Four-branch concrete column construction method

Abstract

The invention discloses a four-branch concrete column construction method which comprises the following steps: simulating a constitutive relationship between a trunk and branches through finite element analysis software, and establishing a construction design model; laying a supporting frame according to the construction building design model, and laying a main supporting mold; a first steel pipe is built on the square supporting frame with the top of the main supporting formwork as the center, a formwork is laid on the first steel pipe, and then steel bars are bound in the formwork; after the steel bars are bound, wood braces and second steel pipes are laid on the outer sides of the formworks, the formworks are reinforced, branch formworks are formed, the upward ends of the branch formworks are pouring openings, and the downward ends of the branch formworks are converged to the top of the main formwork and communicate with the main formwork; and concrete is poured through the pouring openings of the branch formworks, the branch formworks and the trunk formwork outside the concrete are removed after the concrete is solidified, and tree-shaped forked concrete is formed. According to the method, the construction building design model is established, the stress balance between the branches and the trunk is calculated and balanced according to a formula, the stability and the bearing capacity of the formwork are effectively improved, and the risks of formwork expansion and formwork explosion are greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of concrete construction, in particular to a four-forked concrete column construction method. Background Art

[0002] In the process of house construction, in order to meet different functional needs or aesthetic requirements, buildings often adopt a variety of designs, including tree-shaped forks, circles, and special inclined structures. However, these complex designs not only significantly increase the difficulty and complexity of construction, but also expose the construction process to greater risks to personal and equipment safety. Traditional construction methods have low flexibility and poor adaptability, resulting in low construction efficiency, which prolongs the project cycle and increases construction costs.

[0003] Traditional formwork methods are usually too simple to cope with complex special-shaped concrete pouring requirements. Especially when dealing with inclined structures, the instability of the formwork is particularly prominent. The force applied to the trunk by the inclined formwork is not easy to calculate. When the pressure applied to the trunk by the inclined formwork is too large, the formwork is prone to expansion and explosion. These technical difficulties not only affect the construction quality, but may also lead to construction delays and additional cost investment. Therefore, it is possible to provide a force calculation method and construction method for tree-shaped four-fork concrete that can efficiently and stably support the pouring of special-shaped concrete and facilitate the calculation of the force analysis between the inclined formwork and the load-bearing trunk. Summary of the invention

[0004] The present invention provides a four-forked concrete column construction method to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for constructing a four-forked concrete column includes a main trunk, a plurality of branches extending in four directions from the top of the main trunk, the inclination angles between the branches and the main trunk are the same, and the angles between adjacent branches are the same, and the construction steps are as follows:

[0007] 1) The constitutive relationship between the trunk and the branch is simulated by finite element analysis software, the influence of the branch on the stress state and deformation of the trunk is analyzed, and the construction design model is established. The calculation formula is as follows:

[0008] The deadweight of the four branches acts on the center of gravity of the branches, so the force of each branch acting on the bottom vertical column is:

[0009] F1+M1=F1+F1×A

[0010] Among them, F1 is the deadweight of the branch, M1 is the bending moment caused by F1 acting on the bottom of the branch, and A is the horizontal distance from the force to the point of action;

[0011] The force exerted by the deadweight of the four branches on the bottom trunk is F=4(F1+M1)=4F1+4F1×A. The trunk is the concentrated part of the force. In order to ensure that the junction between the branches and the trunk does not have problems such as mold explosion and cracking, the external force of the trunk is F'. It should be ensured that the external force of the trunk F'≥F to achieve force balance;

[0012] 2) Laying a support frame according to the construction design model, and laying a main support formwork in the middle of the support frame;

[0013] 3) With the top of the main formwork as the center, build a steel pipe one on the supporting frame in all directions, and the steel pipe one is tilted toward the main formwork in a funnel shape, lay a formwork on the steel pipe one, and then tie steel bars inside the formwork;

[0014] 4) After the reinforcement is tied, wooden beams and steel pipes are laid on the outside of the formwork to reinforce the formwork to form a branch formwork, the upward ends of which are all pouring ports, and the downward ends of each branch formwork converge at the top of the main formwork and are connected to the main formwork;

[0015] 5) pouring concrete through the pouring openings of the branch and trunk formworks, and removing the branch and trunk formworks outside the concrete after the concrete solidifies to form a tree-shaped bifurcated concrete.

