Reinforcement cage righting device and righting method

Abstract

The invention discloses a reinforcement cage righting device and righting method, and belongs to the technical field of building construction equipment. The device comprises a bottom supporting assembly and an adjusting assembly. The bottom supporting assembly comprises an adjusting bottom plate and leveling supporting assemblies, the adjusting bottom plate is composed of a plurality of bottom plate units which can be spliced in a sliding mode, a hole channel allowing a reinforcement cage to pass through is formed after splicing, and the leveling supporting assemblies are arranged on the bottom plate units to adjust the height and the levelness. The adjusting assembly comprises a plurality of supporting base plates arranged around the hole channel, each supporting base plate is provided with at least one limiting assembly, and each limiting assembly comprises a driving piece and an extruding piece which stretch and retract in the radial direction. The device adopts an external embracing type design, thoroughly avoids interference with the internal structure of the reinforcement cage, and is suitable for the square reinforcement cage. The adjusting bottom plate which is spliced in a block sliding mode is combined with an inserting connection structure with scales, and rapid and visual centering of the device and the center of a pile hole is achieved. And in cooperation with the leveling supporting assembly, stable supporting and accurate leveling are achieved, and a reliable datum plane is provided for follow-up righting.

Description

Technical Field

[0001] This invention relates to the field of construction equipment technology, specifically to a rebar cage straightening device and straightening method. Background Technology

[0002] In building foundation construction, especially in large-scale anti-slide pile projects, the installation quality of the reinforcing cage directly affects the bearing capacity of the pile foundation and the stability of the overall structure. These piles are large in size (e.g., 2.0m × 3.0m or larger) and deep (often exceeding 30 meters), resulting in a significant self-weight of the reinforcing cage. Traditional construction methods often involve tying the reinforcing cage in sections at the borehole opening and then lowering it into the pile hole segment by segment. During this process, the verticality, center position deviation, and stability of the reinforcing cage directly affect the pile formation quality and construction safety.

[0003] To address this issue, several rebar cage straightening devices have been used in rebar cage construction. For example, utility model patent application CN202322318963.3, entitled "A Rebar Cage Straightening Device for Resettlement Housing Foundation Construction," discloses a rebar cage straightening device comprising a connecting cylinder, four radially arranged support plates, and a fixing plate with springs and threaded rods. This device positions the rebar cage by positioning the connecting cylinder at the center of the pile hole and using the threaded rods to drive the clamping plate. However, implementation has revealed the following significant limitations when applied to large-scale, deep-hole anti-slide pile projects:

[0004] Firstly, the positioning and leveling accuracy is low, making it difficult to establish a reliable benchmark: Relying on a single central rod for positioning, its accuracy is greatly affected by the flatness of the ground. In complex borehole sites with deep and large pile holes, it is difficult to quickly and accurately level the device and align it precisely with the center of the pile hole, resulting in errors in the alignment benchmark itself.

[0005] Secondly, the straightening method is passive and crude, lacking precise control: it adopts manual mechanical adjustment, which cannot quantify and control the clamping force at each point, and is prone to local over-tightening (damaging the steel bars) or over-loosening (ineffective straightening). For large steel cages, it is difficult to ensure that the overall uniform force and precise centering are achieved, and it is difficult to achieve rapid and precise repeated straightening during the segmented lowering process.

[0006] Thirdly, it has poor adaptability: the integrated connecting cylinder and radial support structure has limited support stiffness, making it difficult to effectively resist deformation caused by the self-weight of large steel cages. Furthermore, applying force radially outward from the center for straightening is difficult to adapt to square steel cages with reinforcing bars in the middle. In addition, its integral structure presents difficulties in manufacturing, transportation, and on-site hoisting and positioning when dealing with ultra-large pile holes.

