Large-span cover piece tensioning and anchoring structure

Abstract

The application provides a large-span cover piece tensioning anchoring structure, which comprises a stand column, a lower cross beam and an upper cross beam are arranged at the upper end of the stand column, a supporting rod is arranged at the inner side of the upper cross beam, a tensioning platform is arranged at the outer side of the upper cross beam, an anchor plate is further arranged above the tensioning platform, the lower end of the anchor plate is attached to and connected to the outer side of the upper cross beam, a plurality of prestressed penetrating holes are arranged at the upper end of the anchor plate, the prestressed tendons of the cover piece pass through the prestressed penetrating holes, a tensioning device is sleeved on the prestressed tendons, a pre-embedded part is arranged in the tensioning platform, a first pull rod is arranged at the upper end of the pre-embedded part, the upper end of the first pull rod is connected to the upper end of the anchor plate, a second pull rod is arranged at the lower end of the pre-embedded part, and the lower end of the second pull rod is connected to the lower cross beam, thereby solving the anchoring problem of the two ends of the large-span cover piece.

Description

Technical Field

[0001] This utility model relates to the field of construction of large-span cover components, and in particular to a tensioning and anchoring structure for large-span cover components. Background Technology

[0002] During the construction of large building structures, when it is necessary to install large-span covering components (such as large roof panels, trusses, space frames or mega-beams) on the top, due to their extremely large span and heavy weight, the components will undergo significant elastic deformation under their own weight. The downward bending deformation in the middle area of ​​the component will cause the two ends to bend upward accordingly, resulting in a change in the direction of the force exerted by the component on its two end support points. The force on the supporting columns at both ends changes from vertically downward to obliquely downward and outward.

[0003] The lateral force on the column causes lateral bending deformation, increasing the internal bending moment and shear force, leading to column buckling instability. Therefore, there is an urgent need for a structure that can straighten and anchor the cover. Utility Model Content

[0004] This utility model provides a tensioning and anchoring structure for large-span cover components, which solves the problem of anchoring both ends of large-span cover components.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a tensioning and anchoring structure for a large-span cover, including a column, a lower crossbeam and an upper crossbeam at the upper end of the column, a bracing rod on the inner side of the upper crossbeam, a tensioning platform on the outer side of the upper crossbeam, an anchor plate above the tensioning platform, the lower end of the anchor plate abutting and connecting to the outer side of the upper crossbeam, a plurality of prestressing tendons passing through the upper end of the anchor plate, the prestressing tendons of the cover passing through the prestressing tendons passing through the prestressing tendons, a tensioner fitted on the prestressing tendons, an embedded part inside the tensioning platform, a first tie rod at the upper end of the embedded part, the upper end of the first tie rod connecting to the upper end of the anchor plate, a second tie rod at the lower end of the embedded part, and the lower end of the second tie rod connecting to the lower crossbeam.

[0006] In the preferred embodiment, angle steel is pre-embedded at the upper corner of the upper crossbeam, and a first pre-embedded screw is pre-embedded in the middle of the upper crossbeam. The end of the first pre-embedded screw near the anchor plate is provided with a first contact plate on the outer surface of the upper crossbeam, and a second contact plate is also provided. One side of the second contact plate is attached to the angle steel and the first pre-embedded screw, and the anchor plate is attached to the second contact plate. The end of the first pre-embedded screw passes through the first contact plate, the second contact plate and the anchor plate. A nut is sleeved on the first pre-embedded screw and presses the lower end of the anchor plate.

[0007] In a preferred embodiment, the first pull rod and the second pull rod include a tie rod and a swing angle assembly disposed at both ends of the tie rod. The swing angle assembly includes a first U-shaped swing member and a second U-shaped swing member that are hinged to each other, and is also provided with a threaded sleeve. The threaded sleeve is rotatably sleeved with the second U-shaped swing member. One end of the threaded sleeve is provided with a stop cap, which stops on the second U-shaped swing member. The other end of the threaded sleeve is threadedly sleeved with the tie rod.

