A non-factory prefabricated cast-in-place pile reinforcement cage installation assembly

Abstract

The utility model discloses a kind of non-factory prefabricated cast-in-place pile reinforcement cage installation components, including bottom reinforcement cage section, multiple intermediate reinforcement cage sections and top reinforcement cage section, to make it sequentially connect from bottom to top to form cast-in-place pile reinforcement cage;The butt joint end of straight bar of every adjacent two reinforcement cage sections is alternately set in long and short, and each straight bar end side on every reinforcement cage section and close to the top side of cast-in-place pile reinforcement cage is equipped with connecting sleeve, to make it be set and fixed in the butt joint end of two straight bars;Positioning ring is equipped on the outer wall of each straight bar on the butt joint end side of every two reinforcement cage sections, to be set and fixed in the butt joint end of two straight bars by observing the position of connecting sleeve relative to the positioning ring of upper and lower two sides;The reinforcement cage installation component can realize the sectional prefabrication of reinforcement cage in construction site, and realize the rapid butt joint, standardization assembly and integrated operation of reinforcement cage in cast-in-place pile site, and transportation cost is low, and improve the structural quality and construction efficiency of reinforcement cage.

Description

Technical Field

[0001] This utility model relates to the field of steel cage processing technology, and in particular to a non-factory prefabricated cast-in-place pile steel cage installation component. Background Technology

[0002] Reinforcing cages are crucial components used in cast-in-place pile engineering for reinforcing concrete structures. As modern architecture evolves towards high-rise buildings, large spans, and complex structures, higher demands are placed on the load-bearing capacity, stability, and durability of concrete structures. Therefore, as a key component for enhancing the mechanical properties of concrete structures, the fabrication and installation technology of reinforcing cages is constantly developing and improving to meet the needs of various complex building structures.

[0003] Currently, in the construction of cast-in-place piles in building engineering, the reinforcing cages are mostly fabricated on-site by binding and welding straight and round bars. This process is not only cumbersome and time-consuming, but the quality of the binding and welding also varies depending on the skill level of the on-site workers, making it difficult to achieve standardization of the final cast-in-place pile reinforcing cages. Furthermore, it lacks the capability for segmented standardized production for easy installation and connection. On the other hand, using prefabricated reinforcing cages in factories presents problems such as excessively large cage sizes, inconvenient transportation, and high transportation costs.

[0004] Therefore, it is necessary to design a set of installation components and supporting processes for cast-in-place pile reinforcing cages that can be prefabricated in sections on the construction site. This would allow for the prefabrication of complete installation components for the cast-in-place pile reinforcing cages on-site, shortening transportation distances and reducing transportation costs. Simultaneously, during the process of lowering the reinforcing cages into the pile hole, the installation components would enable the section-by-section lowering and fixed connection of the reinforcing cages, achieving rapid and standardized installation and connection of the reinforcing cages. This would also meet the length requirements of the reinforcing cages in the engineering design, further improving the structural quality and construction efficiency of the cast-in-place pile reinforcing cages, and ensuring the high strength and high stability of the concrete structure's mechanical properties. Utility Model Content

[0005] The purpose of this utility model is to provide a non-factory prefabricated cast-in-place pile reinforcement cage installation component that solves the above-mentioned technical problems.

[0006] Therefore, the technical solution of this utility model is as follows:

[0007] A non-factory-prefabricated cast-in-place pile reinforcement cage installation assembly includes a bottom reinforcement cage segment, multiple intermediate reinforcement cage segments, and a top reinforcement cage segment, which are sequentially connected from bottom to top to form a cast-in-place pile reinforcement cage. Each reinforcement cage segment includes multiple straight bars evenly distributed along the circumference, and multiple circular bars evenly spaced and fixed to the sidewalls of each straight bar along the axial direction of the straight bars. The ends of the straight bars at the bottom of the bottom reinforcement cage are flush, and the ends of the straight bars at the top are arranged in alternating lengths. The ends of the straight bars at both ends of the intermediate reinforcement cage segments are also arranged in alternating lengths. All are arranged in alternating lengths; the ends of the straight bars at the bottom of the top steel cage section are arranged in alternating lengths, and the ends of the straight bars at the top are flush; a connecting sleeve is fitted on the end of each straight bar on each steel cage section, and on the side of the top of the cast-in-place pile steel cage, so as to fit and fix it to the joint end of the two straight bars; a positioning ring is provided on the outer wall of each straight bar on the side of the joint end of every two steel cage sections, so as to fit and fix the connecting sleeve to the joint end of the two straight bars by observing the position of the connecting sleeve relative to the upper and lower positioning rings.

