Adjustable span for precise hoisting and assembling of special-shaped ring corridor steel structure and application method thereof
By using an adjustable steel structure docking auxiliary device during the hoisting of the irregular-shaped ring corridor steel structure, the displacement and elevation deviation of the steel beams can be monitored and dynamically adjusted in real time, solving the splicing accuracy problem caused by prestressing tension and improving construction efficiency and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA GEZHOUBA (GRP) FIRST ENG CO LTD
- Filing Date
- 2026-02-02
- Publication Date
- 2026-05-29
AI Technical Summary
During the hoisting of irregularly shaped ring corridor steel structures in large public buildings, the displacement, settlement, torsion, and elevation changes of the steel frame caused by prestressing tension make it difficult to guarantee the splicing accuracy. Traditional hoisting methods cannot compensate for dynamic displacement in real time and lack efficient monitoring methods, which affects construction efficiency and safety.
An adjustable steel structure docking auxiliary device is adopted, including a clamping plate body, an upper adjustment plate, a lower adjustment plate and high-strength bolts. Through real-time monitoring and dynamic adjustment, the displacement and elevation deviation of the steel beam are compensated to achieve precise docking.
It enables high-precision adjustment and real-time monitoring of steel beams in the vertical direction, improving splicing accuracy and structural safety, and reducing construction costs and time.
Smart Images
Figure CN122106277A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of steel structure construction, specifically a method for adjusting the span and its application in the precise hoisting and assembly of irregularly shaped ring corridor steel structures. Background Technology
[0002] In large public building projects (such as exhibition halls, art centers, and stadiums), to meet unique architectural and spatial functional requirements (such as a spiraling visual effect or large-span column-free spaces), large-span, irregularly shaped steel-concrete hybrid structures are often used for circular corridors. These structures typically comprise two core components: First, the prestressed beams (steel-concrete composite beams) inside the main structure are prestressed through post-tensioning (single-end or double-end tensioning) to improve load-bearing capacity and spanning capacity; however, during the tensioning process, the steel inside the prestressed beam will undergo slight deformation, displacement or elevation adjustment (such as local settlement, torsion or offset) due to the redistribution of internal forces.
[0003] Secondly, there is a spiraling, cantilevered steel-framed corridor structure on the periphery, which is connected to the main prestressed beam through steel fracture beams. One side of the steel fracture beam cantilevered to form the main body of the corridor, while the other side was embedded in the prestressed beam to form a steel-concrete composite load-bearing system. The corridor spirals upward with the main structure, and the elevation of each section of steel frame is not at the same level. The splicing accuracy requirements are extremely high (it needs to be precisely aligned with the steel frame inside the prestressed beam).
[0004] In the aforementioned structural system, the steel-framed beam typically requires two hoisting operations: first, the steel skeleton inside the prestressed beam is hoisted and concrete is poured to form the main load-bearing structure; then, the cantilevered steel skeleton of the outer ring corridor is hoisted and spliced with the steel skeleton inside the prestressed beam using the steel-framed beam. However, due to the displacement of the steel skeleton caused by prestressing tension (such as offset, settlement, and torsion) and the difference in steel skeleton elevation caused by the spiral rise of the ring corridor, traditional hoisting methods face the following technical challenges during splicing: Splicing accuracy is difficult to guarantee: the actual position of the steel frame after prestressing tensioning deviates from the design position (such as vertical offset of more than ±5mm, angular deflection of more than ±1°), while the steel frame beam and the steel frame inside the prestressed beam need to be strictly aligned (such as the gap between the bevel butt end faces ≤2mm). The traditional method of relying on manual measurement and experience adjustment cannot compensate for dynamic displacement in real time, which can easily lead to splicing misalignment, uneven stress, or even structural safety hazards.
[0005] Poor adaptability to multiple elevations and irregular structures: The spiral ascent of the corridor causes non-linear changes in the elevation of each section of steel frame (such as a height difference of 300mm to 800mm between adjacent nodes), and the steel frame beams need to adapt to different inclination angles and spatial postures. Traditional fixed hoisting fixtures cannot flexibly adjust the vertical / horizontal position, and the support frame or jig needs to be repeatedly adjusted, which is inefficient and costly.
