A mechanical locking jacking reinforcement device with a penetrating pin and a construction method thereof

Abstract

The application discloses a piercing mechanical locking jacking reinforcing device, which comprises a liftable locking support, the support comprises a sliding channel outer cylinder provided with an external locking clamping groove, a jacking piston column provided with an internal locking clamping groove, and a separate locking pin; during construction, the jacking piston column is jacked by a recoverable hydraulic jack until the internal and external clamping grooves are aligned, then the locking pin is transversely inserted into the two clamping grooves to form a pin bolt connection to complete rigid locking, the locking mechanism is reliable, can resist axial, radial and torsional loads, is safe and efficient, and has remarkable economic benefits.

Description

Technical Field

[0001] This invention belongs to the field of building structure reinforcement technology, and particularly relates to a pin-type mechanical locking jacking reinforcement device and its construction method for the pile foundation replacement and lifting and repositioning of steel structure columns in steel structure factories, warehouses and other buildings with settlement. Background Technology

[0002] Steel structures are widely used in industrial plants, warehousing and logistics facilities, and public buildings due to their high strength, light weight, and quick construction. However, due to complex geological conditions, unclear surveys, or load variations, uneven settlement of the building foundation can easily occur, leading to vertical displacement of the upper steel structure columns. This can then cause a series of serious problems such as wall cracking, roof deformation, and crane beam malfunction, affecting the normal use and structural safety of the building.

[0003] Traditional reinforcement methods typically involve adding piles on both sides of the column, then transferring the load to the new piles using methods such as "beam-type transfer layers" or "column clamping." When it's necessary to lift and reposition the column, traditional methods often involve welding temporary corbels to the column, using multiple hydraulic jacks for jacking, and then filling and compacting the space reserved between the corbels and the new foundation with steel plates or concrete. Alternatively, some solutions require installing permanent lifting bolts on both sides of the column, lifting it by rotating the bolts. However, these methods have several drawbacks: Construction is complex and high-risk: on-site welding of temporary support brackets can damage the original structure, and the welding quality is difficult to guarantee; the synchronous control of multiple hydraulic jacks requires high precision, and improper operation can easily lead to structural overturning. Equipment occupation and cost issues: if large hydraulic jacks or screw mechanisms are permanently sealed inside the structure after lifting, it will result in huge waste of equipment costs; if they need to be retrieved, secondary support and conversion are required, making the process cumbersome. Locking mechanisms are difficult and have low reliability: after jacking into place, steel plate welding or high-strength grouting in a confined space is difficult to construct, the quality is hard to guarantee, and secondary settlement is likely to occur during later operation. Especially in situations with fire prevention and explosion-proof requirements, on-site hot work welding is strictly limited.

[0004] Therefore, there is an urgent need for a steel structure column lifting and reinforcement device that is safe and easy to construct, allows for complete recovery of the hydraulic jack, eliminates the need for open flame during the locking process, and provides a long-term reliable locking effect. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a steel structure column lifting and reinforcement device and its construction method that uses mechanical clamps for locking. This device is ingeniously designed, integrating lifting and locking functions into a reusable support, and has outstanding advantages such as construction safety, retrievable hydraulic jacks, quick and reliable mechanical locking, and no need for on-site hot work.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A steel structure column lifting and reinforcement device using mechanical clamps for locking, comprising: The force transmission components include force transmission brackets (2) fixed on both sides of the steel structure column (1) and a flat beam (3) placed on the force transmission brackets.

[0007] The new foundation piles are symmetrically arranged on both sides of the existing foundation of the steel structure column (1) and the pile caps (5) are fixed on the top of the piles. The pile caps (5) are provided with embedded steel plates (6).

[0008] The lifting pad beam (7) is located below the end of the spreader beam (3).

[0009] Two adjustable locking supports (8) are arranged symmetrically; the bottom of each support is fixedly installed on the pre-embedded steel plate (6) of the pile cap, and its top can be lifted to support the lifting pad beam (7).

[0010] Furthermore, the internal structure of the liftable locking support (8) includes: The outer cylinder of the slide (81) is a thick-walled cylindrical component with a base plate (811) fixed on the pre-embedded steel plate (6) of the pile cap; a through locking groove (812) is symmetrically opened in the radial direction on its cylinder wall.