[0008] Furthermore, the connecting sleeve is an extrusion sleeve, which is fitted and fixed to the joint end of the two straight ribs by cold extrusion.

[0009] Furthermore, the connecting sleeve is a threaded sleeve with internal threads; correspondingly, long external threads are machined on the outer wall of each straight bar end at the top of the bottom reinforcing cage section to form long threads; short external threads and long external threads are machined on the outer wall of each straight bar end at both ends of the middle reinforcing cage section to form short threads and long threads respectively; short external threads are machined on the outer wall of each straight bar end at the bottom of the top reinforcing cage section to form short threads; the internal threads of the connecting sleeve are respectively engaged with the external threads of the long threads and short threads, so that the connecting sleeve can be threadedly connected and fixed to the outside of the long threads and short threads at the joint ends of the two straight bars.

[0010] Furthermore, the length of the short thread is half the length of the connecting sleeve, and the length of the long thread is at least twice the length of the short thread. Each positioning ring is respectively fitted and fixed on the inner end of each long thread and each short thread, so that the connecting sleeve is threaded and fixed on the outside of the long thread and short thread at the joint end of the two straight ribs, and one end abuts against the positioning ring on the inner end of each short thread, the joint end of the two straight ribs is located in the middle of the connecting sleeve.

[0011] Furthermore, the diameter of each steel cage segment is the same as the diameter of the cast-in-place pile steel cage in the construction design, and the length of each steel cage segment satisfies the following: the total length of the bottom steel cage segment, multiple intermediate steel cage segments and the top steel cage segment connected in sequence is consistent with the length of the steel cage in the construction design.

[0012] Furthermore, labels are affixed to the outer wall of the positioning rings on the end sides of any two straight bars on every two butt joint steel cage segments. The labels are marked with numbers describing the installation position and connection sequence of the steel cage segments.

[0013] Compared with existing technologies, this non-factory prefabricated cast-in-place pile reinforcement cage installation assembly is structurally designed to facilitate the segmented prefabrication of the reinforcement cage on-site according to the actual construction design, followed by transportation to the cast-in-place pile construction site, thus achieving integrated assembly and lowering of the reinforcement cage. Compared with the factory-prefabricated reinforcement cage method, the transportation distance is shorter and the transportation cost is lower. At the same time, during the cast-in-place pile construction process, multiple reinforcement cage segments can be quickly connected and fixed by connecting sleeves during the segmented lowering process. The operation is convenient, realizing rapid and standardized assembly of the cast-in-place pile reinforcement cage, effectively improving the structural quality and construction efficiency of the reinforcement cage, and ensuring the high strength and high stability of the concrete structure of the subsequent cast-in-place pile. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the bottom steel cage section of the non-factory prefabricated cast-in-place pile steel cage installation assembly in an embodiment of this utility model.

[0015] Figure 2 This is a schematic diagram of the intermediate steel cage section of the non-factory prefabricated cast-in-place pile steel cage installation assembly in an embodiment of this utility model.

[0016] Figure 3 This is a schematic diagram of the top steel cage section of the non-factory prefabricated cast-in-place pile steel cage installation assembly in an embodiment of this utility model.

[0017] Figure 4 This is an end view of a single straight bar on the steel cage section of the non-factory prefabricated cast-in-place pile steel cage installation assembly in this embodiment of the present invention.

[0018] Figure 5 This is a schematic diagram of the structure of two sets of non-factory prefabricated cast-in-place pile reinforcement cage installation components in this utility model before the long and short wire ends of the single straight bars on the two reinforcement cage sections are connected and fixed by the connecting sleeve.

[0019] Figure 6 This is a schematic diagram of the structure in which the connecting sleeve is first completely fitted onto the long wire head during the docking process between the long and short wire heads of single straight bars on two steel cage sections in two sets of non-factory prefabricated cast-in-place pile steel cage installation components in an embodiment of this utility model.

[0020] Figure 7 This is a schematic diagram of the structure in which the long and short ends of single straight bars on two steel cage sections in two sets of non-factory prefabricated cast-in-place pile steel cage installation components are connected and fixed by a connecting sleeve. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention.

[0022] See Figure 1 and Figure 2 In this embodiment, the non-factory prefabricated cast-in-place pile reinforcement cage installation assembly consists of a bottom reinforcement cage segment, multiple intermediate reinforcement cage segments, and a top reinforcement cage segment, which are connected sequentially from bottom to top to form the cast-in-place pile reinforcement cage.