[0008] In a preferred embodiment, a connecting shaft is also provided, which passes through and is sleeved on the side wall of the U-shaped mechanism of the first U-shaped ornament and the second U-shaped ornament. Each end of the connecting shaft is provided with a stop step, and the first locking nut is sleeved on both ends of the connecting shaft with the end of the first locking nut abutting against the stop step.

[0009] In the preferred embodiment, the upper end of the anchor plate is provided with multiple through holes, and a screw assembly is provided at the through holes. Nuts are provided at both ends of the screw assembly. The first U-shaped swing piece is provided with mounting holes. The screw assembly passes through the screw assembly of the first pull rod, and the nut of the screw assembly presses against the first U-shaped swing piece.

[0010] In a preferred embodiment, the embedded part includes a central threaded sleeve disposed within the tensioning platform. The central threaded sleeve has second contact plates at both ends. A threaded through screw is disposed inside the central threaded sleeve. The two ends of the through screw extend out of the tensioning platform. The two ends of the through screw are provided with second locking nuts. The first U-shaped swing member of the first tie rod and the second tie rod abuts against the second contact plate. The through screw passes through the first U-shaped swing member and the second locking nut presses against the first U-shaped swing member.

[0011] The beneficial effects of this utility model are as follows: Anchor plates are installed on the upper crossbeam to tighten both ends of the cover, thereby straightening the cover as a whole and preventing the column from being subjected to lateral forces; the back side of the upper stress point of the anchor plate is tightened by the outward extension tensioning to prevent the anchor rod from bending and deforming; the lower crossbeam is tightened by the tie rod to tighten the upper crossbeam, and the support rod is pressed against the inner side of the upper crossbeam to prevent the upper crossbeam itself from deforming. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram illustrating the application of this utility model.

[0014] Figure 2 This is a schematic diagram of tensioning and anchoring one end of the cover.

[0015] Figure 3 This is an enlarged view of the tensioned anchorage structure.

[0016] Figure 4 This is a schematic diagram of the anchor plate structure.

[0017] Figure 5 This is a schematic diagram of the pull rod.

[0018] Figure 6 This is a schematic diagram of the rocker arm assembly at the end of the anchor plate.

[0019] Figure 7 This is a structural diagram of the embedded parts of the tensioning platform.

[0020] In the diagram: Cover 1; Prestressed tendon 101; Support rod 2; Upper crossbeam 3; Tensioning platform 301; Embedded part 302; Angle steel 303; First embedded screw 304; First contact plate 305; Second contact plate 306; Central threaded sleeve 307; Through screw 308; Second locking nut 309; Column 4; Lower crossbeam 5; Anchor plate 6; Prestressed tendon through hole 601; Through hole 602; Draping plate 603; First tie rod 7; Tie rod 701; Swing angle assembly 702; First U-shaped swing member 703; Second U-shaped swing member 704; Threaded sleeve 705; Stop cap 706; Connecting shaft 707; Stop step 708; First locking nut 709; Mounting hole 710; Second tie rod 8; Tensioner 9; Screw assembly 10; Second embedded screw 11. Detailed Implementation

[0021] Example 1:

[0022] like Figure 1-7 In a large-span cover tensioning and anchoring structure, there is a column 4. The upper end of the column 4 is provided with a lower crossbeam 5 and an upper crossbeam 3. The inner side of the upper crossbeam 3 is provided with a support rod 2. The outer side of the upper crossbeam 3 is provided with a tensioning platform 301. An anchor plate 6 is also provided above the tensioning platform 301. The lower end of the anchor plate 6 is attached to and connected to the outer side of the upper crossbeam 3. The upper end of the anchor plate 6 is provided with multiple prestressing tendons 101. The prestressing tendons 101 of the cover 1 pass through the prestressing tendons 601. Tensioners 9 are sleeved on the prestressing tendons 101. An embedded part 302 is provided in the tensioning platform 301. The upper end of the embedded part 302 is provided with a first tie rod 7. The upper end of the first tie rod 7 is connected to the upper end of the anchor plate 6. The lower end of the embedded part 302 is provided with a second tie rod 8. The lower end of the second tie rod 8 is connected to the lower crossbeam 5.

