Large-span asymmetric grid structure jacking system and construction method

Abstract

The invention provides a large-span asymmetric grid structure jacking system and a construction method, and relates to the field of building construction. The jacking system comprises a jacking mechanism and a jacking frame; the jacking frame comprises a plurality of jacking frame standard knots which are stacked in sequence, and the jacking frame is used for supporting the grid structure; each jacking mechanism comprises a jacking translation piece and a jacking assembly. The number of the jacking mechanisms is two. The jacking assembly comprises a jacking part and a jacking seat, the jacking part is arranged on the jacking translation part, and the jacking seat is arranged on the jacking part; the jacking translation piece is used for driving the jacking seat to be close to or away from the jacking frame; and after the jacking seats of the two jacking mechanisms lift the jacking frame, the newly added jacking frame standard knot moves to the lower side of the jacking frame, so that the jacking frame is lifted. The construction method has the effect of improving the construction efficiency of the large-span asymmetric grid structure.

Description

Technical Field

[0001] This application relates to the technical field of building construction, and in particular to a jacking system and construction method for a large-span asymmetric space frame structure. Background Technology

[0002] Large-span space frame structures refer to a new type of building structure that spans a space of more than 60 meters laterally. With its significant advantages such as high overall stiffness, low self-weight and flexible shape, it has been widely used in large public building projects such as stadiums and exhibition halls, effectively meeting the functional requirements of such buildings for large spaces and large spans, and has become an important choice in the field of modern large-scale building structures.

[0003] In the construction of large-span space frame structures, the full-span scaffolding method for high-altitude assembly is a commonly used construction method. This method requires first erecting a full-span scaffold on the site, and then construction workers use the scaffold to complete the assembly work of the space frame structure at high altitude. However, for large-span space frame structures, the erection process of full-span scaffolding is complex, requiring a large amount of manpower and material resources, and the erection period is long, which restricts the overall construction progress. At the same time, during the high-altitude assembly work, construction workers must be in a high-altitude environment for a long time, which poses a high risk to the work.

[0004] To improve the construction efficiency of large-span space frame structures, Chinese patent CN118007799A discloses a method for phased jacking construction of a large-span space frame dome. This method uses a jacking system to jack the space frame in stages, enabling assembly operations at different design heights, optimizing construction procedures, reducing the amount of high-altitude work for construction personnel, and improving construction efficiency. The jacking system in this method includes hydraulic cylinders and a jacking platform, which is composed of multiple standard sections. During the jacking process, the space frame is first jacked to a preset height using hydraulic cylinders. Then, standard sections are installed to raise the height of the jacking platform, ensuring reliable transfer of the space frame's weight to the jacking platform. Subsequently, the position of the hydraulic cylinders is moved to create conditions for subsequent jacking operations.

[0005] However, in the aforementioned technologies, the assembly of the standard section of the jacking frame requires hoisting the standard section to a designated high-altitude position, and the movement of the hydraulic cylinders also needs to be completed in a high-altitude environment, which increases the safety hazards for construction personnel during the construction process and affects construction efficiency. Summary of the Invention

[0006] To improve the construction efficiency of large-span asymmetric space frame structures, this application provides a jacking system and construction method for large-span asymmetric space frame structures.

[0007] Firstly, this application provides a jacking system for a large-span asymmetric space frame structure, which adopts the following technical solution:

[0008] A lifting system for a large-span asymmetric space frame structure includes a lifting mechanism and a lifting frame; The lifting frame includes multiple standard sections, which are stacked sequentially. The lifting frame is used to support the space frame structure. The lifting mechanism includes a lifting and translating component and a lifting assembly, and two lifting mechanisms are provided; The lifting assembly includes a lifting member and a lifting seat. The lifting member is disposed on the lifting translation member, and the lifting seat is disposed on the lifting member. The lifting translation member is used to drive the lifting seat to move closer to or away from the lifting frame. After the lifting seats of the two lifting mechanisms lift the lifting frame, the newly added standard section of the lifting frame moves to the lower side of the lifting frame, thereby raising the lifting frame.

