Construction method of annular steel structure

Abstract

The invention belongs to the technical field of steel structure building construction, and discloses a construction method of an annular steel structure. The construction method of the annular steel structure comprises the following steps that finite element software is used for simulating construction, and a preset pushing distance is determined; a foundation structure is constructed at the position to be constructed, and an annular track is arranged on the foundation structure; the initial truss assembly is spliced, a pushing moving assembly is arranged on the initial truss assembly, and the initial truss assembly is pushed to leave the hoisting station through the pushing moving assembly; splicing the truss units, fixedly connecting the truss units and the initial truss assembly, and arranging pushing moving assemblies on the truss units; pushing the truss unit to leave the hoisting station; the operation is repeated, the truss units are spliced one by one and pushed until splicing is completed, and an annular steel structure is formed; and the foundation structure and the like are disassembled, a permanent supporting structure is constructed, and the annular steel structure falls on and is connected to the permanent supporting structure. The construction method can shorten the construction period and reduce waste of construction materials.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure building construction, and particularly to a construction method for a circular steel structure. Background Art

[0002] With the rapid development of social economy, people's demand for buildings is no longer limited to providing shelter from wind and rain, but they pay more attention to the functionality, aesthetics and space utilization rate of buildings. Due to its unique advantages, such as light self-weight, fast construction speed, beautiful shape, etc., steel structure roofs have been widely used in various buildings. In order to make full use of space, some large buildings (such as stadiums, hospitals, etc.) are usually designed in a circular shape. Therefore, this type of building requires a corresponding circular steel structure roof to be constructed.

[0003] In the prior art, the construction of a circular steel structure roof is usually carried out by using the prefabrication method in combination with the jacking method. First, a continuous circular track is laid on the roof of the building. Then, a part of the steel structure roof is spliced and placed on the track, and then it is jacked to move along the track. After that, another part of the steel structure roof is spliced and placed on the track, and the steel structure roofs before and after are connected and fixed. The connected steel structure roof is jacked and moved, and then the above operations are repeated until the entire steel structure roof is spliced. Obviously, the above construction method is only applicable to laying the steel structure roof on a continuous and uninterrupted track. When constructing a steel structure roof on the roof of a large-span space, if the jacking method is still used for construction, it is usually necessary to weld a steel guide beam at the front end of the steel structure to guide the steel structure to move forward along the predetermined trajectory. After the steel structure in the large-span section is jacked, the steel guide beam at the front end needs to be disassembled. On the one hand, the operation process is cumbersome, time-consuming, and the work efficiency is low, and the labor intensity of the staff is relatively large. On the other hand, it will also cause material loss and increase the construction cost. Summary of the Invention

[0004] The purpose of the present invention is to provide a construction method for a circular steel structure, which can not only reduce the construction procedures, shorten the construction period, improve the work efficiency, but also reduce the waste of construction materials and the construction cost.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] Provide a construction method for a circular steel structure. The circular steel structure includes a plurality of truss units, and the plurality of truss units are spliced end to end in sequence to enclose and form the circular steel structure. The truss unit includes a circular main truss and four circular secondary trusses. The four circular secondary trusses are radially arranged on both sides of the circular main truss. The construction method for the circular steel structure is characterized by including the following steps:

[0007] S1. Using finite element software to establish a construction model of a finite element circular ring steel structure, and performing a construction simulation analysis on the construction model of the finite element circular ring steel structure to determine a preset jacking distance of the truss unit;

[0008] S2, constructing a foundation structure at the location to be constructed, and laying a circular track on the foundation structure;

[0009] S3, splicing one of the annular secondary trusses on both sides of the rear end of the annular main truss in the radial direction to form an initial truss assembly, and setting two pushing moving assemblies at the head and tail ends of the annular main truss of the initial truss assembly, respectively, and the arc length of the annular secondary truss is equal to half of the arc length of the annular main truss;

[0010] S4, controlling the hoisting equipment to hoist the initial truss assembly to the hoisting station of the circular track, so that the pushing and moving assembly can slide with the circular track, and the pushing and moving assembly can move along the circular track;

[0011] S5, setting a temporary limiting piece on the annular track, the temporary limiting piece being spaced from the front end of the initial truss assembly by the preset pushing distance, braking the pushing moving assembly so that it drives the initial truss assembly to move along the annular track, until the pushing moving assembly at the front end of the initial truss assembly abuts against the temporary limiting piece, so that the temporary limiting piece limits the pushing moving assembly along the extension direction of the pushing moving assembly, and removing the temporary limiting piece;

[0012] S6, repeating step S5 until the initial truss assembly leaves the hoisting station;

[0013] S7, splicing the four annular secondary trusses onto the annular main truss to form the truss unit, respectively arranging two of the pushing moving assemblies at the head and tail ends of the annular main truss of the truss unit, and controlling the hoisting equipment to hoist the truss unit to the hoisting station of the annular track, so that the pushing moving assembly and the annular track are slidably matched;

[0014] S8, fixedly connecting the front end of the truss unit to the rear end of the initial truss assembly;

[0015] S9. Install the temporary limit member on the annular track. The temporary limit member is spaced from the front end of the initial truss assembly by the preset pushing distance. Brake the pushing and moving assemblies of the truss unit and the initial truss assembly so that they drive the truss unit and the initial truss assembly along the annular track until the pushing and moving assembly at the front end of the initial truss assembly abuts against the temporary limit member, so that the temporary limit member limits the pushing and moving assembly along the extending direction of the pushing and moving assembly, and then remove the temporary limit member;

[0016] S10. Repeat step S9 until the truss unit at the hoisting station leaves the hoisting station;

[0017] S11. Repeat step S7 and fixedly connect two adjacent truss units;

[0018] S12. Repeat step S9 and step S10;

[0019] S13. Repeat step S11 and S12 until the last truss unit is hoisted to the hoisting station and any two adjacent truss units are fixedly connected;

[0020] S14. Splice one annular secondary truss on each of the two sides along the radial direction at the front end of the annular main truss of the initial truss assembly to form the truss unit, and fixedly connect the front end of the truss unit to the rear end of the last truss unit to form the circular steel structure;

[0021] S15. Control the jacking mechanism to jack up the circular steel structure vertically and remove the pushing and moving assembly, the annular track and the foundation structure;

[0022] S16. Construct a permanent support structure at the construction position to be constructed, control the jacking mechanism to drive the circular steel structure to move vertically so that the circular steel structure falls on the permanent support structure, and fixedly connect the circular steel structure and the permanent support structure.

