete inclined column plug core type self-bearing formwork and reinforcing method of the application is actually used in the roof inclined column of the 7# hall of the Guangzhou Exhibition Center project, has the advantages of simple construction, easy operation, firm installation, sufficient strength, rigidity and stability, good visual quality, wide application range, easy to use, easy to popularize, is unanimously recognized by the supervision unit and the construction unit, is welcomed by the operating personnel, and good economic benefits and social influence are obtained.

[0067] The above examples are only used to illustrate the application, and are not limited to the application, and those skilled in the art can make various transformations or changes without departing from the spirit and scope of the application. Therefore, all equivalent technical solutions should belong to the scope of the application, and should be limited by the claims.

Claims

1. A cast-in-place concrete inclined column plug-in core self-bearing formwork and reinforcing method, the concrete inclined column is a circular concrete inclined column, characterized in that It comprises the following steps: a. Pre-buried I-beam and tensioning screw rod Before pouring the lower concrete, a section of I-beam is inserted into the center of the upper circular concrete inclined column to be poured after positioning, the lower part of the I-beam is exposed, and a lower tensioning screw rod is buried near the lower end of the I-beam; b. Measurement and line laying According to the size and position of the concrete inclined column section in the design drawing, the template installation edge line is positioned and laid by professional measurement personnel, and the template installation edge line positioning control measures are well done; the template is a customized circular wood plywood, and a plurality of annular reinforcing steel belts are arranged on the outer side of the template, with a spacing of not more than 350mm; c. Welding of middle tensioning screw rod Before binding the concrete inclined column reinforcement cage, the middle tensioning screw rod is radially welded to the I-beam, with one end of the middle tensioning screw rod welded to the I-beam; d. Installation of concrete inclined column reinforcement cage According to the design drawing, the concrete inclined column reinforcement cage is bound and completed, and the concealed acceptance is completed; e. Template installation and reinforcement The plywood column template deepened according to the size of the circular concrete inclined column is deepened and processed, and is assembled according to the template positioning and laying position, vertical steel pipes are installed in the web of the concrete inclined column, the vertical steel pipes are arranged on the outer side of the template, the lower part of the vertical steel pipes is connected to the lower tensioning screw rod by using a mountain-shaped clamp, the middle part of the vertical steel pipes is connected to the middle tensioning screw rod welded to the I-beam by using a mountain-shaped clamp, and the top of the vertical steel pipes is connected to the upper tensioning steel pipe to reinforce the upper part of the I-beam; f. Concrete construction After the concrete inclined column template installation and reinforcement construction is completed, the concrete construction is carried out, and during the concrete construction process, the template and support frame should be strengthened.

2. The cast-in-place concrete inclined column plug-in core type self-bearing formwork and reinforcement method according to claim 1, characterized in that, The I-beam specification is ≥10# I-beam.

3. The cast-in-place concrete inclined column plug-in core type self-bearing formwork and reinforcement method according to claim 1, characterized in that, The lower tensioning screw rod specification is ≥Φ14mm screw rod.

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

5. The cast-in-place concrete batter column plug-in core self-bearing formwork and reinforcement method according to claim 1, characterized in that, The middle tensioning screw rod is arranged with a vertical spacing of not more than 1m, and a horizontal spacing of 200mm beyond the template at the end of the web.

6. The cast-in-place concrete batter insert core self-bearing formwork and reinforcement method according to claim 1, characterized in that, The lower tensioning screw rod is not more than 200mm away from the bottom of the concrete inclined column.

7. The cast-in-place concrete batter pole insert core type self-bearing formwork and reinforcement method according to claim 1, characterized by, The vertical steel pipe is a Φ48*3.6mm standard galvanized steel pipe.

8. The cast-in-place concrete batter pole insert core type self-bearing formwork and reinforcement method according to claim 1, characterized by, The upper tensioning steel pipe is a Φ48*3.6mm standard galvanized steel pipe.

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