A method for pouring concrete columns

Abstract

This invention relates to a method for inspecting concrete columns. The method includes: first, constructing the foundation; second, constructing the first section of the concrete column body; third, constructing the surface layer of the first section; fourth, constructing the extension section of the concrete column body; fifth, constructing the surface layer of the extension section; repeating steps four and five to complete the construction of the remaining part of the concrete column. This invention aims to provide a method for inspecting concrete columns in which the column body and inspection are completed simultaneously, solving the problem of long construction cycles caused by the staggered completion of concrete column inspection and pouring in existing methods.

Description

Technical Field

[0001] This invention relates to the field of building technology, and specifically to a method for pouring concrete columns. Background Technology

[0002] During bridge construction, concrete columns need to be poured. During the construction of these columns, their size needs to be checked and their surface leveled. If the size is insufficient, a surface layer needs to be added to increase the thickness to meet the requirements. Current methods involve first pouring the entire concrete column, then checking it, and repairing any discrepancies to form the new surface layer. This process requires multiple construction platform setups, resulting in high construction costs and a long construction period. Summary of the Invention

[0003] The present invention aims to provide a concrete column pouring method that simultaneously completes the column body and inspection, solving the problem of long construction cycle caused by the staggered completion of concrete column inspection and pouring in the existing method.

[0004] The above technical problems are solved by the following technical solution: A method for pouring concrete columns, characterized in that the outer diameter of the concrete column is simultaneously measured when pouring the concrete column using a concrete column forming mold. The concrete column forming mold includes a concrete column body forming sleeve and a column surface forming sleeve fitted outside the concrete column body forming sleeve. The column surface forming sleeve is connected to the concrete column body forming sleeve via a lifting mechanism. The column surface forming sleeve is connected to the lifting mechanism and can extend downwards out of the concrete column body forming sleeve. The column surface forming sleeve is provided with grouting holes, and a construction platform is connected to the concrete column body forming sleeve. The process of simultaneously measuring the outer diameter of a concrete column by casting it using a concrete column forming mold is as follows: Step 1: Foundation Construction: Concrete column foundation piles are poured on the ground. The concrete column body forming sleeve is supported on these piles. A concrete column reinforcing steel skeleton is placed on the piles and connected to a steel joint on the pile. The reinforcing steel skeleton is located inside the concrete column body forming sleeve. Step 2: Construction of the First Section of the Concrete Column Body: Concrete is poured into the concrete column body forming sleeve. This concrete, together with the reinforcing steel skeleton, forms the first section of the concrete column body. Step 3: Constructing the first section of the column surface: The concrete column body forming sleeve is raised to a set height, and the sleeve is kept in a state where its lower end is fitted onto the first section of the concrete column body. The lifting mechanism drives the column surface forming sleeve to descend until it is supported on the concrete column foundation pile. A cavity for the first section of the column surface is formed between the column surface forming sleeve and the first section of the concrete column body. Cement grout is injected through the grouting hole to fill the cavity. The cement grout in the cavity solidifies to form the first section of the column surface. Step 4: Constructing the heightening section of the concrete column body: Concrete is poured into the concrete column body forming sleeve. The concrete is the same as the concrete column reinforcement. The framework is poured together to form the heightened section of the concrete column body; the fifth step is to construct the surface layer of the heightened section: the concrete column body forming sleeve is raised to the set height, and the concrete column body forming sleeve is still in the state where the lower end is still fitted on the heightened section of the concrete column body. The column surface forming sleeve is in the state where the lower end is fitted on the already constructed column surface. A cavity for the surface layer of the heightened section is formed between the column surface forming sleeve and the concrete column body heightened section. Cement grout is injected through the grouting hole to fill the cavity for the surface layer of the heightened section. The cement grout in the cavity for the surface layer of the heightened section of the column solidifies to form the surface layer of the heightened section of the column; repeat steps four and five to complete the construction of the remaining part of the concrete column.This technical solution involves simultaneously forming the concrete column body using a forming sleeve, and simultaneously inspecting and repairing it using a forming sleeve on the column surface. This eliminates the need for a secondary construction platform. The steel reinforcement skeleton of the column and the surface of the poured column serve as the support for the mold, eliminating the need for additional support structures or cranes. This results in low construction costs and a short construction period.