[0023] Optionally, the foundation structure includes a first annular foundation beam, a second annular foundation beam, a plurality of first embedded parts and a plurality of second embedded parts. The inner diameter of the first annular foundation beam is greater than the inner diameter of the second annular foundation beam. The first annular foundation beam surrounds the outside of the second annular foundation beam. The plurality of first embedded parts are radially arranged on both sides of the first annular foundation beam and are spaced along the circumferential direction of the first annular foundation beam. The plurality of second embedded parts are radially arranged on both sides of the second annular foundation beam and are spaced along the circumferential direction of the second annular foundation beam. The step S2 specifically includes the following steps:

[0024] S211. Embedded multiple first embedded parts along the preset construction positions of the first annular foundation beam, and embedded multiple second embedded parts along the preset construction positions of the second annular foundation beam;

[0025] S212. Pour the roof floor slab, and construct the first annular foundation beam and the second annular foundation beam on the roof floor slab;

[0026] S213. Fix and connect the first embedded part and the first annular foundation beam, and the second embedded part and the second annular foundation beam;

[0027] S214. Lay one annular track on each of the first annular foundation beam and the second annular foundation beam.

[0028] Optionally, the foundation structure further includes a plurality of connecting cross beams. One end of each connecting cross beam is connected to the first annular foundation beam, and the other end is connected to the second annular foundation beam. The plurality of connecting cross beams are arranged at intervals along the circumferential direction of the annular foundation beam, and each connecting cross beam extends along the radial direction of the first annular foundation beam.

[0029] Optionally, the jacking and moving assembly includes an installation base, a first slider, a telescopic driving member, and a second slider. The truss unit is arranged at the upper end of the installation base. The first slider is arranged at the lower end of the installation base. One end of the telescopic driving member is rotatably connected to the installation base, and the other end is rotatably connected to the second slider to adjust the distance between the first slider and the second slider. The annular track is provided with a sliding groove, and the sliding groove extends along the circumferential direction of the annular track. The first slider and the second slider are both slidably clamped in the sliding groove;

[0030] A limiting clamping rod is arranged at one end of the second slider facing away from the telescopic driving member. A plurality of clamping grooves are arranged at intervals along the circumferential direction on the annular track. The inner wall of the clamping groove is provided with a guiding inclined surface, and the guiding inclined surface gradually extends upwardly along the direction from the second slider to the first slider. The limiting clamping rod has a first state of being clamped in the clamping groove and a second state of moving along the guiding inclined surface and away from the clamping groove.

[0031] Optionally, a plurality of limiting and centering components are arranged in the sliding groove of the annular track. The plurality of limiting and centering components are arranged at intervals along the extending direction of the sliding groove. The limiting and centering component includes two guiding wedges that are symmetrically arranged with respect to the center axis of the sliding groove and are spaced apart. The two guiding wedges enclose a limiting chamber, and the limiting chamber communicates with the inner cavity of the sliding groove. Each guiding wedge is provided with a guiding inclined surface, and the guiding inclined surface gradually inclines from the inner wall of the sliding groove to the center axis of the sliding groove for guiding the first slider or the second slider into the limiting chamber.

[0032] Optionally, the truss unit further includes a plurality of first temporary support structures. The plurality of first temporary support structures are arranged at intervals along the extending direction of the annular main truss, and the lower end of each first temporary support structure is arranged on the first annular foundation beam and the second annular foundation beam. The step S3 specifically includes the following steps:

[0033] S311. Splice one annular sub-truss on each of the two sides along the radial direction at the rear end of the annular main truss to form an initial truss assembly, and arrange a plurality of the first temporary support structures below the annular main truss;

[0034] S312. Determine whether the initial truss assembly and the first temporary support structures are qualified in flaw detection. If not, execute S313; if so, execute S314;

[0035] S313. Repair the initial truss assembly and the first temporary support structures, and then return to execute S312;

[0036] S314. Arrange the first temporary support structures at the head and tail ends of the annular main truss on the installation base of the jacking and moving assembly;

[0037] S315. Arrange a plurality of limiting components outside the annular track. Two limiting components are correspondingly arranged for each first temporary support structure. The two limiting components are respectively arranged on both sides of the first temporary support structure. The two limiting components are fixedly connected to the first temporary support structure, and one of the two limiting components is in sliding fit with the first annular foundation beam, and the other is in sliding fit with the first annular foundation beam or the second annular foundation beam.

[0038] Optionally, the step S5 specifically includes the following steps:

[0039] S511. Preset the pre-stop position of the initial truss assembly, arrange the limiting and centering components at the pre-stop position, and arrange a temporary limiting member on the annular track. The temporary limiting member is spaced from the front end of the initial truss assembly by the preset jacking distance;

[0040] S512. Set a second temporary support structure on the initial truss assembly. The second temporary support structure includes a support frame body and a connecting member. The support frame body is arranged on the annular main truss and extends vertically. One end of the connecting member is connected to the support frame body, and the other end is connected to the front end of the annular main truss for lifting the annular main truss upward.

[0041] S513. Brake the jacking and moving assembly to drive the initial truss assembly to move along the annular track until the jacking and moving assembly at the front end of the initial truss assembly abuts against the temporary limiting member, so that the temporary limiting member limits the jacking and moving assembly along the extending direction of the jacking and moving assembly.

[0042] S514. Dismantle the temporary limiting member.

[0043] Optionally, step S15 specifically includes the following steps:

[0044] S151. Control the jacking and moving assembly to drive the circular steel structure to move along the annular track so that the circular steel structure is located at a preset position.

[0045] S152. Control the lifting mechanism to lift the circular steel structure vertically and dismantle the jacking and moving assembly, the annular track, the foundation structure, the first temporary support structure and the second temporary support structure.

[0046] Optionally, step S16 specifically includes the following steps:

[0047] S161. Construct a permanent support structure at the position to be constructed, and control the lifting mechanism to drive the circular steel structure to move vertically so that the circular steel structure is located on the permanent support structure.

[0048] S162. Fix and connect the circular steel structure and the permanent support structure.

[0049] S163. Judge whether the circular steel structure and the permanent support structure are qualified in flaw detection. If not, execute S164; if so, execute S165.

[0050] S164. Repair the circular steel structure and the permanent support structure, and then return to execute S163.

[0051] S165. End the construction.

[0052] Optionally, the lifting mechanism includes a hydraulic jack.

