Limited space large-span structure multi-point grading jacking structure and construction method

Abstract

The invention provides a limited space large-span structure multi-point grading jacking structure and a construction method. The limited space large-span structure multi-point grading jacking structure comprises a steel support. The steel structures are arranged on the steel supports, and the back shore frame is arranged between the two steel supports; the sectional type jig frame structure is arranged on the top supporting frame and used for supporting the top supporting frame and the steel structure; the inclined supporting rod is arranged on one side of the jig frame structure and used for supporting the jig frame structure; the back shore structure is arranged on the jig frame structure; the jacking structure comprises a supporting square steel pipe, a steel plate base arranged at the top of the supporting square steel pipe, a jacking device arranged on the top face of the steel plate base and stress supporting pieces symmetrically arranged at the two ends of the jacking device. The safety and the reliability of jacking operation are improved, the device can be suitable for various unforeseen circumstances, and the high efficiency and the high stability of the jacking process are ensured.

Description

Technical Field

[0001] The invention relates to a multi-point graded jacking structure with a large span structure in a limited space and a construction method. Background Art

[0002] Steel structure buildings have been widely used in high-rise buildings, long-span bridges, stadiums and other fields. Their application range is gradually expanding due to the excellent performance of steel materials, the high degree of industrialization of production and installation, the ability to achieve special shapes that traditional buildings cannot achieve, and the characteristics of "light weight, good earthquake resistance, good durability, large span, energy saving and environmental protection, and good economy" compared with traditional brick-concrete structures and reinforced concrete structures.

[0003] However, in recent years, some large-span spatial structures in various regions have decreased their bearing capacity, increased deformation, and reduced safety due to fatigue performance or corrosion of steel after reaching a certain service life. Therefore, designing a jacking structure with strong bearing capacity and high safety is the research direction of this invention. Summary of the invention

[0004] The present invention provides a multi-point graded jacking structure for a large-span structure in a limited space and a construction method, which can effectively solve the above-mentioned problems.

[0005] The present invention is achieved in that:

[0006] A multi-point graded jacking structure for a large-span structure in a limited space and a construction method thereof, comprising:

[0007] Steel bracket; a steel structure arranged on the steel bracket, and a top support frame arranged between the two steel brackets;

[0008] A segmented tire frame structure provided on the top support frame, which is used to support the top support frame and the steel structure;

[0009] An oblique support rod provided on one side of the tire frame structure, used to support the tire frame structure;

[0010] A top support structure is arranged on the tire frame structure; the top support structure includes a supporting square steel pipe, a steel plate base arranged on the top of the supporting square steel pipe, a jacking device arranged on the top surface of the steel plate base, stress support members symmetrically arranged at both ends of the jacking device, a support seat arranged at one end of the jacking device and on the top surface of one of the stress support members, and a semicircular groove formed on the support seat;

[0011] The tire frame structure supports the top support frame and the steel structure, and the inclined support rod supports the tire frame structure to keep the tire frame structure stable. At the same time, the stress support member and the support seat at one end of the jacking device are connected and fixed to the top support frame. During jacking, the jacking device drives the top support frame and the steel structure to move upward.

[0012] As a further improvement, the tire frame structure includes a plurality of steel pipe columns, a plurality of square steel pipes arranged in sequence on the steel pipe columns, a plurality of angle steel support frames arranged between the square steel pipes, a pad arranged on one of the square steel pipes, angle steel beams symmetrically arranged on both sides of the steel pipe columns, and diagonal angle steels arranged between the angle steel beams.

[0013] As a further improvement, the oblique support rod includes a connecting seat, a connecting piece arranged on the top surface of the connecting seat and connected to the oblique support rod, and a first bolt symmetrically arranged on the connecting seat.

[0014] As a further improvement, the stress support member includes stiffening ribs and stress frames symmetrically arranged on the stiffening ribs; the stiffening ribs are sleeved on the outer periphery of the cylinder in the jacking device to keep the cylinder stable, and the piston rod connected to the cylinder is connected to another group of stress support members to support the jacking frame.

[0015] As a further improvement, a rubber pad is provided on the semicircular groove, and a center rod for inserting the top support frame is provided in the middle of the semicircular groove.

[0016] As a further improvement, the oil cylinder and the piston rod also include a stable buffer structure; the stable buffer structure includes a first ring plate and a second ring plate, a positioning rod and an emergency limit clamp arranged between the first ring plate and the second ring plate, a compression spring sleeved on the outer periphery of the positioning rod, and a limit contact ring arranged at one end of the positioning rod.

