Jack-up multi-story steel structure and its construction method

Abstract

The invention discloses a jacking type multi-layer steel structure and a construction method thereof, which belongs to the steel structure construction technology, and comprises a bottom roof, a middle roof and a top roof, wherein the bottom roof, the middle roof and the top roof are all circular, and the diameters of the steel structures of the top roof and the middle roof gradually increase from top to bottom, wherein the center of the top roof protrudes upward to become a cone, and the edges of the middle roof and the bottom roof are arranged as downwardly curved eaves, and the top roof, the middle roof and the bottom roof are connected and supported by vertical steel structures, and the bottom roof is arranged on the ground through a support, and the bottom roof, the middle roof, the top roof, the vertical steel structure and the support form a temple of heaven structure, and a detachable jacking device is arranged between the bottom roof and the ground. The invention has uniform structure, clear layers, uniform pressure dispersion, stable structure, convenient operation, stable lifting, high safety factor, fast construction speed, high construction efficiency, high construction safety factor, good construction quality and remarkable effect.

Description

Technical Field

[0001] The invention belongs to the technical field of steel structure buildings, in particular to a jacking-type multi-layered temple-of-heaven-shaped steel structure building and a construction method of the steel structure building. Background Art

[0002] Steel structure is a structure made of steel materials. It is one of the main types of building structures. It is made of beams, steel columns, steel trusses and other components made of steel and steel plates, connected by welds, bolts or rivets. Because of its light weight and simple construction, it is widely used in large factories, venues, super high-rise buildings and other fields. Due to its high strength, light weight, good overall rigidity and strong resistance to deformation, it is particularly suitable for the construction of large-span, super-high and super-heavy buildings.

[0003] For some multi-story high-rise and super-high-rise steel structure buildings, most of them are constructed layer by layer from bottom to top. However, with the improvement of construction workstations, the difficulty of construction implementation is constantly increasing. The complex lines brought by the specific shape will have a great impact on the difficulty of welding and bolting. There is not even enough space to set up and adjust the work platform. Long-term high-altitude operations also add risks to the already very high risks for the workers.

[0004] In order to solve this problem, people have adopted the technology of lifting the whole building. The principle is to use a tray structure with greater rigidity to make the building form a movable body, and then use power equipment to apply a lifting force to the movable part of the building through jacking and supporting methods to lift it to the new location. Jacking is one of the technologies for lifting the whole building.

[0005] In the prior art, most buildings that are lifted by jacking are single-story or low-height buildings. For high-rise buildings, the lifting of high-rise buildings is achieved by improving the power equipment through horizontal and vertical synchronization or relay lifting. For example, Patent 201610882864.X, a method for synchronous construction of horizontal and vertical structures of super high-rise buildings, and Patent 201911198638.X, a relay lifting device and construction method, adopt similar solutions. This measure can cope with the lifting of some conventional structures, but it cannot achieve the corresponding effect for some steel structures with specific shapes. At the same time, the structural adjustment of the power equipment makes its structure more complicated, which is more prone to problems when dealing with ultra-high loads.

[0006] In addition, the construction and construction methods of some steel structures with larger spans have always been a problem. The larger the span, the more difficult it is to disperse the load and stress of the steel structure itself. If it is not effectively dispersed, it will cause rapid fatigue of the local metal structure and seriously reduce its service life. The problems presented by high-rise or super-high-rise large-span steel structures are more obvious.

[0007] Therefore, when constructing and lifting steel structure buildings with specific shapes and structures, people still need new technical solutions or improved solutions to meet the needs. Summary of the invention

[0008] In order to solve the deficiencies of the prior art, the present invention proposes a jacking-type multi-story steel structure and a construction method thereof, so as to construct and install a steel structure building with a Temple of Heaven-shaped appearance.

[0009] The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0010] The jacking-type multi-layer steel structure comprises a bottom roof with decreasing diameters from bottom to top, at least one middle roof and a single top roof, wherein the bottom roof, the middle roof and the top roof are all circular steel structures connected by steel sections, wherein the center of the top roof protrudes upward to form a cone, and the edges of the middle roof and the bottom roof are arranged as downwardly curved eaves, the top roof, the middle roof and the bottom roof are connected and supported by vertical steel structures, the bottom roof is arranged on the ground by supports, the bottom roof, the middle roof, the top roof, the vertical steel structures and the supports constitute a multi-layered Temple of Heaven structure, and a detachable jacking device is arranged between the bottom roof and the ground.