[0016] Preferably, in the step 2), the support frame includes a pad, the main support formwork is laid on the central part of the pad, and a plurality of bases are provided on the pad on the outer peripheral side of the main support formwork, and the bases are distributed in a rectangular shape with the same spacing, and vertical poles are fixed on each of the bases, and horizontal poles are connected between each of the vertical poles. The pad is used to support and disperse the pressure of heavy objects to prevent the ground from being crushed or deformed. In addition, the pad can also be used to adjust the height difference to ensure the horizontality of the equipment or structure, thereby improving the overall construction quality. The base is used to evenly transfer the weight of the superstructure to the pad and the foundation, and can also provide sufficient stability to prevent the structure from tilting or collapsing during use.

[0017] Preferably, the height of the vertical poles is gradually increased outwards from the main support formwork as the center, forming a funnel-shaped support frame with a multi-layer stepped top. The vertical poles are distributed vertically to transfer the load of the upper branch support formwork to the pad and foundation, ensuring the stability and safety of the structure.

[0018] Preferably, a scissors brace is obliquely connected between the vertical pole and the horizontal pole. The horizontal pole is used to connect the vertical pole to improve stability and ensure the overall stability and lateral force resistance of the structure. The horizontal pole effectively prevents the structure from deforming or collapsing when subjected to wind load or earthquake by providing lateral support, thereby ensuring the safety and reliability of the structure. The scissors brace is connected obliquely and crosswise to enhance the stability and overall rigidity of the structure. The scissors brace can effectively prevent the vertical pole and the horizontal pole from displacement or deformation when subjected to force, thereby improving the stability and bearing capacity of the entire structural system.

[0019] Preferably, an inclined tie rod is connected between the steel pipe 1 and the corresponding lower horizontal rod, which is used to provide an oblique support force for the steel pipe 1 and the supporting formwork, and improve the connection stability.

[0020] Preferably, the vertical pole, horizontal pole, scissor brace, steel pipe 1 and steel pipe 2 are all connected and installed by fasteners. The fasteners are fixedly connected by mechanical biting, welding or bonding.

[0021] Preferably, in the step 4), the branch formwork is a multi-layer wrapped formwork, and the branch formwork is composed of steel bars, formwork, wooden beams and steel pipes from the inside to the outside.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The tree-shaped four-forked concrete column construction method of the present invention simulates the constitutive relationship between the main trunk and the branch through finite element analysis software, establishes a construction design model, and calculates the force balance between the branch and the main trunk according to the horizontal distance from the branch force to the main trunk action point, the force on the outside of the main trunk, the deadweight of the branch and the bending moment generated on the bottom of the branch through a formula to prevent the branch from collapsing or the main trunk from bursting and cracking due to the excessive deadweight of the branch, and lays the support frame accordingly, thereby improving the accuracy of the calculation and the safety of the construction; and building a steel pipe on the top of the main trunk and laying the formwork together, and then forming a multi-layer wrapped support formwork through steel bars, formwork, wooden beams and steel pipes, which effectively improves the stability and bearing capacity of the formwork, and greatly reduces the risk of formwork expansion and bursting. At the same time, because the force of the forked structure is against the top of the main trunk, an oblique support is formed, which not only improves the overall stability of the formwork, but also significantly improves the construction efficiency, shortens the project cycle, and reduces the construction cost, thereby ensuring the efficient construction and construction of a high-quality and high-safety tree-shaped forked concrete structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the stress state of the present invention;

[0025] Figure 2 It is a side cross-sectional schematic diagram of the overall structure of the present invention;

[0026] Figure 3 It is a cross-sectional schematic diagram of the branch, trunk and branch mold of the present invention;

[0027] Figure 4 It is a schematic diagram of the top surface of the overall structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the tree-shaped bifurcated concrete after solidification of the present invention;

[0029] 1. Main formwork; 2. Branch formwork; 3. Support frame; 4. Base; 5. Vertical pole; 6. Horizontal pole; 7. Scissors brace; 8. Pad; 9. Steel pipe one; 10. Diagonal rod; 11. Fastener; 12. Rebar; 13. Formwork; 14. Wooden beam; 15. Steel pipe two; 16. Casting port; A. Main trunk; B. Branch trunk. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Reference Figure 1-5 A method for constructing a four-branch concrete column includes a main trunk, a plurality of branches extending in four directions from the top of the main trunk, the inclination angles between the branches and the main trunk are the same, and the angles between adjacent branches are the same, and the construction steps are as follows:

