A positioning and fixing device for fabricated latticed columns and a construction method thereof

Abstract

The application belongs to the technical field of building engineering construction, and particularly relates to a positioning and fixing device for a fabricated latticed column and a construction method thereof, which comprises a guide groove arranged in a steel reinforcement cage, the internal dimension of the guide groove is larger than the external dimension of the latticed column, the latticed column is fixedly connected to the inside of the guide groove, a fixing support is arranged outside the guide groove, and the guide groove is fixed in the inside of the steel reinforcement cage through the fixing support. The guide channel of the guide groove provides stable transverse constraint for the lowering process of the latticed column, avoids the deviation, inclination and collision with the main reinforcement of the steel reinforcement cage of the latticed column, ensures the final plan position and perpendicularity of the latticed column, and improves the overall construction quality and structural reliability of the latticed column.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, specifically a prefabricated lattice column positioning and fixing device and its construction method. Background Technology

[0002] In deep foundation pit support or superstructure construction, it is often necessary to insert lattice columns into the reinforcing cage of cast-in-place piles to form stiffened columns or permanent load-bearing columns. The traditional construction method is to first hoist the reinforcing cage into the pile hole, and then lower the lattice column into the cage from the air or through rough manual positioning. Due to the large internal space of the reinforcing cage and the lack of effective lateral restraint, the lattice column is prone to displacement, tilting, or collision with the main reinforcement of the reinforcing cage during the lowering process. This leads to the final positioning deviation of the lattice column, and the inability to guarantee its verticality. This, in turn, affects subsequent processes (such as the connection between the lattice column and the horizontal support beam), and may even reduce the load-bearing capacity and safety of the structure.

[0003] Existing auxiliary positioning methods mainly use temporary steel reinforcement limiting openings welded together. This involves welding four steel bars into a "U"-shaped limiting structure inside the steel cage. However, this method suffers from poor stability, unreliable positioning, low on-site installation efficiency, and susceptibility to construction disturbances. Furthermore, fixing the lattice column to the steel cage requires on-site welding using an electric welding machine, which poses a fire hazard due to open flames. Summary of the Invention

[0004] To address the problems mentioned above, this invention provides a prefabricated lattice column positioning and fixing device and its construction method. Through the guide channel of the guide groove, a stable lateral constraint is provided for the lowering process of the lattice column, avoiding the offset, tilting and collision of the lattice column with the main reinforcement of the steel cage. This ensures the final planar position and verticality of the lattice column, and improves the overall construction quality and structural reliability of the lattice column.

[0005] The present invention provides a prefabricated lattice column positioning and fixing device, including a guide groove disposed inside a reinforcing cage, wherein the internal dimension of the guide groove is larger than the external dimension of the lattice column, the lattice column is fixedly connected inside the guide groove, and a fixing bracket is disposed outside the guide groove, the guide groove being fixed inside the reinforcing cage by the fixing bracket.

[0006] Furthermore, the guide groove includes four angle steels of the same specification, and the four angle steels are respectively fixed to the four corners of the fixed bracket.

[0007] Furthermore, a connecting plate is fixedly connected between two adjacent angle steels.

[0008] Furthermore, the fixing bracket includes four steel bars, which are arranged in a grid pattern.

[0009] Furthermore, the guide groove is provided with a plurality of first bolt holes, and the lattice column is provided with a plurality of second bolt holes. The first bolt holes and the second bolt holes are arranged in a one-to-one correspondence and bolts are inserted through them.

