Assembled steel structure and construction method

Abstract

The application relates to the technical field of steel structures, in particular to a spliced steel structure and a construction method. The spliced steel structure comprises at least two truss blocks, the truss block comprises at least one cross steel frame, and the spliced steel structure further comprises: a bracing device, two adjacent truss blocks are braced by two groups of bracing devices, the bracing device comprises a turning bracing rod and a locking bracing rod, the turning bracing rod and the locking bracing rod rotate in the same plane and intersect with the plane where the cross steel frame is located; a locking device is used for locking and fixing the locking bracing rods of the two groups of bracing devices; and when the two truss blocks are spliced along the extension direction thereof, the locking bracing rods of the two groups of bracing devices are arranged in parallel and close to each other. According to the application, after the welding positions of two adjacent truss blocks are aligned, the two adjacent truss blocks are braced by the two groups of bracing devices, so that the splicing positions of the two adjacent truss blocks are kept, and the accuracy of the splicing positions is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel structure, and particularly relates to a spliced steel structure and a construction method. BACKGROUND

[0002] Steel structure is a structure composed of steel materials, and is one of main building structure types. The steel structure is mainly composed of steel beams, steel columns, steel trusses and the like, and the aforementioned components are mainly made of section steel, steel pipes and steel plates. Welding, riveting, bolt connection and the like are usually used as connecting modes between components or parts. The steel structure is widely applied in the fields of workshops, stadiums, bridges and the like due to its advantages of lighter weight, strong bearing capacity and short construction period.

[0003] According to the design needs of special-shaped buildings such as stadiums, the trusses of the steel structure are usually in a structure similar to a ring or a frame, and the trusses cannot be assembled on the ground and then hoisted to the top of the reinforced concrete building as a whole. The usually adopted construction mode is to divide the trusses into segments; specifically, the truss is divided into a plurality of blocks, the blocks are assembled on the ground, and then the blocks of the truss are hoisted by hoisting equipment, and temporary supports are arranged on the ground to adjust the positions of the blocks by a jack or the like to align the adjacent blocks, and then the adjacent blocks are welded and fixed to form a whole structure. After the blocks of the adjacent two trusses are aligned by the jack, the blocks are usually fixed or connected by arranging rigid stays between the blocks and the reinforced concrete building or flexibly pulling the adjacent two blocks, so as to facilitate the welding construction.

[0004] However, the arrangement of the rigid stays between the blocks and the reinforced concrete building needs cast-in-situ construction of the reinforced concrete building to fix the stay device 200 on the reinforced concrete building, which increases the construction difficulty, and the cast-in-situ concrete also needs to be solidified, which prolongs the construction period. When the flexibly pulling is performed between the adjacent two blocks, the steel cable and the like used for the flexibly pulling usually needs to be wound on the blocks, and at this time, the steel cable may slide, so it is difficult to guarantee the effect of the pulling between the two blocks, and the pulling is prone to failure. SUMMARY

[0005] In order to solve the problem that the pulling of the blocks is difficult or poor in effect in the segmented construction of the truss of the steel structure in the prior art, the present application provides a spliced steel structure and a construction method.

[0006] In a first aspect, the present application provides a spliced steel structure, which comprises at least two truss blocks, the two truss blocks are spliced along the extension direction thereof, the truss block comprises at least one cross steel frame, the cross steel frame is arranged in a plane, and the spliced steel structure further comprises:

[0007] The bracing device is used for bracing two adjacent truss blocks, and comprises a bracing base plate, a first swing base, a turning bracing rod, a second swing base and a locking bracing rod. The bracing base plate is connected with the cross steel frame. The first swing base is arranged on the bracing base plate. One end of the turning bracing rod is rotationally connected with the first swing base. The second swing base is arranged on the other end of the turning bracing rod. One end of the locking bracing rod is rotationally connected with the second swing base. The turning bracing rod and the locking bracing rod rotate in the same plane and intersect with the plane of the cross steel frame.

[0008] The locking device is used for locking and fixing the locking bracing rods of the two groups of bracing devices.

[0009] When the two truss blocks are spliced along the extending direction thereof, the locking bracing rods of the two groups of bracing devices are arranged in parallel and close to each other.