[0032] 1) The constitutive relationship between the trunk and the branches is simulated by finite element analysis software, the influence of the branches on the stress state and deformation of the trunk is analyzed, and the construction design model is established. The mechanical analysis calculation formula is as follows:

[0033] The deadweight of the four branches acts on the center of gravity of the branches, so the force of each branch acting on the bottom vertical column is:

[0034] F1+M1=F1+F1×A

[0035] Among them, F1 is the deadweight of the branch, M1 is the bending moment caused by F1 acting on the bottom of the branch, and A is the horizontal distance from the force to the point of action;

[0036] The force exerted by the deadweight of the four branches on the bottom trunk is F=4(F1+M1)=4F1+4F1×A. The trunk is the concentrated part of the force. In order to ensure that the junction between the branches and the trunk does not have problems such as mold explosion and cracking, the external force of the trunk is F'. It should be ensured that the external force of the trunk F'≥F to achieve force balance;

[0037] 2) Laying the support frame 3 according to the construction design model, and laying the main support formwork 1 in the middle of the support frame 3;

[0038] 3) With the top of the main formwork 1 as the center, build a steel pipe 9 on the four-way support frame 3, and the steel pipe 9 is tilted toward the main formwork 1 in a funnel shape, lay a template 13 on the steel pipe 9, and then tie the steel bars 12 inside the template 13;

[0039] 4) After the reinforcement 12 is tied, wooden beams 14 and steel pipes 15 are laid on the outside of the formwork 13 to reinforce the formwork 13 to form a branch formwork 2, the upward ends of which are all pouring ports 16, and the downward ends of each branch formwork 2 are all gathered at the top of the main formwork 1 and are connected to the main formwork 1;

[0040] 5) Concrete is poured through the pouring openings 16 of the branch formworks 2, and after the concrete solidifies, the branch formworks 2 and the main formwork 1 outside the concrete are removed to form a tree-shaped bifurcated concrete.

[0041] In the step 2), the support frame 3 includes a pad 8, and the main formwork 1 is laid on the central part of the pad 8. A plurality of bases 4 are provided on the pad 8 on the outer peripheral side of the main formwork 1. The bases 4 are distributed in a rectangular shape with the same spacing. A vertical pole 5 is fixed on each of the bases 4, and a horizontal pole 6 is connected between each of the vertical poles 5. The pad 8 is used to support and disperse the pressure of heavy objects to prevent the ground from being crushed or deformed. In addition, the pad 8 can also be used to adjust the height difference to ensure the horizontality of the equipment or structure, thereby improving the overall construction quality. The base 4 is used to evenly transfer the weight of the superstructure to the pad 8 and the foundation, and can also provide sufficient stability to prevent the structure from tilting or collapsing during use.

[0042] The height of the vertical poles 5 gradually increases outward from the main support formwork 1 as the center, forming a funnel-shaped support frame 3 with a multi-layer stepped top. The vertical poles 5 are vertically distributed to transfer the load of the upper branch support formwork 2 to the pad 8 and the foundation, ensuring the stability and safety of the structure.

[0043] A scissor brace 7 is obliquely connected between the vertical pole 5 and the horizontal pole 6. The horizontal pole 6 is used to connect the vertical pole 5 to improve stability and ensure the overall stability and lateral force resistance of the structure. The horizontal pole 6 effectively prevents the structure from deforming or collapsing when subjected to wind loads or earthquakes by providing lateral support, thereby ensuring the safety and reliability of the structure. The scissor brace 7 is cross-connected obliquely to enhance the stability and overall rigidity of the structure. The scissor brace 7 can effectively prevent the vertical pole 5 and the horizontal pole 6 from displacement or deformation when subjected to force, thereby improving the stability and bearing capacity of the entire structural system.

[0044] The vertical rod 5, the horizontal rod 6, the scissors brace 7, the steel pipe 1 9, and the steel pipe 2 15 are all connected and installed by the fastener 11. The fastener 11 is fixedly connected by mechanical bite, welding or bonding.

