CN119801136B - A multi-point, staged jacking structure for large-span structures in confined spaces and its construction method - Google Patents
A multi-point, staged jacking structure for large-span structures in confined spaces and its construction methodInfo
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- CN119801136B CN119801136B CN202510079725.2A CN202510079725A CN119801136B CN 119801136 B CN119801136 B CN 119801136B CN 202510079725 A CN202510079725 A CN 202510079725A CN 119801136 B CN119801136 B CN 119801136B
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Abstract
The invention provides a multi-point hierarchical jacking structure of a limited space large-span structure and a construction method, comprising steel brackets, a steel structure arranged on the steel brackets, a jacking device arranged between the two steel brackets, a segmented tire frame structure arranged on the jacking device and used for supporting the jacking device and the steel structure, an inclined support rod arranged on one side of the tire frame structure and used for supporting the tire frame structure, a jacking structure arranged on the tire frame structure, wherein the jacking structure comprises a supporting square steel pipe, a steel plate base arranged on the top of the supporting square steel pipe, jacking devices arranged on the top surface of the steel plate base, and stress supports symmetrically arranged at two ends of the jacking devices. The invention improves the safety and reliability of the jacking operation, can be suitable for various unexpected situations, and ensures the high efficiency and high stability of the jacking process.
Description
Technical Field
The invention relates to a multi-point hierarchical jacking structure of a limited space large-span structure and a construction method.
Background
The steel structure building is widely applied in a plurality of fields such as high-rise buildings, large-span bridges, stadiums and the like, and the application range of the steel structure building is gradually increased by virtue of the excellent performance of the steel material, the characteristics of high industrialization of manufacturing and installation, realization of special modeling which cannot be realized by the traditional building and the like, and the steel structure building has the characteristics of light dead weight, good earthquake resistance, good durability, large span, energy conservation, environmental protection, good economical efficiency and the like compared with the traditional brick-concrete structure and the reinforced concrete structure.
However, in recent years, the bearing capacity of the large-span space structure in each region is reduced due to fatigue performance of steel or corrosion of steel after the large-span space structure reaches a certain service life, deformation is increased, and safety is reduced. Therefore, the design of the jacking structure with strong bearing capacity and high safety is the research direction of the invention.
Disclosure of Invention
The invention provides a multi-point hierarchical jacking structure of a limited space large-span structure and a construction method, which can effectively solve the problems.
The invention is realized in the following way:
A multi-point hierarchical jacking structure of a limited space large-span structure and a construction method thereof comprise
The steel structure is arranged on the steel brackets, and the top support frame is arranged between the two steel brackets;
The sectional type jig frame structure is arranged on the top support frame and is used for supporting the top support frame and the steel structure;
The inclined support rod is arranged at one side of the jig frame structure and is used for supporting the jig frame structure;
The jacking structure comprises a square steel pipe, a steel plate base, a jacking device, stress supporting pieces, a supporting seat and a semicircular groove, wherein the steel plate base is arranged at the top of the square steel pipe, the jacking device is arranged at the top surface of the steel plate base, the stress supporting pieces are symmetrically arranged at two ends of the jacking device, the supporting seat is arranged at one end of the jacking device and at the top surface of one stress supporting piece, and the semicircular groove is formed in the supporting seat;
The jig frame structure supports the top support frame and the steel structure, the inclined support rods support the jig frame structure, so that the jig frame structure is kept stable, meanwhile, the stress support piece at one end of the jacking device, the support seat and the top support frame are fixedly connected, and the jacking device drives the top support frame and the steel structure to move in an upward telescopic manner during jacking.
As a further improvement, the jig frame structure comprises a plurality of steel pipe columns, a plurality of square steel pipes arranged on the steel pipe columns in sequence, a plurality of angle steel support frames arranged between the square steel pipes, a cushion block arranged on one square steel pipe, angle steel cross beams symmetrically arranged on two sides of the steel pipe columns, and inclined-pull angle steel arranged between the angle steel cross beams.
As a further improvement, the diagonal bracing bar comprises a connecting seat, a connecting piece which is arranged on the top surface of the connecting seat and connected with the diagonal bracing bar, and a first bolt which is symmetrically arranged on the connecting seat.
The stress support piece comprises stiffening ribs and stress frames symmetrically arranged on the stiffening ribs, wherein the stiffening ribs are sleeved on the periphery of an oil cylinder in the jacking device, so that the oil cylinder is kept stable, and a piston rod connected with the oil cylinder is connected with another group of stress support pieces so as to support the jacking frames.