[0007] Therefore, for the specific scenario of segmented lowering and installation of large (especially square cross-section) anti-slide pile reinforcement cages in deep holes, existing technologies lack a dedicated device and method capable of rapid and high-precision self-positioning and leveling, actively and controllably applying uniform force to the reinforcement cage in a closed-loop straightening process, and efficiently coordinating with the segmented lowering process. This leads to problems such as difficulty in ensuring construction accuracy, low efficiency, and high safety risks. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art by providing a rebar cage straightening device and method to achieve a high-efficiency and high-precision continuous straightening operation that can be safely carried out on the ground.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a reinforcing cage straightening device, comprising a bottom support assembly for supporting the pile hole opening and an adjustment assembly for applying a straightening effect to the reinforcing cage from the outside; the bottom support assembly includes an adjustment base plate and a leveling support assembly; the adjustment base plate has a channel for the reinforcing cage to pass through at its center, and the adjustment base plate is slidably spliced ​​together from several base plate units, which form the channel after being spliced ​​together; at the splicing point of two adjacent base plate units, there are interlocking blocks and interlocking slots that slide and insert into each other, and the interlocking blocks are located on the periphery of the base plate unit; each base plate unit is respectively equipped with one of the above-mentioned components. A leveling support assembly is used to adjust and fix the height and levelness of the base plate unit relative to the ground. The adjustment assembly includes multiple support base plates and multiple limiting components. The multiple support base plates are evenly installed on the top of the adjusting base plate around the center of the channel. Each support base plate is provided with at least one limiting component along its height direction. The limiting component includes a radially telescopic drive member and an extrusion member connected to the output end of the drive member. All the extrusion members are radially telescopic in a controlled manner under the drive member, forming an adjustable straightening space that straightens and positions the reinforcing cage passing through the channel at the center of the pile hole.

[0010] Furthermore, the limiting component also includes a pressure sensor disposed between the output end of the drive member and the extrusion member.

[0011] Furthermore, a support plate is installed at the output end of the drive component, and the pressure sensor is located between the support plate and the extrusion component, and the pressure sensor is fixed to the support plate.

[0012] Furthermore, the extruded component is flat.

[0013] Furthermore, the leveling support assembly includes an mounting cylinder, a drive rod, and a second piston; the mounting cylinder is threadedly connected to the base plate unit; a cylinder is integrally formed at the bottom end of the mounting cylinder; a sliding rod is movably inserted into the cylinder, and a first piston is fixedly connected to the top end of the sliding rod. The first piston is in a sealed sliding fit with the cylinder, and the bottom end of the sliding rod extends out of the cylinder and is connected to an anchor for anchoring to the ground surface; the drive rod is rotatably disposed at the top of the mounting cylinder, and its bottom end extends into the cylinder and is drively connected to the second piston, which is in a sealed sliding fit within the cylinder; the cavity formed by the second piston, the first piston, and the cylinder is filled with hydraulic medium.

[0014] Furthermore, the leveling support assembly also includes a support spring sleeved on the sliding rod, with both ends of the support spring abutting against the first piston and the inner bottom wall of the cylinder, respectively.

[0015] Furthermore, conical shell units are respectively provided at the bottom of each of the base plate units, and all the conical shell units surround and form a conical shell that gradually narrows from top to bottom.

[0016] Furthermore, the bottom end of the conical shell unit is integrally formed with a threaded shell unit with internal threads; all the threaded shell units surround to form an internally threaded cylinder; the externally threaded cylinder, which is threaded with the internally threaded cylinder, locks the relative positions of the multiple base plate units after splicing.

[0017] The method for straightening a steel cage using the aforementioned device includes the following steps:

[0018] S1: Device positioning and leveling: Slide and splice each base plate unit of the base support assembly above the pile hole. According to the scale markings on the plug block, adjust the relative position of each base plate unit so that the hole formed after splicing is aligned with the pile hole and locked. Then, operate each leveling support assembly to anchor to the ground surface, and adjust the driving amount of each leveling support assembly to make the entire adjusting base plate level.

[0019] S2: Install the adjustment assembly: Install each support base plate of the adjustment assembly on the top of each of the leveled base plate units;

[0020] S3: First section of rebar cage straightening: hoist the first section of rebar cage and pass it through the hole; when the part of the rebar cage section to be straightened is located in the area of ​​the support base plate, control the driving parts of each of the limiting components to move, so that each extrusion part contacts and applies pressure. By monitoring the pressure of each extrusion part and adjusting the corresponding driving parts, each extrusion part applies uniform pressure to the rebar cage section, thereby straightening the first section of rebar cage section to the center position of the pile hole.

[0021] S4: Segmented lowering and cyclical straightening: Using the straightened steel cage segment as the docking reference, lower the subsequent steel cage segment to the straightened steel cage segment at the opening. When the steel cage segment moves to the straightening position, repeat the straightening operation of step S3 until all steel cages are lowered to the design elevation.

[0022] Furthermore, in steps S3 and S4, the pressure applied by each extrusion component is monitored and adjusted by reading the values ​​of the pressure sensors of each limiting component to ensure uniform pressure.