[0023] When tensioner 9 tensions prestressed tendons 101, it applies an inward force to the upper crossbeam 3 and supports the inner side of the upper crossbeam 3 with strut 2 to prevent the upper crossbeam 3 from deviating inward during tensioning. A tensioning platform 301 is pre-constructed on the outer side of the upper crossbeam 3, and embedded parts 302 are pre-embedded at the inner and outer ends of the tensioning platform 301 as stress points. Since the upper end of the anchor plate 6 is overhanging, in order to avoid deformation of the anchor plate 6, a first tie rod 7 is connected to the upper end of the anchor plate 6. The lower end of the first tie rod 7 is fixed to the embedded part 302. At this time, the tensioning reaction force applies an upward component force to the tensioning platform 301. In order to avoid upward deformation of the tensioning platform 301, a second tie rod 8 is connected to the lower end of the embedded part 302. The lower end of the second tie rod 8 is fixed to the lower crossbeam 5.

[0024] In the preferred embodiment, an angle steel 303 is pre-embedded at the upper corner of the upper crossbeam 3, and a first pre-embedded screw 304 is pre-embedded in the middle of the upper crossbeam 3. The end of the first pre-embedded screw 304 near the anchor plate 6 is provided with a first contact plate 305 on the outer surface of the upper crossbeam 3, and a second contact plate 306 is also provided. One side of the second contact plate 306 is attached to the angle steel 303 and the first pre-embedded screw 304, and the anchor plate 6 is attached to the second contact plate 306. The end of the first pre-embedded screw 304 passes through the first contact plate 305, the second contact plate 306 and the anchor plate 6. A nut is sleeved on the first pre-embedded screw 304 and presses the lower end of the anchor plate 6.

[0025] The tension force is transmitted to the angle steel 303 and the first contact plate 305 through the anchor plate 6, and then distributed to the concrete structure of the upper beam 3 to prevent the surface of the upper beam 3 from being crushed by concentrated force and the edges and corners from cracking.

[0026] A second pre-embedded screw rod 11 is pre-embedded in the lower crossbeam 5 to connect the lower end of the second tie rod 8.

[0027] In a preferred embodiment, the first pull rod 7 and the second pull rod 8 include a pull rod 701 and a swing angle assembly 702 disposed at both ends of the pull rod 701. The swing angle assembly 702 includes a first U-shaped swing member 703 and a second U-shaped swing member 704 that are hinged to each other, and also provides a threaded sleeve 705. The threaded sleeve 705 is rotatably sleeved with the second U-shaped swing member 704. One end of the threaded sleeve 705 is provided with a stop cap 706, which stops on the second U-shaped swing member 704. The other end of the threaded sleeve 705 is threadedly sleeved with the pull rod 701.

[0028] The first U-shaped ornament 703 is installed on the lower crossbeam 5, the embedded part 302, or the anchor plate 6.

[0029] The stop cap 706 is located inside the U-shaped structure of the second U-shaped ornament 704. The extension length of the tie rod 701 can be adjusted by rotating the screw sleeve 705, thereby changing the tension force on the anchor plate 6. The included angle between the first U-shaped ornament 703 and the second U-shaped ornament 704 changes adaptively with the total length of the first tie rod 7 or the second tie rod 8.

[0030] In a preferred embodiment, a connecting shaft 707 is also provided. The connecting shaft 707 passes through and is sleeved on the side wall of the U-shaped mechanism of the first U-shaped ornament 703 and the second U-shaped ornament 704. Each end of the connecting shaft 707 is provided with a stop step 708. A first locking nut 709 is sleeved on both ends of the connecting shaft 707 and the end of the first locking nut 709 abuts against the stop step 708.