As a further improvement, a rubber pad is arranged on the semicircular groove, and a center rod for plugging the top support frame is arranged in the middle of the semicircular groove.
The cylinder and the piston rod are further improved, the cylinder and the piston rod are further provided with a stable buffer structure, the stable buffer structure comprises a first annular plate and a second annular plate, a positioning rod and an emergency limiting clamping piece are arranged between the first annular plate and the second annular plate in a surrounding mode, a pressure spring is sleeved on the periphery of the positioning rod, and a limiting contact ring is arranged at one end of the positioning rod.
The emergency limiting clamping piece comprises a first plate and a second plate which are movably connected, a first pivot seat is arranged on one side face of the second plate, a first connecting rod is movably arranged between the two first pivot seats, a third pivot seat is arranged on the second annular plate, a second connecting rod is movably arranged between the two third pivot seats, when the second annular plate and the first annular plate are stressed, the second connecting rod drives the limiting plate to be attached to the outer wall of the piston rod, and the first plate, the second plate and the second connecting rod make the same motion, so that the attachment degree of the limiting plate and the piston rod is further enhanced by the first pivot seat and the first connecting rod.
The piston rod is further improved in that the piston rod further comprises a positioning support structure, the positioning support structure comprises a sleeve plate, supporting positioning plates symmetrically arranged on two sides of the sleeve plate, a triangular plate arranged on the other end of the supporting positioning plate, a first seat body arranged on one end of the supporting 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 in two ends of the second seat body, second bolts arranged in the reserved grooves and arch-shaped openings formed in the middle of the second seat body.
As a further improvement, the two side surfaces of the supporting and positioning plate are respectively provided with a first rod and a second rod, and a third bolt connected with the first rod and the second rod.
The invention further provides a construction method of the multi-point hierarchical jacking structure of the limited space large-span structure, which comprises the following steps of;
S1, performing construction site investigation, defining a construction range and requirements, cleaning a construction site, and building a safe construction platform and a support;
S2, installing the steel bracket on the foundation to ensure that the steel bracket is stable and can bear the weight of a subsequent structure;
S3, building the steel structure on the steel bracket;
S4, connecting a plurality of steel pipe columns by using the mounting seats, welding the square steel pipes on the steel pipe columns, and welding the angle steel support frames on the square steel pipes so as to improve the strength of the steel pipe columns;
S5, when the height requirement needs to be met, stacking the multi-section type jig frame structures in sequence, so that the supporting structure can support the steel structure and the supporting frame;
s6, after stacking of the jig frame structure is completed, the supporting seat in the supporting structure is connected with the cross rod in the supporting frame, the cross rod is limited by the semicircular groove and the center rod, so that the cross rod is fixed at the center position of the supporting seat through the center rod, meanwhile, the friction force between the cross rod and the semicircular groove is increased by the rubber pad in the semicircular groove, and the stability is further improved;
S7, when the heights of the steel structure and the top support frame need to be further adjusted, the oil cylinder and the piston rod in the top support structure drive the supporting seat to move upwards, so that the heights of the steel structure and the top support frame can be accurately adjusted;
S8, the steel structure and the top support frame can be stably supported, and the steel structure and the top support frame can be further adjusted.
The beneficial effects of the invention are as follows:
(1) The invention improves the stability and safety of the jacking process through the jacking structure, and the structure can realize the multi-point graded jacking of the large-span structure in a limited space through a plurality of carefully designed components, such as a steel bracket, a steel structure, a jacking frame, a sectional jig frame structure, a diagonal bracing rod, a jacking structure, a stress supporting piece and the like, and particularly, the design that a center rod is directly contacted with a semicircular groove reduces energy loss, improves the jacking efficiency, and is beneficial to resisting lateral force and keeping the stability and safety of the jacking process due to the uniform distribution of the center position. Overall, the design of this structure optimizes the force transmission path, reduces localized stress concentrations, and improves the load carrying capacity and durability of the structure.
(2) The stable buffer structure of the invention can effectively limit the descending speed of the piston rod under the emergency condition that the piston rod descends rapidly caused by the compression of external force, thereby protecting the structure from being damaged and avoiding the occurrence of safety accidents, in particular, the quick response and the linkage mechanism of the emergency limiting clamping piece can act in time when the piston rod is impacted, the falling of the emergency limiting clamping piece is slowed down or prevented through the joint of the limiting plate and the outer wall of the piston rod, and the design remarkably improves the safety and reliability of the jacking structure in the face of emergency.