[0006] Lack of real-time monitoring of dynamic deformation: There is no real-time feedback on the changes in internal forces and displacement response of the steel frame during prestressing tensioning. Construction personnel cannot accurately grasp the actual state of the splicing nodes (such as stress concentration areas and offset trends), making it difficult to simultaneously optimize adjustment strategies during hoisting.
[0007] To address some of the aforementioned issues, existing technical solutions (such as CN110258774A and CN112160608A) have proposed a series of solutions. For example, CN110258774A divides the high-altitude ring corridor into multiple installation segments (e.g., 6 segments). A tower crane is used to hoist some segments (e.g., segments 2, 4, and 6) to the rooftop of the high-rise building for fixation. Simultaneously, the remaining segments (e.g., segments 1, 3, and 5) are assembled on the ground and then hydraulically lifted to the air as a whole. This significantly optimizes the segmented installation strategy and hoisting method of the high-altitude ring corridor, reducing the cost and construction risk of erecting support frames at heights of 100 meters. CN112160608A divides the ring corridor into 6 construction segments. Some segments are assembled on rooftop formwork and lowered to the supports, while others are assembled on basement formwork and then lifted as a whole. Through segmented lifting technology and optimized formwork support, the safety issues of traditional overall lifting are resolved, and the construction period is shortened.
[0008] However, the above solutions mainly focus on the overall installation strategy of the ring corridor (such as segmented hoisting, frame support, and optimization of lifting process). Although they have reduced the difficulty of high-altitude installation or improved construction safety to some extent, none of them have designed special adjustment devices to address the high-precision alignment problem in the steel splicing process (especially the prestress deformation compensation and spiral elevation difference adaptation). As a result, the irregular ring corridor steel frame cannot be accurately positioned in actual hoisting due to displacement accumulation and elevation deviation, which seriously affects the overall structural stress performance and construction efficiency.
[0009] Therefore, there is an urgent need for a hoisting and assembly adjustment device and method that can adjust the vertical position of the steel frame, compensate for prestressing tension deformation, and adapt to the differences in elevation of the spiral ascent. Summary of the Invention
[0010] The purpose of this invention is to provide an adjustable span for precise hoisting and assembly of irregularly shaped ring corridor steel structures and its application method, so as to solve the problems of low steel splicing accuracy and inability to dynamically compensate for displacement caused by the difference between prestressed tension deformation and spiral elevation in the prior art.
[0011] To achieve the above objectives, the present invention provides the following technical solution: an adjustable span for precise hoisting and assembly of irregularly shaped ring corridor steel structures. The adjustable span is configured as an adjustable steel structure docking auxiliary device. This steel structure docking auxiliary device is set at the key splicing node position during the segmented hoisting of steel frame beams and is used to connect the prestressed embedded steel beams and the ring corridor steel beams to achieve relative position adjustment and alignment of the prestressed embedded steel beams and the ring corridor steel beams in the vertical direction. The steel structure docking auxiliary device includes a clamping plate body, an upper adjusting plate, a lower adjusting plate, and fasteners. The upper adjusting plate and the lower adjusting plate are fixedly connected to the docking surfaces of the prestressed embedded steel beams and the ring corridor steel beams in the vertical direction, respectively. The upper adjusting plate and the lower adjusting plate are arranged in a mirror symmetrical manner, and each has multiple screw holes for connection. The clamping plate body is a rigid connecting base plate with an overall rectangular structure. The clamping plate body has an installation slot or limiting slot in the middle that matches the upper adjusting plate and the lower adjusting plate for positioning and connection.
[0012] Preferably, the outer side of the clamp body is provided with a long, waist-shaped hole for fasteners to pass through and for longitudinal displacement adjustment.
[0013] Preferably, the fasteners include matching high-strength bolts and nuts. The high-strength bolts pass through the long adjustment holes and are connected to the bolt holes on the upper or lower adjustment plates. By tightening the nuts, the upper adjustment plate, the clamping plate body, the lower adjustment plate, and the corresponding steel beam can be pressed and fixed, thereby realizing the fine adjustment, locking, and precise docking of the steel beam in the vertical direction.
[0014] Preferably, a mating surface is provided at the close joint position between the prestressed embedded steel beam and the ring corridor steel beam, and the mating surface is a beveled mating end face or a matching end face.