[0011] In the present invention, the bottom roof, the middle roof and the top roof all include radial steel beams and concentric annular steel purlins extending from the center to the periphery, and the annular steel purlins and the radial steel beams form a mesh structure.

[0012] Furthermore, the vertical steel structure is a vertically placed ring structure, both ends of the ring structure are fixedly connected to its adjacent layers respectively, and the ring structure of the vertical steel structure is concentrically arranged with the bottom roof, the middle roof and the top roof.

[0013] Furthermore, the annular steel purlins at the inner edges of the outer eaves of the middle roof and the bottom roof are the load-bearing areas, the lower ends of the vertical steel structures are fixedly connected to the load-bearing areas, and the upper ends of the vertical steel structures are fixedly connected to the outer eaves of the upper layer, or to the top roof near the edge.

[0014] In the present invention, the jacking device includes a jacking support, a hydraulic jacking jack, a hydraulic pump station, and a PLC control console. The upper end of the jacking support is connected to the lower side steel beam structure at the edge of the central area of the bottom floor. The jacking support is a lattice structure and includes several standard jacking support sections. The standard jacking support sections are connected by bolts and arranged vertically. Each standard jacking support section includes four columns. Each column is connected to the column of the previous standard jacking support section through a flange and bolts. Between the two columns of each standard jacking support section, there are two jacking frames. The jacking frames are horizontally connected to the upper or lower ends of the two columns respectively. Between the two jacking frames, there are two or four inclined reinforcing bars. The reinforcing bars are arranged in a V shape or an M shape. The two columns are fixedly connected to the two jacking frames and the reinforcing bars, forming a surface installation unit of the standard jacking support section. Each standard jacking support section includes two surface installation units, which are symmetrically arranged. The other two sides are detachably connected by jacking link rods. Each standard jacking support section includes two groups of jacking link rods. Each group of jacking link rods includes two cross bars and an inclined bar. The two ends of the cross bar are respectively hinged to the upper or lower ends of the two columns. The two ends of the inclined bar are respectively hinged to the upper end of one column and the lower end of the other column. The two groups of jacking link rods are symmetrically arranged. The hydraulic jacking jack includes a vertically arranged hydraulic cylinder. The upper end of the hydraulic cylinder is provided with an upper support, which is fixed on the topmost standard jacking support section. The lower end of the hydraulic cylinder is provided with a square lower support. The cross-sectional dimension of the lower support is smaller than the cross-sectional dimension of the standard jacking support section. The lower support moves up and down within the standard jacking support section. There are two separable cross beams arranged below the lower support. The cross beams are parallel to each other and are arranged on the symmetrically arranged jacking frames of the standard jacking support section.

[0015] Further, a displacement sensor is arranged on the hydraulic cylinder, and an oil pressure gauge is arranged on the hydraulic pump station. The PLC control console controls the opening or closing of the oil circuit solenoid valve through the displacement sensor on each hydraulic cylinder, and reads the oil pressure of the oil circuit through the oil pressure gauge on the hydraulic pump station, thereby driving the telescopic movement of the hydraulic cylinder.

[0016] Further, the maximum stroke of the hydraulic cylinder is 1.15 m or 0.77 m or 0.5 m, and the cross-sectional dimension of the standard jacking support section is 1.2 m × 1.2 m or 1.0 m × 1.0 m.

[0017] Based on the above jacking multi-layer steel structure, its construction method includes the following steps:

[0018] ① Install the central area of the bottom floor on the ground at the projection position of the entire multi-layer steel structure building. Sufficient temporary supports are arranged between the bottom floor and the ground.

[0019] ② Install the vertical steel structure on the bottom floor, and sequentially install the middle floor and the top floor upward.