(3) According to the invention, through the design of the positioning support structure, in particular the cooperation of the sleeve plate, the support positioning plate, the triangular plate, the first seat body, the positioning clamping rod, the second seat body, the reserved groove, the second bolt, the arched opening and other components, the structure can provide additional support and stability when the weight of the steel structure and the top support frame exceeds the bearing strength of the stress support piece and the support seat or is influenced by external force to become unstable, the design effectively prevents the excessive movement or inclination of the steel structure and the top support frame, ensures the safety and the structural integrity of the jacking process, and further improves the reliability of the whole jacking structure and the engineering safety.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a front view of a first embodiment of the present invention.
Fig. 2 is a schematic view of a tire frame structure according to a first embodiment of the present invention.
Fig. 3 is a left side view of a tire frame structure in accordance with an embodiment of the present invention.
Fig. 4 is a schematic view of a jack-up structure according to a first embodiment of the present invention.
Fig. 5 is a schematic lifting view of a jack-up structure according to an embodiment of the invention.
FIG. 6 is a schematic diagram of a stable buffer structure according to a second embodiment of the present invention.
Fig. 7 is a schematic view of an emergency limiting clamp according to a second embodiment of the invention.
Fig. 8 is a schematic diagram of a third embodiment of the present invention.
Fig. 9 is a schematic view of a positioning support structure in a third embodiment of the present invention.
Reference numerals illustrate:
1. a steel bracket, a steel structure, a top support frame and a support frame;
4. A jig frame structure; 40, steel pipe columns, 41, square steel pipes, 42, angle steel support frames, 43, installation seats, 44, cushion blocks, 45, angle steel cross beams, 46 and diagonal angle steel;
5. A diagonal support bar; 50, a connecting seat, 51, a connecting piece, 52 and a first bolt;
6. 60 parts of supporting structure, 61 parts of square steel pipes, 61 parts of steel plate base, 62 parts of stiffening ribs, 63 parts of stress frames, 67 parts of oil cylinders, 68 parts of piston rods, 680 parts of supporting seats, 681 parts of semicircular grooves, 682 parts of rubber pads, 683 parts of center rods;
7. the device comprises a stable buffer structure, 70, a first annular plate, 71, a second annular plate, 72, a positioning rod, 73, a pressure spring, 74, a limiting contact ring, 75, an emergency limiting clamping piece, 750, a first plate, 751, a second plate, 752, a first pivot seat, 753, a first connecting rod, 755, a third pivot seat, 756, a second connecting rod, 758, a limiting plate, 76, a reinforcing rod, 77 and a bending part;
8. Positioning a supporting structure; 80 parts of sleeve plate, 81 parts of supporting and positioning plate, 810 parts of first seat body, 811 parts of positioning and clamping rod, 812 parts of second seat body, 813 parts of reserved groove, 814 parts of second bolt, 815 parts of arched opening, 82 parts of triangular plate, 83 parts of first rod, 84 parts of second rod, 85 parts of third bolt.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
In the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Example 1
Referring to fig. 1-5, a multi-point hierarchical jacking structure of a limited space large-span structure comprises steel brackets 1, a steel structure 2 arranged on the steel brackets 1, and a top support frame 3 arranged between the two steel brackets 1.
The sectional type bed-jig structure 4 is arranged on the top support frame 3 and is used for supporting the top support frame 3 and the steel structure 2, wherein the bed-jig structure 4 comprises a plurality of steel pipe columns 40, a plurality of square steel pipes 41 sequentially arranged on the steel pipe columns 40, a plurality of angle steel support frames 42 arranged between the square steel pipes 41 and a cushion block 44 arranged on one square steel pipe 41. Wherein the spacer blocks 44 may ensure a more stable mounting of the jacking construction 6 to the jig frame structure 4. Angle steel beams 45 symmetrically arranged on both sides of the steel pipe column 40, and diagonal angle steel 46 arranged between the angle steel beams 45.
The diagonal brace 5 is arranged on one side of the jig frame structure 4 and is used for supporting the jig frame structure 4, and the diagonal brace 5 comprises a connecting seat 50, a connecting piece 51 which is arranged on the top surface of the connecting seat 50 and is connected with the diagonal brace 5, and first bolts 52 which are symmetrically arranged on the connecting seat 50.
The inclined support rod 5 can be telescopic or integrated, and further, the inclined support rod 5 is fixedly connected with the jig frame structure 4, so that a supporting force for multi-point synchronous lifting of the jig frame structure 4 can be provided, and the stability of the jig frame structure 4 is ensured.