[0031] The distance between the two stop steps 708 is greater than the distance between the two outer sides of the second U-shaped ornament 704. When the first locking nut 709 is locked, the relative rotation of the first U-shaped ornament 703 and the second U-shaped ornament 704 is not affected.

[0032] In the preferred embodiment, the upper end of the anchor plate 6 is provided with multiple through holes 602, and a screw assembly 10 is provided at the through hole 602. Nuts are provided at both ends of the screw assembly 10. The first U-shaped swing member 703 is provided with mounting holes 710. The screw assembly 10 passes through the screw assembly 10 of the first pull rod 7, and the nuts of the screw assembly 10 press the first U-shaped swing member 703.

[0033] In a preferred embodiment, the embedded part 302 includes a central threaded sleeve 307 disposed within the tensioning platform 301. The central threaded sleeve 307 has second contact plates 306 at both ends. The central threaded sleeve 307 has a threaded through screw 308 inside. The through screw 308 extends out of the tensioning platform 301 at both ends. The through screw 308 has second locking nuts 309 at both ends. The first U-shaped swing member 703 of the first pull rod 7 and the second pull rod 8 abuts against the second contact plate 306. The through screw 308 passes through the first U-shaped swing member 703 and the second locking nut 309 presses against the first U-shaped swing member 703.

[0034] The second contact plate 306 is welded to the end of the central threaded sleeve 307, with a hole pre-reserved in the center through which the threaded rod 308 passes. The embedded part 302 is cast inside the tensioning platform 301, and the outer side of the second contact plate 306 is flush with the surface of the tensioning platform 301.

[0035] In a preferred embodiment, the anchor plate 6 is provided with a plurality of vertical gusset plates 603 on the side away from the cover 1.

[0036] The lacing plate 603 enhances the bending resistance of the anchor plate 6.

[0037] Example 2:

[0038] A combined tensioning and anchoring method for building rooftops:

[0039] Pull screw assembly

[0040] M18 tie rods (arranged at 300mm intervals) are used as key connecting components, penetrating through the concrete structure and anchor plate. The tensile strength of the tie rods is used to firmly anchor the anchor plate to the concrete surface, providing a basic connection force for subsequent stress.

[0041] Anchor plate and lacing plate assembly

[0042] The anchor plate is made of 200mm thick steel plate, with pre-drilled holes for prestressed steel bars according to the node requirements. The lacing plate is also made of 200mm thick steel plate and is welded perpendicularly to the anchor plate (weld leg height 8mm) to form a "anchor plate + lacing plate" combined structure. The lacing plate can effectively increase the out-of-plane toughness and bending stiffness of the anchor plate, and work together to resist the bending moment at the node, avoiding excessive local deformation of the anchor plate.

[0043] Rebar tie rod assembly

[0044] Configure Φ16 steel tie rods (tightening spacing 1200mm), one end is reasonably connected to the anchor plate or gusset plate, and the other end is anchored to a stable part of the concrete structure. Through the tie rod's binding effect, it helps to limit the displacement of the anchor plate and nodes, enhances the overall stability, and balances the lateral forces during tensioning or use.

[0045] Pre-embedded bearing angle steel

[0046] 50x5 pre-embedded bearing angle steel is used, which is embedded in a specific position in the concrete structure in advance. It works in conjunction with anchor plates and tie rods to disperse the anchoring force, optimize the stress distribution at the joints, and prevent local pressure damage to the concrete.

[0047] Anchoring foundation construction: The anchor plate is tightly connected to the concrete structure by M18 tie rods, and the pre-embedded bearing angle steel helps to disperse the pressure, forming an initial anchoring system to ensure that the anchor plate is stably attached to the concrete surface.