[0020] ③ Several groups of lifting equipment are set between the bottom roof and the ground, and the lifting equipment is evenly arranged in a ring below the bottom roof;

[0021] ④ The lifting equipment starts lifting, adjusts the axis positions of the bottom steel structure, the middle steel structure and the top steel structure, adjusts the verticality of the lifting bracket, and removes the temporary support;

[0022] ⑤ The lifting equipment is lifted slightly higher than the coordinate height, the coordinates of the bottom roof, middle roof and top roof are adjusted, and the outer eaves and supports of the bottom roof are installed;

[0023] ⑥After welding is completed, adjust the overall axis and make the support bear force;

[0024] ⑦ Remove the jacking equipment and complete the construction process of the multi-story steel structure building.

[0025] In the lifting process of the lifting equipment in the above steps, the lifting process includes the following steps:

[0026] ①The hydraulic lifting jack is installed in the standard section of the lifting bracket, and the upper support of the hydraulic cylinder is fixed to the standard section of the uppermost lifting bracket;

[0027] ② The hydraulic cylinder contracts, and the lower support of the hydraulic cylinder is lifted within the standard section of the jacking bracket;

[0028] ③After the hydraulic cylinder is retracted, pass the two beams through the upper and lower supports of the standard section of the jacking bracket;

[0029] ④ Loosen the connecting bolts between the two adjacent standard sections of the jacking brackets, the hydraulic cylinder begins to extend, the lower end of the hydraulic cylinder presses against the crossbeam, and the upper support of the hydraulic cylinder is pushed upward, so that the two adjacent standard sections of the jacking brackets are separated;

[0030] ⑤ After the hydraulic cylinder is extended, the two surface installation units are arranged symmetrically, and the connection bolts with the upper and lower jacking bracket standard sections are connected respectively. Then, the jacking link rod between the two surface installation units is installed. After the tightening is completed, the jacking of a jacking bracket standard section is realized;

[0031] ⑥ Contract the hydraulic cylinder so that the lower support of the hydraulic cylinder is lifted within the standard section of the lifting bracket;

[0032] ⑦ Take out the two beams under the lower support of the hydraulic cylinder and repeat steps ③-⑤ to achieve section-by-section lifting.

[0033] Compared with the prior art, the present invention has the following advantages:

[0034] ① The ring-shaped steel purlins and radial steel beams of the multi-layer steel structure form a mesh structure. The structure of each layer of steel structure is reasonable and the pressure is evenly dispersed;

[0035] ② The annular vertical steel structure is set concentrically with the multi-layer steel structure to connect the upper and lower steel structures, and the pressure of the upper steel structure is loaded to the load-bearing area of ​​the lower steel structure, with clear layers and reasonable pressure guidance;

[0036] ③The support is the part with the highest load-bearing capacity, which evenly directs the received pressure to the ground, so that the overall load of the multi-story steel structure is even and the service life is long;

[0037] ④ The lifting equipment is lifted section by section through the standard sections of the lifting bracket, with simple structure, convenient operation, stable lifting and high safety factor;

[0038] ⑤ The Temple of Heaven-like structure of the entire multi-story steel structure building can effectively disperse wind pressure when subjected to high-altitude wind pressure, and can also maintain the stability of the overall structure when encountering natural disasters such as earthquakes;

[0039] ⑥The installation process of multi-story steel structure buildings is clear and orderly. During the jacking stage, the unified adjustment of the PLC control center can quickly and smoothly realize the lifting of the entire building. The construction speed is fast, the construction efficiency is high, the construction safety factor is high, the construction quality is good, and the effect is remarkable. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0041] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention (including the lifting equipment);

[0042] Figure 3 It is the overall axonometric diagram of the present invention;

[0043] Figure 4 It is an axonometric view of the bottom floor roof of the present invention;

[0044] Figure 5 is a floor plan of the roof of the ground floor of the present invention;

[0045] Figure 6 It is an axonometric view of the middle roof of the present invention;

[0046] Figure 7 is a plan view of the middle roof of the present invention;

[0047] Figure 8 It is an axonometric view of the top roof of the present invention;

[0048] Figure 9 is a top floor roof plan of the present invention;

[0049] Figure 10 It is a partial cross-sectional view of the bottom roof of the present invention;

[0050] Figure 11 It is a partial cross-sectional view of the middle roof of the present invention;

[0051] Figure 12 It is a partial cross-sectional view of the top roof of the present invention;