[0011] The load-bearing ring (82) is a ring-shaped steel plate that is horizontally fixed in the middle of the inner wall of the outer cylinder (81) of the slide. The load-bearing ring has a limiting groove (821) for the limiting steel plate described below to pass through, and a central through hole (822) for the hydraulic jack (9) to pass through.

[0012] The lifting piston column (83) is an inverted "T" shaped structure. Its upper part is a pressure-bearing platform that supports the lifting pad beam (7), and its lower part is a solid column. The bottom end of the solid column is radially symmetrically welded with a limiting steel plate (831). The size and orientation of the limiting steel plate enable it to pass through the limiting groove (821) on the load-bearing ring (82) when rotated to a specific angle.

[0013] Locking clamp (84), one or more independent block or plate-shaped steel components, the dimensions of which allow them to be inserted laterally into the locking groove (812) of the outer cylinder of the slide (81).

[0014] Furthermore, the liftable locking support (8) also includes a load-bearing ring (82) fixed to the inner wall of the outer cylinder (81) of the slide. After the locking pin (84) is inserted, its upper surface contacts the lower surface of the load-bearing ring (82) to transmit pressure.

[0015] On the other hand, a construction method for a steel structure column lifting and reinforcement device using mechanical clamps is also provided, characterized by the following steps: Step 1, Foundation Construction: Drive pile foundation (4) and pile cap (5), and fix the slide outer cylinder (81) of the liftable locking support (8) on the pre-embedded steel plate (6) of the pile cap.

[0016] Step 2, Installation of force transmission components: Fix the force transmission bracket (2) to the steel structure column (1), and then place the spreader beam (3) on the force transmission bracket (2).

[0017] Step 3: Installation of lifting components: Place the lifting pad beam (7) below the end of the spreader beam (3); hoist the lifting piston column (83) into the outer cylinder (81) of the slide, rotate it so that the bottom limiting steel plate (831) is aligned with the limiting groove (821) on the bearing ring (82) and passes through it, then rotate it 90 degrees to make the limiting steel plate (831) and the bearing ring (82) misaligned.

[0018] Step 4, Lifting Operation: Place the hydraulic jack (9) under the lifting piston column (83) through the central through hole (822) of the bearing ring (82), start the hydraulic jack, and lift the piston column upward until the steel structure column (1) is lifted to the predetermined elevation.

[0019] Step 5, Mechanical locking: Under the pressure-holding state of the hydraulic jack (9), the locking clamp (84) is inserted laterally through the locking groove (812) opened on the wall of the outer cylinder (81) of the slide, so that it completely fills and locks the gap between the top surface of the limiting steel plate (831) and the bottom surface of the bearing ring (82) to form a rigid mechanical lock.

[0020] Step 6, Equipment Recovery: After confirming that the locking clamp (84) is securely placed, perform an oil return operation on the hydraulic jack (9) and completely remove it from the central through hole (822).

[0021] Step 7: Permanent integral pouring: After all columns are reinforced, remove the temporary components, use all permanent steel components as the internal skeleton, wrap them with steel bars and pour concrete to form a permanent reinforced foundation (10).

[0022] Compared with the prior art, the present invention has the following significant advantages: (1) Construction safety, no need to break columns: The steel structure columns can continuously bear the load throughout the entire lifting and reinforcement process by using pile foundation replacement technology, without interrupting production or operation, thus minimizing the impact of construction on the use of the building.

[0023] (2) The equipment is recyclable and has high economic benefits: The core lifting equipment, the hydraulic jack, can be completely and undamagedly removed and reused after lifting and locking, which significantly reduces the reinforcement cost of a single column.

[0024] (3) The locking mechanism is ingenious and reliable, and the construction is extremely simple and quick: It abandons the complex threads, wedges, or on-site welding, and adopts an innovative "external insertion locking mechanism of mechanical clamps". After being lifted into place, it is only necessary to insert the standardized locking clamps from the external locking slots to complete the permanent locking. This operation requires no electricity, produces no sparks, and produces no smoke or dust, making it especially suitable for the reinforcement of chemical and warehouse plants with high fire and explosion protection requirements. Compared with welding, this method has lower requirements for workers' skills, shorter operation time, uniform and reliable locking quality, and is completely unrestricted by confined spaces, greatly improving construction efficiency and safety.