[0023] This invention has the following beneficial effects: 1. It adopts an "external embrace" design, with all components operating outside the reinforcing cage, completely avoiding interference with the internal structure of the reinforcing cage, making it particularly suitable for large square reinforcing cages with complex structures. It solves the problem of poor adaptability of existing internal support devices. Its modular, slidable, and adjustable base plate, combined with a graduated plug-in structure, enables rapid and visual alignment of the device with the center of the pile hole. With the independent, adjustable leveling support components, it not only lifts and stably supports the device but also precisely levels it, providing a reliable, absolutely horizontal reference surface for subsequent straightening operations, effectively solving the problems of uneven ground and difficulty in centering large pile foundation boreholes.

[0024] 2. A closed-loop force control system was constructed by integrating pressure sensors into the adjustment components. During the straightening process, the clamping force of each clamping component on the reinforcing cage can be monitored and adjusted independently in real time, ensuring uniform force application at multiple points, thereby dynamically and accurately correcting and stabilizing the reinforcing cage at the center of the pile hole. This completely changes the traditional extensive mode of relying on manual experience and manual mechanical clamping, and is especially suitable for large-scale anti-slide pile projects with extremely high verticality requirements.

[0025] 3. The entire installation, straightening, and dismantling process is completed on the ground at the pile hole opening, completely eliminating the safety risks of personnel working in deep holes, which is in line with modern safe construction concepts.

[0026] 4. Its "alignment-connection-lowering" cyclical process design perfectly matches the segmented hoisting process of the rebar cage. Each time, only the top of the current segment needs to be aligned to provide a precise benchmark for the connection of the next segment, realizing efficient and continuous construction of deep and long rebar cages with the principle of "aligning one segment and transferring benchmark for one segment", which significantly improves work efficiency.

[0027] 5. The adjustable base plate adopts a segmented design, which solves the problems of manufacturing, transporting, and hoisting large integral base plates, making the device easy to handle and assemble on complex construction sites. At the same time, the powerful radial locking mechanism formed by the bottom conical shell and the central external threaded cylinder locks the segmented base plate into a high-rigidity whole, ensuring the structural stability and reliability of the device when bearing the huge self-weight of the steel cage and construction loads.

[0028] 6. When connecting sections of the reinforcing cage, the top of the section already secured by the straightening device can be firmly held, becoming a highly stable reference in terms of spatial position and posture. This provides a precise and stable alignment reference for the suspended section of the reinforcing cage, greatly simplifying the alignment of the main reinforcement bars, reducing the time and difficulty of manual adjustment, and thus improving the efficiency of the reinforcing cage connection and the overall straightness.

[0029] 7. It supports the coordinated lowering and straightening of the steel cage in sections, eliminating the need for repeated disassembly and assembly of the device, and enabling continuous, efficient and high-quality installation of deep and long steel cages. Attached Figure Description

[0030] Figure 1 A three-dimensional structural diagram of the reinforcing cage straightening device for the invention;

[0031] Figure 2 This is a schematic diagram of the base support component structure;

[0032] Figure 3 A schematic diagram of the adjustable base plate structure;

[0033] Figure 4 For leveling the cross-sectional view of the support component;

[0034] Figure 5 A schematic diagram of the adjustment component structure;

[0035] Figure 6 This is a schematic diagram of the limit component structure.

[0036] In the figure, the components are: 1. Base support assembly; 2. Adjustment assembly; 3. Adjustment base plate; 4. Conical cylinder shell unit; 5. Threaded cylinder shell unit; 6. External threaded cylinder; 7. Rotary ring; 8. Base plate unit; 9. Threaded hole; 10. Leveling support assembly; 11. Insertion groove; 12. Insertion block; 13. Channel; 14. Cylinder; 15. Mounting cylinder; 16. Drive rod; 17. Handle; 18. Nut seat; 19. Second piston; 20. First piston; 21. Sliding rod; 22. Pad; 23. Anchor; 24. Support spring; 25. Hydraulic oil; 26. Support base plate; 27. Limiting assembly; 28. Drive component; 29. ​​Connecting valve pipe; 30. Support plate; 31. Pressure sensor; 32. Extrusion component. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0038] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. 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 scope of protection of the present invention.

[0039] The terms "front," "back," "left," "right," "up," "down," "back," "front," "top," and "bottom" indicate directions or positional relationships based on Figure 1 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the figures are for illustrative purposes only and should not be construed as limiting the present invention. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0040] like Figure 1 As shown, the rebar cage straightening device includes a bottom support assembly 1 and an adjustment assembly 2.