[0010] Optionally, the truss block further comprises a fixing base plate arranged on the cross steel frame and arranged on the two sides of the cross steel frame respectively with the bracing base plates. The bracing base plate and the fixing base plate are detachably connected.

[0011] Optionally, when the assembled steel structure comprises at least three truss blocks, the cross steel frame of the truss block located at the middle position is provided with one group of bracing devices on the two sides thereof respectively. The bracing base plates of one group of bracing devices constitute the fixing base plates of the other group of bracing devices.

[0012] Optionally, the locking device comprises two locking units arranged in opposition and detachably connected. The two locking units are provided with clamping grooves on the sides close to each other. The clamping grooves correspond to the locking bracing rods one by one. The locking bracing rods are arranged in the two opposed clamping grooves.

[0013] Optionally, the locking device is provided with at least two locking devices close to the ends of the locking bracing rods. The locking devices close to the ends of the locking bracing rods are arranged in intervals with the ends of the locking bracing rods.

[0014] Optionally, the radii of the two opposed clamping grooves close to the ends of the locking bracing rods are smaller than the radii of the other two opposed clamping grooves. The two clamping grooves with smaller radii are used for extruding the ends of the locking bracing rods close to the locking devices, so that the ends of the locking bracing rods form necked sections.

[0015] Optionally, the length of the locking tension rod is greater than the length of the steering tension rod.

[0016] Optionally, the first swing base comprises a first fixed plate and a first rotating seat, the first fixed plate is arranged on the tension base plate, the first rotating seat is arranged on the side of the first fixed plate away from the tension base plate, the first rotating plate is arranged on one end of the steering tension rod close to the first swing base, the first rotating plate extends into the first rotating seat, and the first rotating plate is rotationally connected through a group of bolt connecting pieces.

[0017] The second swing base comprises a second fixed plate and a second rotating seat, the second fixed plate is arranged on one end of the steering tension rod away from the first swing base, the second rotating seat is arranged on the second fixed plate, the second rotating plate is arranged on one end of the locking tension rod close to the second swing base, the second rotating plate extends into the second rotating seat, and the second rotating plate is rotationally connected through a group of the bolt connecting pieces.

[0018] Optionally, the truss block further comprises a top chord and a bottom chord, the top chord and the bottom chord are arranged in two horizontal planes at different heights respectively, and two top chords and two bottom chords are arranged at intervals, and the cross steel frame is arranged in a vertical plane and connected with the two top chords and the two bottom chords.

[0019] In a second aspect, the application provides a construction method of any one of the assembled steel structures provided by the application, the construction method comprises:

[0020] Welding and fixing steel pipes on the ground into truss blocks, and arranging tension devices on the cross steel frames of the truss blocks by using steel pipes, steel plates and steel blocks;

[0021] Hoisting the truss blocks by hoisting equipment, and arranging temporary supports on the ground to facilitate the adjustment of the assembly of the truss blocks;

[0022] Adjusting the positions of the truss blocks on the temporary supports by jacks to align the welding positions of two adjacent truss blocks;

[0023] Locking and fixing the locking tension rods of two tension devices by locking devices;

[0024] Welding the welding positions of two adjacent truss blocks.

[0025] The application sets the bracing device on the cross steel frame of the truss sub-block, and avoids the steel pipe structure of the turning bracing rod and the locking bracing rod by the first swing base and the second swing base, so that the locking bracing rods of the two groups of bracing devices are close to each other and keep parallel, and the two locking bracing rods are locked and fixed by the locking device, so that the adjacent two truss sub-blocks can be braced by the two groups of bracing devices after the welding positions of the adjacent two truss sub-blocks are aligned, so as to keep the splicing position of the adjacent two truss sub-blocks, and then the accuracy of the splicing position is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the structural schematic diagram of the spliced steel structure provided by the embodiment one of the application.

[0027] Figure 2 is the schematic diagram of the bracing base plate and the fixed base plate of the spliced steel structure provided by the embodiment one of the application, which are arranged on the two sides of the cross steel frame.

[0028] Figure 3 is the schematic diagram of the spliced steel structure provided by the embodiment one of the application, when the locking device locks and fixes the two groups of bracing devices.