[0005] Preferably, the inner circumferential surface of the concrete column forming sleeve is provided with a rubber layer, forming an air cavity between the rubber layer and the concrete column forming sleeve. This air cavity is equipped with an inflation / deflation port. Before pouring concrete into the concrete column forming sleeve, the air cavity is inflated through the inflation / deflation port until the rubber layer bulges. Before lifting the concrete column forming sleeve, the gas in the air cavity is released through the inflation / deflation port, causing a pressure drop in the air cavity. Under the pressure difference between the inside and outside of the air cavity, the rubber layer contracts towards the air cavity, causing it to detach from the concrete. When the concrete column forming sleeve is a single unit, demolding is convenient. To facilitate support of the rubber layer, a release agent is applied to its surface. Existing demolding methods involve disassembling the mold, which leads to inconvenience and trouble during construction.

[0006] Preferably, the air cavity is equipped with several springs that drive the rubber layer to move into the air cavity. Before the concrete is poured into the molding sleeve of the concrete column body, the air pressure in the air cavity is such that the rubber layer is inflated and the springs are in a stretched state. Before lifting the molding sleeve of the concrete column body, the air cavity is released, causing the springs to contract and drive the rubber layer to separate from the concrete. This reduces the cost of demolding. Demolding by pressure difference alone can only achieve a maximum pressure difference of 1 atmosphere, which may result in incomplete demolding and require several auxiliary methods. This method does not require these auxiliary methods and can achieve demolding with higher spring force.

[0007] As a preferred method, the concrete column forming sleeve is lifted by using a hoist suspended from the steel reinforcement cage of the concrete column. This eliminates the need for an additional support structure for the mold, resulting in lower construction costs.

[0008] Preferably, the lower end face of the concrete column forming sleeve is provided with several jack storage holes distributed circumferentially along the concrete column forming sleeve. An electric jack is installed in each jack storage hole, comprising a jack body and a jack rod. The jack body is slidably and sealingly connected to the jack storage hole, and the jack rod is fixed to the top wall of the jack storage hole. When the electric jack is in the retracted state, it is completely contained within the jack storage hole. When the electric jack is extended to its limit, the jack body remains inserted within the jack storage hole and seals it. When lifting the concrete column forming sleeve, the electric jack is used to lift it first. This improves the reliability of the reinforcing steel frame under stress during mold lifting. Simultaneously, it provides auxiliary support for the mold from the column, allowing the mold to be reliably supported without the need for separate mold support and fixing components.

[0009] Preferably, the lower end of the inner circumferential surface of the column surface forming sleeve is provided with a scraper ring extending circumferentially along the column surface forming sleeve; in the third and fifth steps, the column surface forming sleeve is reciprocated and raised, so that the scraper ring scrapes the surface of the cement slurry that has not yet solidified to achieve a smooth surface of the column. The smoothness of the column surface can be assessed.

[0010] Preferably, the surface of the scraper ring is provided with a mirror layer.

[0011] Preferably, the lifting mechanism includes several vertical cylinders distributed circumferentially along the concrete column body forming sleeve. The cylinders extend and retract upwards. The lower end of the outer circumferential surface of the concrete column body forming sleeve is provided with a support ring extending circumferentially along the concrete column body forming sleeve. The cylinder body is connected to the support ring, and the piston rod of the cylinder is connected to the column surface forming sleeve. When the cylinder is in the contracted state, the lower end of the column surface forming sleeve extends out of the concrete column body forming sleeve. When the cylinder is in the extended state, the lower end face of the column surface forming sleeve and the lower end face of the concrete column body forming sleeve are located on the same plane.

[0012] Preferably, when the cylinder is in the extended state, the upper end of the column surface forming sleeve is located below the construction platform, and the piston rod is connected to the column surface forming sleeve through a vertical lifting rod passing through the construction platform.

[0013] Preferably, the outer circumferential surface of the supporting ring is coaxial with the inner circumferential surface of the concrete column body forming sleeve; during the cylinder extension and retraction, the inner circumferential surface of the column surface forming sleeve abuts against the outer circumferential surface of the supporting ring. This ensures a uniform surface layer thickness. The beneficial effects of this invention are: the outer diameter of the concrete column is detected simultaneously with the pouring of the concrete column body, ensuring that the concrete column meets the requirements immediately upon pouring, eliminating the need for further testing and repairs, and avoiding the need for multiple construction platform setups, thus shortening the construction cycle and reducing construction costs. Attached Figure Description

[0014] Figure 1 A schematic diagram of a concrete column forming mold;

[0015] Figure 2 for Figure 1 A magnified view of a portion of point A;

[0016] Figure 3 This is a schematic diagram of the first section of the concrete column body after it has just been poured.

[0017] Figure 4 This is a schematic diagram of the first section of the concrete column body after it has been demolded.