[0053] Advantages of the present invention:

[0054] The present invention provides a construction method for a circular steel structure, and the circular steel structure includes a plurality of truss units spliced end to end in sequence. When constructing the circular steel structure in a large-span area, multiple truss units are spliced in segments and the overall jacking method is used for jacking construction. When splicing the first truss unit, only two circular secondary trusses are spliced at the rear end of the circular main truss, that is, there are no components on both sides of the front end of the circular main truss. Thus, it can be seen that the circular main truss can be used as a steel guide beam structure. When moving the truss unit by the jacking method, it can guide the truss unit to move along the circular track. Therefore, there is no need to set up a steel guide beam structure at the front end of the truss unit again, which can reduce the construction and demolition processes of the steel guide beam structure, thereby shortening the construction period, improving work efficiency, reducing the workload of the staff, and reducing the waste of construction materials and construction costs. Description of the Drawings

[0055] Figure 1 is a flowchart of the construction method for the circular steel structure provided by the embodiment of the present invention;

[0056] Figure 2 is the first side view when splicing the initial truss assembly in the construction method for the circular steel structure provided by the embodiment of the present invention;

[0057] Figure 3 is the second side view when splicing the initial truss assembly in the construction method for the circular steel structure provided by the embodiment of the present invention;

[0058] Figure 4 is a schematic structural diagram of the limiting component provided by the embodiment of the present invention;

[0059] Figure 5 is a schematic structural diagram of the jacking and moving component provided by the embodiment of the present invention;

[0060] Figure 6 is a schematic structural diagram of the limiting and centering component provided by the embodiment of the present invention;

[0061] Figure 7 is the top view when splicing the initial truss assembly in the construction method for the circular steel structure provided by the embodiment of the present invention;

[0062] Figure 8 is the top view when splicing the second truss unit in the construction method for the circular steel structure provided by the embodiment of the present invention;

[0063] Figure 9 is the top view when splicing the last truss unit in the construction method for the circular steel structure provided by the embodiment of the present invention;

[0064] Figure 10It is a top view when splicing to form a circular steel structure in the construction method of the circular steel structure provided by the embodiment of the present invention.

[0065] In the figure:

[0066] 100, roof floor slab; 200, hoisting equipment;

[0067] 1, circular steel structure; 11, truss unit; 111, circular main truss; 112, circular secondary truss; 113, first temporary support structure; 12, initial truss assembly;

[0068] 2, foundation structure; 21, first circular foundation beam; 22, second circular foundation beam; 23, first embedded part; 24, second embedded part; 25, connecting cross beam;

[0069] 3, circular track; 31, sliding groove; 32, guiding inclined plane;

[0070] 4, jacking and moving assembly; 41, installation base; 42, first slider; 43, telescopic driving part; 44, second slider; 45, limiting clamping rod;

[0071] 5, temporary limiting part;

[0072] 6, limiting and centering assembly; 61, guiding wedge block; 62, limiting chamber; 63, guiding inclined plane;

[0073] 7, limiting assembly; 71, connecting frame; 72, first connecting frame; 73, second connecting frame; 74, connecting screw; 75, fastening nut; 76, translation slider; 77, limiting frame;

[0074] 8, second temporary support structure; 81, support frame body. Detailed implementation manners

[0075] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all structures.

[0076] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0077] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0078] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0079] This embodiment provides a construction method for a circular steel structure, as Figures 1 to 10 shown. Using this construction method to construct the circular steel structure 1 roof in a large-span space can not only reduce the construction procedures, shorten the construction period, improve the work efficiency, but also reduce the waste of construction materials and the construction cost.

[0080] The circular steel structure 1 includes a plurality of truss units 11, and the plurality of truss units 11 are sequentially spliced end to end to enclose and form the circular steel structure 1. The truss unit 11 includes an annular main truss 111 and four annular secondary trusses 112, and the four annular secondary trusses 112 are radially arranged on both sides of the annular main truss 111. The construction method of the circular steel structure includes the following steps:

[0081] S1. Referring to Figure 1 shown, use finite element software to establish a construction model of the finite element circular steel structure 1, and perform construction simulation analysis on the construction model of the finite element circular steel structure 1 to determine the preset jacking distance of the truss unit 11;

[0082] S2. Referring to Figures 1 to 3 shown, construct the foundation structure 2 at the position to be constructed, and lay the annular track 3 on the foundation structure 2;

[0083] S3. Referring to Figure 1 , Figure 2 , Figure 3 and Figure 7As shown, on both sides of the rear end of the annular main truss 111 along the radial direction, an annular secondary truss 112 is spliced respectively to form an initial truss assembly 12. Two jacking and moving assemblies 4 are arranged at the head and tail ends of the annular main truss 111 of the initial truss assembly 12 respectively. The arc length of the annular secondary truss 112 is equal to half of the arc length of the annular main truss 111.

[0084] S4. Refer to Figure 1 、and Figure 7 As shown, control the hoisting device 200 to hoist the initial truss assembly 12 to the hoisting station on the annular track 3 so that the jacking and moving assembly 4 is in sliding fit with the annular track 3, and the jacking and moving assembly 4 can move along the annular track 3.

[0085] S5. Refer to Figure 1 、 Figure 2 and Figure 6 As shown, a temporary limiting member 5 is arranged on the annular track 3. The temporary limiting member 5 is spaced from the front end of the initial truss assembly 12 by a preset jacking distance. Brake the jacking and moving assembly 4 to drive the initial truss assembly 12 to move along the annular track 3 until the jacking and moving assembly 4 at the front end of the initial truss assembly 12 abuts against the temporary limiting member 5, so that the temporary limiting member 5 limits the jacking and moving assembly 4 along the extending direction of the jacking and moving assembly 4, and then remove the temporary limiting member 5.

[0086] S6. Refer to Figure 1 As shown, repeat step S5 until the initial truss assembly 12 leaves the hoisting station.

[0087] S7. Refer to Figure 1 and Figure 8 As shown, splice four annular secondary trusses 112 onto the annular main truss 111 to form a truss unit 11. Two jacking and moving assemblies 4 are arranged at the head and tail ends of the annular main truss 111 of the truss unit 11 respectively. Control the hoisting device 200 to hoist the truss unit 11 to the hoisting station on the annular track 3 so that the jacking and moving assembly 4 is in sliding fit with the annular track 3.

[0088] S8. Refer to Figure 1 As shown, fixedly connect the front end of the truss unit 11 to the rear end of the initial truss assembly 12.