The jacking structure 6 is arranged on the tire frame structure 4, the jacking structure 6 comprises a square steel pipe 60, a steel plate base 61 arranged on the top of the square steel pipe 60, a jacking device arranged on the top surface of the steel plate base 61, stress supporting pieces symmetrically arranged at two ends of the jacking device, a supporting seat 680 arranged at one end of the jacking device and arranged on the top surface of one of the stress supporting pieces, a semicircular groove 681 formed on the supporting seat 680, further, a rubber pad 682 is arranged on the semicircular groove 681, and a center rod 683 for plugging the jacking frame 3 is arranged in the middle of the semicircular groove 681. It should be noted that the center rod 683 disposed at the middle of the half slot 681 allows the center rod 683 to directly contact the half slot 681, which can more effectively transmit the jacking force, the direct transmission of force reduces energy loss, and improves the jacking efficiency, while the center position provides better stability, because the center rod 683 can be uniformly distributed at the center of the half slot 681, which helps to resist the lateral force that may be encountered during the jacking process, and furthermore, if the center rod 683 is disposed at the center of the half slot, it will be more stable, less likely to deflect or tilt during the jacking process, which helps to maintain the stability and safety of the jacking process, and also helps to optimize the stress distribution, reduce the local stress concentration, and thereby improve the bearing capacity and durability of the structure.
The stress supporting members comprise stiffening ribs 62 and stress frames 63 symmetrically arranged on the stiffening ribs 62, the stiffening ribs 62 are sleeved on the periphery of an oil cylinder 67 in the jacking device, so that the oil cylinder 67 is kept stable, and piston rods 68 connected with the oil cylinder 67 are connected with another group of stress supporting members so as to support the jacking frame 3.
Further, an angle B is formed between the stress frame 63 and the steel plate base 61, wherein B is 30-90 degrees. To ensure that the stress frame 63 can effectively support the stiffener 62. In one embodiment, B is about 45 degrees. The advantage of this arrangement is that the dynamic stability of the structure can be improved, especially in the case of lateral forces that may be encountered during jacking, the obliquely arranged stress frame 63 can provide a better force transmission path, so that the jacking force acts more directly on the jacking frame 3, and the jacking efficiency is improved.
Further, in order to adapt to different jacking conditions and construction requirements, the stress frame 63 in the present case can be further provided with an angle adjustable, and this design allows a constructor to adjust the angle of the stress frame 63 according to actual conditions, so as to achieve optimal jacking effect and construction convenience, and the stress frame 63 with adjustable angle provides greater flexibility. It should be noted that, the implementation needs to be set according to the application scenario and the application condition.
Working principle:
First, the steel brackets 1 provide a solid foundation for the whole structure, and the steel structures 2 are mounted on these brackets in preparation for withstanding the forces during lifting. The jacking frame 3 is positioned between two steel brackets and serves as a main supporting point in the jacking process, the sectional type jig frame structure 4 is arranged on the jacking frame and consists of steel pipe columns 40, square steel pipes 41, angle steel supporting frames 42, cushion blocks 44, angle steel cross beams 45 and diagonal angle steel 46, a stable supporting frame is formed, the frame not only supports the jacking frame 3 and the steel structure 2, but also further improves the stability of the whole structure through reinforcement of the diagonal supporting frames 5, the jacking structure 6 is the core in the jacking process and is arranged on the jig frame structure 4 and comprises supporting square steel pipes 60, a steel plate base 61 and a jacking device, an oil cylinder 67 and a piston rod 68 in the jacking device stretch during jacking, the stability of the oil cylinder 67 in the jacking process is ensured through the stabilizing effect of stress supporting pieces comprising stiffening ribs 62 and stress frames 63, the piston rod 68 is connected with another group of stress supporting pieces, these supports support the jacking frame 3 so that the jacking force can be effectively transferred to the steel structure 2, the jacking device is started during the jacking process, the piston rod 68 pushes the jacking frame 3 and the steel structure 2 to move upwards, the rubber pad 682 and the central rod 683 on the semicircular groove 681 ensure stable plug-in connection of the jacking frame 3 during the jacking process, sliding or instability is prevented, the stable buffer structure 7 comprises a first annular plate 70, a second annular plate 71, a positioning rod 72, an emergency limit clamping piece 75, a pressure spring 73 and a limit contact ring 74, additional stability and buffering are provided for the jacking process, stability and safety of the jacking process are ensured, the emergency limit clamping piece 75, under the action of stress, strengthens the fitting degree of the limit plate 758 and the piston rod 68 through the cooperation of the first plate 750 and the second plate 751 and the first connecting rod 753 and the second connecting rod 756, further ensures the safety during the jacking process, the positioning and supporting structure 8 comprises a sleeve plate 80, a supporting and positioning plate 81, a triangular plate 82, a first base 810, a positioning and clamping rod 811, a second base 812, a reserved groove 813, a second bolt 814 and an arch-shaped opening 815, so that accurate positioning and stability after jacking are ensured. The design of the whole system allows the multi-point hierarchical jacking of a large-span structure to be realized in a limited space, ensures the stability and the safety of the jacking process, is suitable for projects requiring accurate jacking, such as bridges, large-scale building structures and the like, and allows the multi-point hierarchical jacking to be performed in a complex environment, and ensures the stability and the safety of the jacking process.