[0018] Figure 5 A schematic diagram of the concrete column body forming sleeve being lifted only by an electric jack.

[0019] Figure 6 A schematic diagram showing the concrete column body forming sleeve stretched to a set height and the column surface forming sleeve descending to support the concrete column foundation pile.

[0020] Figure 7 This diagram shows the first section of the concrete column body, including the heightened section and the surface layer of the first section. The diagram includes: 1. Concrete column body forming sleeve; 2. Column surface forming sleeve; 4. Grouting hole; 5. Construction platform; 3. Cylinder; 6. Support ring; 7. Vertical lifting rod; 8. Rubber layer; 9. Air cavity; 10. Spring; 11. Jack storage hole; 12. Electric jack; 13. Jack body; 14. Jack top rod; 15. Scraper ring; 16. Ground; 17. Concrete column foundation pile; 18. Concrete column steel reinforcement cage; 19. First section of concrete column body; 20. Column first section surface cavity; 21. Column first section surface layer; 22. Concrete column body heightened section; 23. Hoist; 24. Gap; 25. Cylinder body; 26. Cylinder piston rod. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] See Figures 1 to 7A method for pouring concrete columns, wherein the outer diameter of the concrete column is simultaneously measured when pouring the concrete column using a concrete column forming mold. The concrete column forming mold includes a concrete column body forming sleeve 1 and a column surface forming sleeve 2 fitted outside the concrete column body forming sleeve. The column surface forming sleeve is connected to the concrete column body forming sleeve through a lifting mechanism. The column surface forming sleeve is connected to the lifting mechanism and can extend downwards out of the concrete column body forming sleeve. The column surface forming sleeve is provided with grouting holes 4, and a construction platform 5 is connected to the concrete column body forming sleeve. The lifting mechanism includes several vertical cylinders 3 distributed circumferentially along the concrete column body forming sleeve. The cylinders extend and retract upwards. A supporting ring 6 extending circumferentially from the lower end of the outer circumference of the concrete column body forming sleeve is provided. The cylinder body 25 is connected to the supporting ring, and the piston rod 26 is connected to the column surface forming sleeve. When the cylinder is in the retracted state, the lower end of the column surface forming sleeve extends out of the concrete column body forming sleeve. When the cylinder is in the extended state, the lower end face of the column surface forming sleeve is on the same plane as the lower end face of the concrete column body forming sleeve. When the cylinder is in the extended state, the upper end of the column surface forming sleeve is located below the construction platform, and the piston rod is connected to the column surface forming sleeve via a vertical lifting rod 7 passing through the construction platform. The outer circumferential surface of the supporting ring is coaxial with the inner circumferential surface of the concrete column forming sleeve; during the extension and retraction of the cylinder, the inner circumferential surface of the column surface forming sleeve abuts against the outer circumferential surface of the supporting ring. A rubber layer 8 is provided on the inner circumferential surface of the concrete column forming sleeve, forming an air cavity 9 between the rubber layer and the concrete column forming sleeve, with an inflation / deflation port. Several springs 10 are provided inside the air cavity to drive the rubber layer to move into the air cavity. The lower end face of the concrete column forming sleeve is provided with several jack storage holes 11 distributed circumferentially along the concrete column forming sleeve. An electric jack 12 is installed in each jack storage hole. The electric jack includes a jack body 13 and a jack rod 14. The jack body is slidably and sealingly connected to the jack storage hole, and the jack rod is fixed to the top wall of the jack storage hole. When the electric jack is in the retracted state, it is completely contained within the jack storage hole. When the electric jack is extended to its limit, the jack body still passes through the jack storage hole and seals it. A scraper ring 15 extending circumferentially along the inner circumference of the column surface forming sleeve is provided at the lower end of the sleeve. The surface of the scraper ring has a mirror finish.