[0017] As a further improvement, the emergency limit clamp includes a first plate and a second plate movably connected, a first pivot seat arranged on a side of the second plate, a first connecting rod movably arranged between the two first pivot seats, a third pivot seat arranged on the second ring plate, and a second connecting rod movably arranged between the two third pivot seats; when the second ring plate and the first ring plate are subjected to force, the second connecting rod drives the limit plate to fit the outer wall of the piston rod, and the first plate and the second plate make the same movement as the second connecting rod, so that the first pivot seat and the first connecting rod further strengthen the fit between the limit plate and the piston rod.

[0018] As a further improvement, the piston rod also includes a positioning support structure; the positioning support structure includes a sleeve plate, support positioning plates symmetrically arranged on both sides of the sleeve plate, a triangular plate arranged at the other end of the support positioning plate, a first seat body arranged at one end of the support positioning plate, a positioning clamping rod arranged in the middle of the first seat body, a second seat body arranged between the positioning clamping rods, reserved grooves formed at both ends of the second seat body, a second bolt arranged in the reserved groove, and an arched opening formed in the middle of the second seat body.

[0019] As a further improvement, the two side surfaces of the supporting positioning plate are respectively provided with a first rod and a second rod, and a third bolt is connected with the first rod and the second rod.

[0020] The present invention further provides a method for constructing a multi-point graded jacking structure of a large-span structure in a limited space, comprising the following steps:

[0021] S1. Conduct a construction site survey, clarify the construction scope and requirements, clean up the construction site, and build a safe construction platform and support;

[0022] S2. Install the steel support on the foundation to ensure that it is stable and can bear the weight of the subsequent structure;

[0023] S3, building the steel structure on the steel support;

[0024] S4. Subsequently, several of the steel pipe columns are connected by the mounting seat, the square steel pipe is welded to the steel pipe column, and the angle steel support frame is welded to the square steel pipe, so as to improve the strength of the steel pipe column;

[0025] S5. When the height requirement needs to be met, the multi-stage tire frame structure is stacked in sequence, so that the top support structure can support the steel structure and the top support frame;

[0026] S6. When the tire frame structure is stacked, the support seat in the top support structure is connected to the cross bar in the top support frame, and the semicircular groove and the center rod limit the cross bar, so that the cross bar is fixed at the center position of the support seat through the center rod. At the same time, the rubber pad in the semicircular groove increases the friction between the cross bar and the semicircular groove, further improving the stability;

[0027] S7. When the height of the steel structure and the top support frame needs to be further adjusted, the oil cylinder and the piston rod in the top support structure drive the support seat to move upward, thereby accurately adjusting the height of the steel structure and the top support frame;

[0028] S8. Thus, the steel structure and the top support frame can be stably supported, and the steel structure and the top support frame can also be further adjusted.

[0029] The beneficial effects of the present invention are:

[0030] (1) The present invention improves the stability and safety of the jacking process through the jacking structure. Through the carefully designed multiple components, such as steel brackets, steel structures, jacking frames, segmented tire frame structures, inclined support rods, jacking structures and stress support members, the structure can achieve multi-point graded jacking of large-span structures in a limited space. In particular, the design of the center rod directly contacting the semicircular groove reduces energy loss and improves jacking efficiency. In addition, due to the uniform distribution of the center position, it helps to resist lateral forces and maintain the stability and safety of the jacking process. Overall, the design of this structure optimizes the force transmission path, reduces local stress concentration, and improves the bearing capacity and durability of the structure.

[0031] (2) When an emergency situation occurs where the piston rod is forced to descend rapidly due to external pressure, the stable buffer structure of the present invention can effectively limit the descending speed of the piston rod, thereby protecting the structure from damage and avoiding the occurrence of safety accidents. Specifically, the rapid response and linkage mechanism of the emergency limit clamp can act in time when the piston rod is impacted, and the descent of the piston rod can be slowed down or prevented by the fit between the limit plate and the outer wall of the piston rod. This design significantly improves the safety and reliability of the jacking structure in the face of emergencies.

[0032] (3) The present invention adopts the design of the positioning support structure, especially the coordinated effect of the components such as the sleeve plate, the support positioning plate, the triangle plate, the first seat body, the positioning clamping rod, the second seat body, the reserved groove, the second bolt and the arched mouth. When the weight of the steel structure and the top support frame exceeds the bearing strength of the stress support and the support seat or becomes unstable due to external forces, the structure can provide additional support and stability. This design effectively prevents excessive movement or tilting of the steel structure and the top support frame, ensures the safety of the jacking process and the integrity of the structure, thereby improving the reliability of the entire jacking structure and the safety of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a front view of the first embodiment of the present invention.

