A construction method for super-high independent concrete columns

Abstract

The present invention provides a construction method for ultra-high independent concrete columns, including pre-embedded anchor bolts, welding straight threaded sleeves, hoisting round steel pipes, pouring the first section of the concrete column, and extending the concrete column. This method eliminates the need for full-scale scaffolding or customized formwork equipment from specialized manufacturers. Instead, a simple operating frame is erected around the independent column, and reinforcement is performed as with conventional concrete columns to ensure the out-of-plane stability of the formwork. The independent column achieves excellent forming results and improves construction quality.

Description

Technical Field

[0001] The invention relates to the technical field of concrete column construction, in particular to a construction method for an ultra-high independent concrete column. Background Art

[0002] For single-story venues, factories and other structures, the vertical load-bearing components are usually designed as independent reinforced concrete columns, while the roof is a steel structure. The height of these independent columns can reach 20 to 30 meters. It is difficult to ensure the out-of-plane stability of the formwork when pouring concrete for such high independent columns.

[0003] There are two common approaches. One involves erecting a full-height scaffolding, with column formwork reinforcements tied to the full-height scaffolding to ensure out-of-plane stability. The other involves employing a climbing formwork construction method similar to that used in municipal bridge piers. This method stabilizes the upper column formwork out-of-plane by fixing it to the already cast section at the bottom, and then continuously climbing upward after pouring. Both of these construction methods consume large amounts of recyclable materials, require a long construction period, and are costly, making them extremely uneconomical. Summary of the Invention

[0004] In view of the above-mentioned prior art, the present invention proposes a construction method for super-high independent concrete columns.

[0005] The present invention provides a construction method for an ultra-high independent concrete column, comprising the following steps:

[0006] S1. Pre-buried anchor bolts: Pre-buried several anchor bolts when pouring the column foundation;

[0007] S2. Welding straight thread sleeves: Weld straight thread sleeves along the axial direction around several sections of round steel pipes in positions corresponding to the column formwork reinforcement requirements;

[0008] S3. Hoisting the round steel pipe: hoist the first section of the round steel pipe and install it in the center of the column foundation through the anchor bolts, and strictly control the verticality of the round steel pipe;

[0009] S4. Casting the first section of concrete column: The concrete column is cast in sections. The steel bars of the first section of concrete column are installed. The first section of concrete column is cast to a certain height to ensure the stability of the first section of round steel pipe. The column formwork is connected and fixed to the first section of round steel pipe by screwing a screw into a straight threaded sleeve. The first section of concrete column is cast continuously so that the joint position of the first section of round steel pipe is higher than the casting surface of the first section of concrete column by a certain height.

[0010] S5. Extend the concrete column: According to the method in step 4, each time a section of concrete column is constructed, the round steel pipe is welded upward to add another section, and the column formwork is turned upward for rotation.

[0011] Preferably, in S1, four anchor bolts are pre-buried.

[0012] Preferably, in S4, each section of the concrete column is 4.5 m.

[0013] Preferably, in S4, the first section of concrete column is continued to be poured using a tower crane and hopper pouring method.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention provides a construction method for an ultra-high independent concrete column. A round steel pipe is pre-buried in the center of the concrete column, and straight threaded sleeves are welded on all four sides of the steel pipe. The screw and the round steel pipe are threadedly connected to the formwork through the sleeves. The strength of the round steel pipe is used to ensure the out-of-plane stability of the independent concrete column formwork. There is no need to set up a full-floor scaffolding or customize formwork equipment from a professional manufacturer. A simple operating frame is set up around the independent column, and the out-of-plane stability of the formwork can be ensured by reinforcing it in the same way as conventional concrete columns.

[0016] 2. The present invention is easy to construct, saves costs and construction time, and is suitable for the formwork reinforcement construction of independent concrete columns with a height of more than 10 meters. Based on a comparative calculation of four 30-meter-high columns in a 10.00×10.00-meter range, the use of full-floor scaffolding for reinforcement requires an additional 135,000 yuan in full-floor scaffolding erection and dismantling fees; the use of climbing formwork for reinforcement requires an additional 1,200,000 yuan in climbing formwork fees; while the use of the present invention only requires 11,660 yuan, eliminating the time required for erecting and dismantling full-floor scaffolding or the time required for designing, deepening, installing, climbing, and dismantling climbing formwork equipment. The independent column forming effect is good, and the construction quality is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 2 is a schematic diagram of the construction of the anchor bolts in the embodiment of the present invention.

