Reinforcement cage butt joint method

Abstract

The invention provides a reinforcement cage butt joint method which comprises the following steps that an upper reinforcement cage and a lower reinforcement cage are prepared, the upper reinforcement cage is provided with first vertical ribs, and the lower reinforcement cage is provided with second vertical ribs; a limiting clamp is provided and comprises an upper hoop assembly, a lower hoop assembly and a limiting rod, the upper hoop assembly is connected with the first vertical rib, the lower hoop assembly is connected with the second vertical rib, the lower hoop assembly is provided with a guide pin, one end of the limiting rod is connected with the upper hoop assembly, a sliding groove is formed in the other end of the limiting rod, and the guide pin is sleeved with the sliding groove; a sleeve is provided, and the two ends of the sleeve are in threaded connection with the first vertical rib and the second vertical rib correspondingly; torque is applied to the sleeve, so that the distance between the first vertical rib and the second vertical rib is gradually reduced, and the first vertical rib and the second vertical rib abut against each other; and dismounting the limiting clamp. By the adoption of the technical scheme, the screwing lengths of the thread pairs between the sleeve and the first vertical ribs and between the sleeve and the second vertical ribs are increased at the same time, the first vertical ribs and the second vertical ribs can be in synchronous and accurate butt joint at the same time, and the butt joint precision of the reinforcement cage is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of construction engineering, and particularly relates to a method for butt - jointing steel reinforcement cages. Background Technique

[0002] Steel reinforcement cages are widely used in the construction of various engineering pile foundations. Generally, steel reinforcement cages are fabricated centrally in a steel bar processing yard. Limited by the length of steel bar materials, transportation, and processing, the steel reinforcement cages need to be fabricated in sections and then assembled on - site. To meet the stress requirements, the butt - joint construction of two sections of steel reinforcement cages is generally carried out by corresponding mechanical sleeves for connection one by one.

[0003] For example, the patent document with the authorization announcement number: "CN114908752B" discloses a positioning and fixing device for assisting the rapid butt - joint of steel reinforcement cages. Through an upper clamping block, a lower clamping block, and a buckling and locking member, the guide sleeve can form a buckling state and a locking state. In the buckling state, the formed upper guide cavity can allow the connecting end of the upper steel reinforcement cage to extend in, and be quickly positioned into the accommodating cavity, enabling the hoisted upper steel reinforcement cage to be quickly guided to correspond one by one with the connecting end of the lower steel reinforcement cage, making the entire alignment process more efficient and fast. And after alignment, through the buckling and locking member changing to the locking state, the clamped connecting ends are clamped, and the upper and lower steel reinforcement cages can be quickly butt - jointed and fixed, greatly improving the efficiency, and reducing the occupation time of the crane or hoisting device during the butt - joint process. However, due to the large ratio of the length to the diameter of the steel bars, steel reinforcement cages are generally fabricated centrally in a steel bar site. When transferring the steel reinforcement cages to their application sites, the steel reinforcement cages are prone to collide with other objects in the construction site, resulting in the bending or deformation of the steel bars, affecting the butt - joint accuracy of the steel reinforcement cages. In addition, when the steel reinforcement cages are butt - jointed, the corresponding two steel bars need to be welded together, and the thermal stress generated during welding will also cause the steel bars to deform, thereby affecting the butt - joint accuracy of the steel reinforcement cages. Moreover, when the steel reinforcement cages are butt - jointed, the lengths of each steel bar are different, and the relative positions of the corresponding steel bars are uneven, resulting in poor consistency at the joints of each steel bar. Summary of the Invention

[0004] To solve the above - mentioned technical problems, the present invention provides a method for butt - jointing steel reinforcement cages.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a method for butt - jointing steel reinforcement cages, including the following steps:

[0007] Step 1: Prepare an upper steel reinforcement cage and a lower steel reinforcement cage. The upper steel reinforcement cage includes a plurality of first vertical steel bars, and the lower steel reinforcement cage includes a plurality of second vertical steel bars;