[0048] Bending moment resistance mechanism: When a node is subjected to bending moment, the "anchor plate + lacing plate" combined structure utilizes the bending and shear resistance of the steel plate, and the lacing plate effectively constrains the deformation of the anchor plate, converting the bending moment into the internal stress of the steel plate and transferring it to the tie rod and the concrete structure, thereby achieving bending moment resistance.

[0049] Stability enhancement: The Φ16 steel tie rods connect the anchor plate to the stable part of the concrete, limiting the lateral displacement and deformation of the anchor plate and the node, balancing the additional force generated by tension or load, and working together with the tie rods and anchor plate assemblies to improve overall stability.

[0050] Prestressing adaptation: The anchor plate has pre-drilled holes for prestressed steel bars, which can be threaded through for tensioning operations. The high strength and high toughness of the "anchor plate + tie plate" provides a reliable load-bearing foundation for the application of prestress. The tie rod and tie bolt ensure the stability of the nodes during tensioning and avoid uncontrolled deformation.

[0051] 1. Component Preparation

[0052] Standardized components are used: M18 tie rods, 200mm thick anchor plates (with pre-drilled holes for tie rods), Φ16 steel bar tie rods, and 50×5 pre-embedded bearing angle steel. Specifications and performance are checked upon arrival at the site.

[0053] 2. Anchoring foundation construction

[0054] Before pouring concrete, embed 50×5 angle steel to ensure accurate positioning; after the concrete strength reaches 70%, weld the anchor plate and the lacing plate vertically (weld leg height 8mm), and check the weld for any false welds or cracks after welding.

[0055] 3. Tensioning component installation

[0056] The tie rods pass through the anchor plate and nodes, and are pre-tightened with adjusting nuts at both ends; one end of the steel bar tie rod is connected to the anchor plate and the gusset plate, and the other end is anchored to the stable structure. The tension is adjusted according to the specified interval to reduce installation deviation.

[0057] 4. Tensioning and Calibration

[0058] Adjust the anchor plate level with a level calibrator (deviation ≤ 1°), set the tension angle with the angle adjuster and lock it; apply tension in stages (30% → 70% → 100% of the design value), hold the load for 5 minutes at each stage, monitor the stress state in real time, and avoid over-tensioning.

[0059] 5. Acceptance and Fixing

[0060] Test parameters such as screw spacing and tie rod torque. After passing the test, spot weld the adjusting nut to fix it. Fill the gap with micro-expansion mortar and cure for 7 days to ensure the joint is stably stressed.

[0061] Optimized load-bearing performance: Multi-component collaboration (tie rods, anchor plates-lacing plates, steel tie rods, etc.) significantly improves the bending moment and deformation resistance of nodes, effectively disperses stress, avoids local concrete damage, and ensures structural safety.

[0062] Construction convenience: Standardized components (such as M18 screws, Φ16 tie rods, etc.) are compatible with conventional building materials and construction processes. The design of anchor plate pre-drilled holes and welding connections simplifies the on-site installation process, reduces construction difficulty and customization requirements, and improves construction efficiency.

[0063] Wide adaptability: It can be flexibly applied to scenarios such as the connection of concrete structures and steel components, the application of prestress, and the reinforcement of complex nodes. By adjusting the component specifications and the spacing, it can be adapted to different engineering needs and has strong versatility.

[0064] Economic efficiency and environmental friendliness: Using conventional building steel, components can be reused, reducing waste of specially customized materials; the construction process is simplified, the construction period is shortened, the overall cost is reduced, and it is in line with the concept of green construction.