[0035] Figure 2 It is a schematic diagram of the tire frame structure in embodiment 1 of the present invention.

[0036] Figure 3 It is a left view of the tire frame structure in embodiment 1 of the present invention.

[0037] Figure 4 It is a schematic diagram of the top support structure in the first embodiment of the present invention.

[0038] Figure 5 It is a schematic diagram of the jacking of the top support structure in the first embodiment of the present invention.

[0039] Figure 6 It is a schematic diagram of a stable buffer structure in the second embodiment of the present invention.

[0040] Figure 7 It is a schematic diagram of the emergency limit clamping member in the second embodiment of the present invention.

[0041] Figure 8 It is a schematic diagram of the third embodiment of the present invention.

[0042] Fig. 9 It is a schematic diagram of the positioning support structure in the third embodiment of the present invention.

[0043] Description of Figure Numbers:

[0044] 1. Steel support; 2. Steel structure; 3. Top support frame;

[0045] 4. Tire frame structure; 40. Steel pipe column; 41. Square steel pipe; 42. Angle steel support frame; 43. Mounting seat; 44. Pad; 45. Angle steel beam; 46. Cable-stayed angle steel;

[0046] 5. oblique support rod; 50. connecting seat; 51. connecting piece; 52. first bolt;

[0047] 6. Top support structure; 60. Supporting square steel pipe; 61. Steel plate base; 62. Stiffening ribs; 63. Stress frame; 67. Oil cylinder; 68. Piston rod; 680. Support seat; 681. Semicircular groove; 682. Rubber pad; 683. Center rod;

[0048] 7. Stable buffer structure; 70. First ring plate; 71. Second ring plate; 72. Positioning rod; 73. Compression spring; 74. Limit contact ring; 75. Emergency limit clamp; 750. First plate; 751. Second plate; 752. First pivot seat; 753. First connecting rod; 755. Third pivot seat; 756. Second connecting rod; 758. Limit plate; 76. Reinforcement rod; 77. Bending portion;

[0049] 8. Positioning support structure; 80. Set plate; 81. Support positioning plate; 810. First seat body; 811. Positioning clamping rod; 812. Second seat body; 813. Reserved groove; 814. Second bolt; 815. Arched mouth; 82. Triangular plate; 83. First rod; 84. Second rod; 85. Third bolt. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0051] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0052] Embodiment 1

[0053] Reference Figure 1-5 A multi-point graded jacking structure for a large-span structure in a limited space includes a steel support 1; a steel structure 2 arranged on the steel support 1, and a jacking frame 3 arranged between two steel supports 1.

[0054] The segmented frame structure 4 arranged on the top support frame 3 is used to support the top support frame 3 and the steel structure 2; the frame structure 4 includes a plurality of steel pipe columns 40, a plurality of square steel pipes 41 arranged on the steel pipe columns 40 in sequence, a plurality of angle steel support frames 42 arranged between the square steel pipes 41, and a cushion block 44 arranged on one of the square steel pipes 41. The cushion block 44 can ensure that the top support structure 6 is more stably installed on the frame structure 4. The angle steel beams 45 are symmetrically arranged on both sides of the steel pipe columns 40, and the diagonal angle steels 46 are arranged between the angle steel beams 45.

[0055] The oblique support rod 5 is arranged on one side of the tire frame structure 4, which is used to support the tire frame structure 4; the oblique support rod 5 includes a connecting seat 50, a connecting piece 51 arranged on the top surface of the connecting seat 50 and connected to the oblique support rod 5, and a first bolt 52 symmetrically arranged on the connecting seat 50.

[0056] Among them, the oblique support rod 5 can be telescopic or integrated; further, the oblique support rod 5 is connected and fixed to the tire frame structure 4, and can provide the tire frame structure 4 with a multi-point synchronous lifting support force, thereby ensuring the stability of the tire frame structure 4.

[0057] A supporting structure 6 is arranged on the tire frame structure 4; the supporting structure 6 includes a supporting square steel pipe 60, a steel plate base 61 arranged on the top of the supporting square steel pipe 60, a jacking device arranged on the top surface of the steel plate base 61, stress support members symmetrically arranged at both ends of the jacking device, a support seat 680 arranged at one end of the jacking device and on the top surface of one of the stress support members, and a semicircular groove 681 formed on the support seat 680; further, a rubber pad 682 is arranged on the semicircular groove 681, and a center rod 683 for plugging in the supporting frame 3 is arranged in the middle of the semicircular groove 681. It should be noted that the center rod 683 set in the middle position of the semicircular groove 681 allows the center rod 683 to directly contact the semicircular groove 681, which can more effectively transmit the jacking force. The direct transmission of force reduces energy loss and improves the jacking efficiency. At the same time, the center position provides better stability because the center rod 683 can be evenly distributed in the center of the semicircular groove 681, which helps to resist the lateral force that may be encountered during the jacking process. Furthermore, if the center rod 683 is set in the center of the semicircular groove, it will be more stable and less likely to shift or tilt during the jacking process, which helps to maintain the smooth and safe jacking process, and also helps to optimize stress distribution and reduce local stress concentration, thereby improving the bearing capacity and durability of the structure.