[0008] Step 2: Provide and install a limiting fixture, the limiting fixture including an upper hoop assembly, a lower hoop assembly and a limiting rod. The upper hoop assembly is composed of a pair of upper hugging hoops superposed, and the first vertical rib is clamped between the pair of upper hugging hoops. The lower hoop assembly is composed of a pair of lower hugging hoops superposed, and the second vertical rib is clamped between the pair of lower hugging hoops. An upper convex platform is provided on the surface of the upper hugging hoop, a lower convex platform is provided on the surface of the lower hugging hoop, and the lower convex platform is also fixedly connected to a guide pin. One end of the limiting rod is hinged to the upper convex platform, a chute is provided at the other end of the limiting rod, and the guide pin is sleeved in the chute;

[0009] Step 3: Provide a sleeve, connect one end of the sleeve to the first vertical rib through a left-handed thread pair, and connect the other end of the sleeve to the second vertical rib through a right-handed thread pair;

[0010] Step 4: Apply a torque to the sleeve to simultaneously increase the screwing length of the thread pairs between the sleeve and the first vertical rib and between the sleeve and the second vertical rib, gradually reduce the distance between the first vertical rib and the second vertical rib, and make the guide pin slide along the length direction of the chute. Stop when the first vertical rib abuts against the second vertical rib;

[0011] Step 5: Remove the limiting fixture.

[0012] The limiting fixture further includes a strip hoop, a clamping groove is provided on the surface of the strip hoop, and the left and right sides of the upper hoop assembly and the lower hoop assembly are respectively sleeved in the clamping groove.

[0013] The cross-section of the clamping groove is rectangular.

[0014] The cross-section of the guide pin is rectangular.

[0015] The method for butt-jointing the steel reinforcement cage further includes the following steps: After completing Step 1, complete the following steps: Provide a reinforcing bar protecting ring, a plurality of limiting holes are provided on the surface of the reinforcing bar protecting ring, and the ends of all the first vertical ribs and the ends of all the second vertical ribs are sleeved in the limiting holes. Before performing Step 2, remove the reinforcing bar protecting ring.

[0016] A protecting wire nut is also sleeved in the limiting hole. When the ends of all the first vertical ribs and the ends of all the second vertical ribs are sleeved in the limiting hole, the protecting wire nut is screwed to the first vertical rib and the second vertical rib.

[0017] The number of the limiting holes is equal to the number of the first vertical ribs and the number of the second vertical ribs, and all the limiting holes are uniformly distributed on the surface of the reinforcing bar protecting ring in a circumferential array with the central axis of the reinforcing bar protecting ring as the rotation center.

[0018] In Step 2, the upper convex platforms are provided in pairs on the surface of the upper hugging hoop. In Step 3, the limiting rod is hinged between each pair of upper convex platforms.

[0019] The upper hoop or the lower hoop is semi-circular.

[0020] The method for butt-jointing the steel reinforcement cages further includes the following steps: placing the lower steel reinforcement cage on the ground first, then suspending the upper steel reinforcement cage above the lower steel reinforcement cage, adjusting the posture of the upper steel reinforcement cage so that the first vertical bars and the second vertical bars are in one-to-one correspondence along the vertical direction, and then proceeding to step two.

[0021] The beneficial effects of the present invention are as follows: adopting the technical solution of the present invention, placing the lower steel reinforcement cage on the ground first, then suspending the upper steel reinforcement cage above the lower steel reinforcement cage, adjusting the posture of the upper steel reinforcement cage so that the first vertical bars and the second vertical bars are in one-to-one correspondence along the vertical direction, pre-positioning the first vertical bars and the second vertical bars, then pre-connecting the sleeves with the first vertical bars and the second vertical bars. When a torque is applied to the sleeves, the screwing lengths of the thread pairs between the sleeves and the first vertical bars and between the sleeves and the second vertical bars increase simultaneously, and the distance between the first vertical bars and the second vertical bars gradually decreases, enabling the multiple first vertical bars and the multiple second vertical bars to be accurately butted synchronously and simultaneously, preventing misalignment during the butt-jointing of the first vertical bars and the second vertical bars, and improving the butt-jointing accuracy of the steel reinforcement cages. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the front view of the present invention;

[0023] Figure 2 is the top view of the present invention;

[0024] Figure 3 is the front view of the steel bar protection ring of the present invention.