[0009] By adopting the above technical solution, the lifting node of the space frame structure is installed after the top standard section of the lifting frame. The lifting seats of the two lifting mechanisms raise the lifting frame, leaving space underneath. After the lifting frame is raised, the construction workers place the newly added standard section of the lifting frame under it, allowing the lifting frame to be stacked on top of the newly added standard section. After the lifting frame is connected to the newly added standard section, a new lifting frame is formed, thereby increasing the height of the lifting frame and ultimately lifting the space frame structure.

[0010] This application uses a lifting component to drive the lifting seat to move, thereby raising the lifting frame, which facilitates increasing the height of the lifting frame and realizing the lifting of the space frame structure. It improves the construction method in the prior art, which requires construction workers to hoist the standard sections of the lifting frame to the top of the lifting frame for installation. This improves construction efficiency, reduces the amount of high-altitude work for construction workers, and reduces safety risks.

[0011] Optionally, it also includes a base frame, with the lifting frame located inside the base frame; the lifting and translating member drives the lifting seat to pass through the base frame, so that the lifting seat lifts the lifting frame inside the base frame.

[0012] By adopting the above technical solution, the base frame can restrict the movement of the lifting frame during the lifting process, thereby improving the stability of the lifting process.

[0013] Optionally, a conveying assembly may also be included; the conveying assembly is used to drive the newly added standard section of the lifting frame to move to the underside of the lifting frame.

[0014] By adopting the above technical solution, after the lifting frame is raised, the newly added standard section of the lifting frame is placed on the conveying component. The conveying component can transport the newly added standard section of the lifting frame to the lower side of the lifting frame, thereby improving the automation level of the lifting system and thus improving construction efficiency.

[0015] Optionally, the conveying assembly includes a conveyor and a conveyor frame; the conveyor frame is disposed on the conveyor, and the standard section of the lifting frame is located on the conveyor frame; the conveyor drives the conveyor frame to move, thereby moving the standard section of the lifting frame.

[0016] By adopting the above technical solution, after the standard section of the lifting frame is placed on the conveyor frame, the conveyor frame drives the conveyor frame to move, so that the conveyor frame moves the standard section of the lifting frame into the base frame, which improves the automation level of the lifting system. At the same time, the conveyor component transports the standard section of the lifting frame to the bottom of the lifting frame, reducing the amount of high-altitude work and improving construction efficiency.

[0017] Optionally, the conveyor frame is provided with a positioning groove, which is used to restrict the movement of the standard section of the lifting frame.

[0018] By adopting the above technical solution, the positioning groove on the conveyor frame can restrict the movement of the standard sections of the lifting frame, thereby improving the stability of the standard sections of the lifting frame during the conveying process. At the same time, the positioning groove facilitates the positioning of newly added standard sections of the lifting frame, ensuring that after the newly added standard sections of the lifting frame move to the underside of the lifting frame, they are correctly aligned with the lifting frame, thus improving the construction efficiency of connecting the lifting frame with the previously added standard sections of the lifting frame.

[0019] Optionally, the lifting base includes a slider, a slide rail, and a lifting plate; the slide rail is disposed on the lifting translation member, the slider is slidably connected to the slide rail, the slider is connected to the output end of the lifting member, and the lifting plate is disposed on the slider; the lifting member drives the slider to slide on the slide rail, so that the lifting plate lifts the lifting frame.

[0020] By adopting the above technical solution, the lifting component drives the sliding mechanism to slide on the slide rail, thereby lifting the lifting frame with the lifting plate. Through the cooperation of the slider and the slide rail, the stability of the lifting plate in the process of lifting the lifting frame is improved.

[0021] Optionally, one of the lifting mechanisms has a slot on its lifting plate, and the other lifting mechanism has a block on its lifting plate, with the slot and the block being inserted into each other.

[0022] By adopting the above technical solution, a plug slot is provided on the lifting plate of one lifting mechanism, and a plug block is provided on the lifting plate of the other lifting mechanism. When the two lifting plates lift the lifting frame, the plug block is located in the plug slot, which improves the integrity between the two lifting plates and thus improves the reliability of the two lifting plates lifting the lifting frame.