[0089] S9. Refer to Figure 1 and Figure 6As shown, a temporary limiting member 5 is arranged on the annular track 3. The temporary limiting member 5 is spaced from the front end of the initial truss assembly 12 by a preset pushing distance. The pushing and moving assemblies 4 of the braking truss unit 11 and the initial truss assembly 12 are pushed, so as to drive the truss unit 11 and the initial truss assembly 12 along the annular track 3 until the pushing and moving assembly 4 at the front end of the initial truss assembly 12 abuts against the temporary limiting member 5, so that the temporary limiting member 5 limits the pushing and moving assembly 4 along the extending direction of the pushing and moving assembly 4, and the temporary limiting member 5 is disassembled;

[0090] S10. Refer to Figure 1 As shown, repeat step S9 until the truss unit 11 on the hoisting station leaves the hoisting station;

[0091] S11. Refer to Figure 1 As shown, repeat step S7 and fixedly connect two adjacent truss units 11;

[0092] S12. Refer to Figure 1 As shown, repeat step S9 and step S10;

[0093] S13. Refer to Figure 1 and Figure 8 As shown, repeat step S11 and S12 until the last truss unit 11 is hoisted to the hoisting station and any two adjacent truss units 11 are fixedly connected;

[0094] S14. Refer to Figure 1 、 Figure 9 and Figure 10 As shown, on both sides of the front end of the annular main truss 111 of the initial truss assembly 12 along the radial direction, an annular secondary truss 112 is spliced respectively to form a truss unit 11, and the front end of the truss unit 11 is fixedly connected to the rear end of the last truss unit 11 to form a circular steel structure 1;

[0095] S15. Refer to Figure 1 As shown, control the jacking mechanism to jack up the circular steel structure 1 vertically, and disassemble the pushing and moving assembly 4, the annular track 3 and the foundation structure 2;

[0096] S16. Refer to Figure 1 As shown, construct a permanent support structure at the position to be constructed, control the jacking mechanism to drive the circular steel structure 1 to move vertically, so that the circular steel structure 1 falls on the permanent support structure, and fixedly connect the circular steel structure 1 and the permanent support structure.

[0097] When constructing the circular steel structure 1, the jacking method is adopted as a whole. First, a construction model is established using finite element software, and the preset jacking distance is determined through simulation analysis. Then, the foundation structure 2 is constructed at the construction position, and the circular track 3 is arranged on the foundation structure 2. The curvature of the circular track 3 is the same as that of the circular structure. Then, a circular secondary truss 112 is spliced on both sides of the rear end of the circular main truss 111 along the radial direction to form the initial truss assembly 12. The arc length of the circular secondary truss 112 is equal to half of the arc length of the circular main truss 111. It can be seen from this that there are no components on both sides of the front end of the circular main truss 111, and the circular main truss 111 can act as a steel guide beam. Two jacking and moving components 4 are respectively arranged at the head and tail ends of the circular main truss 111. Then, the hoisting equipment 200 is controlled to hoist the initial truss assembly 12 and place it on the hoisting station of the circular track 3, so that the jacking and moving components 4 are in sliding fit with the circular track 3, and the jacking and moving components 4 can move along the circular track 3. Then, a temporary limiting member 5 is arranged on the circular track 3 to brake the jacking and moving components 4 at the head and tail ends of the circular main truss 111, so that they drive the initial truss assembly 12 to move along the circular track 3 until the jacking and moving component 4 at the front end of the initial truss assembly 12 abuts against the temporary limiting member 5, stop jacking, and disassemble the temporary limiting member 5. Repeat the above operations until the initial truss assembly 12 leaves the hoisting station, so that the hoisting station is vacated. Thus, the construction process of the initial truss assembly 12 is completed.

[0098] After the construction of the initial truss assembly 12 is completed, the annular main truss 111 and the annular secondary truss 112 are spliced again to form the truss unit 11. The jacking and moving assemblies 4 are arranged at both the head and the tail ends of the truss unit 11, and the truss unit 11 is hoisted to the hoisting station. Then, the front end of the truss unit 11 is fixedly connected to the rear end of the initial truss assembly 12. Referring to the construction steps of the temporary limit member 5 in the construction process of the initial truss assembly 12, all the jacking and moving assemblies 4 are braked to drive the initial truss assembly 12 and the truss unit 11 to move along the annular track 3, and the hoisting station is made vacant again to facilitate the splicing of other truss units 11. The above operations are repeated, and adjacent two truss units 11 are fixedly connected until the last truss unit 11 is hoisted to the hoisting station and any adjacent two truss units 11 are fixedly connected. Then, the remaining two annular secondary trusses 112 are spliced at the front end of the annular main truss 111 of the initial truss assembly 12 to form the truss unit 11, and the front end of the truss unit 11 is fixedly connected to the rear end of the last truss unit 11, so as to form the circular steel structure 1. Then, the circular steel structure 1 is jacked up by the jacking mechanism. At this time, the jacking and moving assemblies 4 will be separated from the annular track 3, and the jacking and moving assemblies 4, the annular track 3 and the foundation structure 2 are disassembled, and the permanent support structure is constructed at the position to be constructed. The jacking mechanism is controlled to drive the circular steel structure 1 to move downwards so that it falls onto the permanent support structure, and finally the circular steel structure 1 is fixedly connected to the permanent support structure.

[0099] By using finite element software to establish a construction model and performing simulation analysis on the construction model, the preset jacking distance of the truss unit 11 can be determined in advance. When the position of the truss unit 11 needs to be adjusted, the jacking and moving assembly 4 can be controlled to jack and drive the truss unit 11 to move the preset jacking distance, and the jacking and moving are repeated multiple times until the truss unit 11 moves to the preset position. By setting the preset jacking distance, it can be ensured that the truss unit 11 can move stably along the annular track 3, avoiding the jacking and moving assembly 4 detaching from the annular track 3 due to too long a moving distance, and the maximum single moving distance of the truss unit 11 can be ensured, improving the work efficiency.

[0100] When constructing the circular steel structure 1 in a large-span interval, multiple truss units 11 are spliced in segments and the integral jacking method is used for jacking construction. When splicing the first truss unit 11, only two circular secondary trusses 112 are spliced at the rear end of the circular main truss 111, that is, there are no components on both sides of the front end of the circular main truss 111. Thus, it can be seen that the circular main truss 111 can be used as a steel guide beam structure. When moving the truss unit 11 by the jacking method, it can guide the truss unit 11 to move along the circular track 3. Therefore, there is no need to set up a steel guide beam structure at the front end of the truss unit 11 again, which can reduce the construction and demolition processes of the steel guide beam structure, thereby shortening the construction period, improving work efficiency, reducing the workload of the staff, and reducing the waste of construction materials and construction costs.

[0101] Exemplarily, the hoisting device 200 includes a crane.

[0102] Optionally, as Figure 2 and Figure 3 shown, the foundation structure 2 includes a first circular foundation beam 21, a second circular foundation beam 22, a plurality of first embedded parts 23 and a plurality of second embedded parts 24. The inner diameter of the first circular foundation beam 21 is greater than the inner diameter of the second circular foundation beam 22, and the first circular foundation beam 21 surrounds the outside of the second circular foundation beam 22. The plurality of first embedded parts 23 are radially arranged on both sides of the first circular foundation beam 21 and are spaced along the circumferential direction of the first circular foundation beam 21. The plurality of second embedded parts 24 are radially arranged on both sides of the second circular foundation beam 22 and are spaced along the circumferential direction of the second circular foundation beam 22.