[0023] The process of simultaneously completing the outer diameter inspection by casting concrete columns using concrete column forming molds is as follows: Step 1: Foundation Construction: Concrete column foundation piles 17 are poured on ground 16. The concrete column body forming sleeve is supported on the concrete column foundation piles. The concrete column reinforcing steel skeleton 18 is placed on the concrete column foundation piles and connected to the steel joints on the concrete column foundation piles. The concrete column reinforcing steel skeleton is located inside the concrete column body forming sleeve. Step 2: Construction of the First Section of the Concrete Column Body: Concrete is poured into the concrete column body forming sleeve, and the concrete and the concrete column reinforcing steel skeleton are poured together to form the first section 19 of the concrete column body. Step 3: Construction of the Column First Section Surface: The concrete column body forming sleeve is raised to a set height, and the concrete column body forming sleeve is kept in a state where its lower end is fitted onto the first section of the concrete column body. The lifting mechanism drives the column surface forming sleeve to descend and support it on the concrete column foundation piles. The column surface forming sleeve and the first section of the concrete column body... The first section of the column is formed by two segments, creating a surface cavity 20. Cement grout is injected through the grouting holes to fill the surface cavity. The cement grout in the surface cavity solidifies to form the surface layer 21 of the first section of the column. The fourth step is to construct the heightened section of the concrete column body: concrete is poured into the forming sleeve of the concrete column body, and the concrete is poured together with the concrete column's reinforcing steel frame to form the heightened section 22 of the concrete column body. The fifth step is to construct the surface layer of the heightened section: the forming sleeve of the concrete column body is raised to a set height and... The concrete column body forming sleeve remains in the state where its lower end is still fitted onto the heightened section of the concrete column body, while the column surface forming sleeve is in the state where its lower end is fitted onto the already constructed column surface. A cavity for the heightened section of the column is formed between the column surface forming sleeve and the heightened section of the concrete column body. Cement grout is injected through the grouting holes to fill the cavity for the heightened section of the column surface. The cement grout in the cavity for the heightened section of the column surface solidifies to form the surface of the heightened section of the column. Steps four and five are repeated to complete the construction of the remaining part of the concrete column.

[0024] Furthermore: Before pouring concrete into the molding sleeve of the concrete column body, the air chamber is inflated through the air inlet until the rubber layer bulges. The air pressure in the air chamber is such that the rubber layer bulges and the spring is in a stretched state. Before lifting the molding sleeve of the concrete column body, the air in the air chamber is released through the air inlet, causing the air chamber to depressurize. Under the action of the pressure difference inside and outside the air chamber and the contraction force of the spring, the rubber layer contracts into the air chamber, causing the rubber layer to separate from the concrete, forming a gap 24. This ensures that the concrete column body is not obstructed when lifting the molding mold. When lifting the molding sleeve of the concrete column body, the hoist 23 is used to pull the molding sleeve of the concrete column through the reinforcing steel skeleton. When lifting the molding sleeve of the concrete column body, the electric jack is first used to lift the molding sleeve of the concrete column body. Steps three and five involve reciprocating the raising and lowering of the column surface forming sleeve, which allows the scraper ring to smooth the surface of the un-solidified cement slurry, thus achieving a smooth column surface. The reinforcing steel frame is initially overlapped to a certain height, and then heightened after a section of the column has been poured.

Claims

1. A method for pouring concrete columns, characterized in that, When pouring concrete columns using a concrete column forming mold, the outer diameter of the concrete column is simultaneously measured. The concrete column forming mold includes a main forming sleeve for the concrete column body and a surface forming sleeve fitted over the main forming sleeve. The surface forming sleeve is connected to the main forming sleeve via a lifting mechanism. The surface forming sleeve extends downwards from the main forming sleeve and has grouting holes. A construction platform is connected to the main forming sleeve. The outer diameter is measured simultaneously when pouring the concrete column using the forming mold. The testing process is as follows: Step 1: Foundation Construction: Concrete column foundation piles are poured on the ground. The concrete column body forming sleeve is supported on the concrete column foundation piles. The concrete column reinforcement cage is placed on the concrete column foundation piles, and the concrete column reinforcement cage is connected to the steel joint on the concrete column foundation piles. The concrete column reinforcement cage is located inside the concrete column body forming sleeve. Step 2: Construction of the First Section of the Concrete Column Body: Concrete is poured into the concrete column body forming sleeve. The concrete and the concrete column reinforcement cage are poured together to form the first section of the concrete column body. Step 3: Construction of the Column First Section Surface Layer: The concrete... The concrete column body forming sleeve is raised to the set height, and the lower end of the concrete column body forming sleeve is fitted onto the first section of the concrete column body. The lifting mechanism drives the column surface forming sleeve to descend and support it on the concrete column foundation pile. A surface cavity for the first section of the column is formed between the column surface forming sleeve and the first section of the concrete column body. Cement grout is injected through the grouting hole to fill the surface cavity of the first section of the column body. The cement grout in the surface cavity of the first section of the column body solidifies to form the surface of the first section of the column. The fourth step is to construct the heightened section of the concrete column body: concrete is poured into the concrete column body forming sleeve, and the concrete is poured together with the concrete column steel reinforcement skeleton to form Step 5: Constructing the surface layer of the concrete column body: Raise the concrete column body forming sleeve to the set height, keeping the lower end of the forming sleeve still fitted onto the concrete column body's heightened section. The column surface forming sleeve is in a position where its lower end is fitted onto the already constructed column surface. A cavity for the column heightened section's surface layer is formed between the column surface forming sleeve and the concrete column body's heightened section. Cement grout is injected through the grouting holes to fill the cavity for the column heightened section's surface layer. The cement grout in the cavity for the column heightened section's surface layer solidifies to form the surface layer of the column heightened section. Repeat steps 4 and 5 to complete the construction of the remaining part of the concrete column.