[0023] Secondly, this application provides a construction method for a jacking system for a large-span asymmetric space frame structure, which adopts the following technical solution: S1. Based on the design requirements, divide and determine the design elevation of the first stage of jacking and the design elevation of the second stage of jacking; and determine the location and quantity of the jacking mechanism and jacking frame; S2. Install the central area space frame structure onto the corresponding lifting mechanism. The lifting mechanism, in conjunction with the lifting frame, lifts the central area space frame structure to the first stage design elevation. During this process, the central area space frame structure is gradually expanded, causing the central area space frame structure to gradually enlarge. S3. After the central area space frame structure is lifted to the first stage design elevation, according to the design requirements, the lifting mechanism and the lifting frame at the new location are added; the part of the central area space frame structure that is further expanded is installed on the lifting mechanism at the new location, and the lifting mechanism at the new location, together with the lifting frame, lifts the expanded space frame structure to the first stage design elevation, and then connects it with the central area space frame structure; S4. Continue to lift the central area space frame structure to the design elevation of the second stage, and gradually expand it until the expansion is completed when the central area space frame structure reaches the design elevation of the second stage. S5. Synchronously adjust the lifting height of the lifting mechanism to lower the grid structure onto the support, completing the lifting. Then, dismantle the lifting mechanism and the lifting frame in sequence.

[0024] By adopting the above technical solution, the construction of the space frame structure is divided into different jacking stages according to the design requirements. During the jacking process to the design elevation of each stage, the space frame structure is gradually expanded and assembled, thus realizing a staged lifting and assembly construction method. This reduces the workload of erecting full-span scaffolding in existing technologies and improves construction efficiency.

[0025] Optionally, in step S2, when it is necessary to lift the space frame structure, the following steps are included:

[0026] First, the lifting mechanism drives the lifting seat to move, raising the lifting frame. Then, the newly added standard section of the lifting frame is placed behind the conveyor frame, and the conveyor drives the conveyor frame to move, moving the newly added standard section of the lifting frame below the lifting frame. Finally, the lifting frame and the newly added standard section of the lifting frame are connected to complete the lifting process.

[0027] By adopting the above technical solution, after the lifting component raises the lifting frame, space is left below the lifting frame. At this time, the newly added standard section of the lifting frame is placed on the conveyor frame and moved to the bottom of the lifting frame under the drive of the conveyor component, so as to connect with the lifting frame and form a lifting frame of a new height.

[0028] Optionally, in step S3, after the space frame structure that needs to be expanded is lifted to the first stage design elevation by the lifting frame at the newly added location and connected to the central area space frame structure, the lifting mechanism and the lifting frame that lifted the central area space frame structure to the first stage design elevation are removed.

[0029] By adopting the above technical solution, since the overall structure of the space frame is asymmetrical, as the central area of ​​the space frame gradually expands, its center of gravity shifts towards the side with more cantilever, causing the bending moment on the lifting frame to gradually increase, which can easily lead to safety risks. After the central area of ​​the space frame reaches the first-stage design elevation, the newly added lifting mechanism, in conjunction with the lifting frame, lifts the expanded portion to the first-stage design elevation and connects it to the central area of ​​the space frame, allowing the newly added lifting mechanism to support the central area of ​​the space frame. When the lifting mechanism and the lifting frame stably support the central area of ​​the space frame, the portion of the lifting mechanism that lifted the central area of ​​the space frame to the first-stage design elevation is removed, realizing the transfer of the lifting point of the central area of ​​the space frame, thereby ensuring the safety of the space frame structure during the lifting process.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. By setting up a lifting mechanism, the lifting nodes of the space frame structure are installed after the standard section of the lifting frame at the top of the lifting frame. The lifting seats of the two lifting mechanisms raise the lifting frame, leaving space under the lifting frame. After the lifting frame is raised, the construction workers place the newly added standard section of the lifting frame under the lifting frame, so that the lifting frame can be stacked on the newly added standard section. After the lifting frame is connected with the newly added standard section, a new lifting frame is formed, thereby increasing the height of the lifting frame and thus realizing the lifting of the space frame structure. This application uses the lifting components to drive the lifting seats to move, thereby raising the lifting frame, which facilitates increasing the height of the lifting frame and realizing the lifting of the space frame structure. It improves the construction method in the prior art, where construction workers hoist the standard section of the lifting frame to the top of the lifting frame for installation, improves construction efficiency, reduces the amount of high-altitude work for construction workers, and reduces safety risks.

[0032] 2. By setting up a conveying component, after the jacking frame is raised, the newly added standard sections of the jacking frame are placed on the conveying component. The conveying component can transport the newly added standard sections of the jacking frame to the lower side of the jacking frame, thereby improving the automation level of the jacking system and thus improving construction efficiency.