[0103] Step S2 specifically includes the following steps:

[0104] S211. Embed a plurality of first embedded parts 23 along the preset construction positions of the first circular foundation beam 21 and embed a plurality of second embedded parts 24 along the preset construction positions of the second circular foundation beam 22;

[0105] S212. Pour the roof floor slab 100 and construct the first circular foundation beam 21 and the second circular foundation beam 22 on the roof floor slab 100;

[0106] S213. Fix and connect the first embedded parts 23 and the first circular foundation beam 21, and the second embedded parts 24 and the second circular foundation beam 22;

[0107] S214. Lay a circular track 3 on both the first circular foundation beam 21 and the second circular foundation beam 22.

[0108] By fixedly connecting the first embedded part 23 and the first annular foundation beam 21, and the second embedded part 24 and the second annular foundation beam 22, the connection strength between the roof floor slab 100 and the first annular foundation beam 21 and the second annular foundation beam 22 can be improved, which is beneficial to enhancing the overall stability of the foundation structure 2.

[0109] It should be noted that the spacing distances between the first embedded part 23 and the second embedded part 24 are determined according to factors such as the geological conditions of the construction location of the circular steel structure 1, the span at the construction location, and the specific conditions of the construction site. In this embodiment, the spacing distances between the first embedded part 23 and the second embedded part 24 are both set to 0.5 m.

[0110] Optionally, as Figure 2 and Figure 3 shown, the foundation structure 2 further includes a plurality of connecting cross beams 25. One end of the connecting cross beam 25 is connected to the first annular foundation beam 21, and the other end is connected to the second annular foundation beam 22. The plurality of connecting cross beams 25 are arranged at intervals along the circumferential direction of the annular foundation beam, and each connecting cross beam 25 extends radially along the first annular foundation beam 21. By providing the connecting cross beams 25 between the first annular foundation beam 21 and the second annular foundation beam 22, the connection strength between the first annular foundation beam 21 and the second annular foundation beam 22 can be significantly enhanced, thereby improving the overall stiffness of the entire foundation structure 2, enabling the foundation structure 2 to effectively resist external loads and deformations, and further being beneficial to improving the stability of the annular track 3, ensuring that the jacking and moving assembly 4 drives the truss unit 11 to stably jack and move along the annular track 3, and preventing the truss unit 11 from tilting and shifting.

[0111] In this embodiment, the interval between any two adjacent connecting cross beams 25 is 5 m. In other embodiments, the interval between two adjacent connecting cross beams 25 can also be set to other distances according to actual needs, which is not limited here.

[0112] Optionally, as Figure 2 、 Figure 3 and Figure 5As shown in the figure, the pushing and moving assembly 4 includes a mounting base 41, a first slider 42, a telescopic driving member 43, and a second slider 44. The truss unit 11 is disposed at the upper end of the mounting base 41, and the first slider 42 is disposed at the lower end of the mounting base 41. One end of the telescopic driving member 43 is rotatably connected to the mounting base 41, and the other end is rotatably connected to the second slider 44. By the telescopic movement of the telescopic driving member 43, the first slider 42 and the second slider 44 can be driven to move along the annular track 3, so as to adjust the distance between the first slider 42 and the second slider 44. The annular track 3 is provided with a sliding groove 31, and the sliding groove 31 extends along the circumferential direction of the annular track 3. The first slider 42 and the second slider 44 are both slidably clamped in the sliding groove 31. A limiting clamping rod 45 is disposed at one end of the second slider 44 away from the telescopic driving member 43, and a plurality of clamping grooves are circumferentially spaced on the annular track 3. The inner wall of the clamping groove is provided with a guiding inclined surface 32, and the guiding inclined surface 32 gradually extends upward along the direction from the second slider 44 to the first slider 42. The limiting clamping rod 45 has a first state of being clamped in the clamping groove and a second state of moving along the guiding inclined surface 32 and away from the clamping groove.

[0113] In the initial state, the limiting clamping rod 45 is clamped in the clamping groove, that is, the limiting clamping rod 45 is in the first state. When it is necessary to move the truss unit 11 away from the hoisting station, first, a temporary limiting member 5 is arranged above the moving direction of the truss unit 11, and the distance between the temporary limiting member 5 and the front end of the truss unit 11 is a preset pushing distance. Then, the limiting clamping rods 45 of the pushing and moving assemblies 4 at both the head and the tail ends of the truss unit 11 maintain the first state, and the telescopic driving member 43 is controlled to extend. The telescopic driving member 43 will push the second slider 44 along its extending direction. Since the limiting clamping rod 45 at one end of the second slider 44 away from the telescopic driving member 43 is clamped in the clamping groove, the groove wall of the clamping groove will be tightly abutted against the limiting clamping rod 45, so that the second slider 44 remains stationary, and the first slider 42 will move in the direction away from the second slider 44 until it abuts against the temporary limiting member 5. After that, the first slider 42 will be limited. The telescopic driving member 43 is controlled to contract. At this time, under the action of the temporary limiting member 5, the first slider 42 will remain stationary, and the telescopic driving member 43 will drive the second slider 44 to move in the direction close to the first slider 42, so that the second slider 44 drives the limiting clamping rod to move along the guiding inclined surface 32, making the limiting clamping rod 45 away from the clamping groove. At this time, the limiting clamping rod 45 is in the second state until the limiting clamping rod 45 of the second slider 44 is clamped in another clamping groove again, thereby enabling the truss unit 11 to complete a movement of the preset pushing distance. Repeat the above operations until the truss unit 11 moves away from the hoisting station.

[0114] It should be noted that during the movement of the first slider 42 and the second slider 44, the first slider 42 and the second slider 44 are always located in the sliding groove 31 and slide along the sliding groove 31.

[0115] Exemplarily, the telescopic drive mechanism includes a telescopic air cylinder or a telescopic electric cylinder, etc.

[0116] Optionally, as Figure 2 , Figure 5 and Figure 6 shown, a plurality of limiting and centering components 6 are arranged in the sliding groove 31 of the annular track 3, and the plurality of limiting and centering components 6 are arranged at intervals along the extending direction of the sliding groove 31. The limiting and centering component 6 includes two guiding wedges 61 that are symmetrically arranged with respect to the center axis of the sliding groove 31 and are spaced apart. The two guiding wedges 61 enclose a limiting chamber 62, and the limiting chamber 62 communicates with the inner cavity of the sliding groove 31. Each guiding wedge 61 is provided with a guiding inclined surface 63, and the guiding inclined surface 63 gradually inclines from the inner wall of the sliding groove 31 to the center axis of the sliding groove 31, and is used to guide the first slider 42 or the second slider 44 into the limiting chamber 62.