[0010] The present invention also provides a construction method for a prefabricated lattice column positioning and fixing device, comprising the following steps: S1. Reinforcing cage fabrication: The reinforcing cage for the cast-in-place pile is fabricated on a roll welding machine. The longitudinal main bars are laid out and evenly distributed around the pile. Spiral stirrups are welded to form a complete cage structure. S2. Welding the guide groove into a whole: Select four angle steels according to the size of the lattice column, use auxiliary clamps to position the angle steels in pairs to ensure that the internal size of the guide groove is larger than the external size of the lattice column, and then weld the four angle steels into a rigid integral guide groove structure by connecting plates. S3. Guide groove is sent into the steel cage: The welded guide groove is pushed into the steel cage along the length of the steel cage and positioned. S4. Welding guide groove fixing bracket: Place steel bars at a preset position around the guide groove and weld them into a grid-shaped fixing bracket. Weld the fixing bracket to the outside of the guide groove for fixation. S5. Welding and fixing the guide groove to the reinforcing cage: Use a crane to lift the guide groove and keep it in the center of the reinforcing cage. Then, weld the fixing bracket to the longitudinal main reinforcement of the reinforcing cage. S6. Pile hole construction: Mark the pile hole position on the ground, drive in steel casing, use a rotary drilling rig to excavate the pile hole, clean the hole, and check the hole quality. S7. Reinforcing cage hoisting into pile hole: The welded positioning and fixing device and the reinforcing cage are hoisted into the pile hole as a whole at the construction site, with the reinforcing cage protruding above the ground, ensuring that the first bolt hole on the guide groove is exposed. S8. Installation of lattice column: Lift the lattice column, align its bottom end with the guide groove entrance at the top of the steel cage, and slowly lower it. Under the constraint of the guide groove, the four corners of the lattice column will automatically center and remain vertical until it is lowered to the position corresponding to the first bolt hole. S9. Connection and fixing of lattice column and guide groove: Insert bolts into the corresponding first bolt holes and second bolt holes and tighten them to fix the lattice column and guide groove, so that the steel cage and lattice column form a whole. S10. Overall lowering and adjustment: Use a crane to continue lowering the steel cage to the bottom of the pile hole, and adjust the verticality and planar position of the lattice column; S11. Concrete pouring: After the lattice column is installed, insert the guide pipe from the top of the lattice column and pour the pile body concrete. After the concrete pouring is completed, pull out the guide pipe and steel casing in sequence.

[0011] Furthermore, in step S1, cement blocks are tied around the outer periphery of the reinforcing cage, and the cement blocks fill the space between the reinforcing cage and the pile hole wall.

[0012] Furthermore, in step S7, temporary reinforcing bars with a length greater than the diameter of the pile hole are inserted into the reinforcing cage to temporarily support the reinforcing cage on the steel casing; in step S10, before lowering the reinforcing cage, a crane is used to lift the reinforcing cage upwards, the temporary reinforcing bars on the steel casing are removed, and then the reinforcing cage is lowered.

[0013] Furthermore, steps S1 to S5 are carried out in the processing plant, while steps S6 to S11 are carried out at the construction site.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention provides a stable lateral constraint for the lowering process of the lattice column through the guide channel of the guide groove, avoids the offset and tilt of the lattice column in the steel cage and the collision with the main reinforcement of the steel cage, ensures the final planar position and verticality of the lattice column, and improves the overall construction quality and structural reliability of the lattice column.

[0015] (2) The present invention can quickly adapt to lattice columns with different cross-sectional dimensions by replacing angle steel of different specifications or adjusting its installation position on the fixed bracket.

[0016] (3) The lattice column is bolted to the guide groove, thereby fixing the lattice column to the steel cage, avoiding welding and hot work on the construction site, and reducing construction safety hazards. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the overall structure of the positioning and fixing device for prefabricated lattice columns; Figure 2 A schematic diagram showing the installation of the positioning and fixing device inside the reinforcing cage; Figure 3 A flowchart of the construction method; Explanation of reference numerals in the attached drawings: 1. Reinforcing cage; 2. Guide groove; 3. Lattice column; 4. Fixed bracket; 5. Connecting plate; 6. First bolt hole; 7. Second bolt hole. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0020] The following is in conjunction with the appendix Figure 1 To be continued Figure 3 The invention is described in detail with specific embodiments.

[0021] Reference Figures 1-3 This invention provides a prefabricated lattice column positioning and fixing device, including a guide groove 2 disposed inside a reinforcing cage 1. The internal dimensions of the guide groove 2 are larger than the external dimensions of the lattice column 3. The lattice column 3 is fixedly connected inside the guide groove 2. A fixing bracket 4 is disposed outside the guide groove 2, and the guide groove 2 is fixed inside the reinforcing cage 1 by the fixing bracket 4. This invention provides stable lateral constraints for the lowering process of the lattice column 3 through the guiding channel of the guide groove 2, avoiding the offset, tilting, and collision of the lattice column 3 with the main reinforcement of the reinforcing cage 1 within the reinforcing cage 1. This ensures the final planar position and verticality of the lattice column 3, improving the overall construction quality and structural reliability of the lattice column 3.

[0022] Furthermore, the guide groove 2 includes four angle steels of the same specification, which are respectively fixed to the four corners of the fixed bracket 4. This invention can quickly adapt to lattice columns 3 with different cross-sectional dimensions by replacing the angle steels with different specifications or adjusting their installation positions on the fixed bracket 4.

[0023] Furthermore, a connecting plate 5 is fixedly connected between two adjacent angle steels. The connecting plate 5 fixes the four angle steels into a rectangular whole, which improves the overall strength and stability of the guide groove 2.

[0024] Furthermore, the fixed bracket 4 includes four steel bars arranged in a grid pattern.