[0041] The base support assembly 1 is the basic platform for the device to achieve adaptive positioning and stable support. Its function is to ensure that it is quickly and accurately installed at the pile hole and to provide a horizontal reference surface. Its core is the adjusting base plate 3. The adjusting base plate 3 has a channel 13 in the center for the steel cage to pass through. The adjusting base plate 3 is slidably spliced ​​together by several base plate units 8, which form the channel 13 after being spliced ​​together. At the splice of two adjacent base plate units 8, there are interlocking blocks 12 and interlocking grooves 11 that slide and insert into each other. The interlocking blocks 12 are located on the periphery of the base plate units 8.

[0042] like Figure 2 or Figure 3 In the illustrated embodiment, the adjusting base plate 3 is formed by four independent steel base plate units 8 joined together. It should be noted that the number of base plate units 8 is not limited to this. Figure 2The number of units shown in the embodiment is determined according to actual needs. Each base plate unit 8 has a slot 11 machined at one end and a graduated plug-in block 12 integrally formed at the other end. The plug-in block 12 is located around the base plate unit 8 for easy observation of the graduations by the operator. During installation, the plug-in block 12 of one base plate unit 8 slides into the slot 11 of the adjacent base plate unit 8, forming a relatively sliding joint, allowing the four base plate units 8 to slide a short distance relative to each other. This design allows for easy alignment of the channel 13 formed at the center of the adjusting base plate 3 with the center of the pile hole during the initial installation phase by fine-tuning the position of each base plate unit 8, while also facilitating assembly. The graduations on the plug-in block 12 are used to record the relative position of each base plate unit 8 during construction of a specific pile diameter, facilitating the rapid replication of the same alignment state between different pile holes. The channel 13 is circular in this embodiment, but it is not limited to a circle; a square shape is also acceptable. The adjustment amount can be quantified by observing the graduations. For large anti-slide piles, if the adjusting base plate 3 is a single integral base plate covering the opening of such pile holes and needing to bear the load of heavy adjusting components and reinforcing cages, it would be an extremely cumbersome steel structure with problems such as high manufacturing costs, difficult transportation, and extreme inconvenience in on-site hoisting, handling, and alignment. The adjusting base plate 3 disclosed in this invention is assembled separately, thus avoiding the above problems.

[0043] like Figure 3 As shown, a leveling support assembly 10 is installed on each base plate unit 8 to adjust and fix the height and levelness of the base plate unit 8 relative to the ground. The leveling support assembly 10 can be an existing hydraulic jack, scissor lift mechanism, etc. This embodiment discloses a new leveling support assembly 10, such as... Figure 4 As shown, the leveling support assembly 10 includes a mounting cylinder 15, which is threadedly connected to the base plate unit 8. For example, each base plate unit 8 has a threaded hole 9, and the mounting cylinder 15 has an external thread. The connection is achieved by screwing the mounting cylinder 15 into the threaded hole 9 of the base plate unit 8. A cylinder 14 is integrally formed at the bottom end of the mounting cylinder 15. The cylinder 14 is a rectangular cylinder, meaning its inner cavity is rectangular. A sliding rod 21 passes through the bottom guide sleeve of the cylinder 14, and a first piston 20 is fixed at its top end. The first piston 20 and the cylinder 14 are in a sealed sliding fit. The bottom end extends out of the cylinder 14 and is connected to an anchor 23 for anchoring to the ground surface. The anchor 23 is a tapered rod, and a pad 22 is fixed at the top end of the tapered rod. The pad 22 is directly fixed to the bottom end of the sliding rod 21. The pad 22 abuts against the outer bottom wall of the mounting cylinder 15 to limit the movement and prevent the tapered rod from retracting into the mounting cylinder 15. A set of support springs 24 is fitted onto the sliding rod 21, with the top end pressing against the lower surface of the first piston 20 and the bottom end pressing against the inner bottom wall of the cylinder 14.

[0044] A drive rod 16 is mounted on the center of the top wall of the mounting cylinder 15 via a bearing. The top end of the drive rod 16 is located outside the mounting cylinder 15 and has a handle 17. The bottom end extends into the mounting cylinder 15, and the segment inside the mounting cylinder 15 is provided with external threads, which connect to a nut seat 18 via a threaded pair. The bottom end of the nut seat 18 is fixedly connected to or integrally formed with the second piston 19. The second piston 19 is sealed and slidably fitted inside the cylinder 14. Due to the square design of the inner cavity of the cylinder 14, the second piston 19 can only move up and down within the inner cavity of the cylinder 14 and cannot rotate. The chamber between the second piston 19 and the first piston 20 is filled with hydraulic oil 25.