[0018] Figure 2 It is a top view of the construction of the concrete column in the embodiment of the present invention.

[0019] Figure 3 It is a side view of the construction of a concrete column in an embodiment of the present invention.

[0020] Among them, 1. Column foundation; 2. Anchor bolts; 3. First section of round steel pipe; 4. Column formwork; 5. Straight threaded sleeve; 6. First section of concrete column; 7. Screw. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations. Example

[0022] A construction method for super-high independent concrete columns, such as Figure 1-3 As shown, the following steps are included:

[0023] S1. Pre-embedded anchor bolts: Pre-embed four M24 anchor bolts 2 when pouring the column foundation 1.

[0024] S2. Welding straight thread sleeves: Weld straight thread sleeves 5 along the axial direction around several sections of φ300 round steel pipes in positions corresponding to the reinforcement requirements of the column formwork 4.

[0025] S3. Hoisting the round steel pipe: Hoist the first section of the round steel pipe 3, install the first section of the round steel pipe 3 in the center of the column foundation 1 through the anchor bolts 2, and strictly control the verticality of the first section of the round steel pipe 3.

[0026] S4. Casting of the first section of concrete column: The concrete column is cast in sections, with each section being 4.5m long. The steel bars of the first section of concrete column 6 are installed, and the first section of concrete column 6 is cast to a height of 1m to ensure the stability of the first section of round steel pipe 3. The column formwork 4 is connected and fixed to the first section of round steel pipe 3 by screwing the screw 7 into the straight threaded sleeve 5. The first section of concrete column 6 is cast using the tower crane and hopper casting method. During the construction process, the column steel bars, column formwork 4 and round steel pipe 3 must not be collided. Considering the effect of high temperature of welding on concrete when the round steel pipe 3 is extended, the joint position of the first section of round steel pipe 3 is made 1.2m higher than the casting surface of the first section of concrete column 6.

[0027] S5. Extending the concrete column: According to the method in step 4, each time a section of the concrete column is constructed, the round steel pipe is welded upward to add another section, and the column formwork 4 is turned upward and used in rotation. This is repeated until the concrete column is poured to the specified height.

[0028] In this embodiment, a round steel pipe is pre-buried in the center of the concrete column, and straight threaded sleeves 5 are welded on all four sides of the steel pipe. The screw 7 is threadedly connected to the round steel pipe to fix the formwork through the sleeve. The strength of the round steel pipe is used to ensure the out-of-plane stability of the independent concrete column formwork. There is no need to set up a full-floor scaffolding or customize formwork equipment from a professional manufacturer. A simple operating frame is set up around the independent column, and the out-of-plane stability of the formwork can be ensured by reinforcing it according to conventional concrete columns. The independent column has a good molding effect and the construction quality is also improved.

[0029] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure made using the contents of the present invention's description and drawings, directly or indirectly applied to other related technical fields, is also within the patent protection scope of the present invention.

Claims

1. A construction method for an ultra-high independent concrete column, characterized in that: The steps include: S1. Pre-buried anchor bolts: Pre-buried several anchor bolts when pouring the column foundation; S2. Welding straight thread sleeves: Weld straight thread sleeves along the axial direction around several sections of round steel pipes in positions corresponding to the column formwork reinforcement requirements; S3. Hoisting the round steel pipe: hoist the first section of the round steel pipe and install it in the center of the column foundation through the anchor bolts, and strictly control the verticality of the round steel pipe; S4. Casting the first section of concrete column: The concrete column is cast in sections. The steel bars of the first section of concrete column are installed. The first section of concrete column is cast to a certain height to ensure the stability of the first section of round steel pipe. The column formwork is connected and fixed to the first section of round steel pipe by screwing a screw into a straight threaded sleeve. The first section of concrete column is cast continuously so that the joint position of the first section of round steel pipe is higher than the casting surface of the first section of concrete column by a certain height. S5. Extend the concrete column: According to the method in step 4, each time a section of concrete column is constructed, the round steel pipe is welded upward to add another section, and the column formwork is turned upward for rotation.

2. The construction method of the super-high independent concrete column according to claim 1, characterized in that: In S1, four anchor bolts are pre-buried.

3. The construction method of the super-high independent concrete column according to claim 1 or 2, characterized in that: In S4, each section of the concrete column is 4.5 m.

4. The construction method of the super-high independent concrete column according to claim 1 or 2, characterized in that: In S4, the first section of concrete columns was poured using the tower crane and hopper pouring method.

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