[0052] Figure 13 It is a first vertical steel structure cross-sectional view of the present invention;

[0053] Figure 14 It is a second vertical steel structure cross-sectional view of the present invention;

[0054] Figure 15 It is a partial structural schematic diagram of the jacking equipment of the present invention;

[0055] Figure 16 It is a schematic diagram of the surface installation unit structure of the standard section of the jacking support of the present invention;

[0056] Figure 17 It is a side structural schematic diagram of the standard section of the jacking support of the present invention;

[0057] Figure 18 It is a structural schematic diagram of the hydraulic lifting jack of the present invention;

[0058] Figures 19 - 30 It is a step diagram of the construction method of the jacking type multi-layer steel structure of the present invention;

[0059] Figures 31 - 33 It is a working principle diagram of the lifting link of the present invention;

[0060] Figure 34 It is a schematic diagram of the color display of the structural stress ratio of the present invention.

[0061] In the figure: bottom roof 1, middle roof 2, top roof 3, first vertical steel structure 4, second vertical steel structure 5, outer eaves 6, support 7, jacking equipment 8, jacking bracket standard section 9, column 10, jacking frame 11, reinforcement rod 12, hydraulic jacking jack 13, cross beam 14, jacking connecting rod 15, upper support 16, lower support 17. DETAILED DESCRIPTION

[0062] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0063] Jack-up multi-storey steel structure, such as Figures 1 - 18As shown, it includes a bottom roof 1, a middle roof 2 and a top roof 3. The bottom roof 1, the middle roof 2 and the top roof 3 are all circular steel structures connected by steel sections. The diameters of the steel structures of the top roof 3 and the middle roof 2 gradually increase from top to bottom. The center of the top roof 3 protrudes upward to form a cone. The edges of the middle roof 2 and the bottom roof 1 are set as downward curved eaves 6. The top roof 3, the middle roof 2 and the bottom roof 1 are connected and supported by vertical steel structures. The bottom roof 1 is set on the ground through a support 7. The bottom roof 1, the middle roof 2, the top roof 3, the vertical steel structure and the support 7 form a multi-layer Temple of Heaven structure. A detachable jacking device 8 is set between the bottom roof 1 and the ground.

[0064] The bottom roof 1, the middle roof 2 and the top roof 3 all include concentric annular steel purlins and radial steel beams extending from the center to the periphery. The annular steel purlins and the radial steel beams constitute a mesh structure. The vertical steel structure is a vertically placed annular structure, and the two ends of the annular structure are fixedly connected to its adjacent layers respectively; the annular structure of the vertical steel structure is concentrically arranged with the bottom roof 1, the middle roof 2 and the top roof 3, and the annular steel purlins at the inner edges of the outer eaves 6 of the middle roof 2 and the bottom roof 1 are the load-bearing areas. The lower end of the vertical steel structure is fixedly connected to the load-bearing area, and the upper end of the vertical steel structure is fixedly connected to the outer eaves 6 of the upper layer, or is fixedly connected to the top roof 3 near the edge.

[0065] In the present invention, the jacking type multi-layer steel structure of the Temple of Heaven is a three-layer steel structure building, that is, the middle roof 2 is a layer of steel structure, and the vertical steel structure includes a first vertical steel structure 4 and a second vertical steel structure 5 arranged concentrically. The first vertical steel structure 4 connects the middle steel 2 with the bottom roof 1 and supports the middle roof 2. The first vertical steel structure 4 is as shown in FIG. Figure 13 As shown, the second vertical steel structure 5 connects the top roof 3 and the bottom roof 1 and supports the top roof 3. The structure of the second vertical steel structure 5 is as shown in FIG. Figure 14 shown.