Example two
A multi-point hierarchical jacking structure of a limited space large-span structure,
When the steel structure 2 and the top support 3 are pressed by external force factors and the piston rod 68 rapidly descends 1, referring to fig. 6-7, the cylinder 67 and the piston rod 68 further comprise a stable buffer structure 7, the stable buffer structure 7 comprises a first ring plate 70 and a second ring plate 71, a positioning rod 72 and an emergency limiting clamping piece 75 are arranged around the first ring plate 70 and the second ring plate 71, a pressure spring 73 is sleeved on the periphery of the positioning rod 72, and a limiting contact ring 74 is arranged at one end of the positioning rod 72.
The emergency limiting clamping piece 75 comprises a first plate 750 and a second plate 751 which are movably connected, a first pivot seat 752 arranged on one side face 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 annular plate 71, and a second connecting rod 756 movably arranged between the two third pivot seats 755, when the second annular plate 71 and the first annular plate 70 are stressed, the second connecting rod 756 drives the limiting plate 758 to be attached to the outer wall of the piston rod 68, and the first plate 750 and the second plate 751 make the same movement with the second connecting rod 756, so that the attaching degree of the limiting plate 758 and the piston rod 68 is further enhanced by the first pivot seat 752 and the first connecting rod 753.
It should be noted that, since the connection structure formed by the third pivot seat 755 and the second link 756 is symmetrically disposed on the limiting plate 758, when the first ring plate 70 is stressed, the connection structure directly moves downward and drives the limiting plate 758 to attach to the piston rod 68, and in order to ensure the strength of the connection structure, the first pivot seat 752 and the first link 753 on the first plate 750 and the second plate 751 are also connected to the limiting 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 link 753 to attach to the piston rod 68, and further, 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 drawing), thereby forming a linkage effect.
Working principle:
The first ring plate 70 and the second ring plate 71 are respectively installed at both ends of the piston rod 68, they provide basic support for the whole stable buffer structure, the first ring plate 70 and the second ring plate 71 are connected through the positioning rod 72 to form a closed ring structure, the stability of the piston rod 68 during the lifting process is ensured, the positioning rod 72 is located between the first ring plate 70 and the second ring plate 71, it functions 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, the tight contact between the piston rod 68 and the first ring plate 70 and the second ring plate 71 is ensured during the lifting process, the emergency limit clamp 75 is composed of the first plate 750, the second plate 751, the first pivot seat 752, the first link 753, the third pivot seat 755 and the second link 756, the emergency limiting clamping piece 75 keeps a loose state, when the piston rod 68 is pressed by external force to rapidly descend, the emergency limiting clamping piece 75 responds rapidly, the first plate 750 and the second plate 751 drive the limiting plate 758 to be attached to the outer wall of the piston rod 68 through the linkage action of the first connecting rod 753 and the second connecting rod 756, the descending speed of the piston rod 68 is limited, the pressure spring 73 is sleeved on the periphery of the positioning rod 72 to provide pretightening force for the piston rod 68, in the jacking process, the oil cylinder 67 provides power through a hydraulic system to push the piston rod 68 to move upwards, so that the jacking structure is driven to ascend, the pressure spring 73 in the stable buffering structure 7 provides buffering to absorb impact and vibration in the jacking process, the design ensures that the jacking structure can rapidly respond even if sudden external force pressing is encountered in the jacking process, and possible structural damage or safety accidents are avoided. In summary, these components cooperate to form a stable cushioning system that not only provides stability during normal jacking, but also responds quickly when an emergency is encountered, such as when the piston rod 68 is forced by an external force to drop down rapidly, limiting movement of the piston rod by mechanical action of the emergency limit grip, thereby avoiding possible structural damage or safety hazards.
