A manufacturing process of a steel reinforcement cage with end plates and a production process and precast pile of precast pile

Abstract

The application provides a manufacturing process of a steel reinforcement cage with an end plate, a prefabricated pile production process and a prefabricated pile, and comprises the following steps: manufacturing a steel reinforcement cage; manufacturing an end plate with an anchoring hole; respectively passing the steel bars at two ends of the steel reinforcement cage through the anchoring holes of the corresponding end plates, and making the steel bars at two ends of the steel reinforcement cage extend out of the anchoring holes of the end plates; heading the end portions of the steel bars at two ends of the steel reinforcement cage; and moving the end plates to anchor the heads of the steel bar end portions in the anchoring holes of the end plates. The application firstly installs the end plates on the steel reinforcement cage, and then performs the heading operation on the steel bars at two ends of the steel reinforcement cage, so that the installation is simple and efficient, the labor intensity is low, the requirement for the installation personnel on site is low, the equipment investment is low, the fast installation of the end plate without the over-reinforcement slot and the steel reinforcement cage can be realized, and the economic performance is excellent.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology or the field of prefabricated component preparation, and particularly to a manufacturing process for a steel cage with end plates and a prefabricated pile production process and prefabricated pile. Background Technology

[0002] The increasing importance and height of modern buildings place higher demands on the bearing capacity of the foundation. Natural foundations can no longer adequately support the loads transmitted from the superstructure. Concrete piles are used as foundation piles, driven into the ground by pile drivers to form foundation piles, which then support the building structure. For precast piles with end plates at both ends, the production process mainly includes welding the reinforcing steel cage, hoisting the reinforcing steel cage to the mold, installing the reinforcing steel cage and end plates, concrete placement, tensioning, centrifugal treatment, and curing.

[0003] In the steel reinforcement cage stage, the traditional fabrication and connection process between the steel reinforcement cage and end plates in precast pile production is as follows: a. The end plates and hoops are processed in one place to form hoop plates for precast piles, and then the hoop plates are transferred to the demolding area of ​​precast pile production; b. The steel bars for precast piles are cut and upset in one place, and then the upset steel bars are transferred to another steel reinforcement cage welding area. The upset steel bars are manually threaded into the welding machine's threading plate and welded to the hoops to form a steel reinforcement cage, and then the welded steel reinforcement cage is also transferred to the demolding area of ​​precast pile production; c. Each upset steel bar of the welded steel reinforcement cage is manually threaded into the end plate through the screw hole, and the end plate is rotated to allow the steel bars to pass through the reinforcing groove into the countersunk hole. The upset steel bars are then anchored to the countersunk hole of the end plate, and finally, the tensioning head and tail plates are fixed to the end plate by screwing screws into the screw holes of the end plate for use in the subsequent precast pile production process.

[0004] The traditional precast pile production process, involving the fabrication and connection of the reinforcing cage and end plates, inadvertently wastes a significant amount of labor and has low production efficiency. This method is no longer suitable for end plates without reinforcing bar grooves. With the automation reforms in precast pile production, improving the traditional fabrication and connection processes for the reinforcing cage and end plates, as well as the improvement of the end plates themselves, is an urgent problem to be solved. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a manufacturing process for a steel cage with end plates, a precast pile production process, and a precast pile. The end plate surface does not have a through-reinforcement groove. By first installing the end plate onto the steel cage and then operating the upsetting heads of the steel bars at both ends of the steel cage, the installation is simple and efficient, with low labor intensity, low requirements for on-site installation personnel, low equipment investment, and the ability to quickly install the end plate without through-reinforcement groove to the steel cage, as well as excellent economic performance.

[0006] The present invention achieves the above-mentioned technical objectives through the following technical means.

[0007] A manufacturing process for a steel cage with end plates includes the following steps:

[0008] Fabricate a steel cage without upsetting heads at both ends;

[0009] Fabricate end plates where the anchoring holes and tensioning holes are not interconnected;

[0010] The reinforcing bars at both ends of the steel cage are passed through the anchor holes of the corresponding end plates, and the reinforcing bars at both ends of the steel cage extend out of the anchor holes of the end plates.