[0117] During the process that the first slider 42 or the second slider 44 of the pushing and moving assembly 4 moves along the sliding groove 31 of the annular track 3, whenever the first slider 42 or the second slider 44 moves to contact with the two guiding wedges 61, the first slider 42 or the second slider 44 will move along the guiding inclined surface 63 of any one of the two guiding wedges 61, so that the guiding inclined surface 63 guides the first slider 42 or the second slider 44 into the limiting chamber 62. It is known that the two guiding wedges 61 are symmetrically arranged with respect to the center axis of the sliding groove 31 and are spaced apart, so the limiting chamber 62 is centered relative to the sliding groove 31, so that the first slider 42 or the second slider 44 is centered relative to the annular track 3, ensuring that the pushing and moving assembly 4 always moves along the preset direction, and the truss unit 11 can be prevented from deviating and shifting during the pushing process, and the moving direction of the pushing and moving assembly 4 can be corrected during the continuous pushing and moving process, without stopping the construction for adjustment, which is beneficial to improving the work efficiency.

[0118] Optionally, as Figure 2 and Figure 3 shown, the truss unit 11 further includes a plurality of first temporary support structures 113. The plurality of first temporary support structures 113 are arranged at intervals along the extending direction of the annular main truss 111, and the lower ends of each first temporary support structure 113 are arranged on the first annular foundation beam 21 and the second annular foundation beam 22.

[0119] Step S3 specifically includes the following steps:

[0120] S311. Splice an annular secondary truss 112 on both sides along the radial direction at the rear end of the annular main truss 111 to form an initial truss assembly 12, and arrange a plurality of first temporary support structures 113 below the annular main truss 111;

[0121] S312. Determine whether the initial truss assembly 12 and the first temporary support structure 113 are qualified in flaw detection. If not, execute S313; if so, execute S314;

[0122] S313. Perform repair treatment on the initial truss assembly 12 and the first temporary support structure 113, and then return to execute S312;

[0123] S314. Set the first temporary support structures 113 at both ends of the annular main truss 111 on the installation base 41 of the jacking and moving assembly 4;

[0124] S315. Arrange a plurality of limiting components 7 outside the annular track 3. Two limiting components 7 are correspondingly arranged for each first temporary support structure 113. The two limiting components 7 are respectively arranged on both sides of the first temporary support structure 113. The two limiting components 7 are fixedly connected to the first temporary support structure 113, and one of the two limiting components 7 is in sliding fit with the first annular foundation beam 21, and the other is in sliding fit with the first annular foundation beam 21 or the second annular foundation beam 22.

[0125] By arranging the first temporary support structure 113, the initial truss assembly 12 can be supported, thereby raising the vertical height of the initial truss assembly 12, facilitating the subsequent construction process of jacking and moving, and providing connection nodes with the jacking and moving assembly 4. In addition, after connecting the first temporary support structure 113 and the initial truss assembly 12, flaw detection is carried out on both of them, which can accurately identify the defects in the structure and take corresponding repair measures in time, thereby ensuring the safety of the building.

[0126] In this embodiment, as Figures 2 to 4 shown, the limiting component 7 includes a connecting frame 71, a first connecting frame 72, a second connecting frame 73, a connecting screw 74, a fastening nut 75, a translation slider 76 and a limiting frame 77. One end of the connecting frame 71 is connected to the first temporary support structure 113, and the other end is connected to the first connecting frame 72. The second connecting frame 73 is provided with a connecting screw 74. The second connecting frame 73 is sleeved in the first connecting frame 72, and the connecting screw 74 passes through the first connecting frame 72 and is threadedly connected to the fastening nut 75. The translation slider 76 is nested in the second connecting frame 73. The limiting frame 77 is connected to the end of the second connecting frame 73 by bolts, thereby limiting the translation slider 76 to prevent it from disengaging from the second connecting frame 73. The translation slider 76 can be in sliding contact with the side wall of the first annular foundation beam 21 or the side wall of the second annular foundation beam 22.

[0127] Step S5 specifically includes the following steps:

[0128] S511. Preset the pre-stop position of the initial truss assembly 12, set the limit centering assembly 6 at the pre-stop position, and set a temporary limit member 5 on the annular track 3. The temporary limit member 5 is spaced from the front end of the initial truss assembly 12 by a preset pushing distance.

[0129] S512. Set a second temporary support structure 8 on the initial truss assembly 12. The second temporary support structure 8 includes a support frame body 81 and a connecting member. The support frame body 81 is arranged on the annular main truss 111 and extends vertically. One end of the connecting member is connected to the support frame body 81, and the other end is connected to the front end of the annular main truss 111 for lifting the annular main truss 111 upward.

[0130] S513. Brake the pushing and moving assembly 4 to drive the initial truss assembly 12 to move along the annular track 3 until the pushing and moving assembly 4 at the front end of the initial truss assembly 12 abuts against the temporary limit member 5, so that the temporary limit member 5 limits the pushing and moving assembly 4 along the extending direction of the pushing and moving assembly 4.

[0131] S514. Remove the temporary limit member 5.

[0132] When the position of the initial truss assembly 12 needs to be adjusted, first, the limit centering assembly 6 needs to be set at the pre-stop position (i.e., the position when the initial truss assembly 12 leaves the hoisting station), so as to ensure that when the initial truss assembly 12 stops moving, the first slider 42 and the second slider 44 of the pushing and moving assembly 4 of the initial truss assembly 12 are centered relative to the annular track 3, and ensure that the pushing and moving assembly 4 always moves along the preset direction, which can avoid the deviation of the truss unit 11. By setting the second temporary support structure 8, the front end of the annular main truss 111 of the initial truss assembly 12 can be lifted, so that the annular main truss 111 maintains a slightly lifted posture, which can increase the longitudinal stability of the annular main truss 111, thereby reducing the risk of overturning and ensuring construction safety. In addition, during the pushing and moving process, the annular main truss 111 may generate a large cantilever negative moment. By lifting the annular main truss 111 upward, this negative moment can be partially offset, thereby reducing the structural stress, improving the structural performance, and enhancing the structural stability.

[0133] Exemplarily, the support frame body 81 includes a portal frame, and the connecting member includes a steel wire rope.