[0025] (4) The lifting and reinforcement are integrated, resulting in significant efficiency: All steel components (force transmission brackets, spreader beams, supports, etc.) that serve as temporary force transmission and support devices are not removed after completion, but are instead used as the internal steel skeleton of the permanent reinforcement structure. By pouring concrete as a whole, they become part of the new foundation and share the load, eliminating the need for equipment dismantling and secondary reinforcement, and greatly shortening the construction period. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 Front view of the overall structure of the device of the present invention; Figure 2 Side view of the overall structure of the device of the present invention; Figure 3 An exploded view of the core component of this invention, the "liftable locking support"; Figure 4 A cross-sectional view of the assembly and locking state of the core component of this invention, the "liftable locking support".

[0028] Explanation of reference numerals in the attached figures: 1-Steel structure column; 2-Force transmission bracket; 3-Carrying beam; 4-Pile foundation; 5-Pile cap; 6-Pile cap embedded steel plate; 7-Lifting pad beam; 8-Liftable locking support; 9-Hydraulic jack; 10-Permanent reinforcement foundation; 11-Steel structure column foundation; 12-Stiffening plate 1 (optional, used between the bracket and the carrying beam); 13-Stiffening plate 2 (optional, used between the carrying beam and the lifting pad beam); 81-Slide outer cylinder; 811-Base plate; 812-Locking groove; 82-Bearing ring; 821-Limiting groove; 822-Central through hole; 83-Lifting piston column; 831-Limiting steel plate; 84-Locking clamp. Detailed Implementation

[0029] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] like Figure 1 and Figure 2 As shown, the present invention is a steel structure column lifting and reinforcement device for settlement control of steel structure columns (1), which uses mechanical clamps for locking, and includes: Force transmission components: force transmission brackets (2) fixed on both sides of the steel structure column (1), and a flat beam (3) placed on the force transmission brackets.

[0031] New foundation piles: piles (4) are symmetrically arranged on both sides of the existing foundation of the steel structure column (1) and pile caps (5) are fixed on the top of the piles. The pile caps (5) are provided with embedded steel plates (6).

[0032] Lifting pad beam (7): Located below the end of the spreader beam (3).

[0033] Liftable locking support (8): There are two of them, symmetrically arranged; the bottom of each support is fixedly installed on the pre-embedded steel plate (6) of the pile cap, and its top can lift and support the lifting pad beam (7).

[0034] Figure 3 and Figure 4 The internal structure and working principle of the core component of this invention—the liftable locking support (8)—are shown in detail. The outer cylinder (81) of the support (8) is welded and fixed to the pre-embedded steel plate (6) of the pile cap through its base plate (811). The load-bearing ring (82) inside the outer cylinder (81) is a key force conversion component.

[0035] Slide outer cylinder (81): A thick-walled cylindrical component with a base plate (811) fixed on a pre-embedded steel plate (6) of a pile cap; a through locking groove (812) is symmetrically provided on its cylinder wall along the radial direction.

[0036] Load-bearing ring (82): A ring-shaped steel plate horizontally fixed in the middle of the inner wall of the outer cylinder (81) of the slide. The load-bearing ring has a limiting groove (821) for the limiting steel plate described below to pass through, and a central through hole (822) for the hydraulic jack (9) to pass through.

[0037] Lifting piston column (83): an inverted "T" shaped structure, the upper part of which is a pressure-bearing platform supporting the lifting pad beam (7), and the lower part is a solid column; the bottom end of the solid column is radially symmetrically welded with a limiting steel plate (831), the size and orientation of which allow it to pass through the limiting groove (821) on the bearing ring (82) when rotated to a specific angle.

[0038] Locking clamp (84): one or more independent block or plate-shaped steel components whose external dimensions allow them to be inserted laterally into the locking groove (812) of the slide outer cylinder (81).

[0039] The liftable locking support (8) also includes a load-bearing ring (82) fixed to the inner wall of the outer cylinder (81) of the slide. After the locking pin (84) is inserted, its upper surface contacts the lower surface of the load-bearing ring (82) to transmit pressure.

[0040] This invention also provides a construction method for a steel structure column lifting and reinforcement device using mechanical clamps, characterized by the following steps: Step 1, Foundation Construction: Drive pile foundation (4) and pile cap (5), and fix the slide outer cylinder (81) of the liftable locking support (8) on the pre-embedded steel plate (6) of the pile cap.

[0041] Step 2, Installation of force transmission components: Fix the force transmission bracket (2) to the steel structure column (1), and then place the spreader beam (3) on the force transmission bracket (2).