[0058] Among them, the stress support members include stiffening ribs 62 and stress frames 63 symmetrically arranged on the stiffening ribs 62; the stiffening ribs 62 are sleeved on the outer periphery of the cylinder 67 in the jacking device to keep the cylinder 67 stable, and the piston rod 68 connected to the cylinder 67 is connected to another set of stress support members to support the jacking frame 3.

[0059] Furthermore, there is an angle B between the stress rack 63 and the steel plate base 61, wherein 30≤B≤90 degrees. This is to ensure that the stress rack 63 can effectively support the stiffening rib 62. In one embodiment, B is approximately 45 degrees. The advantage of such a setting is that the dynamic stability of the structure can be improved, especially when lateral forces may be encountered during the jacking process. The obliquely arranged stress rack 63 can provide a better force transmission path, so that the jacking force acts more directly on the jacking frame 3, thereby improving the jacking efficiency.

[0060] Furthermore, in order to adapt to different lifting conditions and construction requirements, the stress rack 63 in this case can also be set to be angle-adjustable. This design allows construction personnel to adjust the angle of the stress rack 63 according to actual conditions to achieve the best lifting effect and construction convenience. The adjustable angle stress rack 63 provides greater flexibility. It should be noted that the specific implementation needs to be set according to the application scenario and application conditions.

[0061] Working principle:

[0062] First, the steel supports 1 provide a solid foundation for the entire structure, and the steel structure 2 is installed on these supports, ready to withstand the forces during the jacking process. The top support frame 3 is located between the two steel supports and serves as the main support point during the jacking process. The segmented tire frame structure 4 is installed on the top support frame and is composed of steel pipe columns 40, square steel pipes 41, angle steel support frames 42, pads 44, angle steel beams 45 and inclined angle steels 46 to form a stable support frame. This frame not only supports the top support frame 3 and the steel structure 2, but also further improves the stability of the overall structure through the reinforcement of the inclined support rods 5. The top support structure 6 is the core of the jacking process. It is installed on the tire frame structure 4, including supporting square steel pipes 60, steel plate base 61 and jacking devices. The cylinder 67 and piston rod 68 in the jacking device are retracted and extended during jacking. The stability of the cylinder 67 during the jacking process is ensured by the stabilizing effect of stress supports including stiffening ribs 62 and stress frames 63. The piston rod 68 is connected to another set of stress supports. These supports support the top support frame 3 so that the jacking force can be effectively transmitted to the steel structure 2. During the jacking process, the jacking device is started and the piston rod 6 8 pushes the top support frame 3 and the steel structure 2 to move upward. The rubber pad 682 and the center rod 683 on the semicircular groove 681 ensure that the top support frame 3 is stably plugged in during the jacking process to prevent sliding or instability. The stable buffer structure 7 includes a first ring plate 70, a second ring plate 71, a positioning rod 72, an emergency limit clamp 75, a compression spring 73 and a limit contact ring 74, which provide additional stability and buffering for the jacking process to ensure the smoothness and safety of the jacking process. When the emergency limit clamp 75 is subjected to force, Through the synergistic effect of the first plate 750 and the second plate 751 and the first connecting rod 753 and the second connecting rod 756, the fit between the limit plate 758 and the piston rod 68 is strengthened to further ensure the safety during the jacking process. The positioning support structure 8 includes a sleeve plate 80, a support positioning plate 81, a triangular plate 82, a first seat body 810, a positioning clamping rod 811, a second seat body 812, a reserved groove 813, a second bolt 814 and an arched mouth 815 to ensure accurate positioning and stability after jacking. The design of the entire system allows multi-point graded jacking of large-span structures in a limited space, while ensuring the stability and safety of the jacking process. It is suitable for projects that require precise jacking, such as bridges and large building structures. The design of this structure allows multi-point graded jacking in a complex environment, while ensuring the stability and safety of the jacking process.

[0063] Embodiment 2

[0064] A multi-point graded jacking structure for a large-span structure in a limited space.