[0015] Preferably, both the upper and lower adjustment plates are made of steel plates, and their surfaces are perpendicular to the mating surfaces of the corresponding steel beams (prestressed embedded steel beams, corridor steel beams).
[0016] Preferably, anti-slip pads are provided between the inner side of the clamping plate body and the upper and lower adjustment plates to prevent the steel beam from slipping or deforming during the adjustment process, while improving the rigidity and stability of the overall structure.
[0017] Preferably, the upper and lower adjustment plates are also provided with replaceable wear-resistant liners on the end faces that contact the steel beam. The wear-resistant liners are made of high-strength alloy or wear-resistant non-metallic materials, and their surfaces are processed with anti-slip textures or toothed structures to increase the friction with the surface of the steel beam and prevent the steel beam from slipping during adjustment. The wear-resistant liners are detachably connected to the upper or lower adjustment plates through quick-release connectors (such as countersunk screws, clips, or slot structures).
[0018] Preferably, the clamping plate body and the upper and lower adjustment plates are also equipped with sensor mounting positions for installing displacement sensors, inclinometers and strain gauges to monitor in real time the displacement, elevation deviation, angle deflection and stress change of the prestressed beam during the splicing and adjustment process of the steel beam; the sensor is connected to an external intelligent control unit to form an intelligent monitoring system, thereby realizing dynamic perception and feedback of the steel beam connection accuracy and structural stress state, and improving the construction controllability, safety and accuracy during the hoisting and splicing process.
[0019] An application method for precise hoisting and assembly of irregularly shaped ring corridor steel structures using the above-mentioned adjustable span includes the following steps: S1: Hoist and fix the prestressed embedded steel beams. Hoist the prestressed embedded steel beams inside the main structure of the irregular ring corridor steel structure to the predetermined installation node of the main structure according to the design position, and fix them in place by temporary support or fixing measures. Then, pour concrete at the design position of the prestressed embedded steel beams to make them form an integral whole with the main structure, as a fixed main foundation for subsequent steel splicing. S2: Prestressing tensioning is carried out. After the prestressed embedded steel beam is fixed and poured, prestressing tensioning is performed on it. The tensioning operation generates pre-compression or pre-tension stress inside the prestressed steel beam to achieve the design prestress value. During the tensioning process, the prestressed steel beam will experience slight displacement, settlement, deflection or elevation changes due to internal forces. S3: Hoist the steel beams of the ring corridor to the splicing nodes. After the prestressing tensioning is completed and stabilized, hoist the steel beams of the ring corridor into sections according to the design to the key splicing node positions adjacent to the prestressed embedded steel beams, so that the two are in a state of proximity but not yet fully connected, reserving adjustment space for subsequent precise connection by adjusting the span. S4: Install the adjustment span. Install the adjustment span at the splicing node of the prestressed embedded steel beam and the ring corridor steel beam. Make the upper adjustment plate in the adjustment span fit and fix to the mating surface of the prestressed embedded steel beam, and the lower adjustment plate fit and fix to the mating surface of the ring corridor steel beam. The upper and lower adjustment plates are set in a mirror symmetrical manner and are positioned and connected through the installation slot or limit slot on the main body of the clamp. S5: Preliminary connection and adjustment preparation. Insert high-strength bolts through the long, waist-shaped holes on the outside of the clamping plate body to initially connect the upper or lower adjustment plate to the clamping plate body, but do not tighten the nuts, so that the adjustment span is in a fine-tunable state, providing adjustment margin for subsequent precise adjustment. S6: Real-time monitoring and dynamic adjustment. Displacement sensors, inclinometers, and strain gauges are installed at the sensor mounting positions in the adjustment span and connected to an external intelligent control unit. Real-time monitoring is performed on the vertical displacement between steel beams, elevation deviation, angular deflection of the joint surfaces of the two steel beams, and stress state changes of the prestressed beams after tensioning. Based on the monitoring data, the relative position between the upper and lower adjustment plates is finely adjusted in real time by adjusting the position of the high-strength bolts in the long waist-shaped holes. This compensates for steel beam displacement, settlement, or torsion caused by prestressing tensioning, and achieves precise vertical alignment of the steel beams. S7: Locking and final fixing: After the displacement, elevation and angle of the steel beams meet the design accuracy requirements, gradually tighten the nuts on the high-strength bolts to press and fix the upper adjusting plate, the main body of the clamping plate, the lower adjusting plate and the corresponding steel beams, so as to achieve final locking and precise docking between the steel beams and form a stable steel structure connection node. S8: Monitoring, feedback and acceptance. After locking is completed, the stress and deformation status of the splicing nodes can be continuously monitored through sensors to ensure the stability of the structure under subsequent construction loads, and also serve as the basis for construction quality acceptance.