[0025] In the figures: 1 - first vertical bar, 2 - second vertical bar, 3 - limit fixture, 4 - limit rod, 5 - upper hoop, 6 - lower hoop, 7 - upper boss, 8 - lower boss, 9 - guide pin, 10 - chute, 11 - sleeve, 12 - strip hoop, 13 - clamping groove, 14 - steel bar protection ring, 15 - limit hole, 16 - thread protection nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The technical solution of the present invention will be further described below, but the scope of protection claimed is not limited thereto.

[0027] As Figures 1 to 3 shown, the present invention provides a method for butt-jointing steel reinforcement cages, including the following steps:

[0028] Step one: Prepare the upper steel reinforcement cage and the lower steel reinforcement cage. The upper steel reinforcement cage includes several first vertical bars 1, and the lower steel reinforcement cage includes several second vertical bars 2;

[0029] Step 2: Provide and install the limit fixture 3. The limit fixture 3 includes an upper hoop assembly, a lower hoop assembly, and a limit rod 4. The upper hoop assembly is composed of a pair of upper clamps 5 stacked together, and the first vertical rib 1 is clamped between the pair of upper clamps 5. The lower hoop assembly is composed of a pair of lower clamps 6 stacked together, and the second vertical rib 2 is clamped between the pair of lower clamps 6. The surface of the upper clamp 5 is provided with an upper boss 7, and the surface of the lower clamp 6 is provided with a lower boss 8. The lower boss 8 is also fixedly connected to a guide pin 9. One end of the limit rod 4 is hinged to the upper boss 7, and the other end of the limit rod 4 is provided with a chute 10. The guide pin 9 is sleeved in the chute 10;

[0030] Step 3: Provide a sleeve 11, and connect one end of the sleeve 11 to the first vertical rib 1 through a left-handed thread pair, and connect the other end of the sleeve 11 to the second vertical rib 2 through a right-handed thread pair;

[0031] Step 4: Apply a torque to the sleeve 11, so that the screwed engagement lengths between the sleeve 11 and the first vertical rib 1, and between the sleeve 11 and the second vertical rib 2 increase simultaneously, the distance between the first vertical rib 1 and the second vertical rib 2 gradually decreases, and make the guide pin 9 slide along the length direction of the chute 10. Stop when the first vertical rib 1 abuts against the second vertical rib 2;

[0032] Step 5: Remove the limit fixture 3.

[0033] Adopting the technical solution of the present invention, first place the lower steel cage on the ground, then suspend the upper steel cage above the lower steel cage, adjust the posture of the upper steel cage to make the first vertical ribs and the second vertical ribs correspond to each other along the vertical direction one by one, complete the pre-positioning of the first vertical ribs and the second vertical ribs, and then pre-connect the sleeve to the first vertical rib and the second vertical rib. When a torque is applied to the sleeve, the screwed engagement lengths between the sleeve and the first vertical rib, and between the sleeve and the second vertical rib increase simultaneously, the distance between the first vertical rib and the second vertical rib gradually decreases, enabling multiple first vertical ribs and multiple second vertical ribs to be accurately butted synchronously and simultaneously, preventing misalignment during the butting of the first vertical rib and the second vertical rib, and improving the butting accuracy of the steel cage.