Example III
A multi-point hierarchical jacking structure of a limited space large-span structure,
When the weight of the steel structure 2 and the top support 3 exceeds the bearing strength of the stress supporting member and the supporting seat 680 and is subjected to external force factors, and the steel structure 2 and the top support 3 are unstable, referring to fig. 8-9, the piston rod 68 further comprises a positioning supporting structure 8, wherein the positioning supporting structure 8 comprises a sleeve plate 80, supporting positioning plates 81 symmetrically arranged on two sides of the sleeve plate 80, a triangular plate 82 arranged on the other end of the supporting positioning plate 81, a first seat 810 arranged on one end of the supporting positioning plate 81, a positioning clamping rod 811 arranged in the middle of the first seat 810, a second seat 812 arranged between the positioning clamping rods 811, reserved grooves 813 formed on two ends of the second seat 812, second bolts 814 arranged in the reserved grooves 813, and an arch-shaped opening 815 formed in the middle of the second seat 812.
The support positioning plate 81 is provided with a first rod 83 and a second rod 84 on both side surfaces thereof, respectively, and a third bolt 85 connected to the first rod 83 and the second rod 84.
Working principle:
The sleeve plate 80 is a main body part of a positioning and supporting structure, and is connected with the piston rod 68 to provide a foundation for the whole supporting structure, the supporting and positioning plates 81 are symmetrically arranged at two sides of the sleeve plate 80, the function of the supporting and positioning plates is to provide supporting force to ensure the stability of the piston rod 68 in the jacking process, the triangular plates 82 are arranged at the other ends of the supporting and positioning plates, the triangular geometric shapes of the triangular plates provide additional stability to help disperse and resist external force, the first seat 810 and the positioning and clamping rods 811 are positioned at one end of the supporting and positioning plates 81, the first seat 810 and the positioning and clamping rods 811 work together to provide accurate positioning for the piston rod 68 in the jacking process, the second seat 812 is positioned between the positioning and clamping rods 811, the two ends of the second seat 812 form reserved grooves 813 for installing the second bolts 814 to further fix and stabilize the whole structure, the reserved grooves 813 and the second bolts 814 are used for fixing the second seat 812 and ensuring that the second seat can not move in the jacking process, so as to provide stable support, the arched openings 815 are positioned at the middle part of the second seat 812 to lighten the structure weight or serve as the installation position of other parts, the supporting and the two sides of the supporting and positioning plates are respectively provided with the first rod 83 and the second rod 84 are connected by the third rod and the third rod 85 to enable stability adjustment in the supporting and the stability in the process. If the weight of the steel structure 2 and the jacking frame 3 exceeds the bearing strength of the stress supports and the supporting seats 680 or becomes unstable by external force during the jacking process, the positioning support structure 8 provides additional support and stability through the cooperation of the respective components thereof, which can prevent excessive movement or tilting of the steel structure 2 and the jacking frame 3, ensuring the safety and structural integrity of the jacking process.
Further, the fourth bolts (not shown) are further disposed at two ends of the first seat 810, so that the second seat 812 can be fixedly connected with the top support 3, thereby increasing the supporting area of the top support 3 and improving the stability of the structure.
In summary, the invention solves the problems that the existing space structure cannot meet the requirement due to the fact that the bearing capacity is reduced, the deformation is increased, the safety is reduced, the bearing capacity is not met and the original structure cannot meet the requirement due to the fact that the using function of the large-span space structure is changed after the service life of the existing space structure is up to a certain extent, the load of the space structure is sequentially transmitted to the jig frame structure 4 through the permanent supporting nodes formed by the arranged structure, and finally the load of the space structure is transmitted to the ground or the next layer of structure panel to ensure the safety of the space structure.