[0020] Compared with existing technologies, the present invention has the following beneficial effects: By setting an adjustable span and applying it to the prestressing tension-induced steel frame displacement compensation and high-precision docking stage during the hoisting and splicing of large-span irregular-shaped ring corridor steel structures, the present invention employs a closed-loop construction process: first fixing the main steel frame → actively triggering prestressing deformation → then dynamically compensating for displacement through the adjustable span. This enables high-precision adjustment of the steel beam in the vertical direction, real-time monitoring of displacement / elevation / angle deviations and prestressed beam stress state, and dynamic compensation for deformation caused by prestressing tension. It effectively addresses the challenges of prestressing tension, spiral ascent with multiple elevation differences, and complex irregular-shaped structure splicing, meeting the requirements for high-precision docking, structural safety and reliability, and improved construction efficiency in the construction of large-span irregular-shaped ring corridor steel structures. Specific technical effects include the following: 1. By combining the main body of the clamping plate, the upper / lower adjustment plates, and the long waist-shaped holes with high-strength bolts, an adjustable mechanical structure is constructed that can precisely adjust the vertical position of the steel beam, realizing the fine adjustment, locking and precise docking of the steel beam in the vertical direction.
[0021] 2. By deeply integrating with the prestressing tensioning process, a closed-loop process is formed, which first fixes the main steel frame → actively thixotropic → dynamically adjusts, and compensates for the steel frame displacement caused by tensioning in real time. This breaks through the limitations of traditional static prefabrication + passive adjustment and significantly improves the steel frame splicing accuracy and structural stress coordination.
[0022] 3. By integrating sensors into the adjusting span, the displacement of the steel frame, elevation deviation, angle deflection and stress state of the prestressed beam are monitored in real time, forming a dynamic feedback and precise control mechanism. At the same time, the durability and maintenance convenience of the adjusting span are enhanced by wear-resistant lining plates and quick-release structures. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.
[0024] Figure 1 This is a three-dimensional structural schematic diagram of the steel structure docking auxiliary device (adjusting span) in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the planar structure of the steel structure docking auxiliary device (adjusting span) in Embodiment 1 of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of the structure of A in the middle; Figure 4 This is a schematic diagram illustrating the application of the present invention; Figure 5 This is a flowchart of the application method of the present invention.
[0025] In the picture: 1. Prestressed embedded steel beam; 2. Ring corridor steel beam; 3. Steel structure docking auxiliary device; 301. Clamping plate main body; 302. Upper adjusting plate; 303. Lower adjusting plate; 304. Fasteners; 4. Dating surface. Detailed Implementation
[0026] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.
[0027] As attached Figure 1 To be continued Figure 4 As shown: Example 1: This invention provides an adjustable span for precise hoisting and assembly of irregularly shaped ring corridor steel structures. The adjustable span is configured as an adjustable steel structure docking auxiliary device 3. This steel structure docking auxiliary device 3 is set at the key splicing node position during the segmented hoisting of steel frame beams and is used to connect the prestressed embedded steel beam 1 and the ring corridor steel beam 2 to realize the relative position adjustment and alignment of the prestressed embedded steel beam 1 and the ring corridor steel beam 2 in the vertical direction. The steel structure docking auxiliary device 3 includes a clamping plate body 301, an upper adjusting plate 302, a lower adjusting plate 303, and fasteners 304. The upper adjusting plate 302 and the lower adjusting plate 303 are fixedly connected to the vertical mating surfaces 4 of the prestressed embedded steel beam 1 and the ring corridor steel beam 2, respectively. The upper adjusting plate 302 and the lower adjusting plate 303 are arranged in a mirror symmetrical manner, and each of them has multiple screw holes for connection. The clamping plate body 301 is a rigid connecting base plate with a rectangular structure. The clamping plate body 301 has an installation slot or limiting slot in the middle that is adapted to the upper adjusting plate 302 and the lower adjusting plate 303, which is used to realize the positioning and connection of the upper adjusting plate 302 and the lower adjusting plate 303.