[0025] Furthermore, the guide groove 2 has multiple first bolt holes 6, and the lattice column 3 has multiple second bolt holes 7. The first bolt holes 6 and the second bolt holes 7 are arranged in a one-to-one correspondence and bolts are inserted through them. The lattice column 3 is connected to the guide groove 2 by bolts, thereby fixing the lattice column 3 to the reinforcing cage 1, avoiding welding and hot work operations on the construction site, and reducing construction safety hazards.

[0026] The present invention also provides a construction method for a prefabricated lattice column positioning and fixing device, comprising the following steps: S1. Fabrication of Reinforcing Cage 1: The reinforcing cage 1 of the cast-in-place pile is fabricated on a roll welding machine. The longitudinal main bars are laid out and evenly distributed around the pile. Spiral stirrups are welded to form a complete cage structure. S2. Guide groove 2 is welded into a whole: Select four angle steels according to the size of the lattice column 3, use auxiliary clamps to position the angle steels in pairs to ensure that the internal size of the guide groove 2 is larger than the external size of the lattice column 3, and then weld the four angle steels into a rigid whole guide groove 2 structure by connecting lacing plate 5. S3. Guide groove 2 is sent into steel cage 1: Push the welded guide groove 2 into the steel cage 1 along the length of the steel cage 1 and position it. S4. Welding guide groove 2 fixing bracket 4: Place steel bars at a preset position around the guide groove 2 and weld them into a grid-shaped fixing bracket 4. Weld the fixing bracket 4 to the outside of the guide groove 2 for fixing. S5. Welding and fixing the guide groove 2 to the reinforcing cage 1: Use a crane to lift the guide groove 2 and keep it in the center position inside the reinforcing cage 1. Then weld the fixing bracket 4 to the longitudinal main bar of the reinforcing cage 1 firmly. S6. Pile hole construction: Mark the pile hole position on the ground, drive in steel casing, use a rotary drilling rig to excavate the pile hole, clean the hole, and check the hole quality. S7. Reinforcing cage 1 is hoisted into the pile hole: The welded positioning and fixing device and reinforcing cage 1 are hoisted into the pile hole as a whole at the construction site. The reinforcing cage 1 is exposed above the ground, ensuring that the first bolt hole 6 on the guide groove 2 is exposed. S8. Installation of lattice column 3: Lift the lattice column 3, align its bottom end with the entrance of the guide groove 2 on the upper part of the steel cage 1, and slowly lower it. Under the constraint of the guide groove 2, the four corners of the lattice column 3 will automatically center and remain vertical until it is lowered to the position corresponding to the first bolt hole 6. S9. Connection and fixation of lattice column 3 and guide groove 2: Insert bolts into the corresponding first bolt hole 6 and second bolt hole 7 and tighten them to fix the lattice column 3 and guide groove 2, so that the steel cage 1 and lattice column 3 form a whole. S10. Overall lowering and adjustment: Use a crane to continue lowering the steel cage 1 to the bottom of the pile hole, and adjust the verticality and planar position of the lattice column 3; S11. Concrete pouring: After the installation of lattice column 3 is completed, the guide pipe is inserted from the top of lattice column 3 to pour the pile body concrete. After the concrete pouring is completed, the guide pipe and steel casing are pulled out in sequence.

[0027] Furthermore, in step S1, cement blocks are tied around the outer periphery of the reinforcing cage 1, and the cement blocks are filled between the reinforcing cage 1 and the pile hole wall to form a protective layer for the cast-in-place pile after pile formation.

[0028] Furthermore, in step S7, temporary reinforcing bars with a length greater than the diameter of the pile hole are inserted into the reinforcing cage 1, so that the reinforcing cage 1 is temporarily supported on the steel casing; in step S10, before lowering the reinforcing cage 1, a crane is used to lift the reinforcing cage 1 upwards, the temporary reinforcing bars on the steel casing are removed, and then the reinforcing cage 1 is lowered. The temporary reinforcing bars enable the reinforcing cage 1 to be temporarily supported on the steel casing, providing more stable support for the reinforcing cage 1, which facilitates the subsequent bolt connection between the lattice column 3 and the guide groove 2.

[0029] Furthermore, steps S1 to S5 are carried out in the processing plant, while steps S6 to S11 are carried out at the construction site. Prefabricating the guide channel 2 and the reinforcing cage 1 in the processing plant allows for assembly only at the construction site, improving work efficiency and eliminating the need for on-site welding and open flame operations, thus reducing fire hazards.

[0030] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the nature and scope of the present invention. Various modifications made to the above embodiments by those skilled in the art after reading this specification are all within the scope of protection of the present invention.