[0134] Optionally, step S15 specifically includes the following steps:

[0135] S151. Control the pushing and moving assembly 4 to drive the circular steel structure 1 to move along the annular track 3 so that the circular steel structure 1 is located at the preset position.

[0136] S152. Control the jacking mechanism to jack up the circular steel structure 1 vertically, and disassemble the jacking and moving assembly 4, the circular track 3, the foundation structure 2, the first temporary support structure 113 and the second temporary support structure 8.

[0137] After the circular steel structure 1 is spliced, by controlling the jacking and moving assembly 4 to drive the entire circular steel structure 1 to move, it can be positioned at the preset position to ensure the accuracy of the construction.

[0138] Optionally, step S16 specifically includes the following steps:

[0139] S161. Construct the permanent support structure at the construction position to be constructed, and control the jacking mechanism to drive the circular steel structure 1 to move vertically so that the circular steel structure 1 is located on the permanent support structure;

[0140] S162. Fix and connect the circular steel structure 1 and the permanent support structure;

[0141] S163. Determine whether the circular steel structure 1 and the permanent support structure are qualified in flaw detection. If not, execute S164; if so, execute S165;

[0142] S164. Repair the circular steel structure 1 and the permanent support structure, and then return to execute S163;

[0143] S165. End the construction.

[0144] Exemplarily, the jacking mechanism includes a hydraulic jack.

[0145] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A construction method for a circular ring-shaped steel structure, the circular ring-shaped steel structure (1) comprising a plurality of truss units (11), the plurality of truss units (11) being sequentially spliced ​​end to end to enclose and form the circular ring-shaped steel structure (1), the truss unit (11) comprising a circular main truss (111) and four circular secondary trusses (112), the four circular secondary trusses (112) being radially arranged on both sides of the circular main truss (111), characterized in that: The construction method of the annular steel structure (1) comprises the following steps: S1. Using finite element software to establish a construction model of a finite element circular ring steel structure (1), and performing a construction simulation analysis on the construction model of the finite element circular ring steel structure (1) to determine a preset jacking distance of the truss unit (11); S2, constructing a foundation structure (2) at the location to be constructed, and laying a circular track (3) on the foundation structure (2); S3, splicing one of the annular secondary trusses (112) on both sides of the rear end of the annular main truss (111) in the radial direction to form an initial truss assembly (12), and arranging two pushing moving assemblies (4) at the head and tail ends of the annular main truss (111) of the initial truss assembly (12), respectively, the arc length of the annular secondary truss (112) being equal to half the arc length of the annular main truss (111); S4, controlling the hoisting equipment (200) to hoist the initial truss assembly (12) to the hoisting station of the annular track (3), so that the pushing and moving assembly (4) can slide and cooperate with the annular track (3), and the pushing and moving assembly (4) can move along the annular track (3); S5, a temporary limiting member (5) is arranged on the annular track (3), the temporary limiting member (5) is spaced from the front end of the initial truss assembly (12) by the preset pushing distance, the pushing moving assembly (4) is braked so that it drives the initial truss assembly (12) to move along the annular track (3) until the pushing moving assembly (4) at the front end of the initial truss assembly (12) abuts against the temporary limiting member (5), so that the temporary limiting member (5) limits the pushing moving assembly (4) along the extension direction of the pushing moving assembly (4), and the temporary limiting member (5) is removed; S6, repeating step S5 until the initial truss assembly (12) leaves the hoisting station; S7, splicing the four annular secondary trusses (112) onto the annular main truss (111) to form the truss unit (11), respectively arranging two of the pushing moving assemblies (4) at the head and tail ends of the annular main truss (111) of the truss unit (11), and controlling the hoisting equipment (200) to hoist the truss unit (11) to the hoisting station of the annular track (3), so that the pushing moving assembly (4) and the annular track (3) can be slidably matched; S8, fixedly connecting the front end of the truss unit (11) to the rear end of the initial truss assembly (12); S9, the temporary limiting member (5) is arranged on the annular track (3), the temporary limiting member (5) is spaced from the front end of the initial truss assembly (12) by the preset pushing distance, the pushing moving assembly (4) of the truss unit (11) and the pushing moving assembly (4) of the initial truss assembly (12) are braked, so that the pushing moving assembly (4) of the truss unit (11) and the initial truss assembly (12) are driven along the annular track (3), until the pushing moving assembly (4) at the front end of the initial truss assembly (12) abuts against the temporary limiting member (5), so that the temporary limiting member (5) limits the pushing moving assembly (4) along the extension direction of the pushing moving assembly (4), and the temporary limiting member (5) is removed; S10, repeating step S9 until the truss unit (11) on the hoisting station leaves the hoisting station; S11, repeating step S7, and fixing and connecting two adjacent truss units (11); S12, repeat step S9 and step S10; S13, repeating steps S11 and S12 until the last truss unit (11) is hoisted to the hoisting station, and any two adjacent truss units (11) are fixedly connected; S14, splicing one of the annular secondary trusses (112) on both sides of the front end of the annular main truss (111) of the initial truss assembly (12) in the radial direction to form the truss unit (11), and fixing the front end of the truss unit (11) to the rear end of the last truss unit (11) to form the circular steel structure (1); S15, controlling the lifting mechanism to lift the annular steel structure (1) vertically, and disassembling the pushing moving assembly (4), the annular track (3) and the base structure (2); S16. Construct a permanent support structure at the location to be constructed, control the lifting mechanism to drive the annular steel structure (1) to move vertically, so that the annular steel structure (1) falls onto the permanent support structure, and fix the annular steel structure (1) and the permanent support structure to be connected.

2. The construction method of the circular steel structure according to claim 1, characterized in that: The foundation structure (2) comprises a first annular foundation beam (21), a second annular foundation beam (22), a plurality of first embedded parts (23) and a plurality of second embedded parts (24); the inner diameter of the first annular foundation beam (21) is greater than the inner diameter of the second annular foundation beam (22); the first annular foundation beam (21) is arranged outside the second annular foundation beam (22); the plurality of first embedded parts (23) are radially arranged on both sides of the first annular foundation beam (21) and are arranged at intervals along the circumference of the first annular foundation beam (21); the plurality of second embedded parts (24) are radially arranged on both sides of the second annular foundation beam (22) and are arranged at intervals along the circumference of the second annular foundation beam (22); the step S2 specifically comprises the following steps: S211, pre-embedding a plurality of the first embedded parts (23) along a preset construction position of the first annular foundation beam (21), and pre-embedding a plurality of the second embedded parts (24) along a preset construction position of the second annular foundation beam (22); S212, pouring a roof slab (100), and constructing the first annular foundation beam (21) and the second annular foundation beam (22) on the roof slab (100); S213, fixedly connecting the first embedded part (23) and the first annular foundation beam (21), and the second embedded part (24) and the second annular foundation beam (22); S214. Arrange one of the annular tracks (3) on each of the first annular foundation beam (21) and the second annular foundation beam (22).