[0028] 1. In one embodiment of the present invention, the outer side of the clamp body 301 is provided with an elongated waist-shaped hole for fasteners 304 to pass through and realize longitudinal displacement adjustment.
[0029] 2. In one embodiment of the present invention, the fastener 304 includes a matching high-strength bolt and nut. The high-strength bolt passes through the long adjustment hole and is connected to the bolt hole on the upper adjustment plate 302 or the lower adjustment plate 303. By tightening the nut, the upper adjustment plate 302, the clamping plate body 301, the lower adjustment plate 303 and the corresponding steel beam can be pressed and fixed, thereby realizing the fine adjustment, locking and precise docking of the steel beam in the vertical direction.
[0030] 3. In one embodiment of the present invention, a mating surface 4 is provided at the close joint position of the prestressed embedded steel beam 1 and the ring corridor steel beam 2. The mating surface 4 is a beveled mating end face or a matching end face.
[0031] 4. In one embodiment of the present invention, both the upper adjusting plate 302 and the lower adjusting plate 303 are made of steel plates, and their plate surfaces are perpendicular to the docking end surfaces of the corresponding steel beams (prestressed embedded steel beam 1 and ring corridor steel beam 2).
[0032] 5. In one embodiment of the present invention, an anti-slip pad (not shown in the figure) is also provided between the inner side of the clamping plate body 301 and the upper adjusting plate 302 and the lower adjusting plate 303 to prevent the steel beam from slipping or deforming locally during the adjustment process, while improving the rigidity and stability of the overall structure.
[0033] 6. In one embodiment of the present invention, the upper adjusting plate 302 and the lower adjusting plate 303 are further provided with replaceable wear-resistant liners (not shown in the figure) on the end faces that contact the steel beam. The wear-resistant liners are made of high-strength alloy or wear-resistant non-metallic materials, and their surfaces are processed with anti-slip textures or toothed structures to increase the friction with the surface of the steel beam and prevent the steel beam from slipping during adjustment. The wear-resistant liners are detachably connected to the upper adjusting plate 302 or the lower adjusting plate 303 through quick-release connectors (such as countersunk screws, buckles or slot structures).
[0034] Working Principle: Example 1 provides a device for precise vertical adjustment and docking of steel beams in a special-shaped corridor steel structure, based on adjustable clamps, high-strength bolts, anti-slip and wear-resistant contact surfaces, and beveled precision docking surfaces 4. It connects the upper adjusting plate 302 and the lower adjusting plate 303 to the prestressed embedded steel beam 1 and the corridor steel beam 2 respectively. The device utilizes the long, narrow holes on the clamp body 301 combined with high-strength bolts to achieve fine-tuning, locking, and precise alignment of the steel beams in the vertical direction. Simultaneously, the use of anti-slip pads and replaceable wear-resistant liners enhances structural stability and anti-slip capability of the contact surfaces during adjustment. Furthermore, the docking ends of the prestressed embedded steel beam 1 and the corridor steel beam 2 employ beveled docking surfaces or matching surfaces, providing a structural foundation for high-precision splicing. This embodiment can address issues such as steel beam displacement, elevation deviation, and insufficient docking accuracy caused by prestressing tension, spiral ascent, and multiple elevation differences during the hoisting and splicing process of large-span irregular-shaped ring corridor steel structures. It achieves millimeter-level precise docking, stable connection, and stress coordination of steel beams under complex working conditions, significantly improving construction accuracy, structural safety, and engineering efficiency.
[0035] Example 2: This example is basically the same as the previous example, except that the main body 301 of the clamping plate, the upper adjustment plate 302, and the lower adjustment plate 303 are also provided with sensor mounting positions for installing displacement sensors, inclinometers, and strain gauges to monitor the displacement, elevation deviation, angle deflection, and stress changes of the prestressed beam in real time during the splicing and adjustment process of the steel beam. The sensor is connected to an external intelligent control unit to form an intelligent monitoring system, thereby realizing dynamic perception and feedback of the steel beam connection accuracy and structural stress state, and improving the construction controllability, safety, and accuracy during the hoisting and splicing process.