[0045] Rotating the handle 17 drives the drive rod 16, which in turn moves the second piston 19 downwards via a threaded joint, compressing the hydraulic oil 25. The hydraulic pressure pushes the first piston 20 downwards, overcoming the elastic force of the support spring 24. This causes the sliding rod 21, the pad 22, and the tapered rod (which acts as an anchor) 23 to extend downwards until the tapered rod penetrates the ground, and the pad 22 compacts the soil. Rotating the handle 17 in the opposite direction retracts the piston. By finely adjusting the number of rotations of the handle 17 on each of the four support components 10, the support height at the four corner points can be independently controlled, allowing the entire adjusting base plate 3 to be precisely leveled using a level.

[0046] The leveling support assembly 10 has the following advantages:

[0047] Firstly, the drive rod 16 drives the second piston 19 through threaded transmission. Once the drive rod 16 is rotated by the handle 17 to push the second piston 19 to the predetermined position, its position is absolutely mechanically locked before the reverse torque is applied. This ensures that the device can maintain a leveling state for a long time without continuous power, making it highly reliable and adaptable to environments where power or oil may be cut off at the construction site.

[0048] Secondly, the sliding rod 21 moves within the cylinder 14, forming a highly directional plunger structure capable of withstanding significant lateral forces and bending moments that may occur during construction (such as accidental collisions from the reinforcing cage or frictional forces during base plate adjustments). The entire support assembly is compact and rigid, reliably locking the base plate at a horizontal position and predetermined height.

[0049] Thirdly, when the foundation below the four support points of the adjusting base plate 3 has different hardness, the hydraulic oil can flow slightly in this closed system, automatically balancing the small pressure difference between each point, playing an internal leveling and compensation role, so that the four leveling support components 10 can work together to adapt to the slightly uneven ground.

[0050] Fourth, the support spring 24 further absorbs vibration and impact, protecting the precision threaded transmission components.

[0051] After the base plate 3 is assembled, a reliable mechanism must be in place to lock it in place to prevent slippage under subsequent construction vibrations and loads. If bolts or pins are used to lock the base plate units, their shear and torsional resistance is insufficient. In this invention, if... Figure 2 As shown, conical shell units 4 are bolted to the bottom of each base plate unit 8, forming a tapered shell that gradually narrows from top to bottom. It is important to note that the joint between the conical shell units 4 and the base plate unit 8 is smooth after installation. A threaded shell unit 5 with internal threads is integrally formed at the bottom end of the conical shell unit 4; all threaded shell units 5 form an internally threaded cylinder; an externally threaded cylinder 6, which mates with the internally threaded cylinder, locks the relative positions of the assembled base plate units 8. The externally threaded cylinder 6 is compatible with the reinforcing cage, allowing the reinforcing cage to pass through the inner cavity of the externally threaded cylinder 6. When the four base plate units 8 are slidably assembled to the desired position, the four threaded shell units 5 also assemble at the center. At this point, an externally threaded cylinder 6 is screwed into the assembled threaded shell, and by tightening the rotating ring 7 at its lower end, the relative positions of the four base plate units 8 are firmly locked, forming a stable rigid base frame.

[0052] This structure, consisting of a conical shell, an internally threaded cylinder, and an externally threaded cylinder, provides a radial locking mechanism from the center outwards. It boasts high locking force, excellent self-locking, and reasonable stress distribution. The weight of the reinforcing cage (potentially tens of tons), the impact during lowering, and the reaction force generated by the hydraulic cylinder during righting are all transferred to the adjusting base plate 3, and then downwards. The conical shell collects and transfers the dispersed loads from the adjusting base plate 3 to the locking area of ​​the internally threaded cylinder at the bottom. This area, secured by the externally threaded cylinder 6, has extremely high strength. The adjusting base plate 3 is suspended above the orifice via the leveling support assembly 10. Lateral friction or collisions are likely to occur during the lowering of the reinforcing cage. The four conical shell units extend downwards and are ultimately locked together, significantly lowering the center of gravity of the device and forming a stable, lower-tightened structure, which improves the device's resistance to lateral forces and overturning moments.