[0033] 3. By setting up a lifting seat, the lifting component is driven to slide on the slide rail, which makes the lifting plate lift the lifting frame. Through the cooperation of the slider and the slide rail, the stability of the lifting plate in the process of lifting the lifting frame is improved. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the jacking mechanism in the construction method of a large-span asymmetric space frame structure according to Embodiment 1 of this application; Figure 2 This is a schematic diagram of the standard section of the jacking frame used in the construction method of a large-span asymmetric space frame structure in Embodiment 1 of this application; Figure 3 This is a schematic diagram of the movement of hydraulic cylinders in a construction method for a large-span asymmetric space frame structure according to Embodiment 1 of this application; Figure 4 This is a schematic diagram of the overall structure of a large-span asymmetric space frame structure lifting system in Embodiment 2 of this application; Figure 5 This is a schematic diagram of the lifting mechanism and conveying components of a large-span asymmetric space frame structure lifting system according to Embodiment 2 of this application; Figure 6 This is a schematic diagram of the lifting mechanism of a large-span asymmetric space frame structure lifting system in Embodiment 2 of this application.

[0035] In the diagram: 1. Lifting mechanism; 11. Lifting and translation component; 12. Lifting assembly; 121. Lifting component; 122. Lifting seat; 1221. Slider; 1222. Slide rail; 1223. Lifting plate; 1224. Support seat; 1225. Insertion block; 1226. Insertion slot; 13. Hydraulic cylinder; 14. Lifting platform; 2. Lifting frame; 21. Standard section of lifting frame; 3. Conveying assembly; 31. Conveying component; 32. Conveying frame; 321. Positioning slot; 4. Base frame; 5. Lifting node. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0037] Example 1

[0038] Embodiment 1 of this application provides a construction method for a large-span asymmetric space frame structure, including the following steps: S1. Based on the design requirements, divide and determine the design elevation of the first stage of jacking and the design elevation of the second stage of jacking; and determine the position and quantity of jacking mechanism 1 and jacking frame 2; S2. Install the central area space frame structure onto the corresponding lifting mechanism 1. The lifting mechanism 1, in conjunction with the lifting frame 2, lifts the central area space frame structure to the first stage lifting design elevation. During this process, the central area space frame structure gradually expands and enlarges. S3. After the central area space frame structure is lifted to the first stage design elevation, according to the design requirements, the lifting mechanism 1 and the lifting frame 2 are added at a new location; the part of the central area space frame structure that is further expanded is installed on the lifting mechanism 1 at the new location, and the lifting mechanism 1 at the new location, together with the lifting frame 2, lifts the expanded space frame structure to the first stage design elevation, and then connects it with the central area space frame structure; S4. Continue to lift the central area space frame structure to the design elevation of the second stage, and gradually expand it until the expansion is completed when the central area space frame structure reaches the design elevation of the second stage. S5. Synchronously adjust the lifting height of the lifting mechanism 1 so that the grid structure falls onto the support, completing the lifting. Then, dismantle the lifting mechanism 1 and the lifting frame 2 in sequence.

[0039] Among them, such as Figure 1 As shown, in this embodiment 1, the lifting mechanism 1 includes a hydraulic cylinder 13 and a lifting platform 14. The lifting frame 2 is formed by stacking multiple standard lifting frame sections 21 sequentially, and adjacent standard lifting frame sections 21 are connected by bolts. The body of the hydraulic cylinder 13 is connected to the standard lifting frame section 21 by bolts for easy disassembly. The lifting platform 14 is fixedly connected to the output end of the hydraulic cylinder 13 by bolts. The lifting platform 14 is used to install the lifting node 5 of the grid structure.

[0040] like Figure 1 and Figure 2 As shown, when it is necessary to increase the height of the lifting frame 2 to lift the space frame structure, the lifting platform 14 is first lifted by the hydraulic cylinder 13, thereby raising the lifting node 5 and lifting the space frame structure. Then, a newly added standard section 21 of the lifting frame is installed at the top of the lifting frame 2 to form a new lifting frame 2. At this time, the new lifting frame 2 can support the lifting platform 14. The standard section 21 of the lifting frame can be spliced ​​onto the lifting frame 2 during installation.