[0011] Upsetting the ends of the reinforcing bars at both ends of the reinforcing cage;

[0012] The moving end plate anchors the upset head of the reinforcing bar into the anchoring hole of the end plate.

[0013] Furthermore, the fabrication of the reinforcing cage includes the following steps:

[0014] Several steel bars are passed through the rib plate of the rolling welding machine, and the steel bars are fixed on the traction device by the fixing device on the traction device;

[0015] The circumferential reinforcement is made to wrap around several steel bars by using a roll welding machine.

[0016] Furthermore, the process of using a roll welding machine to make the ring reinforcement surround several steel bars specifically involves:

[0017] Within a set distance L at one end of several reinforcing bars, a rolling welding machine is used to wrap only the ring bars around the several reinforcing bars;

[0018] When the circumferential reinforcement extends beyond a set distance L but does not exceed the set distance L at the other end of several steel bars, the movement of the traction disc causes the steel bars to move as a whole, thereby encircling and welding the circumferential reinforcement onto the steel bars.

[0019] Within a set distance L at the other end of several reinforcing bars, a rolling welding machine is used to wrap only the ring bars around the several reinforcing bars.

[0020] Furthermore, the set distance L is 10 to 70 cm, and the ring reinforcement wraps around several steel bars at least twice within the set distance L.

[0021] Furthermore, it also includes the following steps:

[0022] After the upset head at the end of the reinforcing bar is anchored in the anchor hole of the end plate, the ring bars surrounding the two ends of several reinforcing bars are fixed to several reinforcing bars.

[0023] Furthermore, after passing the reinforcing bars at both ends of the steel cage through the anchoring holes of the corresponding end plates, the pile sleeve hoop is first installed on the end plates, and then the ends of the reinforcing bars at both ends of the steel cage are upset.

[0024] Furthermore, the ends of the reinforcing bars at both ends of the reinforcing cage are upset, specifically as follows:

[0025] The ends of a group of steel bars at one end of the steel cage are simultaneously clamped in the fixture for simultaneous overall upsetting; the ends of a group of steel bars shall include at least one steel bar;

[0026] After upsetting, the steel cage is clamped by a rotating device and rotated by a phase angle to clamp the ends of the next set of steel bars and upset the whole.

[0027] A precast pile manufacturing process includes the following steps:

[0028] Produce the steel cage with end plates according to the manufacturing process described above;

[0029] Install the steel cage with end plates into the precast pile mold;

[0030] Concrete placement and tensioning; product demolding.

[0031] A precast pile, a precast pile produced according to the aforementioned precast pile production process.

[0032] The beneficial effects of this invention are as follows:

[0033] 1. The manufacturing process of the steel cage with end plates described in this invention does not have through-reinforcement grooves on the surface of the end plates. By first installing the end plates on the steel cage and then operating the upsetting heads of the steel bars at both ends of the steel cage, the installation is simple and efficient, with low labor intensity, low requirements for on-site installation personnel, low equipment investment, and the ability to quickly install the end plates without through-reinforcement grooves and the steel cage, as well as excellent economic performance.

[0034] 2. The manufacturing process of the steel cage with end plates described in this invention involves simultaneously clamping the ends of a group of steel bars at one end of the steel cage in a fixture for simultaneous overall upsetting; and using a rotating device to rotate the steel cage to achieve rapid upsetting of multiple steel bars.

[0035] 3. The manufacturing process of the steel cage with end plates described in this invention involves using a roll welding machine to wrap only the ring bars around the steel bars within a set distance L at both ends of several steel bars. This ensures the quality of the pile head during the later stages of end plate installation and steel bar upsetting. After steel bar upsetting, the un-roll-welded ring bars are moved to the ends of the steel bars and tied to the main bars. Attached Figure Description

[0036] 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. The drawings described below are some embodiments of the present invention. For those skilled in the art, it is obvious that other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram illustrating the manufacturing process of the steel cage with end plates described in this invention.

[0038] In the picture:

[0039] 1-End plate; 2-Anchor hole; 3-Reinforcing cage. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited thereto.