[0053] The adjusting assembly 2 serves to straighten the reinforcing cage from the outside and includes multiple supporting base plates 26 and multiple limiting assemblies 27. For example... Figure 1 , Figure 3 and Figure 5In the illustrated embodiment, there are four arc-shaped support base plates 26, which are respectively mounted on the tops of four leveled base plate units 8 using high-strength bolts. Each support base plate 26 has at least one (three as disclosed in this embodiment) limiting component 27 arranged along its height direction. As shown in Figure 6, each limiting component 27 includes a radially telescopic drive member 28, which is a hydraulic telescopic cylinder with its cylinder body fixed to the support base plate 26. The piston rod end of the hydraulic telescopic cylinder is connected to a support plate 30. A pressure sensor 31 is mounted on the support plate 30, and the force-bearing surface of the pressure sensor 31 is connected to an arc-shaped or flat extrusion plate or extrusion block as an extrusion member 32. The extrusion member 32 is preferably flat, as it better conforms to the main reinforcement bars of the square steel cage. The hydraulic telescopic cylinder is connected to an external hydraulic pump station and control system (not shown in the figure) via a connecting valve pipe 29. The control system receives real-time, quantified signals from each pressure sensor 31 and independently controls the extension and retraction of each hydraulic telescopic cylinder, thereby precisely controlling the magnitude and synchronicity of the clamping force applied to the reinforcing cage by each extrusion member 32. The extrusion members 32 form an adjustable straightening space positioned at the center of the pile hole. The reinforcing cage passing through the hole 13 is straightened within this straightening space.

[0054] By introducing pressure sensor 31, the straightening process is upgraded from experience-based open-loop manual operation to closed-loop intelligent control based on quantitative feedback. This solves the problems of difficulty in applying uniform force, lack of overload protection, and poor state maintenance in the straightening of large rebar cages, ensuring the accuracy, safety, and consistency of the straightening force. Especially when dealing with complex conditions such as asymmetric correction of large square cages and segmented lowering of deep holes, its combination with the adjustable bottom support component 1 deeply integrates mechanical positioning and intelligent force control, achieving high-precision, high-efficiency, and high-reliability construction. For example, during segmented lowering of the rebar cage, in the repeated loosening-lowering-re-straightening cycle, it can quickly tighten with the same optimal force each time, greatly reducing manual adjustment time and improving the consistency of straightening quality across segments. This is crucial for ensuring the overall verticality of ultra-long rebar cages.

[0055] The method for installing large anti-slide pile reinforcement cages using this device is as follows:

[0056] S1: Device positioning and leveling:

[0057] First, after the pile hole is completed and accepted, the area around the hole opening is cleaned to ensure that the working surface at the hole opening is flat and stable.

[0058] Next, the four base plate units 8 are transported to the top of the pile hole opening and hoisted there for preliminary assembly. The preliminary assembly process is as follows: by pushing each base plate unit 8, the graduated plug-in block 12 slides in the plug-in groove 11 of the adjacent base plate unit 8. At the same time, the alignment of the channel 13 formed in the middle of the four base plate units 8 after assembly with the pile hole below is observed until the channel 13 is completely aligned with the center of the pile hole. The scale value of each graduated plug-in block 12 is recorded for quick positioning of subsequent pile holes of the same specification.

[0059] Then, temporarily pull apart the base plate unit 8 and install the conical shell units 4 on top of each other. Then put the base plate unit 8 back into the pile hole opening and assemble it to the recording position, so that the four threaded shell units 5 are aligned. Screw in the external threaded cylinder 6 and tighten the rotating ring 7 to lock the base plate unit 8.

[0060] Finally, operate each support component 10 in sequence. The specific process is as follows: First, turn the handle 17 to drive the drive rod 16 to rotate, so that the nut seat 18 drives the second piston 19 to move downward in the cylinder 14. The second piston 19 moves down and squeezes the hydraulic oil 25. The hydraulic oil 25 pushes the first piston 20 to move downward against the elastic force of the support spring 24, thereby driving the sliding rod 21 and the bottom pad 22 and anchor 23 to extend downward. Then, continue to turn the handle 17 until the conical rod, which serves as the anchor 23, is inserted into the foundation soil around the hole, and the pad 22 is in close contact with the ground. By observing the extension of each support component 10, and using tools such as a level or electronic level to check and adjust the levelness of the upper surface of the base plate 3, the bottom support component 1 reaches a horizontal and stable state by finely adjusting the number of rotations of the handle 17 at different positions, ensuring that the reference plane of the device is horizontal.

[0061] S2: Install the adjustment components: Install each support base plate 26 of the adjustment components 2 onto the top of each leveled base plate unit 8 using bolts. Connect the hydraulic lines of each limit component 27 to the control pump station, check and ensure that the hydraulic telescopic cylinders, pressure sensors 31 and extrusion parts 32 of each limit component 27 are normal, and that the valve pipe 29 is reliably connected.

[0062] S3: First section of steel cage straightening:

[0063] First, use cranes or other lifting equipment to vertically lift the first section of the steel cage to the opening of the pile hole. During the lifting, use multiple lifting points to ensure that the first section of the steel cage is vertical and has no obvious deformation. Slowly lower it so that it passes through the area enclosed by the support base plate 26 and the hole 13 in sequence. Temporarily support its bottom in the pre-set bracket inside the pile hole or suspend and fix it by slings, so that its bottom does not touch the bottom of the hole for the time being.