[0066] In the present invention, the jack-up multi-story steel structure of the Temple of Heaven can effectively disperse the load, mainly through the following aspects: (1) The entire steel structure is connected by straight steel bars or steel pipes, and the annular steel purlins and radial steel beams of the bottom roof 1, the middle roof 2, and the top roof 3 are partially connected by straight steel bars or steel pipes. The outlines of these sheet-like steel structures are all formed by straight steel pipes, which are mutually inclined by straight steel bars or steel pipes, such as Figure 4 , Figure 6 , Figure 8 Axonometric drawings of the bottom roof 1, the middle roof 2, and the top roof 3, and Figures 10 - 12The local cross-sectional view shows that these connection points constitute nodes for distributing the load. Each node on the radial steel beam can realize a load distributing unit with each radial steel beam as a unit. Thus, the profile coordination node realizes the dispersion of the load pressure. (2) The outer eaves 6 area of ​​the bottom roof 1, the outer eaves 6 area of ​​the middle roof 2, and the top roof 3 are all independent load distributing areas, which are composed of their inner and outer peripheral annular profiles and radial steel beams connected between the inner and outer peripheries, so as to realize surface load dispersion. At the same time, the central area of ​​the bottom roof 1 and the central area of ​​the middle roof 2 are also independent load distributing areas, which are shared by their radial steel beams to carry out surface load dispersion. The load pressure from the first vertical steel structure 4 and the second vertical steel structure 5; (3) Since the radial steel beams of the bottom roof 1, the middle roof 2, and the top roof 3 correspond to each other and are connected by the first vertical steel structure 4 and the second vertical steel structure 5, a radial steel beam from the corresponding position of the bottom roof 1, the middle roof 2, and the top roof 3 can be regarded as a group of load units, and the linear steel pipes of the first vertical steel structure 4 connecting the corresponding bottom roof 1 and the middle roof 2, the linear steel pipes of the second vertical steel structure 5 connecting the corresponding bottom roof 1 and the top roof 3, and the corresponding steel pipes in the support 7 together realize the load pressure dispersion of the above load units. Therefore, through the above-mentioned structural setting, the jacking-type multi-layer steel structure of the Temple of Heaven can effectively disperse the load and improve the service life of the building.

[0067] The calculated stress ratio of steel structure is the ratio of the stress of steel under various load combinations to the stress it can withstand, such as Figure 34 According to the color distribution of components in the figure, the calculated stress ratio of most components is less than 0.5, the calculated stress ratio of a small number of components is between 0.5 and 0.9, and the calculated stress ratio of very few components is displayed in yellow, that is, it is greater than 0.9 and less than 1. No components showing red, that is, the calculated stress exceeds the stress limit, are found. Overall, the design requirements are met.

[0068] like Figures 15 - 18The jacking equipment shown includes a jacking bracket, a hydraulic jacking jack 13, a hydraulic pump station and a PLC control console. The upper end of the jacking bracket is connected to the lower side steel beam structure at the edge of the central area of ​​the bottom roof 1. The jacking bracket is a lattice structure, including a plurality of jacking bracket standard sections 9. The jacking bracket standard sections 9 are connected to the jacking bracket standard sections 9 by bolts and arranged up and down; each jacking bracket standard section 9 includes four columns 10, each column 10 is connected to the column 10 of the previous jacking bracket standard section 9 by flanges and bolts, and two jacking frames 11 are arranged between the two columns 10 of each jacking bracket standard section 9. The jacking frames 11 are horizontally connected to the upper ends or lower ends of the two columns 10, respectively. Four oblique reinforcing rods 12 are arranged between the frames 11, and the reinforcing rods 12 are arranged in an M shape. The two columns 10 are fixedly connected to the two lifting frames 11 and the reinforcing rods 12, forming a surface installation unit of the standard section of the lifting bracket; each standard section 9 of the lifting bracket includes two surface installation units, the two surface installation units are arranged symmetrically, and the other two side surfaces are detachably connected by a lifting link rod 15; each standard section 9 of the lifting bracket includes two groups of lifting link rods 15, each group of lifting link rods 15 includes two cross bars and diagonal bars, the two ends of the cross bars are respectively hinged to the upper end or lower end of the two columns 10, the two ends of the diagonal bars are respectively hinged to the upper end of one column 10 and the lower end of the other column 10, and the two groups of lifting link rods 15 are symmetrically arranged.