[0036] Working principle: As provided in Example 1, a vertical precision docking device for steel beams based on an adjustable clamping plate structure and a high-strength bolt fine-tuning mechanism can effectively solve the problems of steel beam displacement and docking deviation caused by prestressing tension and hoisting errors. However, in actual complex construction environments, it is difficult to perceive the actual displacement state, elevation deviation and structural stress changes of the steel beam in real time by relying solely on mechanical adjustment, which has certain blind adjustment and safety risks. To further enhance the visualization, controllability, and intelligence of the steel beam splicing process, Embodiment 2, based on Embodiment 1, adds sensor mounting positions to the main body 301 of the clamping plate and the upper and lower adjustment plates 303. These positions are used to install displacement sensors, inclinometers, and strain gauges. These sensors can collect real-time data on the displacement, elevation deviation, and angle deflection of the steel beam during splicing and adjustment, while simultaneously monitoring the strain changes of the prestressed beam under tension and stress. The sensors are connected to an external intelligent control unit (such as a PLC or industrial computer) to form an intelligent monitoring system, thereby achieving dynamic perception, real-time feedback, and precise control of the steel beam splicing accuracy and structural stress state, effectively improving the construction controllability, safety, and overall accuracy during the hoisting and splicing process.
[0037] As attached Figure 5 As shown: A method for precise hoisting and assembly of irregularly shaped ring corridor steel structures using the adjustable span described in Embodiments 1 and 2 above includes the following steps: S1: Hoist and fix the prestressed embedded steel beam 1. Hoist the prestressed embedded steel beam 1 inside the main structure of the irregular ring corridor steel structure to the predetermined installation node of the main structure according to the design position, and fix it in place by temporary support or fixing measures; then, pour concrete at the design position of the prestressed embedded steel beam 1 to make it form an integral whole with the main structure, as a fixed main foundation for subsequent steel splicing; S2: Perform prestressing tensioning. After the prestressed embedded steel beam 1 is fixed and poured, perform prestressing tensioning on it. Through the tensioning operation, pre-compression or pre-tension stress is generated inside the prestressed steel beam to achieve the design prestress value. During the tensioning process, the prestressed steel beam will experience slight displacement, settlement, deflection or elevation changes due to the internal forces. S3: Hoist the steel beam 2 of the ring corridor to the splicing node. After the prestressing tensioning operation is completed and stabilized, hoist the steel beam 2 of the ring corridor into sections according to the design to the key splicing node position adjacent to the prestressed embedded steel beam 1, so that the two are in a state of proximity but not yet fully connected, reserving adjustment space for subsequent precise connection by adjusting the span. S4: Install the adjustment span. Install the adjustment span at the splicing node between the prestressed embedded steel beam 1 and the ring corridor steel beam 2, so that the upper adjustment plate 302 in the adjustment span is attached and fixed to the mating surface 4 of the prestressed embedded steel beam 1, and the lower adjustment plate 303 is attached and fixed to the mating surface 4 of the ring corridor steel beam 2; the upper adjustment plate 302 and the lower adjustment plate 303 are arranged in a mirror symmetrical manner, and the positioning connection is achieved through the installation slot or limit slot on the clamp body 301; S5: Preliminary connection and adjustment preparation. Through the long, waist-shaped hole on the outside of the clamping plate body 301, high-strength bolts are inserted to initially connect the upper adjusting plate 302 or the lower adjusting plate 303 to the clamping plate body 301, but the nuts are not tightened, so that the adjusting span is in a fine-adjustable state, providing adjustment margin for subsequent precise adjustment. S6: Real-time monitoring and dynamic adjustment. Displacement sensors, inclinometers, and strain gauges are installed at the sensor mounting positions in the adjustment span and connected to an external intelligent control unit to monitor in real time: vertical displacement between steel beams, elevation deviation, angular deflection of the joint surface 4 of the two steel beams, and stress state changes of the prestressed beam after tensioning. Based on the monitoring data, the relative position between the upper adjustment plate 302 and the lower adjustment plate 303 is finely adjusted in real time by adjusting the position of the high-strength bolts in the long waist-shaped holes, thereby compensating for steel beam displacement, settlement, or torsion caused by prestressing tensioning and achieving precise vertical alignment of the steel beam. S7: Locking and final fixing: After the displacement, elevation and angle of the steel beam meet the design accuracy requirements, gradually tighten the nuts on the high-strength bolts to press and fix the upper adjusting plate 302, the clamping plate body 301, the lower adjusting plate 303 and the corresponding steel beam, so as to achieve final locking and precise docking between the steel beams and form a stable steel structure connection node. S8: Monitoring, feedback and acceptance. After locking is completed, the stress and deformation status of the splicing nodes can be continuously monitored through sensors to ensure the stability of the structure under subsequent construction loads, and also serve as the basis for construction quality acceptance.