[0065] When the steel structure 2 and the top support frame 3 are compressed by external forces and the piston rod 68 drops rapidly, refer to Figure 6-7 The oil cylinder 67 and the piston rod 68 also include a stable buffer structure 7; the stable buffer structure 7 includes a first ring plate 70 and a second ring plate 71, a positioning rod 72 and an emergency limit clamp 75 arranged between the first ring plate 70 and the second ring plate 71, a compression spring 73 sleeved on the outer periphery of the positioning rod 72, and a limit contact ring 74 arranged at one end of the positioning rod 72.

[0066] The emergency limit clamp 75 includes a first plate 750 and a second plate 751 that are movably connected, a first pivot seat 752 arranged on a side of the second plate 751, a first connecting rod 753 movably arranged between the two first pivot seats 752, a third pivot seat 755 arranged on the second ring plate 71, and a second connecting rod 756 movably arranged between the two third pivot seats 755; when the second ring plate 71 and the first ring plate 70 are subjected to force, the second connecting rod 756 drives the limit plate 758 to fit the outer wall of the piston rod 68, and the first plate 750 and the second plate 751 make the same movement as the second connecting rod 756, so that the first pivot seat 752 and the first connecting rod 753 further strengthen the fit between the limit plate 758 and the piston rod 68.

[0067] It should be noted that since the connection structure formed by the third pivot seat 755 and the second connecting rod 756 is symmetrically arranged on the limit plate 758, when the first ring plate 70 is subjected to force, it will move downward directly and cause the connection structure to drive the limit plate 758 to fit toward the piston rod 68. In order to ensure the strength of the connection structure, the first pivot seat 752 and the first connecting rod 753 on the first plate 750 and the second plate 751 are also connected to the limit plate 758. When the connection structure is bent, the movable first plate 750 and the second plate 751 also drive the first pivot seat 752 and the first connecting rod 753 to fit toward the piston rod 68. Furthermore, the other two ends of the first plate 750 and the second plate 751 are movably connected to the first ring plate 70 and the second ring plate 71 (not shown in the figure), thereby forming a linkage effect.

[0068] Working principle:

[0069] The first ring plate 70 and the second ring plate 71 are respectively installed at both ends of the piston rod 68, which provide basic support for the entire stable buffer structure. The first ring plate 70 and the second ring plate 71 are connected by a positioning rod 72 to form a closed annular structure to ensure the stability of the piston rod 68 during the jacking process. The positioning rod 72 is located between the first ring plate 70 and the second ring plate 71. Its function is to fix the emergency limit clamp 75 and maintain its position. The positioning rod 72 also interacts with the compression spring 73 to provide a pre-tightening force for the piston rod to ensure close contact between the piston rod 68 and the first ring plate 70 and the second ring plate 71 during the jacking process. The emergency limit clamp 75 is composed of a first plate 750, a second plate 751, a first pivot seat 752, a first connecting rod 753, a third pivot seat 755 and a second connecting rod 756. During normal jacking, the emergency limit clamp 75 is tightly connected to the piston rod 68. The emergency limit clamp 75 remains in a relaxed state. When the piston rod 68 is pressed by external force and drops rapidly, the emergency limit clamp 75 responds quickly. The first plate 750 and the second plate 751 drive the limit plate 758 to fit the outer wall of the piston rod 68 through the linkage of the first connecting rod 753 and the second connecting rod 756, thereby limiting the descending speed of the piston rod 68. The compression spring 73 is sleeved on the outer periphery of the positioning rod 72 to provide a pre-tightening force for the piston rod 68. During the jacking process, the cylinder 67 provides power through the hydraulic system to push the piston rod 68 upward, thereby driving the jacking structure to rise. The compression spring 73 in the stable buffer structure 7 provides buffering to absorb impact and vibration during the jacking process. This design ensures that during the jacking process, even if there is sudden external pressure, the jacking structure can respond quickly to avoid possible structural damage or safety accidents. In summary, these components work together to form a stable buffer system, which not only provides stability during normal jacking, but also can respond quickly in emergency situations, such as when the piston rod 68 is pressed by external force and drops rapidly, and limit the movement of the piston rod through the mechanical action of the emergency limit clamp, thereby avoiding possible structural damage or safety accidents.

[0070] Embodiment 3

[0071] A multi-point graded jacking structure for a large-span structure in a limited space.