3. The construction method of the circular steel structure according to claim 2, characterized in that: The foundation structure (2) further comprises a plurality of connecting cross beams (25), one end of each connecting cross beam (25) being connected to the first annular foundation beam (21), and the other end of each connecting cross beam (25) being connected to the second annular foundation beam (22), the plurality of connecting cross beams (25) being arranged at intervals along the circumference of the annular foundation beam, and each connecting cross beam (25) extending in the radial direction of the first annular foundation beam (21).

4. The construction method of the circular steel structure according to claim 2, characterized in that: The pushing and moving assembly (4) comprises a mounting base (41), a first slider (42), a telescopic driving member (43) and a second slider (44); the truss unit (11) is arranged at the upper end of the mounting base (41); the first slider (42) is arranged at the lower end of the mounting base (41); one end of the telescopic driving member (43) is rotatably connected to the mounting base (41); and the other end is rotatably connected to the second slider (44) to adjust the distance between the first slider (42) and the second slider (44); the annular track (3) is provided with a sliding groove (31); the sliding groove (31) extends along the circumference of the annular track (3); the first slider (42) and the second slider (44) can both be slidably clamped in the sliding groove (31); A limiting clamping rod (45) is provided at one end of the second sliding block (44) facing away from the telescopic driving member (43); a plurality of clamping grooves are circumferentially arranged at intervals on the annular track (3); a guiding inclined surface (32) is provided on the inner wall of the clamping groove; the guiding inclined surface (32) gradually extends upward in a direction from the second sliding block (44) to the first sliding block (42); the limiting clamping rod (45) has a first state of being clamped in the clamping groove and a second state of moving along the guiding inclined surface (32) and away from the clamping groove.

5. The construction method of the circular ring steel structure according to claim 4, characterized in that: A plurality of limit centering components (6) are arranged in the sliding groove (31) of the annular track (3). The plurality of limit centering components (6) are arranged at intervals along the extension direction of the sliding groove (31). The limit centering components (6) include two guide wedges (61) symmetrically arranged with respect to the central axis of the sliding groove (31) and arranged at intervals. The two guide wedges (61) surround a limit chamber (62). The limit chamber (62) is communicated with the inner cavity of the sliding groove (31). Each guide wedge (61) is provided with a guide slope (63). The guide slope (63) is gradually inclined along the inner wall of the sliding groove (31) to the central axis of the sliding groove (31) and is used to guide the first slider (42) or the second slider (44) to enter the limit chamber (62).

6. The construction method of the circular steel structure according to claim 5, characterized in that: The truss unit (11) further comprises a plurality of first temporary support structures (113), wherein the plurality of first temporary support structures (113) are arranged at intervals along the extension direction of the annular main truss (111), and the lower end of each of the first temporary support structures (113) is arranged on the first annular foundation beam (21) and the second annular foundation beam (22), and the step S3 specifically comprises the following steps: S311, splicing one of the annular secondary trusses (112) on both sides of the rear end of the annular main truss (111) in the radial direction to form an initial truss assembly (12), and arranging a plurality of the first temporary support structures (113) below the annular main truss (111); S312, judging whether the initial truss assembly (12) and the first temporary support structure (113) are qualified by flaw detection, if not, executing S313, if yes, executing S314; S313, repairing the initial truss assembly (12) and the first temporary support structure (113), and then returning to S312; S314, arranging the first temporary support structures (113) at the front and rear ends of the annular main truss (111) on the mounting base (41) of the pushing moving assembly (4); S315. A plurality of limit assemblies (7) are arranged on the outer side of the annular track (3), and two limit assemblies (7) are arranged corresponding to each of the first temporary support structures (113). The two limit assemblies (7) are arranged on both sides of the first temporary support structure (113), and the two limit assemblies (7) are fixedly connected to the first temporary support structure (113), and one of the two limit assemblies (7) is slidably matched with the first annular foundation beam (21), and the other is slidably matched with the first annular foundation beam (21) or the second annular foundation beam (22).

7. The construction method of the circular steel structure according to claim 6, characterized in that: The step S5 specifically comprises the following steps: S511, presetting a pre-stop position of the initial truss assembly (12), arranging the limit centering assembly (6) at the pre-stop position, and arranging a temporary limit member (5) on the annular track (3), wherein the temporary limit member (5) is spaced from the front end of the initial truss assembly (12) by the preset jacking distance; S512, arranging a second temporary support structure (8) on the initial truss assembly (12), wherein the second temporary support structure (8) comprises a support frame body (81) and a connecting piece, wherein the support frame body (81) is arranged on the annular main truss (111) and extends vertically, wherein one end of the connecting piece is connected to the support frame body (81), and the other end is connected to the front end of the annular main truss (111), and is used to pull the annular main truss (111) upwards; S513, braking the pushing movable assembly (4) so ​​as to drive the initial truss assembly (12) to move along the annular track (3) until the pushing movable assembly (4) at the front end of the initial truss assembly (12) abuts against the temporary limiting member (5), so that the temporary limiting member (5) limits the pushing movable assembly (4) along the extension direction of the pushing movable assembly (4); S514, disassembling the temporary limiting member (5).

8. The construction method of the circular steel structure according to claim 7, characterized in that: The step S15 specifically includes the following steps: S151, controlling the pushing moving assembly (4) to drive the annular steel structure (1) to move along the annular track (3), so that the annular steel structure (1) is located at a preset position; S152, control the lifting mechanism to lift the circular ring-shaped steel structure (1) vertically, and dismantle the pushing moving assembly (4), the annular track (3), the base structure (2), the first temporary supporting structure (113) and the second temporary supporting structure (8).

9. The construction method of the circular steel structure according to any one of claims 1 to 8, characterized in that: The step S16 specifically includes the following steps: S161, constructing a permanent support structure at the location to be constructed, controlling the lifting mechanism to drive the annular steel structure (1) to move vertically, so that the annular steel structure (1) is located on the permanent support structure; S162, fixedly connecting the annular steel structure (1) and the permanent support structure; S163, judging whether the circular steel structure (1) and the permanent support structure are qualified by flaw detection, if not, executing S164, if yes, executing S165; S164, repairing the annular steel structure (1) and the permanent support structure, and then returning to S163; S165, end construction.

10. The construction method of the circular steel structure according to any one of claims 1 to 8, characterized in that: The lifting mechanism comprises a hydraulic jack.

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