[0038] The above method provides an application method for precise hoisting and assembly of irregularly shaped ring corridor steel structures using the adjustable span described in Embodiment 1 or Embodiment 2. It involves first hoisting and fixing the prestressed embedded steel beam 1 and implementing prestressing tension, then hoisting the ring corridor steel beam 2 to the splicing node, followed by installing the adjustable span and performing real-time monitoring and dynamic adjustment. This ultimately achieves a closed-loop process for precise vertical docking and locking of the steel beams, effectively solving problems such as steel beam displacement, elevation deviation, and insufficient docking accuracy caused by prestressing tension, spiral ascent, and multiple elevation differences. This method supports dual adjustment modes of mechanical fine-tuning and intelligent sensing, allowing selection of either a basic adjustable span or an intelligent adjustable span integrating sensors and an intelligent control system according to project requirements. This significantly improves the construction accuracy, structural safety, and project controllability of large-span irregularly shaped ring corridor steel structures in complex hoisting environments, representing a key technological path for achieving precise assembly and dynamic control.
[0039] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. An adjustable span for precise hoisting and assembly of irregularly shaped ring corridor steel structure, wherein the adjustable span is configured as an adjustable steel structure docking auxiliary device (3), the steel structure docking auxiliary device (3) is set at the key splicing node position during the segmented hoisting of steel fracture beams, and is used to connect the prestressed embedded steel beams (1) and the ring corridor steel beams (2), so as to realize the relative position adjustment and alignment of the prestressed embedded steel beams (1) and the ring corridor steel beams (2) in the vertical direction, characterized in that: The steel structure docking auxiliary device (3) includes a clamping plate body (301), an upper adjusting plate (302), a lower adjusting plate (303), and fasteners (304). The upper adjusting plate (302) and the lower adjusting plate (303) are fixedly connected to the docking surfaces (4) of the prestressed embedded steel beam (1) and the ring corridor steel beam (2) in the vertical direction, respectively. The upper adjusting plate (302) and the lower adjusting plate (303) are arranged in a mirror symmetrical manner, and multiple screw holes for connection are opened on them. The clamping plate body (301) is a rigid connecting base plate, and its overall structure is rectangular. The clamping plate body (301) has an installation slot or limiting slot in the middle that is compatible with the upper adjusting plate (302) and the lower adjusting plate (303) for positioning and connection of the upper adjusting plate (302) and the lower adjusting plate (303).
2. The adjustable span for precise hoisting and assembly of irregularly shaped ring corridor steel structures according to claim 1, characterized in that: The outer side of the clamp body (301) is provided with a long, waist-shaped hole for fasteners (304) to pass through and achieve longitudinal displacement adjustment.
3. The adjustable span for precise hoisting and assembly of irregularly shaped ring corridor steel structures according to claim 1, characterized in that: The fastener (304) includes a matching high-strength bolt and nut, the high-strength bolt passing through a long adjustment hole and connected to a bolt hole on the upper adjustment plate (302) or the lower adjustment plate (303).
4. The adjustable span for precise hoisting and assembly of irregularly shaped ring corridor steel structures according to claim 1, characterized in that: The prestressed embedded steel beam (1) and the ring corridor steel beam (2) are provided with a docking surface (4), which is a bevel docking end face or a matching end face.
5. The adjustable span for precise hoisting and assembly of irregularly shaped ring corridor steel structures according to claim 1, characterized in that: Both the upper adjustment plate (302) and the lower adjustment plate (303) are made of steel plates, and their surfaces are perpendicular to the mating surfaces of the corresponding prestressed embedded steel beams (1) and the ring corridor steel beams (2).