[0072] When the weight of the steel structure 2 and the top support frame 3 exceeds the bearing strength of the stress support member and the support seat 680, and is also subject to external forces, resulting in the instability of the steel structure 2 and the top support frame 3, refer to Figure 8-9The piston rod 68 also includes a positioning support structure 8; the positioning support structure 8 includes a sleeve plate 80, support positioning plates 81 symmetrically arranged on both sides of the sleeve plate 80, a triangular plate 82 arranged at the other end of the support positioning plate 81, a first seat body 810 arranged at one end of the support positioning plate 81, a positioning clamping rod 811 arranged in the middle of the first seat body 810, a second seat body 812 arranged between the positioning clamping rods 811, reserved grooves 813 formed at both ends of the second seat body 812, a second bolt 814 arranged in the reserved groove 813, and an arched opening 815 formed in the middle of the second seat body 812.

[0073] A first rod 83 and a second rod 84 and a third bolt 85 connected to the first rod 83 and the second rod 84 are respectively disposed on two side surfaces of the support positioning plate 81 .

[0074] Working principle:

[0075] The sleeve plate 80 is the main part of the positioning support structure, which is connected to the piston rod 68 and provides a foundation for the entire support structure. The support positioning plates 81 are symmetrically arranged on both sides of the sleeve plate 80. Their function is to provide support force to ensure the stability of the piston rod 68 during the jacking process. The triangular plate 82 is arranged at the other end of the support positioning plate. Its triangular geometric shape provides additional stability and helps to disperse and resist external forces. The first seat body 810 and the positioning clamping rod 811 are located at one end of the support positioning plate 81. They work together to provide precise positioning for the piston rod 68 during the jacking process. The second seat body 812 is located at the positioning clamping rod Between the rods 811, two ends of the rods 811 form reserved grooves 813 for installing the second bolts 814 to further fix and stabilize the entire structure. The reserved grooves 813 and the second bolts 814 are used to fix the second seat body 812 to ensure that it will not move during the jacking process, thereby providing stable support. The arched mouth 815 is located in the middle of the second seat body 812 to reduce the weight of the structure or serve as the installation position of other components. The two sides of the support positioning plate are respectively provided with the first rod 83 and the second rod 84, which are connected by the third bolt 85, which increases the stability of the support positioning plate 81 and allows the support strength to be adjusted during the jacking process. During the jacking process, if the weight of the steel structure 2 and the top support frame 3 exceeds the bearing strength of the stress support and the support seat 680, or becomes unstable due to external forces, the positioning support structure 8 provides additional support and stability through the synergistic effect of its various components, which can prevent the excessive movement or tilt of the steel structure 2 and the top support frame 3, and ensure the safety of the jacking process and the integrity of the structure.

[0076] Furthermore, fourth bolts (not shown in the figure) are provided at both ends of the first seat body 810, thereby the second seat body 812 can be fixedly connected to the top support frame 3, thereby increasing the supporting area with the support frame 3 and improving the stability of the structure.

[0077] In summary, the present invention solves the problems of existing spatial structures that have decreased bearing capacity, increased deformation, reduced safety, and bearing capacity that does not meet requirements after reaching a certain service life, and the change in the use function of the large-span spatial structure, resulting in the original structure bearing capacity being unable to meet requirements. The load of the spatial structure is transferred to the frame structure 4 in sequence through the permanent supporting nodes formed by the set structure, and finally the load of the spatial structure is transferred to the ground or the next layer of structural board, thereby ensuring the safety of the spatial structure. At the same time, in the event of an accident, the present invention can also prevent and further ensure the stability and safety of the entire structure.

[0078] The present invention further provides a method for constructing a multi-point graded jacking structure of a large-span structure in a limited space, comprising the following steps:

[0079] S1. Conduct a construction site survey, clarify the construction scope and requirements, clean up the construction site, and build a safe construction platform and support;

[0080] S2. Install the steel support 1 on the foundation to ensure that it is stable and can bear the weight of the subsequent structure;

[0081] S3, building a steel structure 2 on the steel support 1;

[0082] S4. Subsequently, several steel pipe columns 40 are connected by mounting seats 43, square steel pipes 41 are welded to the steel pipe columns 40, and angle steel support frames 42 are welded to the square steel pipes 41, thereby improving the strength of the steel pipe columns 40;

[0083] S5. When the height requirement needs to be met, the multi-stage tire frame structure 4 is stacked in sequence, so that the top support structure 6 can support the steel structure 2 and the top support frame 3;

[0084] S6. When the tire frame structure 4 is stacked, the support seat 680 in the top support structure 6 is connected to the cross bar in the top support frame 3, and the semicircular groove 681 and the center rod 683 limit the cross bar, so that the cross bar is fixed at the center position of the support seat 680 through the center rod 683. At the same time, the rubber pad 682 in the semicircular groove 681 increases the friction between the cross bar and the semicircular groove 681, further improving the stability;

[0085] S7. When the height of the steel structure 2 and the top support frame 3 needs to be further adjusted, the oil cylinder 67 and the piston rod 68 in the top support structure 6 drive the support seat 680 to move upward, thereby accurately adjusting the height of the steel structure 2 and the top support frame 3;

[0086] S8. Thus, the steel structure 2 and the top support frame 3 can be stably supported, and the steel structure 2 and the top support frame 3 can also be further adjusted.