[0042] Step 3: Installation of lifting components: Place the lifting pad beam (7) below the end of the spreader beam (3); hoist the lifting piston column (83) into the outer cylinder (81) of the slide, rotate it so that the bottom limiting steel plate (831) is aligned with the limiting groove (821) on the bearing ring (82) and passes through it, then rotate it 90 degrees to make the limiting steel plate (831) and the bearing ring (82) misaligned.

[0043] Step 4, Lifting Operation: Place the hydraulic jack (9) under the lifting piston column (83) through the central through hole (822) of the bearing ring (82), start the hydraulic jack, and lift the piston column upward until the steel structure column (1) is lifted to the predetermined elevation.

[0044] Step 5, Mechanical locking: Under the pressure-holding state of the hydraulic jack (9), the locking clamp (84) is inserted laterally through the locking groove (812) opened on the wall of the outer cylinder (81) of the slide, so that it completely fills and locks the gap between the top surface of the limiting steel plate (831) and the bottom surface of the bearing ring (82) to form a rigid mechanical lock.

[0045] Step 6, Equipment Recovery: After confirming that the locking clamp (84) is securely placed, perform an oil return operation on the hydraulic jack (9) and completely remove it from the central through hole (822).

[0046] Step 7: Permanent integral pouring: After all columns are reinforced, remove the temporary components, use all permanent steel components as the internal skeleton, wrap them with steel bars and pour concrete to form a permanent reinforced foundation (10).

[0047] The construction process is described in detail as follows: First, on both sides of the original steel structure column foundation (11) of the column (1) that has settled, two sets of pile foundations (4) are constructed by static pressure method or drilling method. Pile caps (5) are poured on the top of the pile foundations. Pile cap embedded steel plates (6) are set on the top surface of the pile caps (5) through embedded parts to provide a solid foundation for the superstructure.

[0048] Next, the force-transmitting brackets (2) are reliably fixed to the predetermined elevation of the steel structure column (1) by high-strength bolts or welding. Then, the large-span spreader beam (3) is placed on the force-transmitting brackets (2) on both sides. Lifting pad beams (7) are placed below both ends of the spreader beam (3). To enhance the connection stiffness, stiffening plates 1 (12) and 2 (13) can be installed at the connection.

[0049] Next, the installation and lifting process: The lifting piston column (83) is hoisted into the outer cylinder (81) of the slide. By rotating it, the limiting steel plate (831) at its bottom is aligned with and passes through the limiting groove (821) on the bearing ring (82). After passing through, the piston column (83) is rotated 90 degrees. At this time, the limiting steel plate (831) is supported by the bearing ring (82) and cannot fall. Then, a thin hydraulic jack (9) is placed between the bottom plate of the outer cylinder (81) and the bottom surface of the lifting piston column (83) through the central through hole (822) of the bearing ring (82). The hydraulic device is started, and the hydraulic jack (9) lifts the piston column (83) upward. The piston column (83) then lifts the lifting pad beam (7) upward through the pressure platform at its top, thereby driving the entire spreader beam (3), the force transmission bracket (2) and the steel structure column (1) to be lifted synchronously and smoothly.

[0050] Then, the locking and equipment recovery process: After the column (1) is raised to the design elevation, the hydraulic jack (9) maintains pressure. At this time, a precise gap has been formed between the top surface of the limiting steel plate (831) and the bottom surface of the bearing ring (82). The operator easily inserts the prefabricated high-strength steel locking clamp (84) into the locking groove (812) outside the slide outer cylinder (81). The thickness of the clamp (84) is precisely matched with the height of the gap formed after the lifting, and after insertion, it rigidly locks the positional relationship between the limiting steel plate (831) and the bearing ring (82). The load transmission path becomes: column → corbel → spreader beam → lifting pad beam → piston column → limiting steel plate → locking clamp → bearing ring → slide outer cylinder → pile cap → pile foundation. After confirming that the locking is reliable, return oil to the jack (9) to release pressure. At this time, the hydraulic jack is completely relaxed and can be easily removed from the central through hole (822) for the next use.