[0041] like Figure 2 and Figure 3 As shown, when it is necessary to continue lifting the grid structure, the hydraulic cylinder 13 is moved to the designated position and connected to the lifting frame 2. The output end of the hydraulic cylinder 13 is fixedly connected to the lifting platform 14, so that the hydraulic cylinder 13 can drive the lifting platform 14 to move away from the lifting frame 2, thereby facilitating the addition of new standard sections 21 of the lifting frame and increasing the height of the lifting frame 2.

[0042] When jacking the central area space frame structure to the first-stage design elevation, the central area space frame structure is first installed on the corresponding jacking mechanism 1 and jacking frame 2 through jacking node 5, and then gradually jacked to the first-stage design elevation. During the jacking process, the central area space frame structure is gradually expanded according to the design requirements, so that the central area space frame structure is gradually enlarged.

[0043] After the central area space frame structure is lifted to the first stage design elevation, due to the asymmetrical structure of the overall space frame structure, as the central area space frame structure gradually expands, the center of gravity of the central area space frame structure shifts to the side with more cantilever, resulting in a gradual increase in the bending moment on the lifting frame 2, which is prone to safety risks.

[0044] Therefore, after the central area space frame structure is jacked to the first-stage design elevation, a new jacking mechanism 1 is added according to the design requirements. The newly added jacking mechanism 1, in conjunction with the jacking frame 2, jacks the expanded section to the first-stage design elevation and connects it to the central area space frame structure. This allows the newly added jacking mechanism 1 to support the central area space frame structure. At this point, the portion of the jacking mechanism 1 used to jack the central area space frame structure to the first-stage design elevation is removed, realizing the transfer of the jacking point of the central area space frame structure, thereby ensuring the safety of the space frame structure during the jacking process.

[0045] During the process of the central area space frame structure being jacked up to the second stage design elevation, the central area space frame structure continued to expand and be completed when it reached the second stage design elevation.

[0046] After the overall assembly of the space frame structure is completed, the stroke of the hydraulic cylinder 13 is adjusted synchronously to lower the entire space frame structure onto the support, thus completing the jacking operation.

[0047] After the space frame structure is lowered onto the support, the lifting mechanism 1 and the lifting frame 2 are dismantled in sequence according to the design requirements, ensuring that the deflection of the space frame structure meets the design requirements during the dismantling process.

[0048] Example 2 Embodiment 2 of this application provides a lifting system for a large-span asymmetric space frame structure.

[0049] like Figure 4 As shown, the lifting system includes a lifting mechanism 1, a lifting frame 2, a conveying assembly 3, and a base frame 4. The lifting frame 2 comprises multiple standard lifting frame sections 21, which are stacked sequentially and connected to adjacent sections by bolts. The top of the lifting frame 2 is used to fix and install the lifting node 5 of the space frame structure. The lifting frame 2 is located within the base frame 4. In this embodiment 2, the lifting system has two lifting mechanisms 1.

[0050] like Figure 4 and Figure 5As shown, the conveying assembly 3 includes a conveying component 31 and a conveying frame 32. In this embodiment 2, the conveying component 31 is a linear module. The output end of the conveying component 31 is fixedly connected to the conveying frame 32. The base frame 4 is fixedly installed on the body of the conveying component 31. The conveying component 31 can drive the conveying frame 32 to move in the horizontal direction, so that the conveying component 31 moves into the base frame 4.

[0051] like Figure 6 As shown, the lifting mechanism 1 includes a lifting and translating component 11 and a lifting assembly 12. The lifting assembly 12 includes a lifting component 121 and a lifting seat 122. The lifting seat 122 includes a slider 1221, a slide rail 1222, a lifting plate 1223, and a support base 1224. In this embodiment 2, the lifting component 121 is a hydraulic cylinder, and the lifting and translating component 11 is a linear module. The output end of the lifting and translating component 11 is fixedly connected to the support base 1224, and the lifting and translating component 11 can drive the support base 1224 to move horizontally. The body of the lifting component 121 is fixedly connected to the support base 1224, the output end of the lifting component 121 is fixedly connected to the slider 1221, the slide rail 1222 is fixedly connected to the support base 1224, the slider 1221 is slidably connected to the slide rail 1222, and the lifting plate 1223 is fixedly connected to the slider 1221. The lifting member 121 drives the slider 1221 to slide on the slide rail 1222, so that the lifting plate 1223 can move in the vertical direction.