[0069] The hydraulic lifting jack 13 includes a vertically arranged hydraulic cylinder, an upper support 16 is provided at the upper end of the hydraulic cylinder, and the upper support 16 is fixed on the uppermost lifting bracket standard section 9, and a square lower support 17 is provided at the lower end of the hydraulic cylinder. The cross-sectional dimension of the lower support 17 is smaller than the cross-sectional dimension of the lifting bracket standard section 9, and the lower support 17 moves up and down in the lifting bracket standard section 9. Two detachable cross beams 14 are provided below the lower support 17. The cross beams 14 are parallel to each other and are passed through the symmetrically arranged lifting frame 11 of the lifting bracket standard section 9; a displacement sensor is provided on the hydraulic cylinder, and an oil pressure gauge is provided on the hydraulic pump station. The PLC control center controls the opening or closing of the oil circuit solenoid valve through the displacement sensor on each hydraulic cylinder, and reads the oil pressure of the oil circuit through the oil pressure gauge on the hydraulic pump station, thereby driving the extension and retraction of the hydraulic cylinder.

[0070] The maximum stroke of the hydraulic cylinder is 1.15m or 0.77m or 0.5m, and the cross-sectional dimensions of the standard section of the jacking support are 1.2m×1.2m or 1.0m×1.0m. In the present invention, the selected standard section dimensions of the jacking support are 1.0m×1.0m×0.77m.

[0071] In the present invention, as a specific implementation case, the jack-up multi-storey steel structure of the present invention is used as a theater. At this time, considering the setting of the stage in the theater, the ground needs to be processed separately, so that the projection position of the multi-storey steel structure building on the ground needs to be treated differently. Then, the main frame installation construction method of the theater based on the jack-up multi-storey steel structure constructed above specifically includes the following steps:

[0072] ① Install the central area of ​​the bottom roof on the projection position of the entire multi-story steel structure building, add sufficient temporary support, and prepare four sets of jacking equipment at the stage position of the grand theater projection and arrange them at an appropriate time, such as Figure 19 As shown; when the bottom roof is installed, nine more temporary lifting points are added in time;

[0073] ② Install vertical steel structure on the bottom roof, such as Figure 20 As shown;

[0074] ③Continue to install the middle roof and its eaves, such as Figure 21 As shown;

[0075] ④Continue to install the top roof, such as Figure 22 As shown, at this time, the main structure of the multi-story steel structure is basically completed;

[0076] ⑤ Set up lifting equipment between the bottom roof and the ground, such as Figure 23 As shown, the lifting equipment set at the lifting point of the stage position of the Grand Theater projection adopts a standard hydraulic cylinder, and the lifting equipment set at the nine temporary lifting points adopts a small-stroke hydraulic cylinder;

[0077] ⑥ Lift the roof several times to make the bottom of the ground floor 1.6m above the ground. Figure 24 As shown, it is convenient to replace the jacking equipment at the temporary jacking point;

[0078] ⑦ Replace the temporary lifting points with nine new lifting points, and set up lifting equipment using standard hydraulic cylinders. The replacement lifting points are distributed as follows: Figure 25 As shown;

[0079] ⑧After the replacement is completed, remove the jacking equipment at the temporary jacking point, such as Figure 26 As shown;

[0080] ⑨ The lifting equipment starts lifting, adjust the axis position of the bottom steel structure, the middle steel structure and the top steel structure, adjust the verticality of the lifting support, and remove the temporary support, such as Figure 27 As shown;

[0081] ⑩ The lifting equipment is lifted slightly higher than the coordinate height, and the outer eaves and top steel structure of the middle steel structure are installed and adjusted by crane, such as Figure 28 As shown;

[0082] ⑪ Adjust the coordinates of the bottom roof, middle roof and top roof, and install the supports, such as Figure 29 As shown;

[0083] ⑫After welding is completed, adjust the overall axis and make the support bear force;

[0084] ⑬Remove the lifting equipment, such as Figure 30 As shown, the entire construction process of the multi-story steel structure building is completed.