[0023] Each reinforcing cage segment includes multiple straight reinforcing bars 1 evenly distributed along the circumference, and multiple circular reinforcing bars 2 evenly spaced and fixed to the sidewalls of each straight reinforcing bar 1 along the axial direction. Each reinforcing cage segment is formed by welding and fixing the straight reinforcing bars 1 and the circular reinforcing bars 2 together. The diameter of each reinforcing cage segment is the same as the diameter of the cast-in-place pile reinforcing cage in the construction design. The length of each reinforcing cage segment satisfies the following condition: the total length of multiple reinforcing cage segments connected sequentially is consistent with the length of the reinforcing cage in the construction design. In this embodiment, there are twelve straight reinforcing bars 1, and the spacing between adjacent circular reinforcing bars 2 is 20 cm.

[0024] To meet the construction specifications for concrete structures, each steel cage segment includes multiple straight bars 1 evenly distributed along the circumference, and multiple circular bars 2 equally spaced along the axial direction of the straight bars 1 and fixed to the side wall of each straight bar 1; the ends of the straight bars 1 at the bottom end of the bottom steel cage are flush, and the ends of the straight bars 1 at the top end are arranged in alternating lengths; the ends of the straight bars 1 at both ends of the middle steel cage segment are arranged in alternating lengths; the ends of the straight bars 1 at the bottom end of the top steel cage segment are arranged in alternating lengths, and the ends of the straight bars 1 at the top end are flush.

[0025] A connecting sleeve 6 is fitted on the end of each straight bar 1 on each steel cage segment and near the top side of the cast-in-place pile steel cage so that it is fitted and fixed to the joint end of the corresponding straight bar 1 on the steel cage segment above it.

[0026] In one alternative implementation of this embodiment, the connecting sleeve 6 is a compression sleeve, which is used to fix the connecting sleeve 6 to the outside of the joint end of the two straight ribs 1 by cold compression, so as to achieve a fixed connection between the upper and lower joint straight ribs 1.

[0027] Considering that when the connecting sleeve 6 is fitted on the outside of the two butt-jointed straight bars 1, the position of the butt joint of the two straight bars 1 inside the connecting sleeve 6 is not easy to determine; therefore, a positioning ring 4 is provided on the outer wall of each straight bar 1 on one side of the butt joint of each two steel cage segments, so that the connecting sleeve 6 can be fitted and fixed on the butt joint of the two straight bars 1 by observing the position of the connecting sleeve 6 relative to the upper and lower positioning rings 4.

[0028] Because the reinforcing cage assembly of this cast-in-place pile is designed for non-factory prefabrication, which typically involves on-site processing of reinforcing cages at the construction site, where long reinforcing bars are cut to produce straight bars 1 and round bars 2, which are then fabricated into reinforcing cage segments using a cage rolling machine. However, unlike factory prefabrication, non-factory prefabrication is affected by manual labor, inevitably leading to discrepancies between the lengths of the straight bars at both ends of the prefabricated reinforcing cage segments and the design length. This makes it impossible to guarantee absolute flushness or that the absolute length difference will match the design. Therefore, in this application, the bottom reinforcing cage segment is prefabricated first, and then, while the bottom segment is still on the cage rolling machine, the 12 reinforcing bars used to fabricate the intermediate segment are respectively aligned and positioned with the 12 reinforcing bars at the top of the bottom segment. Next, the bottom steel cage is removed, and the middle steel cage section is prefabricated so that the end faces of the 12 straight bars at the bottom of the middle steel cage section can be connected one by one with the end faces of the 12 straight bars at the top of the bottom steel cage section. Then, in this way, the prefabrication of the top steel cage section is completed. This ensures that the 12 straight bars 1 on the two docking ends of every two steel cage sections are connected in a face-to-face manner, avoiding the phenomenon that two steel bars cannot be docked due to insufficient length due to length error, and ensuring good overall structural strength and continuity of the steel cage.

[0029] Based on the aforementioned on-site prefabrication method, determining the connection sequence between multiple steel cage segments constituting the same cast-in-place pile reinforcement cage is crucial. Therefore, a label 7 is affixed to the outer wall of the positioning ring 6 on the end side of any two connecting straight reinforcing bars 1 on every two connecting steel cage segments. The label 7 is marked with a numerical label 8 describing the installation position and connection sequence of the steel cage segment. This label 7 with the numerical label 8 can identify which cast-in-place pile construction location the steel cage segment belongs to, and its connection sequence during the splicing process of the cast-in-place pile reinforcement cage. Furthermore, since the label 7 is affixed to the two straight reinforcing bars 1 that should be connected, the two steel cage segments can quickly locate the connection point through the label 7 during connection, eliminating the need to attempt connection positions one by one at the ends of the straight reinforcing bars 1 of varying lengths.