[0052] It should be noted that during the lifting process of the space frame structure, the lifting node 5 of the space frame structure is installed at the top of the lifting frame 2. By increasing the height of the lifting frame 2, the lifting of the space frame structure is achieved.

[0053] When it is necessary to increase the height of the lifting frame 2 within the base frame 4, the lifting and translating components 11 of the two lifting mechanisms 1 simultaneously drive the corresponding support seats 1224 to move closer to the lifting frame 2, so that the lifting plate 1223 extends into the base frame 4 and is positioned below the lifting frame 2. Then, the lifting component 121 drives the slider 1221 to move, causing the two lifting plates 1223 to raise the lifting frame 2 to a specified height.

[0054] After the lifting frame 2 is raised to the designated height, the construction workers place the standard section 21 of the lifting frame on the conveyor frame 32. The conveyor 31 drives the conveyor frame 32 to move into the base frame 4, so that the standard section 21 of the lifting frame moves into the base frame 4 and is directly below the lifting frame 2. At this time, the lifting frame 2 is connected to the newly added standard section 21 of the lifting frame with bolts to form a new lifting frame 2, thereby increasing the height of the lifting frame 2 and thus realizing the lifting of the space frame structure.

[0055] Meanwhile, during the lifting process of the lifting frame 2, the base frame 4 can restrict the movement of the lifting frame 2, thereby providing stability for the lifting process.

[0056] In addition, after the new lifting frame 2 is assembled, the lifting plate 1223 can further adjust the height of the top of the lifting frame 2 from the ground by lifting the lifting frame 2, so as to more accurately lift the space frame structure to the design elevation.

[0057] The jacking system in Embodiment 2 of this application, through the cooperation of the jacking and translating component 11, the jacking assembly 12, and the conveying assembly 3, improves the automation level of the assembly of the jacking frame 2, thereby increasing construction efficiency. Simultaneously, the jacking frame 2 splicing components are assembled from the lower side of the jacking frame 2, reducing the workload of hoisting the standard jacking frame section 21 and the high-altitude work of construction personnel in the prior art, reducing construction risks, and further improving construction efficiency.

[0058] like Figure 6 As shown, the lifting plate 1223 of the first lifting mechanism 1 is provided with a insertion slot 1226, and the lifting plate 1223 of the other lifting mechanism 1 is fixedly connected with a insertion block 1225. When the two lifting plates 1223 lift the lifting frame 2, the insertion block 1225 is inserted into the insertion slot 1226, which improves the integrity between the two lifting plates 1223, thereby improving the reliability of the two lifting plates 1223 in lifting the lifting frame 2.

[0059] like Figure 5 As shown, the conveyor frame 32 is provided with a positioning groove 321. The size of the positioning groove 321 is adapted to the foot of the lifting frame standard section 21. The positioning groove 321 can restrict the movement of the lifting frame standard section 21, thereby improving the stability of the lifting frame standard section 21 during the conveying process. At the same time, the positioning groove 321 facilitates the positioning of newly added lifting frame standard sections 21, so that after the newly added lifting frame standard section 21 moves to the lower side of the lifting frame 2, it is correctly aligned with the lifting frame 2, thereby improving the construction efficiency of connecting the lifting frame 2 with the previously added lifting frame standard sections 21.

[0060] The implementation principle of the large-span asymmetric space frame structure jacking system in Embodiment 2 of this application is as follows: When it is necessary to lift the grid structure, the lifting and translation components 11 of the two lifting mechanisms 1 drive the support base 1224 to move toward the direction of the lifting frame 2, so that the two lifting plates 1223 are located on the lower side of the lifting frame 2.

[0061] Then, the lifting component 121 drives the lifting plate 1223 to move, and the lifting frame 2 rises to a specified height under the lifting of the two lifting plates 1223. At this time, the conveying component 31 drives the conveying frame 32 to move, so that the standard section 21 of the lifting frame moves into the base frame 4 and is directly below the lifting frame 2.

[0062] After the standard section 21 of the lifting frame is directly below the lifting frame 2, the lifting frame 2 is connected to the newly added standard section 21 of the lifting frame, thereby increasing the height of the lifting frame 2 and forming a new lifting frame 2, thus realizing the lifting of the space frame structure.