[0064] Next, the hydraulic telescopic cylinders of each limiting component 27 are activated to drive the support plate 30 and the extrusion member 32 to move towards the main reinforcement of the steel cage. By observing the reading of the pressure sensor 31, the extension amount of each hydraulic telescopic cylinder is controlled so that each extrusion member 32 contacts and holds the main reinforcement of the first steel cage segment with uniform and appropriate pressure. By applying force uniformly at multiple points, the verticality of the first steel cage segment is corrected and maintained so that its center coincides with the center of the pile hole.

[0065] Then, the top elevation and center position of the first steel cage segment are finally checked according to the design requirements.

[0066] S4: Subsequent segmental reinforcement cage straightening:

[0067] First, the second rebar cage segment is hoisted and connected to the already aligned first segment at the borehole opening. Because the first rebar cage segment is aligned and continuously tightened, it provides a highly stable and precise docking reference for the second segment. Based on this reference, operators can efficiently adjust the position of the suspended second rebar cage segment, thereby achieving rapid and accurate alignment of the main reinforcement bars.

[0068] Next, after the docking is completed, the temporary support or suspension of the first steel cage segment is released, the hydraulic telescopic cylinder is controlled to retract, so that the extrusion component 32 is separated from the lowered first steel cage segment, and the two steel cage segments are lowered as a whole until the top of the second steel cage segment reaches near the support base plate 26.

[0069] Then, repeat the S3 straightening operation on the top of the second section of the steel cage, that is, control the hydraulic telescopic cylinder to extend and control the extrusion component 32 to hold the top area of ​​the second section of the steel cage, and correct its verticality and center position again. At this time, the second section of the steel cage becomes a new and accurate docking reference.

[0070] Finally, follow this connection → lower → straighten cycle, working section by section until the entire steel cage is lowered to the design elevation.

[0071] S5: Final fixation to the device removal:

[0072] After the last section of the reinforcing cage is lowered into place and finally aligned by the straightening device, a lifting ring is welded to the top of the reinforcing cage at the reinforcing stirrup. The reinforcing cage is then fixed at the design elevation by crossbeams such as steel pipes on the borehole platform or the reinforcing bars embedded in the retaining wall to prevent it from sinking or floating. After confirming that the reinforcing cage is firmly fixed, the hydraulic telescopic cylinders of all the limiting components 27 are retracted, so that the pressing component 32 is completely detached from the reinforcing cage. Then, the connecting bolts between the support base plate 26 and the bottom plate unit 8 are removed, and the adjusting component 2 and the bottom support component 1 are moved away from the borehole. Then, the handle 17 is turned in the opposite direction to retract the anchor 23 of the support component 10. Finally, the external threaded cylinder 6 is loosened and removed to release the locking of the bottom plate unit 8. The adjusting bottom plate component 3 is then removed to complete the entire straightening process.

[0073] During the installation and straightening of the reinforcing cage, the sonic logging tubes are installed simultaneously. The sonic logging tubes are tied and fixed to the main reinforcing bars of the reinforcing cage, and lowered and connected in sections along with the reinforcing cage. Ensure that the sonic logging tubes are sealed and vertical, filled with water and sealed with plugs.

[0074] Although the present invention has been described herein with reference to embodiments thereof, the above embodiments are merely general implementations of the present invention, and the implementation of the present invention is not limited to the above embodiments. It should be understood that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rebar cage straightening device, characterized in that, It includes a bottom support assembly (1) for supporting the pile hole opening and an adjustment assembly (2) for applying a straightening effect to the steel cage from the outside. The base support assembly (1) includes an adjustable base plate (3) and a leveling support assembly (10); the adjustable base plate (3) has a channel (13) for the passage of the reinforcing cage in the center, and the adjustable base plate (3) is slidably spliced ​​from several base plate units (8), and the channel (13) is formed after the several base plate units (8) are spliced ​​together; a plug-in block (12) and a plug-in groove (11) are provided at the splice of two adjacent base plate units (8), and the plug-in block (12) is located on the periphery of the base plate unit (8); a leveling support assembly (10) is installed on each base plate unit (8), and the height and level of the base plate unit (8) relative to the ground are adjusted and fixed by the leveling support assembly (10); The adjustment component (2) includes multiple support base plates (26) and multiple limiting components (27). The multiple support base plates (26) are uniformly installed on the top of the adjustment base plate (3) around the center of the channel (13). Each support base plate (26) is provided with at least one limiting component (27) along its height direction. The limiting component (27) includes a radially telescopic drive (28) and an extrusion member (32) connected to the output end of the drive (28). All the extrusion members (32) are radially telescopic in a controlled manner under the drive of the drive (28) to form an adjustable straightening space that straightens and positions the steel cage passing through the channel (13) at the center of the pile hole.