[0034] Specifically, the limit fixture further includes a strip hoop 12. The surface of the strip hoop 12 is provided with a clamping groove 13. The left and right sides of the upper hoop assembly and the lower hoop assembly are respectively sleeved in the clamping groove 13. Preferably, the cross-section of the clamping groove 13 is rectangular. The strip hoop 12 has slight elasticity, enabling the upper hoop assembly and the lower hoop assembly to be quickly clamped on the first vertical rib and the second vertical rib, which is beneficial to improving the assembly efficiency of the limit fixture.

[0035] In addition, the cross-section of the guide pin 9 is rectangular. The chute 10 is preferably an oval blind groove. Due to the limiting or guiding effect of the limit fixture, during the process of the first vertical rib and the second vertical rib approaching and butting, the first vertical rib and the second vertical rib always approach each other along the vertical direction, so that the butting of the first vertical rib and the second vertical rib is accurate.

[0036] In addition, the method for butt-jointing the steel reinforcement cage further includes the following steps: After completing Step 1, the following steps are completed: Provide a reinforcing ring 14, on the surface of which there are a number of limiting holes 15, and the ends of all the first vertical bars 1 and the ends of all the second vertical bars 2 are sleeved in the limiting holes 15. Before performing Step 2, the reinforcing ring 14 is removed. By adopting the technical solution of the present invention, through the protection of the reinforcing ring 14, it is avoided that the first vertical bars and the second vertical bars are damaged by collision with external objects and deformed during the transfer process of the upper steel reinforcement cage and the lower steel reinforcement cage in the construction site, laying a foundation for the accurate butt-jointing of the first vertical bars and the second vertical bars.

[0037] Specifically, a protecting wire nut 16 is also sleeved in the limiting hole 15. When the ends of all the first vertical bars 1 and the ends of all the second vertical bars 2 are sleeved in the limiting hole 15, the protecting wire nut 16 is screwed with the first vertical bars 1 and the second vertical bars 2. By adopting the technical solution of the present invention, the protecting wire nut 16 is preferably a round nut. The protecting wire nut 16 is sleeved in the limiting hole 15 and can also rotate around its own axis. When the protecting wire nut 16 is screwed with the first vertical bars 1 and the second vertical bars 2, the protecting wire nut 16 is used to protect the threads on the surfaces of the first vertical bars 1 and the second vertical bars 2, avoiding sundries from filling the thread surfaces, laying a foundation for the accurate butt-jointing of the first vertical bars 1 and the second vertical bars 2.

[0038] In addition, the number of the limiting holes 15 is equal to the number of the first vertical bars 1 and the number of the second vertical bars 2, and all the limiting holes 15 are uniformly distributed on the surface of the reinforcing ring 14 in a circumferential array with the central axis of the reinforcing ring 14 as the rotation center. In Step 2, the upper bosses 7 are arranged in pairs on the surface of the upper hoop 5. In Step 3, the limiting rods 4 are hinged between each pair of upper bosses 7. The upper hoop 5 or the lower hoop 6 is integrally semi-circular.

[0039] In addition, the method for butt-jointing the steel reinforcement cage further includes the following steps: First, place the lower steel reinforcement cage on the ground, then suspend the upper steel reinforcement cage above the lower steel reinforcement cage, adjust the posture of the upper steel reinforcement cage so that the first vertical bars 1 and the second vertical bars 2 are in one-to-one correspondence along the vertical direction, and then perform Step 2.