[0063] Example 3 Embodiment 3 of this application provides a construction method for a large-span asymmetric space frame structure, using the jacking system in Embodiment 2, including the following steps: First, based on the design requirements, determine the design elevation of the first stage of jacking and the design elevation of the second stage of jacking, as well as the number and location of jacking mechanism 1.

[0064] When jacking the central area space frame structure to the first-stage design elevation, the central area space frame structure is first installed on the corresponding jacking mechanism 1 and jacking frame 2 through jacking node 5, and then gradually jacked to the first-stage design elevation. During the jacking process, the central area space frame structure is gradually expanded according to the design requirements, so that the central area space frame structure is gradually enlarged.

[0065] After the central area space frame structure is lifted to the first stage design elevation, due to the asymmetrical structure of the overall space frame structure, as the central area space frame structure gradually expands, the center of gravity of the central area space frame structure shifts to the side with more cantilever, resulting in a gradual increase in the bending moment on the lifting frame 2, which is prone to safety risks.

[0066] Therefore, after the central area space frame structure is jacked to the first-stage design elevation, a new jacking mechanism 1 is added according to the design requirements. The newly added jacking mechanism 1, in conjunction with the jacking frame 2, jacks the expanded section to the first-stage design elevation and connects it to the central area space frame structure. This allows the newly added jacking mechanism 1 to support the central area space frame structure. At this point, the portion of the jacking mechanism 1 used to jack the central area space frame structure to the first-stage design elevation is removed, realizing the transfer of the jacking point of the central area space frame structure, thereby ensuring the safety of the space frame structure during the jacking process.

[0067] During the jacking of the space frame structure, the first jacking frame standard section 21 is first moved into the base frame 4 using the conveying assembly 3. Then, the jacking and translation components 11 of the two jacking mechanisms 1 drive the support base 1224 to move closer to the first jacking frame standard section 21, so that the two lifting plates 1223 are positioned below the first jacking frame standard section 21. Then, the jacking component 121 drives the lifting plates 1223 to lift the first jacking frame standard section 21 to the designated height. At the same time, the construction personnel install the jacking node 5 of the space frame structure on the first jacking frame standard section 21.

[0068] Next, the construction workers placed the second lifting frame standard section 21 on the conveyor frame 32. Driven by the conveyor 31, the second lifting frame standard section 21 moved into the base frame 4 and was positioned directly below the first lifting frame standard section 21. The first lifting frame standard section 21 and the second lifting frame standard section 21 were connected by bolts to form the lifting frame 2, thereby realizing the lifting of the grid structure.

[0069] After the jacking point is moved, the central area space frame structure continues to be jacked up to the design elevation of the second stage. During this process, the central area space frame structure continues to expand and is completed when it reaches the design elevation of the second stage.

[0070] After the space frame structure is assembled, the lifting mechanism 1 slowly lowers the space frame structure onto the supports. During the descent of the space frame structure to the supports, the lifting component 121 can precisely control the descent stroke, improving the accuracy of the construction.

[0071] After the space frame structure is lowered onto the support, the lifting mechanism 1 and the lifting frame 2 are dismantled in sequence according to the design requirements, ensuring that the deflection of the space frame structure meets the design requirements during the dismantling process.

[0072] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A jacking system for a large-span asymmetric space frame structure, characterized in that, Includes a lifting mechanism (1) and a lifting frame (2); The lifting frame (2) includes multiple standard sections (21) of the lifting frame, which are stacked sequentially. The lifting frame (2) is used to support the space frame structure. The lifting mechanism (1) includes a lifting and translation component (11) and a lifting assembly (12), and there are two lifting mechanisms (1); The lifting assembly (12) includes a lifting member (121) and a lifting seat (122). The lifting member (121) is mounted on the lifting translation member (11), and the lifting seat (122) is mounted on the lifting member (121). The lifting translation member (11) is used to drive the lifting seat (122) to move closer to or away from the lifting frame (2). After the lifting seats (122) of the two lifting mechanisms (1) lift the lifting frame (2), the newly added standard section (21) of the lifting frame moves to the lower side of the lifting frame (2), thereby raising the lifting frame (2).