Claims

1. A prefabricated lattice column positioning and fixing device, characterized in that, It includes a guide groove set inside the reinforcing cage, the internal dimension of the guide groove being larger than the external dimension of the lattice column, the lattice column being fixedly connected inside the guide groove, and a fixing bracket being provided outside the guide groove, the guide groove being fixed inside the reinforcing cage by the fixing bracket.

2. The prefabricated lattice column positioning and fixing device according to claim 1, characterized in that, The guide groove includes four angle steels of the same specification, and the four angle steels are respectively fixed at the four corners of the fixed bracket.

3. The prefabricated lattice column positioning and fixing device according to claim 2, characterized in that, A connecting plate is fixedly connected between two adjacent angle steels.

4. The prefabricated lattice column positioning and fixing device according to claim 1, characterized in that, The fixed support includes four steel bars, which are arranged in a grid pattern.

5. The prefabricated lattice column positioning and fixing device according to claim 1, characterized in that, The guide groove has multiple first bolt holes, and the lattice column has multiple second bolt holes. The first bolt holes and the second bolt holes are arranged in a one-to-one correspondence and bolts are inserted through them.

6. A construction method for a prefabricated lattice column positioning and fixing device, applied to the positioning and fixing device described in any one of claims 1-5, characterized in that, Includes the following steps: S1. Reinforcing cage fabrication: The reinforcing cage for the cast-in-place pile is fabricated on a roll welding machine. The longitudinal main bars are laid out and evenly distributed around the pile. Spiral stirrups are welded to form a complete cage structure. S2. Welding the guide groove into a whole: Select four angle steels according to the size of the lattice column, use auxiliary clamps to position the angle steels in pairs to ensure that the internal size of the guide groove is larger than the external size of the lattice column, and then weld the four angle steels into a rigid integral guide groove structure by connecting plates. S3. Guide groove is sent into the steel cage: The welded guide groove is pushed into the steel cage along the length of the steel cage and positioned. S4. Welding guide groove fixing bracket: Place steel bars at a preset position around the guide groove and weld them into a grid-shaped fixing bracket. Weld the fixing bracket to the outside of the guide groove for fixation. S5. Welding and fixing the guide groove to the reinforcing cage: Use a crane to lift the guide groove and keep it in the center of the reinforcing cage. Then, weld the fixing bracket to the longitudinal main reinforcement of the reinforcing cage. S6. Pile hole construction: Mark the pile hole position on the ground, drive in steel casing, use a rotary drilling rig to excavate the pile hole, clean the hole, and check the hole quality. S7. Reinforcing cage hoisting into pile hole: The welded positioning and fixing device and the reinforcing cage are hoisted into the pile hole as a whole at the construction site, with the reinforcing cage protruding above the ground, ensuring that the first bolt hole on the guide groove is exposed. S8. Installation of lattice column: Lift the lattice column, align its bottom end with the guide groove entrance at the top of the steel cage, and slowly lower it. Under the constraint of the guide groove, the four corners of the lattice column will automatically center and remain vertical until it is lowered to the position corresponding to the first bolt hole. S9. Connection and fixing of lattice column and guide groove: Insert bolts into the corresponding first bolt holes and second bolt holes and tighten them to fix the lattice column and guide groove, so that the steel cage and lattice column form a whole. S10. Overall lowering and adjustment: Use a crane to continue lowering the steel cage to the bottom of the pile hole, and adjust the verticality and planar position of the lattice column; S11. Concrete pouring: After the lattice column is installed, insert the guide pipe from the top of the lattice column and pour the pile body concrete. After the concrete pouring is completed, pull out the guide pipe and steel casing in sequence.

7. The construction method of the prefabricated lattice column positioning and fixing device according to claim 6, characterized in that, In step S1, cement blocks are tied around the outer perimeter of the reinforcing cage, and the cement blocks fill the space between the reinforcing cage and the pile hole wall.

8. The construction method of the prefabricated lattice column positioning and fixing device according to claim 6, characterized in that, In step S7, temporary reinforcing bars with a length greater than the diameter of the pile hole are inserted into the reinforcing cage to temporarily support the reinforcing cage on the steel casing. In step S10, before lowering the reinforcing cage, a crane is used to lift the reinforcing cage upwards, the temporary reinforcing bars on the steel casing are removed, and then the reinforcing cage is lowered.

9. The construction method of the prefabricated lattice column positioning and fixing device according to claim 6, characterized in that, Steps S1 to S5 are carried out in the processing plant, while steps S6 to S11 are carried out at the construction site.

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