[0041] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] The manufacturing process of the steel cage with end plates according to the present invention includes the following steps:

[0045] S01: Construct a steel cage 3 without upsetting heads at both ends, specifically:

[0046] S1.1: Place the packaged coiled finished steel bars in the steel bar unloading tray, release the safety fixing device of the coiled steel bars so that the steel bars can be unloaded freely when the unloading tray rotates;

[0047] S1.2: When the steel bars are cut to the required length, use a cutting device to cut the steel bars so that the length of the steel bars meets the design requirements;

[0048] S1.3: Repeat step S1.2 until the required number of steel bars is obtained;

[0049] S1.4: After the cut steel bars are passed through the steel bar tray of the rolling welding machine in sequence, multiple steel bars are fixed to the traction device by the fixing device on the traction device;

[0050] S1.5: The roll welding machine performs roll welding of the circumferential reinforcement around the reinforcing bar, and the circumferential reinforcement is welded onto the reinforcing bar.

[0051] Wherein: within a set distance L at one end of several steel bars, the ring bars are wrapped around the several steel bars only by a roll welding machine;

[0052] When the circumferential reinforcement extends beyond a set distance L but does not exceed the set distance L at the other end of several steel bars, the movement of the traction disc causes the steel bars to move as a whole, thereby encircling and welding the circumferential reinforcement onto the steel bars.

[0053] Within a set distance L at the other end of several reinforcing bars, a rolling welding machine is used to wrap only the ring bars around the several reinforcing bars.

[0054] Generally, the set distance L is 10 to 70 cm, and the ring reinforcement wraps around several steel bars at least twice within the set distance L.

[0055] S1.6: Disconnect the manufactured steel cage from the traction mechanism, thus completing the manufacture of the steel cage 3 without upsetting heads at both ends.

[0056] S02: Fabricate an end plate in which the anchor hole 2 and the tensioning hole are not interconnected; the end plate body is provided with anchor hole 2 and tensioning screw hole, the anchor hole 2 and tensioning screw hole are integrated or separate, and there is no through groove or other channel between the anchor hole 2 and the tensioning hole to connect the anchor hole 2 and the tensioning hole.

[0057] Step S02 does not mean that the end plate with anchor holes must be made after the steel cage is completed. Step S02 can be made in parallel with step S01, or step S02 can be made before step S01.

[0058] S03: Pass the steel bars at both ends of the steel cage 3 through the anchor holes 2 of the corresponding end plate 1, and make the steel bars at both ends of the steel cage 3 extend out of the anchor holes 2 of the end plate.

[0059] S04: Upsetting the ends of the reinforcing bars at both ends of the reinforcing cage 3. When upsetting the beginning and end of the reinforcing bars, multiple reinforcing bars can be upset simultaneously, or each reinforcing bar can be upset individually. When upsetting multiple reinforcing bars simultaneously, all reinforcing bars are clamped in a fixture, and multiple small hammers are aligned with each reinforcing bar for upsetting. Alternatively, a single large hammer can be used for simultaneous upsetting of the entire reinforcing bar. When upsetting each reinforcing bar individually, the first reinforcing bar is upset first. After upsetting, the reinforcing cage is rotated by a rotating device to allow for upsetting of the next reinforcing bar.

[0060] S05: Move the end plate 1 to anchor the upset head of the steel bar end in the anchor hole 2 of the end plate.

[0061] S06: After the upset head at the end of the reinforcing bar is anchored in the anchoring hole 2 of the end plate, the ring bars surrounding the two ends of several reinforcing bars are fixed to several reinforcing bars.

[0062] Some end plates 1 need to be equipped with pile sleeves. Generally, the steel bars at both ends of the steel cage 3 are first passed through the anchoring holes 2 of the corresponding end plates, and then the pile sleeves are installed on the end plates 1. Then the ends of the steel bars at both ends of the steel cage 3 are upset.

[0063] The precast pile manufacturing process of the present invention includes the following steps:

[0064] S01: The steel cage with end plates 3 is produced according to the manufacturing process of the steel cage with end plates according to the present invention;

[0065] S02: Install the steel cage 3 with end plates into the precast pile mold, and install the head plate and tail plate at both ends of the steel cage with end plates respectively.