2. The rebar cage straightening device according to claim 1, characterized in that, The limiting component (27) also includes a pressure sensor (31) disposed between the output end of the drive member (28) and the extruder (32).

3. The rebar cage straightening device according to claim 2, characterized in that, A support plate (30) is installed at the output end of the drive member (28), and the pressure sensor (31) is located between the support plate (30) and the extruder (32), and the pressure sensor (31) is fixed to the support plate (30).

4. The rebar cage straightening device according to claim 3, characterized in that, The extrusion part (32) is flat.

5. The rebar cage straightening device according to claim 1, characterized in that, The leveling support assembly (10) includes a mounting cylinder (15), a drive rod (16), and a second piston (19). The mounting cylinder (15) is threadedly connected to the base plate unit (8); the bottom end of the mounting cylinder (15) is integrally formed with a cylinder (14). A sliding rod (21) is movably inserted into the cylinder (14). A first piston (20) is fixedly connected to the top of the sliding rod (21). The first piston (20) is in a sealed sliding fit with the cylinder (14). The bottom end of the sliding rod (21) extends out of the cylinder (14) and is connected to an anchor (23) for anchoring to the ground surface. The drive rod (16) is rotatably mounted on the top of the mounting cylinder (15), and its bottom end extends into the cylinder (14) and is connected to the second piston (19). The second piston (19) is sealed and slidably fitted inside the cylinder (14). The cavity formed by the second piston (19), the first piston (20) and the cylinder (14) is filled with hydraulic medium.

6. The rebar cage straightening device according to claim 5, characterized in that, The leveling support assembly (10) also includes a support spring (24) sleeved on the sliding rod (21), with the two ends of the support spring (24) abutting against the first piston (20) and the inner bottom wall of the cylinder (14), respectively.

7. The rebar cage straightening device according to claim 1, characterized in that, A conical shell unit (4) is provided at the bottom of each of the base plate units (8), and all the conical shell units (4) surround and form a conical shell that gradually shrinks from top to bottom.

8. The rebar cage straightening device according to claim 7, characterized in that, The bottom end of the conical shell unit (4) is integrally formed with a threaded shell unit (5) with internal threads; all the threaded shell units (5) surround to form an internal threaded cylinder; the relative positions of the multiple base plate units (8) after splicing are locked by the external threaded cylinder (6) that is threaded with the internal threaded cylinder.

9. A method for straightening a reinforcing cage using the reinforcing cage straightening device as described in any one of claims 1-8, characterized in that, Includes the following steps: S1: Device positioning and leveling: Slide and splice each base plate unit (8) of the base support assembly (1) above the pile hole. According to the scale markings on the plug block (12), adjust the relative position of each base plate unit (8) so that the hole (13) formed after splicing is aligned with the pile hole and locked. Then, operate each leveling support assembly (10) to anchor to the ground surface, and adjust the driving amount of each leveling support assembly (10) to make the adjustment base plate (3) level as a whole. S2: Install the adjustment assembly: Install each support base plate (26) of the adjustment assembly (2) on the top of each of the leveled base plate units (8); S3: First section of steel cage straightening: hoist the first section of steel cage so that it passes through the hole (13); when the part of the steel cage to be straightened is located in the area of ​​the support base plate (26), control the driving part (28) of each of the limiting components (27) to move, so that each extrusion part (32) contacts and applies pressure. By monitoring the pressure of each extrusion part (32) and adjusting the corresponding driving part (28), each extrusion part (32) applies uniform pressure to the steel cage section, thereby straightening the first section of steel cage to the center position of the pile hole; S4: Segmented lowering and cyclical straightening: Using the straightened steel cage segment as the docking reference, lower the subsequent steel cage segment to the straightened steel cage segment at the opening. When the steel cage segment moves to the straightening position, repeat the straightening operation of step S3 until all steel cages are lowered to the design elevation.

10. The method for straightening a reinforcing cage according to claim 9, characterized in that, In steps S3 and S4, the pressure applied by each extruder (32) is monitored and adjusted by reading the values ​​of the pressure sensors (31) of each limiting component (27) to ensure uniform pressure.

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