[0085] In addition, in the jacking link of the above steps, the jacking process of the jacking equipment includes the following steps:

[0086] ①The hydraulic lifting jack is installed in the standard section of the lifting bracket, and the upper support of the hydraulic cylinder is fixed to the standard section of the uppermost lifting bracket;

[0087] ② The hydraulic cylinder contracts, and the lower support of the hydraulic cylinder is lifted within the standard section of the jacking bracket;

[0088] ③After the hydraulic cylinder is retracted, pass the two beams through the upper and lower supports of the standard section of the jacking bracket, such as Figure 31 As shown;

[0089] ④ Loosen the connecting bolts between the two adjacent lifting bracket standard sections, the hydraulic cylinder begins to extend, the lower end of the hydraulic cylinder supports the crossbeam, and the upper support of the hydraulic cylinder is pushed upward, so that the two adjacent lifting bracket standard sections are separated. Figure 32 As shown;

[0090] ⑤ After the hydraulic cylinder is extended, the two surface installation units are arranged symmetrically, and the connection bolts with the upper and lower jacking bracket standard sections are connected respectively. Then, the jacking link rod between the two surface installation units is installed. After the tightening is completed, the jacking of a jacking bracket standard section is realized;

[0091] ⑥ Contract the hydraulic cylinder so that the lower support of the hydraulic cylinder is lifted within the standard section of the jacking bracket, such as Figure 33 As shown;

[0092] ⑦ Take out the two beams under the lower support of the hydraulic cylinder and repeat steps ③-⑤ to achieve section-by-section lifting.

[0093] In the present invention, the multi-layer steel structure of the Temple of Heaven is not limited to the middle roof of the single-layer structure described in the above embodiment. The middle steel structure of the two-layer or even multi-layer steel structure is also suitable for the above structure and installation construction method.

[0094] Therefore, in combination with the above-mentioned structure and installation construction method, it can be found that the jacking-type multi-story steel structure described in the present invention has a uniform structure, clear layers, uniform pressure dispersion, stable structure, convenient operation, smooth lifting, and a high safety factor. The installation method of the jacking-type multi-story steel structure has a fast construction speed, high construction efficiency, high construction safety factor, good construction quality, and significant effect.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Jack-up multi-layer steel structure, Features: It includes a bottom roof with decreasing diameters from bottom to top, at least one middle roof and a single top roof. The bottom roof, middle roof and top roof are all circular steel structures connected by steel sections. The center of the top roof protrudes upward to form a cone. The edges of the middle roof and the bottom roof are set as downward curved eaves. The top roof, middle roof and bottom roof are connected and supported by vertical steel structures. The bottom roof is set on the ground through supports. The bottom roof, middle roof, top roof, vertical steel structures and supports form a multi-layer Temple of Heaven structure. A detachable jacking device is set between the bottom roof and the ground.

2. The jacking-type multi-storey steel structure according to claim 1, Features: The bottom roof, the middle roof and the top roof all include radial steel beams and concentric annular steel purlins extending from the center to the periphery, and the annular steel purlins and the radial steel beams form a mesh structure.

3. The jacking-type multi-storey steel structure according to claim 2, Features: The vertical steel structure is a vertically placed ring structure, both ends of which are fixedly connected to the adjacent layers respectively, and the ring structure of the vertical steel structure is concentrically arranged with the bottom roof, the middle roof and the top roof.

4. The jacking-type multi-storey steel structure according to claim 3, Features: The annular steel purlins at the inner edges of the outer eaves of the middle roof and the bottom roof are the load-bearing areas, the lower ends of the vertical steel structures are fixedly connected to the load-bearing areas, and the upper ends of the vertical steel structures are fixedly connected to the outer eaves of the upper layer, or to the top roof near the edge.