[0066] S03: Concrete Placing and Tensioning:

[0067] When using a pumping method for concrete placement, after the upper and lower molds of the precast pile are closed, a tensioning device is used for tensioning. The tail plate and tail end plate are fixed in position, while the head plate and head end plate move relative to the end furthest from the tail plate. After prestressing tensioning is completed, concrete is placed using a pumping method.

[0068] When concrete is placed using a non-pumping method, the concrete material is first placed in the lower mold of the precast pile mold, then the upper mold and lower mold of the precast pile mold are closed, and finally tensioning is performed using a tensioning device. The tail plate and tail end plate are fixed in position, while the head plate and head end plate are moved relative to the end away from the tail plate.

[0069] S04: After centrifuging and curing the precast pile mold containing concrete, demolding is performed to obtain precast component semi-finished or finished products. In this step, a next round of curing can be carried out as needed until the concrete strength meets the design requirements.

[0070] The precast piles described in this invention are precast piles produced using the precast pile production process described in this invention.

[0071] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0072] The detailed descriptions listed above are merely specific illustrations of feasible embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A manufacturing process for a steel cage with end plates, characterized in that, Includes the following steps: The process of fabricating a steel cage (3) without upsetting heads at both ends includes the following steps: Several steel bars are passed through the rib plate of the rolling welding machine, and the steel bars are fixed on the traction device by the fixing device on the traction device; Within a set distance L at one end of several reinforcing bars, a rolling welding machine is used to wrap only the ring bars around the several reinforcing bars; When the circumferential reinforcement extends beyond a set distance L but does not exceed the set distance L at the other end of several steel bars, the movement of the traction disc causes the steel bars to move as a whole, thereby encircling and welding the circumferential reinforcement onto the steel bars. Within a set distance L at the other end of several reinforcing bars, a roll welding machine is used to wrap only the ring bars around the several reinforcing bars; Make an end plate (1) that does not connect the anchor hole (2) and the tension hole. The steel bars at both ends of the steel cage (3) are passed through the anchor holes (2) of the corresponding end plates (1), and the steel bars at both ends of the steel cage (3) extend out of the anchor holes (2) of the end plates. Upsetting the ends of the reinforcing bars at both ends of the reinforcing cage (3); Move the end plate (1) along the axial direction of the steel cage (3) so that the upsetting head of the steel bar end is anchored in the anchoring hole of the end plate.

2. The manufacturing process of the steel cage with end plates according to claim 1, characterized in that, The set distance L is 10~70cm, and the ring reinforcement wraps around several steel bars at least 2 times within the set distance L.

3. The manufacturing process of the steel cage with end plates according to claim 1, characterized in that, It also includes the following steps: After the upset head at the end of the reinforcing bar is anchored in the anchor hole (2) of the end plate, the ring bars surrounding the two ends of the reinforcing bars are fixed to the reinforcing bars.

4. The manufacturing process of the steel cage with end plates according to claim 1, characterized in that, After passing the reinforcing bars at both ends of the steel cage (3) through the anchor holes (2) of the corresponding end plates, first install the pile sleeve hoop on the end plate (1), and then upset the ends of the reinforcing bars at both ends of the steel cage (3).

5. The manufacturing process of the steel cage with end plates according to claim 1, characterized in that, Upsetting the ends of the reinforcing bars at both ends of the reinforcing cage (3) is performed as follows: The ends of a group of steel bars at one end of the steel cage are simultaneously clamped in the fixture for simultaneous overall upsetting; the ends of a group of steel bars shall include at least one steel bar; After upsetting, the steel cage is clamped by a rotating device and rotated by a phase angle to clamp the ends of the next set of steel bars and upset the whole.

6. A precast pile manufacturing process, characterized in that, Includes the following steps: The manufacturing process of the steel cage with end plates according to any one of claims 1-5 produces a steel cage with end plates. Install the steel cage with end plates into the precast pile mold; Concrete placement and tensioning; product demolding.

7. A precast pile, characterized in that, Precast piles produced by the precast pile production process according to claim 6.

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