6. The adjustable span for precise hoisting and assembly of irregularly shaped ring corridor steel structures according to claim 1, characterized in that: Anti-slip pads are also provided between the inner side of the clamp body (301) and the upper adjustment plate (302) and the lower adjustment plate (303).
7. The adjustable span for precise hoisting and assembly of irregularly shaped ring corridor steel structures according to claim 1, characterized in that: The upper adjusting plate (302) and the lower adjusting plate (303) are also provided with replaceable wear-resistant liners on the end faces that contact the steel beam.
8. The adjustable span for precise hoisting and assembly of irregularly shaped ring corridor steel structures according to claim 1, characterized in that: The clamping plate body (301), upper adjusting plate (302), and lower adjusting plate (303) are also provided with sensor mounting positions for mounting displacement sensors, inclinometers, and strain gauges.
9. A method for precisely hoisting and assembling irregularly shaped ring corridor steel structures using the adjustable span described in any one of claims 1-8, comprising the following steps: S1: Hoist and fix the prestressed embedded steel beam (1). Hoist the prestressed embedded steel beam (1) inside the main structure of the irregular ring corridor steel structure to the predetermined installation node of the main structure according to the design position, and fix it in place by temporary support or fixing measures. Then, pour concrete at the design position of the prestressed embedded steel beam (1) to make it form an integral whole with the main structure, as the fixed main foundation for subsequent steel splicing. S2: Perform prestressing tensioning. After the prestressed embedded steel beam (1) is fixed and poured, perform prestressing tensioning on it. Through tensioning, pre-compression or pre-tension stress is generated inside the prestressed steel beam to achieve the designed prestress value. During the tensioning process, the prestressed steel beam will experience slight displacement, settlement, deflection or elevation changes due to internal forces. S3: Hoist the ring corridor steel beam (2) to the splicing node. After the prestressing tensioning operation is completed and stabilized, hoist the ring corridor steel beam (2) into sections according to the design to the key splicing node position adjacent to the prestressed embedded steel beam (1), so that the two are in a state of proximity but not yet fully connected, reserving adjustment space for subsequent precise connection by adjusting the span. S4: Install the adjustment span. Install the adjustment span at the splicing node of the prestressed embedded steel beam (1) and the ring corridor steel beam (2), so that the upper adjustment plate (302) in the adjustment span is attached and fixed to the mating surface (4) of the prestressed embedded steel beam (1), and the lower adjustment plate (303) is attached and fixed to the mating surface (4) of the ring corridor steel beam (2); the upper adjustment plate (302) and the lower adjustment plate (303) are set in a mirror symmetrical manner, and the positioning connection is achieved through the installation slot or limit slot on the clamp body (301); S5: Preliminary connection and adjustment preparation. Through the long waist-shaped hole on the outside of the clamp body (301), high-strength bolts are inserted to make preliminary connection between the upper adjustment plate (302) or the lower adjustment plate (303) and the clamp body (301), but the nuts are not tightened so that the adjustment span is in a fine-tunable state. S6: Real-time monitoring and dynamic adjustment. Displacement sensors, inclinometers and strain gauges are installed at the sensor mounting positions of the adjustment span and connected to an external intelligent control unit. Real-time monitoring is performed on the vertical displacement between steel beams, elevation deviation, angle deflection of the two steel beam joint surfaces (4), and stress state changes of the prestressed beam after tensioning. Based on the monitoring data, the relative position between the upper adjustment plate (302) and the lower adjustment plate (303) is adjusted in real time by turning the position of the high-strength bolts in the long waist-shaped holes. This compensates for steel beam displacement, settlement or torsion caused by prestressing tensioning, and achieves precise alignment of the steel beam in the vertical direction. S7: Locking and final fixing: After the displacement, elevation and angle of the steel beam meet the design accuracy requirements, gradually tighten the nuts on the high-strength bolts to press and fix the upper adjustment plate (302), the main body of the clamping plate (301), the lower adjustment plate (303) and the corresponding steel beam, so as to achieve final locking and precise docking between the steel beams and form a stable steel structure connection node. S8: Monitoring, feedback and acceptance. After locking is completed, the stress and deformation status of the splicing nodes are continuously monitored through sensors.