5. The jacking-type multi-storey steel structure according to claim 1, Features: The jacking equipment includes a jacking bracket, a hydraulic jacking jack, a hydraulic pump station and a PLC control console. The upper end of the jacking bracket is connected to the lower side steel beam structure at the edge of the central area of ​​the bottom roof. The jacking bracket is a lattice type, including a plurality of jacking bracket standard sections. The jacking bracket standard sections are connected to each other by bolts and arranged up and down; each jacking bracket standard section includes four columns, each column is connected to the column of the previous jacking bracket standard section by flanges and bolts, two jacking frames are arranged between the two columns of each jacking bracket standard section, the jacking frames are horizontally connected to the upper ends or lower ends of the two columns, and two or four oblique reinforcing rods are arranged between the two jacking frames, the reinforcing rods are arranged in a V shape or an M shape, and the two columns are fixedly connected to the two jacking frames and the reinforcing rods to form a surface installation unit of the jacking bracket standard section; each jacking bracket standard section includes The invention comprises two surface mounting units, which are symmetrically arranged, and the other two side surfaces are detachably connected by lifting link rods; each lifting bracket standard section comprises two groups of lifting link rods, and each group of lifting link rods comprises two cross bars and an oblique bar, and the two ends of the cross bars are respectively hinged at the upper end or the lower end of the two columns, and the two ends of the oblique bar are respectively hinged at the upper end of one column and the lower end of the other column, and the two groups of lifting link rods are symmetrically arranged; the hydraulic lifting jack comprises a vertically arranged hydraulic cylinder, and an upper support is arranged at the upper end of the hydraulic cylinder, and the upper support is fixed on the uppermost lifting bracket standard section, and a square lower support is arranged at the lower end of the hydraulic cylinder, and the cross-sectional dimension of the lower support is smaller than the cross-sectional dimension of the lifting bracket standard section, and the lower support moves up and down in the lifting bracket standard section, and two detachable cross beams are arranged below the lower support, and the cross beams are parallel to each other and are passed through the symmetrically arranged lifting frame of the lifting bracket standard section.

6. The jacking-type multi-storey steel structure according to claim 5, Features: The hydraulic cylinder is provided with a displacement sensor, and the hydraulic pump station is provided with an oil pressure gauge. The PLC control center controls the opening or closing of the oil circuit solenoid valve through the displacement sensor on each hydraulic cylinder, reads the oil pressure of the oil circuit through the oil pressure gauge on the hydraulic pump station, and then drives the extension and retraction of the hydraulic cylinder.

7. The jacking-type multi-storey steel structure according to claim 5, Features: The maximum stroke of the hydraulic cylinder is 1.15m or 0.77m or 0.5m, and the cross-sectional dimensions of the standard section of the jacking bracket are 1.2m×1.2m or 1.0m×1.0m.

8. Construction method of jacking multi-storey steel structure, Features: The following steps are involved: ①Install the central area of ​​the bottom roof on the projection ground of the entire multi-story steel structure building, and set up sufficient temporary support between the bottom roof and the ground; ② Install the vertical steel structure on the bottom roof, and then install the middle roof and top roof in sequence upwards; ③ Several groups of lifting equipment are set between the bottom roof and the ground, and the lifting equipment is evenly arranged in a ring below the bottom roof; ④ The lifting equipment starts lifting, adjusts the axis positions of the bottom steel structure, the middle steel structure and the top steel structure, adjusts the verticality of the lifting bracket, and removes the temporary support; ⑤ The lifting equipment is lifted slightly higher than the coordinate height, the coordinates of the bottom roof, middle roof and top roof are adjusted, and the outer eaves and supports of the bottom roof are installed; ⑥After welding is completed, adjust the overall axis and make the support bear force; ⑦ Remove the jacking equipment and complete the construction process of the multi-story steel structure building.

9. The construction method of the jacking type multi-story steel structure according to claim 8, Features: The lifting process of the lifting device comprises the following steps: ①The hydraulic lifting jack is installed in the standard section of the lifting bracket, and the upper support of the hydraulic cylinder is fixed to the standard section of the uppermost lifting bracket; ② The hydraulic cylinder contracts, and the lower support of the hydraulic cylinder is lifted within the standard section of the jacking bracket; ③After the hydraulic cylinder is retracted, pass the two beams through the upper and lower supports of the standard section of the jacking bracket; ④ Loosen the connecting bolts between the two adjacent standard sections of the jacking brackets, the hydraulic cylinder begins to extend, the lower end of the hydraulic cylinder presses against the crossbeam, and the upper support of the hydraulic cylinder is pushed upward, so that the two adjacent standard sections of the jacking brackets are separated; ⑤ After the hydraulic cylinder is extended, the two surface installation units are arranged symmetrically, and the connection bolts with the upper and lower jacking bracket standard sections are connected respectively. Then, the jacking link rod between the two surface installation units is installed. After the tightening is completed, the jacking of a jacking bracket standard section is realized; ⑥ Contract the hydraulic cylinder so that the lower support of the hydraulic cylinder is lifted within the standard section of the lifting bracket; ⑦ Take out the two beams under the lower support of the hydraulic cylinder and repeat steps ③-⑤ to achieve section-by-section lifting.

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