2. The method for pouring concrete columns according to claim 1, characterized in that, A rubber layer is provided on the inner circumferential surface of the concrete column forming sleeve, and an air cavity is formed between the rubber layer and the concrete column forming sleeve. The air cavity is provided with an air filling and venting port. Before pouring concrete into the concrete column forming sleeve, the air cavity is inflated through the air filling and venting port until the rubber layer bulges. Before lifting the concrete column forming sleeve, the gas in the air cavity is released through the air filling and venting port, which reduces the pressure in the air cavity. Under the action of the pressure difference between the inside and outside of the air cavity, the rubber layer contracts towards the air cavity, causing the rubber layer to separate from the concrete.

3. The method for pouring concrete columns according to claim 2, characterized in that, The air chamber is equipped with several springs that drive the rubber layer to move into the air chamber; before the concrete is poured into the molding sleeve of the concrete column body, the air pressure in the air chamber is such that the rubber layer is inflated and the spring is in a stretched state; before the molding sleeve of the concrete column body is lifted, the air chamber is released, causing the spring to contract and drive the rubber layer to separate from the concrete.

4. A method for pouring concrete columns according to claim 1, 2, or 3, characterized in that, When lifting the forming sleeve of the concrete column body, a hoist is used to pull the forming sleeve of the concrete column body by hanging it on the steel reinforcement cage of the concrete column.

5. A method for pouring concrete columns according to claim 1, 2, or 3, characterized in that, The lower end face of the concrete column forming sleeve is provided with several jack storage holes distributed circumferentially along the concrete column forming sleeve. An electric jack is installed in each jack storage hole. The electric jack includes a jack body and a jack rod. The jack body is slidably and sealingly connected to the jack storage hole, and the jack rod is fixed to the top wall of the jack storage hole. When the electric jack is in the retracted state, it is completely contained within the jack storage hole. When the electric jack is extended to its limit, the jack body still passes through the jack storage hole and seals it. When lifting the concrete column forming sleeve, the electric jack is used to lift the concrete column forming sleeve first.

6. A method for pouring concrete columns according to claim 1, 2, or 3, characterized in that, The lower end of the inner circumference of the column surface forming sleeve is provided with a scraper ring extending circumferentially along the column surface forming sleeve; in the third and fifth steps, the column surface forming sleeve is raised and lowered repeatedly, so that the scraper ring scrapes the surface of the cement slurry that has not solidified to achieve a smooth surface of the column.

7. A method for pouring concrete columns according to claim 6, characterized in that, The surface of the scraper ring is provided with a mirror layer.

8. A method for pouring concrete columns according to claim 1, 2, or 3, characterized in that, The lifting mechanism includes several vertical cylinders distributed circumferentially along the concrete column body forming sleeve. The cylinders extend and retract upwards. The lower end of the outer circumferential surface of the concrete column body forming sleeve is provided with a support ring extending circumferentially along the concrete column body forming sleeve. The cylinder body is connected to the support ring, and the piston rod of the cylinder is connected to the column surface forming sleeve. When the cylinder is in the retracted state, the lower end of the column surface forming sleeve extends out of the concrete column body forming sleeve. When the cylinder is in the extended state, the lower end face of the column surface forming sleeve and the lower end face of the concrete column body forming sleeve are on the same plane.

9. A method for pouring concrete columns according to claim 8, characterized in that, When the cylinder is in the extended state, the upper end of the column surface forming sleeve is located below the construction platform, and the piston rod is connected to the column surface forming sleeve through a vertical lifting rod passing through the construction platform.

10. A method for pouring concrete columns according to claim 8, characterized in that, The outer circumferential surface of the support ring is coaxial with the inner circumferential surface of the concrete column body forming sleeve; during the extension and retraction of the cylinder, the inner circumferential surface of the column surface forming sleeve abuts against the outer circumferential surface of the support ring.

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