[0087] In step S7, the motion equation (1) of the steel structure 2 and the top support frame 3 as a whole in the vertical direction satisfies:

[0088] F-mg-F d +F e =ma, where a is the vertical acceleration of the steel structure 2 and the top support frame 3 as a whole, mg is the gravity acting on the steel structure 2 and the top support frame 3, where g is the acceleration due to gravity, and F d Damping force and F e External disturbance force. Damping force F d It is generally proportional to the speed of the piston rod and its direction is opposite to the speed, which can be expressed as F d =-cv, where c is the damping coefficient and v is the speed of the piston rod; external disturbance force F e It is a randomly changing force whose magnitude and direction vary with time. It is difficult to describe accurately and is usually represented by a random disturbance term in the model.

[0089] Substitute the damping force F e The expression of , we get the equation of motion (2):

[0090] F-mg+cv+F e =ma.

[0091] The dynamic characteristics of the cylinder can be reflected by the compressibility of the oil and the inertia of the piston. Assume that the bulk elastic modulus of the oil is K and the inertial mass of the piston is m p , A is the cross-sectional area of ​​the piston, then the relationship between the pressure change in the cylinder and the displacement and speed of the piston rod can be expressed as:

[0092]

[0093] Substituting the description of the dynamic characteristics of the cylinder into the motion equation (2), we obtain:

[0094] .

[0095] After sorting, we get:

[0096]

[0097] This is a second-order nonlinear differential equation, which includes the dynamic characteristics of the oil cylinder, the damping effect of the system, and external interference factors. By solving this equation, the change law of the piston rod displacement x over time can be obtained, thereby achieving precise control of the height of the steel structure 2 and the top support frame 3.

[0098] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-point hierarchical jacking structure for a large-span structure in a limited space, characterized in that: include A steel support (1); a steel structure (2) arranged on the steel support (1); and a top support frame (3) arranged between the two steel supports (1); A segmented tire frame structure (4) disposed on the top support frame (3), which is used to support the top support frame (3) and the steel structure (2); An oblique support rod (5) disposed on one side of the tire frame structure (4) and used to support the tire frame structure (4); A supporting structure (6) disposed on the tire frame structure (4); the supporting structure (6) comprises a supporting square steel tube (60), a steel plate base (61) disposed on the top of the supporting square steel tube (60), a jacking device disposed on the top surface of the steel plate base (61), stress support members symmetrically disposed at both ends of the jacking device, a support seat (680) disposed at one end of the jacking device and on the top surface of one of the stress support members, and a semicircular groove (681) formed on the support seat (680); The tire frame structure (4) supports the top support frame (3) and the steel structure (2), while the inclined support rod (5) supports the tire frame structure (4) to keep the tire frame structure (4) stable. At the same time, the stress support member and the support seat (680) at one end of the jacking device are connected and fixed to the top support frame (3). During jacking, the jacking device drives the top support frame (3) and the steel structure (2) to move upward.

2. The multi-point hierarchical jacking structure of a limited space large-span structure according to claim 1 is characterized in that: The tire frame structure (4) includes a plurality of steel pipe columns (40), a plurality of square steel pipes (41) arranged in sequence on the steel pipe columns (40), a plurality of angle steel support frames (42) arranged between the square steel pipes (41), a cushion block (44) arranged on one of the square steel pipes (41), angle steel beams (45) symmetrically arranged on both sides of the steel pipe columns (40), and diagonal angle steels (46) arranged between the angle steel beams (45).

3. The multi-point hierarchical jacking structure of a limited space large-span structure according to claim 1 is characterized in that: The oblique support rod (5) comprises a connecting seat (50), a connecting piece (51) arranged on the top surface of the connecting seat (50) and connected to the oblique support rod (5), and a first bolt (52) symmetrically arranged on the connecting seat (50).