[0030] As another optional technical solution in this embodiment, considering that the connecting sleeve 6 is fixed to the outside of the two butt-jointed straight bars 1 by cold extrusion, additional equipment and processes are required; in order to further simplify the connection and fixation of the two butt-jointed straight bars 1, long external threads are processed on the outer wall of each straight bar 1 at the top of the bottom steel cage section to form long thread head 3; short external threads and long external threads are processed on the outer wall of each straight bar 1 at both ends of the middle steel cage section to form short thread head 5 and long thread head 3 respectively; short external threads are processed on the outer wall of each straight bar 1 at the bottom of the top steel cage section to form short thread head 5; correspondingly, the connecting sleeve 6 is a threaded sleeve with internal threads, and its internal threads can cooperate with the external threads of long thread head 3 and short thread head 5, so that the connecting sleeve 6 can be threadedly connected and fixed to the outside of the long thread head 3 and short thread head 5 at the butt-jointed ends of the two straight bars 1.

[0031] In this embodiment, the outer diameters of the long thread end 3 and the short thread end 5 are the same as those of the straight rib 1, and the external thread specifications and directions of the two are also the same. In order to facilitate subsequent docking, installation and positioning, the length of the short thread end 5 is half the length of the connecting sleeve 6, and the length of the long thread end 3 is set to twice the length of the short thread end 5. Each positioning ring 4 is respectively sleeved and fixed on the inner end of each long thread end 3 and each short thread end 5, so that the connecting sleeve 6 is threadedly fixed on the outside of the long thread end 3 and the short thread end 5 at the docking end of the two straight ribs 1, and when one end abuts against the positioning ring 4 on the inner end of each short thread end 5, the docking end of the two straight ribs 1 is located in the middle of the connecting sleeve 6.

[0032] See Figure 4 Labels 7 are affixed to the outer walls of two positioning rings 4 on the sides of any two straight reinforcing bars 1 on every two rebar cage segments. The labels 7 are marked with numbers 8 describing the installation position and connection sequence of the rebar cage segment. For example, if the number 8 printed on the outer side of the label 7 on the positioning ring 4 of the rebar cage segment is "1-3", it means that the rebar cage segment corresponds to the rebar cage at the construction position of the first cast-in-place pile, and in the specific construction of the lowering of the rebar cage, this rebar cage segment is the third rebar cage segment lowered into the pile hole.

[0033] See Figures 1-7 The specific operation process of assembling and lowering the cast-in-place pile reinforcement cage in an integrated manner on the work site using a factory-prefabricated cast-in-place pile reinforcement cage assembly in one of the optional technical solutions of this embodiment is described as follows.

[0034] S1. According to the construction design requirements of the cast-in-place pile, the processing of each section of the cast-in-place pile steel cage is completed at the steel cage processing site on the construction site, and the connecting sleeve 6 is fitted on the long thread end 3 of each steel cage section; the connecting sleeve 6 is initially fully fitted and threaded onto each long thread end 3, and the connecting sleeve 6 is rotated into place by pressing the bottom end of the connecting sleeve 6 against the positioning ring 4.

[0035] S2. After the pile hole for the cast-in-place pile is dug and reinforced, the steel cage sections that were lowered into the pile hole are transported to the adjacent side of the pile hole. Then, the connection and lowering of the steel cage for the cast-in-place pile can be carried out. The specific operation steps are as follows:

[0036] 1) Based on the label 7 and number 8 on each steel cage segment, arrange multiple steel cage segments that form the same cast-in-place pile steel cage according to the order of placement;

[0037] 2) The first steel cage section is vertically lifted into the pile hole with the long wire end 3 facing upwards, and temporarily fixed at the hole opening;

[0038] 3) Lift the second steel cage section to directly above the first steel cage section; the workers fine-tune the rotation angle of the second steel cage section and continue to lower it so that the straight bars 1 with label 7 on the second steel cage section are connected with the straight bars with label 7 on the first steel cage section. Quickly complete the connection of the 12 straight bars 1 at the bottom of the second steel cage section with the 12 straight bars 1 at the top of the first steel cage section one by one with their end faces aligned.

[0039] 4) The operator rotates each connecting sleeve 6 upwards in sequence until the top of the connecting sleeve 6 abuts against the positioning ring 4 on one side of the short thread head 5, thereby fixing the connecting sleeve 6 to the joint end of each of the upper and lower straight ribs 1 by means of threaded connection, and the joint end is just located in the middle of the connecting sleeve 6.