The invention further provides a construction method of the multi-point hierarchical jacking structure of the limited space large-span structure, which comprises the following steps of;
S1, performing construction site investigation, defining a construction range and requirements, cleaning a construction site, and building a safe construction platform and a support;
s2, installing a steel bracket 1 on a foundation to ensure that the steel bracket is stable and can bear the weight of a subsequent structure;
s3, building a steel structure 2 on the steel bracket 1;
S4, connecting a plurality of steel pipe columns 40 by using mounting seats 43, welding square steel pipes 41 on the steel pipe columns 40, and welding angle steel support frames 42 on the square steel pipes 41 so as to improve the strength of the steel pipe columns 40;
s5, when the height requirement needs to be met, stacking the multi-section jig frame structures 4 in sequence, so that the supporting structure 6 can support the steel structure 2 and the supporting frame 3;
S6, after stacking of the jig frame structure 4 is completed, the supporting seat 680 in the supporting structure 6 is connected with the cross rod in the supporting frame 3, the cross rod is limited by the semicircular groove 681 and the central rod 683, so that the cross rod is fixed at the central position of the supporting seat 680 through the central rod 683, and meanwhile, the friction force between the cross rod and the semicircular groove 681 is increased by the rubber pad 682 in the semicircular groove 681, so that stability is further improved;
S7, when the heights of the steel structure 2 and the top support frame 3 need to be further adjusted, the oil cylinder 67 and the piston rod 68 in the top support structure 6 drive the supporting seat 680 to move upwards, so that the heights of the steel structure 2 and the top support frame 3 can be accurately adjusted;
s8, 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 be further adjusted.
In step S7, the equation of motion (1) of the steel structure 2 and the roof support 3 as a whole in the vertical direction satisfies:
F-mg-F d+Fe =ma, where a is the vertical upward acceleration of the whole of the steel structure 2 and the top bracket 3, and mg is the gravitational effect suffered by the steel structure 2 and the top bracket 3, where g is the gravitational acceleration, F d damping force and F e external disturbance force. Damping force F d is generally proportional to the velocity of the piston rod, and the direction is opposite to the velocity direction, and can be expressed as F d = -cv, where c is the damping coefficient and v is the velocity of the piston rod, and external disturbance force F e is a randomly varying force, the magnitude and direction of which are difficult to describe accurately, and is usually expressed as a random disturbance term in the model.
Substituting the expression of the damping force F e to obtain a motion equation (2):
F-mg+cv+Fe=ma。
the dynamic characteristics of the oil cylinder can be represented by the compressibility of oil and the inertia of a piston. Assuming that the volume elastic modulus of oil is K, the inertial mass of the piston is m p, A is the sectional area of the piston, and the relation between the pressure change in the oil cylinder and the displacement and speed of the piston rod can be expressed as follows:
Substituting the description of the dynamic characteristics of the oil cylinder into a motion equation (2) to obtain:
。
After finishing, the method comprises the following steps:
This is a second order nonlinear differential equation that contains the dynamics of the cylinder, the damping effect of the system, and external disturbances. By solving the equation, the change rule of the displacement x of the piston rod along with time can be obtained, and further, the accurate control of the heights of the steel structure 2 and the top support 3 is realized.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a limited space strides structure multiple spot hierarchical climbing structure which characterized in that includes
The steel structure (2) is arranged on the steel brackets (1), and the top support frame (3) is arranged between the two steel brackets (1);
A segmented bed-jig structure (4) arranged on the top support (3) for supporting the top support (3) and the steel structure (2);
The inclined support rod (5) is arranged at one side of the jig frame structure (4) and is used for supporting the jig frame structure (4);
The jacking structure (6) is arranged on the jig frame structure (4), the jacking structure (6) comprises a supporting square steel pipe (60), a steel plate base (61) arranged at the top of the supporting square steel pipe (60), jacking devices arranged on the top surface of the steel plate base (61), stress supporting pieces symmetrically arranged at two ends of the jacking devices, supporting seats (680) arranged at one end of the jacking devices and arranged on the top surface of one of the stress supporting pieces, and semicircular grooves (681) formed on the supporting seats (680);
the jig frame structure (4) supports the top support frame (3) and the steel structure (2), the diagonal support rods (5) support the jig frame structure (4), so that the jig frame structure (4) is kept stable, meanwhile, the stress support piece at one end of the jacking device and the support seat (680) are fixedly connected with the top support frame (3), and the jacking device drives the top support frame (3) and the steel structure (2) to move in an upward telescopic manner during jacking.
2. The multi-point hierarchical jacking structure of a limited space large-span structure according to claim 1, wherein the bed-jig structure (4) comprises a plurality of steel pipe columns (40), a plurality of square steel pipes (41) sequentially arranged on the steel pipe columns (40) through installation seats (43), a plurality of angle steel support frames (42) arranged between the square steel pipes (41), cushion blocks (44) arranged on one square steel pipe (41), angle steel cross beams (45) symmetrically arranged on two side surfaces of the steel pipe columns (40), and diagonal angle steel (46) arranged between the angle steel cross beams (45).