4. The multi-point hierarchical jacking structure of a limited space large-span structure according to claim 1 is characterized in that: The stress support member comprises a stiffening rib (62) and a stress frame (63) symmetrically arranged on the stiffening rib (62); the stiffening rib (62) is sleeved on the outer periphery of the oil cylinder (67) in the jacking device to keep the oil cylinder (67) stable, and a piston rod (68) connected to the oil cylinder (67) is connected to another group of the stress support members to support the jacking frame (3).

5. The multi-point hierarchical jacking structure of a limited space large-span structure according to claim 1 is characterized in that: A rubber pad (682) is provided on the semicircular groove (681), and a center rod (683) for inserting the top support frame (3) is provided in the middle of the semicircular groove (681).

6. The multi-point hierarchical jacking structure of a limited space large-span structure according to claim 4 is characterized in that: The oil cylinder (67) and the piston rod (68) also include a stable buffer structure (7); the stable buffer structure (7) includes a first ring plate (70) and a second ring plate (71), a positioning rod (72) and an emergency limit clamp (75) arranged between the first ring plate (70) and the second ring plate (71), a compression spring (73) sleeved on the outer periphery of the positioning rod (72), and a limit contact ring (74) arranged at one end of the positioning rod (72).

7. The multi-point hierarchical jacking structure of a limited space large-span structure according to claim 6 is characterized in that: The emergency limit clamp (75) includes a first plate (750) and a second plate (751) that are movably connected, a first pivot seat (752) arranged on a side of the second plate (751), a first connecting rod (753) movably arranged between the two first pivot seats (752), a third pivot seat (755) arranged on the second ring plate (71), and a second connecting rod (756) movably arranged between the two third pivot seats (755); when the second ring plate (71) and the first ring plate (70) are subjected to force, the second connecting rod (756) drives the limit plate (758) to fit the outer wall of the piston rod (68), and the first plate (750) and the second plate (751) make the same movement as the second connecting rod (756), so that the first pivot seat (752) and the first connecting rod (753) further strengthen the fit between the limit plate (758) and the piston rod (68).

8. The multi-point hierarchical jacking structure of a limited space large-span structure according to claim 1 is characterized in that: The piston rod (68) also includes a positioning support structure (8); the positioning support structure (8) includes a sleeve plate (80), support positioning plates (81) symmetrically arranged on both sides of the sleeve plate (80), a triangular plate (82) arranged at the other end of the support positioning plate (81), a first seat body (810) arranged at one end of the support positioning plate (81), a positioning clamping rod (811) arranged in the middle of the first seat body (810), a second seat body (812) arranged between the positioning clamping rods (811), reserved grooves (813) formed at both ends of the second seat body (812), a second bolt (814) arranged in the reserved groove (813), and an arched opening (815) formed in the middle of the second seat body (812).

9. The multi-point hierarchical jacking structure of a limited space large-span structure according to claim 8 is characterized in that: The two side surfaces of the supporting positioning plate (81) are respectively provided with a first rod (83) and a second rod (84), and a third bolt (85) connected to the first rod (83) and the second rod (84).

10. A method for constructing a multi-point graded jacking structure of a large-span structure in a limited space, comprising a multi-point graded jacking structure of a large-span structure in a limited space as claimed in any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1. Conduct a construction site survey, clarify the construction scope and requirements, clean up the construction site, and build a safe construction platform and support; S2. Install the steel support (1) on the foundation to ensure that it is stable and can bear the weight of the subsequent structure; S3, building the steel structure (2) on the steel support (1); S4. Subsequently, a plurality of the steel pipe columns (40) are connected by the mounting seat (43), the square steel pipe (41) is welded to the steel pipe column (40), and the angle steel support frame (42) is welded to the square steel pipe (41), thereby improving the strength of the steel pipe column (40); S5. When height requirements need to be met, the multi-stage tire frame structure (4) is stacked in sequence, so that the top support structure (6) can support the steel structure (2) and the top support frame (3); S6. When the tire frame structure (4) is stacked, the support seat (680) in the top support structure (6) is connected to the cross bar in the top support frame (3), and the semicircular groove (681) and the center rod (683) limit the cross bar, so that the cross bar is fixed at the center position of the support seat (680) through the center rod (683). At the same time, the rubber pad (682) in the semicircular groove (681) increases the friction between the cross bar and the semicircular groove (681), thereby further improving stability; S7. When the height of the steel structure (2) and the top support frame (3) needs to be further adjusted, the oil cylinder (67) and the piston rod (68) in the top support structure (6) drive the support seat (680) to move upward, thereby accurately adjusting the height of the steel structure (2) and the top support frame (3); S8. Thus, the steel structure (2) and the top support frame (3) can be stably supported, and the steel structure (2) and the top support frame (3) can also be further adjusted.

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