[0040] 5) Continue to lower the second steel cage segment and temporarily fix its top side at the borehole opening; repeat steps 3) and 4) above to complete the connection and fixing of the next steel cage segment; and so on, until the splicing operation of the entire cast-in-place pile steel cage is completed.

[0041] S3. Once the reinforcing cage for the cast-in-place pile is lowered into place, the subsequent cast-in-place pile pouring construction process can be completed.

[0042] It should be noted that the parts of this utility model not disclosed in detail belong to the well-known technology in this field; in addition, although the illustrative specific embodiments of this utility model have been described above to facilitate understanding of this utility model by those skilled in the art, it should be clear that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious, and all utility model creations utilizing the concept of this utility model are subject to protection.

Claims

1. A non-factory-prefabricated cast-in-place pile reinforcement cage installation assembly, characterized in that, The structure includes a bottom reinforcement cage segment, multiple intermediate reinforcement cage segments, and a top reinforcement cage segment, which are connected sequentially from bottom to top to form a cast-in-place pile reinforcement cage. Each reinforcement cage segment includes multiple straight bars (1) evenly distributed along the circumference, and multiple round bars (2) evenly spaced along the axial direction of the straight bars (1) and fixed to the side walls of each straight bar (1). The ends of the straight bars (1) at the bottom of the bottom reinforcement cage are flush, and the ends of the straight bars (1) at the top are arranged in alternating lengths. The ends of the straight bars (1) at both ends of the intermediate reinforcement cage segments are arranged in alternating lengths. The bottom of the top reinforcement cage segment... The ends of the straight bars (1) at the ends are arranged in alternating lengths, and the ends of the straight bars (1) at the top are flush. A connecting sleeve (6) is provided on the end of each straight bar (1) on each steel cage section and on the side of the top of the cast-in-place pile steel cage so that it can be fitted and fixed to the joint end of the two straight bars (1). A positioning ring (4) is provided on the outer wall of each straight bar (1) on the side of the joint end of each two steel cage sections so that the connecting sleeve (6) can be fitted and fixed to the joint end of the two straight bars (1) by observing the position of the connecting sleeve (6) relative to the upper and lower positioning rings (4).

2. The non-factory prefabricated cast-in-place pile reinforcement cage installation assembly according to claim 1, characterized in that, The connecting sleeve (6) is a compression sleeve, which is fitted and fixed to the joint end of the two straight ribs (1) by cold compression.

3. The non-factory prefabricated cast-in-place pile reinforcement cage installation assembly according to claim 1, characterized in that, The connecting sleeve (6) is a threaded sleeve with internal threads; correspondingly, long external threads are machined on the outer wall of each straight bar (1) at the top of the bottom steel cage section to form long thread ends (3); short external threads and long external threads are machined on the outer wall of each straight bar (1) at both ends of the middle steel cage section to form short thread ends (5) and long thread ends (3) respectively; short external threads are machined on the outer wall of each straight bar (1) at the bottom of the top steel cage section to form short thread ends (5); the internal threads of the connecting sleeve (6) are respectively matched with the external threads of the long thread ends (3) and short thread ends (5) so that the connecting sleeve (6) can be threadedly connected and fixed to the outside of the long thread ends (3) and short thread ends (5) at the joint ends of the two straight bars (1).

4. The non-factory prefabricated cast-in-place pile reinforcement cage installation assembly according to claim 3, characterized in that, The length of the short thread (5) is half the length of the connecting sleeve (6), and the length of the long thread (3) is at least twice the length of the short thread (5). Each positioning ring (4) is respectively fitted and fixed on the inner end of each long thread (3) and each short thread (5), so that the connecting sleeve (6) is threaded and fixed on the outside of the long thread (3) and the short thread (5) at the joint end of the two straight ribs (1), and one end abuts on the positioning ring (4) at the inner end of each short thread (5), the joint end of the two straight ribs (1) is located in the middle of the connecting sleeve (6).

5. The non-factory prefabricated cast-in-place pile reinforcement cage installation assembly according to claim 1, characterized in that, The diameter of each steel cage segment is the same as the diameter of the cast-in-place pile steel cage in the construction design, and the length of each steel cage segment satisfies the following condition: the total length of the bottom steel cage segment, multiple intermediate steel cage segments and the top steel cage segment connected in sequence is consistent with the length of the steel cage in the construction design.

6. The non-factory prefabricated cast-in-place pile reinforcement cage installation assembly according to claim 1, characterized in that, Labels (7) are affixed to the outer wall of the end positioning rings (4) of any two straight bars (1) on each pair of rebar cage segments. The labels (7) are marked with numbers (8) describing the installation position and connection sequence of the rebar cage segments.

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