Claims

1. A method for butt-jointing steel reinforcement cages, characterized in that: It includes the following steps: Step 1: Prepare the upper steel reinforcement cage and the lower steel reinforcement cage. The upper steel reinforcement cage includes several first vertical reinforcing bars (1), and the lower steel reinforcement cage includes several second vertical reinforcing bars (2); Step 2: Provide and install a limit fixture (3). The limit fixture (3) includes an upper hoop assembly, a lower hoop assembly and a limit rod (4). The upper hoop assembly is composed of a pair of upper hoop clamps (5) stacked together, and the first vertical reinforcing bar (1) is clamped between the pair of upper hoop clamps (5). The lower hoop assembly is composed of a pair of lower hoop clamps (6) stacked together, and the second vertical reinforcing bar (2) is clamped between the pair of lower hoop clamps (6). The surface of the upper hoop clamp (5) is provided with an upper boss (7), and the surface of the lower hoop clamp (6) is provided with a lower boss (8). The lower boss (8) is also fixedly connected to a guide pin (9). One end of the limit rod (4) is hinged to the upper boss (7), and the other end of the limit rod (4) is provided with a chute (10). The guide pin (9) is sleeved in the chute (10); Step 3: Provide a sleeve (11), and connect one end of the sleeve (11) to the first vertical reinforcing bar (1) through a left-handed thread pair, and connect the other end of the sleeve (11) to the second vertical reinforcing bar (2) through a right-handed thread pair; Step 4: Apply a torque to the sleeve (11) to simultaneously increase the screwed length between the sleeve (11) and the first vertical reinforcing bar (1) and between the sleeve (11) and the second vertical reinforcing bar (2). The distance between the first vertical reinforcing bar (1) and the second vertical reinforcing bar (2) gradually decreases, and make the guide pin (9) slide along the length direction of the chute (10). Stop when the first vertical reinforcing bar (1) abuts against the second vertical reinforcing bar (2); Step 5: Remove the limit fixture (3).

2. The method for butt - jointing a steel reinforcement cage according to claim 1, characterized in that: The limit fixture further includes a strip hoop (12). The surface of the strip hoop (12) is provided with a card slot (13). The left and right sides of the upper hoop assembly and the lower hoop assembly are respectively sleeved in the card slot (13).

3. The method for butt - jointing a steel reinforcement cage according to claim 2, characterized in that: The cross-section of the card slot (13) is rectangular.

4. The method for butt - jointing a steel reinforcement cage according to claim 1, wherein: The cross-section of the guide pin (9) is rectangular.

5. The method for butt - jointing a steel reinforcement cage according to claim 1, wherein: The method for butt-jointing the steel reinforcement cages further includes the following steps: After completing Step 1, complete the following steps: Provide a reinforcement ring (14). The surface of the reinforcement ring (14) is provided with several limit holes (15). Make the ends of all the first vertical reinforcing bars (1) and the ends of all the second vertical reinforcing bars (2) be sleeved in the limit holes (15). Before performing Step 2, remove the reinforcement ring (14).

6. The method for butt-jointing a steel reinforcement cage according to claim 5, characterized in that: A protection wire nut (16) is also sleeved in the limit hole (15). When the ends of all the first vertical reinforcing bars (1) and the ends of all the second vertical reinforcing bars (2) are sleeved in the limit holes (15), the protection wire nut (16) is screwed to the first vertical reinforcing bar (1) and the second vertical reinforcing bar (2).

7. The method for butt-jointing a steel reinforcement cage according to claim 5, characterized in that: The number of the limit holes (15) is equal to the number of the first vertical reinforcing bars (1) and the number of the second vertical reinforcing bars (2), and all the limit holes (15) are evenly distributed on the surface of the reinforcement ring (14) in a circumferential array with the central axis of the reinforcement ring (14) as the rotation center.

8. The method for butt - jointing a steel reinforcement cage according to claim 1, characterized in that: In step two, the upper convex platforms (7) are arranged in pairs on the surface of the upper hoop (5). In step three, the limiting rods (4) are hinged between each pair of upper convex platforms (7).

9. The method for butt-jointing a steel reinforcement cage according to claim 1, characterized in that: The upper hoop (5) or the lower hoop (6) is semi-circular.

10. The method for butt - jointing a steel reinforcement cage according to claim 1, characterized in that: The method for butt-jointing the steel reinforcement cages further includes the following steps: First, place the lower steel reinforcement cage on the ground, then suspend the upper steel reinforcement cage above the lower steel reinforcement cage, adjust the posture of the upper steel reinforcement cage so that the first vertical bars (1) and the second vertical bars (2) are in one-to-one correspondence along the vertical direction, and then proceed to step two.

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