[0065] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A tensioning and anchoring structure for a large-span cover, characterized in that: The structure includes a column (4), with a lower crossbeam (5) and an upper crossbeam (3) at the upper end of the column (4). A support rod (2) is provided on the inner side of the upper crossbeam (3), and a tensioning platform (301) is provided on the outer side of the upper crossbeam (3). An anchor plate (6) is also provided above the tensioning platform (301). The lower end of the anchor plate (6) is attached to and connected to the outer side of the upper crossbeam (3). The upper end of the anchor plate (6) is provided with multiple prestressing tendon holes (601). The prestressing tendon (101) of the cover (1) passes through the prestressing tendon holes (601). A tensioner (9) is fitted on the prestressing tendon (101). An embedded part (302) is provided inside the tensioning platform (301). A first tie rod (7) is provided at the upper end of the embedded part (302). The upper end of the first tie rod (7) is connected to the upper end of the anchor plate (6). A second tie rod (8) is provided at the lower end of the embedded part (302). The lower end of the second tie rod (8) is connected to the lower crossbeam (5).

2. The tensioning and anchoring structure for large-span cover components according to claim 1, characterized in that: Angle steel (303) is pre-embedded at the upper corner of the upper crossbeam (3), and a first pre-embedded screw (304) is pre-embedded in the middle of the upper crossbeam (3). The first pre-embedded screw (304) is provided with a first contact plate (305) on the outer surface of the upper crossbeam (3) near the anchor plate (6), and a second contact plate (306) is also provided. One side of the second contact plate (306) is attached to the angle steel (303) and the first pre-embedded screw (304), and the anchor plate (6) is attached to the second contact plate (306). The end of the first pre-embedded screw (304) passes through the first contact plate (305), the second contact plate (306) and the anchor plate (6). The nut is sleeved on the first pre-embedded screw (304) and presses the lower end of the anchor plate (6).

3. The tensioning and anchoring structure for large-span cover components according to claim 1, characterized in that: The first pull rod (7) and the second pull rod (8) include a pull rod (701) and a swing angle assembly (702) provided at both ends of the pull rod (701). The swing angle assembly (702) includes a first U-shaped swing member (703) and a second U-shaped swing member (704) that are hinged to each other, and also provides a threaded sleeve (705). The threaded sleeve (705) is rotatably sleeved with the second U-shaped swing member (704). One end of the threaded sleeve (705) is provided with a stop cap (706), which stops on the second U-shaped swing member (704). The other end of the threaded sleeve (705) is threadedly sleeved with the pull rod (701).

4. The tensioning and anchoring structure for large-span cover components according to claim 3, characterized in that: It is also provided with a connecting shaft (707), which passes through and is sleeved on the side wall of the U-shaped mechanism of the first U-shaped ornament (703) and the second U-shaped ornament (704). Each end of the connecting shaft (707) is provided with a stop step (708), and the first locking nut (709) is sleeved on both ends of the connecting shaft (707) and the end of the first locking nut (709) abuts against the stop step (708).

5. The tensioning and anchoring structure for large-span cover components according to claim 3, characterized in that: The upper end of the anchor plate (6) is provided with multiple through holes (602), and a screw assembly (10) is provided at the through hole (602). Nuts are provided at both ends of the screw assembly (10). The first U-shaped swing piece (703) is provided with an installation hole (710). The screw assembly (10) passes through the screw assembly (10) of the first pull rod (7), and the nut of the screw assembly (10) presses the first U-shaped swing piece (703).

6. The tensioning and anchoring structure for large-span cover components according to claim 1, characterized in that: The embedded part (302) includes a central threaded sleeve (307) provided in the tensioning platform (301). The central threaded sleeve (307) has second contact plates (306) at both ends. The central threaded sleeve (307) has a threaded through screw (308) inside. The two ends of the through screw (308) extend out of the tensioning platform (301). The two ends of the through screw (308) have second locking nuts (309). The first U-shaped swing piece (703) of the first tie rod (7) and the second tie rod (8) abuts against the second contact plate (306). The through screw (308) passes through the first U-shaped swing piece (703) and the second locking nut (309) presses the first U-shaped swing piece (703).

7. The tensioning and anchoring structure for large-span cover components according to claim 1, characterized in that: The anchor plate (6) has multiple vertical gusset plates (603) on the side away from the cover (1).

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