3. The multi-point hierarchical jacking structure of a limited space large span structure according to claim 1, wherein the diagonal brace (5) comprises a connecting seat (50), a connecting piece (51) arranged on the top surface of the connecting seat (50) and connected with the diagonal brace (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 2, wherein the stress supporting members comprise stiffening ribs (62), stress frames (63) symmetrically arranged on the stiffening ribs (62), the stiffening ribs (62) are sleeved on the periphery of an oil cylinder (67) in the jacking device, the oil cylinder (67) is kept stable, and piston rods (68) connected with the oil cylinder (67) are connected with another group of stress supporting members, so that the jacking frames (3) are supported.
5. The multi-point hierarchical jacking structure of the limited space large span structure according to claim 4, wherein a rubber pad (682) is arranged on the semicircular groove (681), and a central rod (683) for plugging the top support (3) is arranged in the middle of the semicircular groove (681).
6. The multi-point hierarchical jacking structure of the limited space large-span structure according to claim 5, wherein the oil cylinder (67) and the piston rod (68) further comprise a stable buffer structure (7), the stable buffer structure (7) comprises a first annular plate (70) and a second annular plate (71), a positioning rod (72) and an emergency limiting clamping piece (75) are arranged between the first annular plate (70) and the second annular plate (71) in a surrounding mode, the pressure spring (73) is sleeved on the periphery of the positioning rod (72), and a limiting contact ring (74) is 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, wherein said emergency limiting clamping member (75) comprises a first plate (750) and a second plate (751) which are movably connected, a first pivot seat (752) arranged on one side surface of said second plate (751), a first connecting rod (753) movably arranged between said two first pivot seats (752), a third pivot seat (755) arranged on said second annular plate (71), a second connecting rod (756) movably arranged between said two third pivot seats (755), and when said second annular plate (71) and said first annular plate (70) are stressed, said second connecting rod (756) drives a limiting plate (758) to be attached to the outer wall of said piston rod (68), and said first plate (750) and said second plate (751) make the same movement with said second connecting rod (756) so that said first pivot seat (752) and said first connecting rod (753) further attach to said limiting plate (758).
8. The multi-point hierarchical jacking structure of the limited space large-span structure of claim 7, wherein the piston rod (68) further comprises a positioning support structure (8), the positioning support structure (8) comprises a sleeve plate (80), support positioning plates (81) symmetrically arranged on two sides of the sleeve plate (80), a triangular plate (82) arranged on the other end of the support positioning plate (81), a first base (810) arranged on one end of the support positioning plate (81), a positioning clamping rod (811) arranged in the middle of the first base (810), a second base (812) arranged between the positioning clamping rods (811), reserved grooves (813) formed at two ends of the second base (812), second bolts (814) arranged in the reserved grooves (813), and arch-shaped openings (815) formed in the middle of the second base (812).
9. The multi-point hierarchical jacking structure of a limited space large span structure according to claim 8, wherein a first rod (83) and a second rod (84) are respectively provided on both side surfaces of the supporting and positioning plate (81), and a third bolt (85) connected with the first rod (83) and the second rod (84).
10. A construction method of a multi-point hierarchical jacking structure of a limited space large-span structure, comprising the steps of any one of claims 8-9;
S1, performing construction site investigation, defining a construction range and requirements, cleaning a construction site, and building a safe construction platform and a support;
S2, installing the steel bracket (1) on a foundation to ensure that the steel bracket is stable and can bear the weight of a subsequent structure;
S3, building the steel structure (2) on the steel bracket (1);
s4, connecting a plurality of steel pipe columns (40) by using the mounting seats (43), welding the square steel pipes (41) on the steel pipe columns (40), and welding the angle steel support frames (42) on the square steel pipes (41), so that the strength of the steel pipe columns (40) is improved;
s5, when the height requirement needs to be met, stacking the multi-section jig frame structures (4) in sequence, so that the supporting structure (6) can support the steel structure (2) and the supporting frame (3);
S6, after stacking of the jig frame structure (4) is completed, the supporting seat (680) in the supporting structure (6) is connected with a cross rod in the supporting frame (3), the cross rod is limited by the semicircular groove (681) and the center rod (683), so that the cross rod is fixed at the center position of the supporting seat (680) through the center rod (683), and meanwhile, the rubber pad (682) in the semicircular groove (681) increases friction force between the cross rod and the semicircular groove (681), so that stability is further improved;
S7, when the heights of the steel structure (2) and the top support frame (3) need to be further adjusted, the oil cylinder (67) and the piston rod (68) in the top support structure (6) drive the supporting seat (680) to move upwards, so that the heights of the steel structure (2) and the top support frame (3) can be accurately adjusted;
S8, thereby, 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 be further adjusted.
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