[0045] A diagonal tie rod 10 is connected between the steel pipe 9 and the corresponding lower horizontal rod 6 to provide oblique support force for the steel pipe 9 and the support formwork 2, while improving the connection stability.

[0046] In the step 4), the branch formwork 2 is a multi-layer wrapped formwork, and the branch formwork 2 comprises steel bars 12, formwork 13, wooden beams 14, and steel pipes 15 from the inside to the outside.

[0047] The present invention establishes a construction design model and calculates the force balance between the balanced branches and the main trunk according to a formula, thereby effectively improving the stability and bearing capacity of the template 13 and greatly reducing the risk of mold expansion and explosion.

[0048] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0049] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for constructing a four-branch concrete column, characterized in that: It includes a main trunk, and four branches extend in four directions from the top of the main trunk. The inclination angles between the branches and the main trunk are the same, and the angles between adjacent branches are the same. The construction steps are as follows: 1) The constitutive relationship between the trunk and the branch is simulated by finite element analysis software, the influence of the branch on the stress state and deformation of the trunk is analyzed, the construction design model is established, and the calculation formula is as follows: The deadweight of the four branches acts on the center of gravity of the branches, so the force of each branch acting on the bottom vertical column is: F1+M1=F1+F1×A Among them, F1 is the deadweight of the branch, M1 is the bending moment caused by F1 acting on the bottom of the branch, and A is the horizontal distance from the force to the point of action; The force exerted by the deadweight of the four branches on the bottom trunk is F=4(F1+M1)=4F1+4F1×A. The trunk is the concentrated part of the force, and the external force of the trunk is F'. It should be ensured that the external force of the trunk F'≥F to achieve force balance; 2) laying a support frame (3) according to the construction design model, and laying a main support formwork (1) in the middle of the support frame (3); 3) With the top of the main support formwork (1) as the center, a steel pipe (9) is built on the four-sided support frame (3), and the steel pipe (9) is tilted toward the main support formwork (1) in a funnel shape, and a template (13) is laid on the steel pipe (9), and then steel bars (12) are tied inside the template (13); 4) After the reinforcement (12) is tied, wooden beams (14) and steel pipes (15) are laid on the outside of the formwork (13) to reinforce the formwork (13) to form a branch formwork (2), wherein the upward ends of the branch formworks (2) are all pouring ports (16), and the downward ends of the branch formworks (2) are all gathered at the top of the main formwork (1) and are all connected to the main formwork (1); 5) Concrete is poured through the pouring openings (16) of the branch formworks (2), and after the concrete solidifies, the branch formworks (2) and the main formwork (1) outside the concrete are removed to form tree-shaped bifurcated concrete.

2. The tree-shaped bifurcated concrete construction method according to claim 1, characterized in that: In the step 2), the support frame (3) comprises a pad (8), the main support formwork (1) is laid on the central part of the pad (8), a plurality of bases (4) are provided on the pad (8) on the outer peripheral side of the main support formwork (1), the bases (4) are distributed in a rectangular shape with the same spacing, each of the bases (4) is fixed with a vertical pole (5), and each of the vertical poles (5) is connected with a horizontal pole (6).

3. The tree-shaped bifurcated concrete construction method according to claim 2, characterized in that: The height of the vertical poles (5) is gradually increased outwards with the main support formwork (1) as the center, forming a funnel-shaped support frame (3) with a multi-layer stepped top.

4. The tree-shaped bifurcated concrete construction method according to claim 3 is characterized in that: A scissor brace (7) is obliquely connected between the vertical rod (5) and the horizontal rod (6).

5. The tree-shaped bifurcated concrete construction method according to claim 3, characterized in that: In the step 3), a diagonal tie rod (10) is connected between the steel pipe 1 (9) and the corresponding horizontal rod (6) below.

6. The tree-shaped bifurcated concrete construction method according to claim 4, characterized in that: The vertical rod (5), horizontal rod (6), scissor brace (7), steel pipe 1 (9) and steel pipe 2 (15) are all connected and installed via fasteners (11).

7. The tree-shaped bifurcated concrete construction method according to claim 1, characterized in that: In the step 4), the branch formwork (2) is a multi-layer wrapped formwork, and the branch formwork (2) comprises steel bars (12), formwork (13), wooden beams (14), and steel pipes (15) from the inside to the outside.

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