[0051] Final reinforcement: After all the columns requiring reinforcement have been raised and locked, the final overall pouring is carried out. All exposed steel components, including the load-bearing bracket (2), the spreader beam (3), the lifting pad beam (7), and the entire liftable locking support (8), are used as a permanent internal steel frame. Steel mesh is tied around the frame and formwork is erected. Concrete is then poured to form a new, solid, and permanently reinforced foundation (10). At this point, the entire raising and reinforcement work is complete.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any simple modifications, equivalent substitutions, or improvements made to the above embodiments based on the technical essence of the present invention should still fall within the protection scope of the present invention.

[0053] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A lifting and reinforcing device with a pin-type mechanical locking mechanism, comprising: The force transmission components include force transmission brackets (2) fixed on both sides of the steel structure column (1) and a flat beam (3) placed on the force transmission brackets. The new foundation piles are symmetrically arranged on both sides of the existing foundation of the steel structure column (1) and the pile caps (5) are fixed on the top of the piles. The pile caps (5) are provided with embedded steel plates (6). A lifting pad beam (7) is positioned below the end of the spreader beam (3); Two liftable locking supports (8); the bottom of each support is fixedly installed on the pre-embedded steel plate (6) of the pile cap, and its top can liftably support the lifting pad beam (7).

2. The apparatus according to claim 1, characterized in that, The internal structure of the liftable locking support (8) includes: The outer cylinder of the slide (81) is a thick-walled cylindrical component with a base plate (811) fixed on the embedded steel plate (6) of the pile cap; a through locking groove (812) is symmetrically opened in the radial direction on its cylinder wall. The load-bearing ring (82) is a ring-shaped steel plate that is horizontally fixed in the middle of the inner wall of the outer cylinder (81) of the slide. The load-bearing ring has a limiting groove (821) for the limiting steel plate described below to pass through, and a central through hole (822) for the hydraulic jack (9) to pass through. The lifting piston column (83) is an inverted "T" shaped structure. Its upper part is a pressure-bearing platform that supports the lifting pad beam (7), and its lower part is a solid column. The bottom end of the solid column is radially symmetrically welded with a limiting steel plate (831). The size and orientation of the limiting steel plate enable it to pass through the limiting groove (821) on the load-bearing ring (82) when rotated to a specific angle. Locking clamp (84), one or more independent block or plate-shaped steel components, the dimensions of which allow them to be inserted laterally into the locking groove (812) of the outer cylinder of the slide (81).

3. The apparatus according to claim 1, characterized in that, The liftable locking support (8) also includes a load-bearing ring (82) fixed to the inner wall of the outer cylinder (81) of the slide. After the locking pin (84) is inserted, its upper surface contacts the lower surface of the load-bearing ring (82) to transmit pressure.

4. A method for constructing the apparatus according to any one of claims 1 to 3, characterized in that, Includes the following steps: Step 1, Foundation Construction: Drive pile foundation (4) and pile cap (5), and fix the sliding outer cylinder (81) of the liftable locking support (8) on the pre-embedded steel plate (6) of the pile cap; Step 2, Installation of force transmission components: Fix the force transmission bracket (2) to the steel structure column (1), and then place the spreader beam (3) on the force transmission bracket (2); Step 3, Installation of lifting components: Place the lifting pad beam (7) below the end of the spreader beam (3); hoist the lifting piston column (83) into the outer cylinder (81) of the slide, rotate it so that the bottom limiting steel plate (831) is aligned with the limiting groove (821) on the bearing ring (82) and passes through it, then rotate it 90 degrees to make the limiting steel plate (831) and the bearing ring (82) staggered; Step 4, Lifting Operation: Place the hydraulic jack (9) below the lifting piston column (83) through the central through hole (822) of the bearing ring (82), start the hydraulic jack, and lift the piston column upward until the steel structure column (1) is lifted to the predetermined elevation; Step 5, Mechanical locking: Under the pressure-holding state of the hydraulic jack (9), the locking clamp (84) is inserted laterally through the locking groove (812) opened on the wall of the outer cylinder (81) of the slide, so that it completely fills and locks the gap between the top surface of the limiting steel plate (831) and the bottom surface of the bearing ring (82) to form a rigid mechanical lock; Step 6, Equipment Recovery: After confirming that the locking clamp (84) is securely placed, perform an oil return operation on the hydraulic jack (9) and completely remove it from the central through hole (822); Step 7: Permanent integral pouring: After all columns are reinforced, remove the temporary components, use all permanent steel components as the internal skeleton, wrap them with steel bars and pour concrete to form a permanent reinforced foundation (10).

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