2. The jacking system for a large-span asymmetric space frame structure according to claim 1, characterized in that, It also includes a base frame (4), and the lifting frame (2) is located inside the base frame (4); the lifting and translating component (11) drives the lifting seat (122) to pass into the base frame (4), so that the lifting seat (122) lifts the lifting frame (2) inside the base frame (4).

3. The jacking system for a large-span asymmetric space frame structure according to claim 2, characterized in that, It also includes a conveying assembly (3); the conveying assembly (3) is used to drive the newly added standard section (21) of the lifting frame to the underside of the lifting frame (2).

4. The jacking system for a large-span asymmetric space frame structure according to claim 3, characterized in that, The conveying assembly (3) includes a conveying component (31) and a conveying frame (32); the conveying frame (32) is disposed on the conveying component (31), and the standard section (21) of the lifting frame is located on the conveying frame (32); the conveying component (31) drives the conveying frame (32) to move, thereby moving the standard section (21) of the lifting frame.

5. The jacking system for a large-span asymmetric space frame structure according to claim 4, characterized in that, The conveyor frame (32) is provided with a positioning groove (321), which is used to restrict the movement of the standard section (21) of the lifting frame.

6. The jacking system for a large-span asymmetric space frame structure according to claim 1, characterized in that, The lifting base (122) includes a slider (1221), a slide rail (1222), and a lifting plate (1223); the slide rail (1222) is disposed on the lifting translation member (11), the slider (1221) is slidably connected to the slide rail (1222), the slider (1221) is connected to the output end of the lifting member (121), and the lifting plate (1223) is disposed on the slider (1221); the lifting member (121) drives the slider (1221) to slide on the slide rail (1222), so that the lifting plate (1223) lifts the lifting frame (2).

7. The jacking system for a large-span asymmetric space frame structure according to claim 6, characterized in that, One of the lifting mechanisms (1) has a lifting plate (1223) with a insertion slot (1226) and the other lifting mechanism (1) has a lifting plate (1223) with a insertion block (1225). The insertion slot (1226) is inserted into the insertion block (1225).

8. A construction method for a large-span asymmetric space frame structure, characterized in that, Includes the following steps: S1. Based on the design requirements, divide and determine the design elevation of the first stage of jacking and the design elevation of the second stage of jacking; and determine the position and quantity of the jacking mechanism (1) and the jacking frame (2); S2. Install the central area grid structure onto the corresponding lifting mechanism (1). The lifting mechanism (1) cooperates with the lifting frame (2) to lift the central area grid structure to the design elevation of the first stage. During this process, the central area grid structure is gradually expanded and enlarged. S3. After the central area space frame structure is lifted to the first stage design elevation, according to the design requirements, the lifting mechanism (1) and the lifting frame (2) at the new position are added; the part of the central area space frame structure that is further expanded is installed on the lifting mechanism (1) at the new position, and the lifting mechanism (1) at the new position, together with the lifting frame (2), lifts the expanded space frame structure to the first stage design elevation, and then connects it with the central area space frame structure; S4. Continue to lift the central area space frame structure to the design elevation of the second stage, and gradually expand it until the expansion is completed when the central area space frame structure reaches the design elevation of the second stage. S5. Synchronously adjust the lifting height of the lifting mechanism (1) so that the grid structure falls onto the support to complete the lifting. Then, dismantle the lifting mechanism (1) and the lifting frame (2) in sequence.

9. The construction method for a large-span asymmetric space frame structure according to claim 8, characterized in that, In step S2, when it is necessary to lift the space frame structure, the following steps are included: First, the lifting unit (121) drives the lifting seat (122) to move, thereby raising the lifting frame (2). Then, the newly added standard section (21) of the lifting frame is placed behind the conveyor frame (32), and the conveyor unit (31) drives the conveyor frame (32) to move, thereby moving the newly added standard section (21) of the lifting frame to the bottom of the lifting frame (2). Finally, the lifting frame (2) and the newly added standard section (21) of the lifting frame are connected to complete the lifting.

10. The construction method for a large-span asymmetric space frame structure according to claim 8, characterized in that, In step S3, after the expanded space frame structure is lifted to the first stage design elevation by the newly added lifting frame (2) and connected to the central area space frame structure, the lifting mechanism (1) and the lifting frame (2) that lifted the central area space frame structure to the first stage design elevation are removed.

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