[0029] Figure 4 is the schematic diagram of the spliced steel structure provided by the embodiment one of the application, when more than two groups of bracing devices are continuously connected.

[0030] The reference signs are explained as follows: 100, truss sub-block; 110, cross steel frame; 120, fixed base plate; 130, top chord; 140, bottom chord; 200, bracing device; 210, bracing base plate; 220, first swing base; 221, first fixed plate; 222, first rotating seat; 230, turning bracing rod; 231, first rotating plate; 240, second swing base; 241, second fixed plate; 242, second rotating seat; 250, locking bracing rod; 251, second rotating plate; 300, locking device; 310, locking unit; 311, clamping groove. DETAILED DESCRIPTION

[0031] The application is further described below in combination with the accompanying Figures 1-4 The application is further described below in combination with the accompanying EMBODIMENT

[0032] The embodiment one of the application provides a spliced steel structure, which comprises at least two truss sub-blocks 100, the two truss sub-blocks 100 are spliced along the extension direction thereof, the truss sub-block 100 comprises at least one cross steel frame 110, the cross steel frame 110 is arranged in a plane, and the spliced steel structure further comprises:

[0033] The two truss blocks 100 are pulled by two groups of bracing devices 200, and the bracing device 200 comprises a bracing base plate 210, a first swing base 220, a turning bracing rod 230, a second swing base 240 and a locking bracing rod 250. The bracing base plate 210 is connected with the cross steel frame 110, the first swing base 220 is arranged on the bracing base plate 210, one end of the turning bracing rod 230 is rotationally connected with the first swing base 220, the other end of the turning bracing rod 230 is arranged on the second swing base 240, one end of the locking bracing rod 250 is rotationally connected with the second swing base 240, and the turning bracing rod 230 and the locking bracing rod 250 rotate in the same plane and intersect with the plane where the cross steel frame 110 is located.

[0034] The locking device 300 is used for locking and fixing the locking bracing rods 250 of the two groups of bracing devices 200.

[0035] When the two truss blocks 100 are spliced along the extending direction thereof, the locking bracing rods 250 of the two groups of bracing devices 200 are arranged in parallel and close to each other.

[0036] As shown in Figure 1 In the embodiment, the truss block 100 can extend in a smooth curve to be suitable for the special-shaped steel structure of a stadium and the like, and of course, the truss block 100 can also extend in a straight line to be suitable for a regular steel structure. The two truss blocks 100 are spliced along the extending direction thereof, and the connection can be realized by a welding fixing mode. The side, where the two truss blocks 100 are close to each other, is provided with a plurality of welding positions which need to be aligned. Before the welding operation, the position of the two truss blocks 100 can be adjusted by a jack to ensure the accuracy of the welding position.

[0037] After the welding positions of the two truss blocks 100 are aligned, the bracing devices 200 on the two truss blocks 100 are locked and fixed by the locking device 300, so that the two truss blocks 100 are pulled by the two connected bracing devices 200, and the position of the truss block 100 after the adjustment is basically kept unchanged, so as to facilitate the welding operation of the welding positions of the two truss blocks 100.

[0038] As shown in Figure 1 and Figure 2As shown, in the embodiment, since two groups of bracing devices 200 are arranged between the two adjacent truss blocks 100, and bracing is performed through the two groups of bracing devices 200, the number of the bracing devices 200 should be twice of the number of the truss blocks 100 minus one, that is, the number of the truss blocks 100 is n, and the number of the bracing devices 200 is (n-1)*2. The bracing device 200 can also be made of steel, so that the bracing between the two adjacent truss blocks 100 is rigid bracing, and the bracing has strong bracing strength.

[0039] As shown in FIG. 6, the bracing device 200 can be arranged on the truss block 100, and the bracing device 200 can be arranged on the truss block 100 in a manner of being arranged on the cross steel frame 110 of the truss block 100. Figure 2 and Figure 3 As shown, the bracing base plate 210 can be arranged in a rectangular shape and made of steel, and is connected with the cross steel frame 110 on the truss block 100. Since the cross steel frame 110 is arranged in a plane, the bracing base plate 210 can be abutted on one side of the cross steel frame 110, so as to have a larger contact area with the cross steel frame 110. The cross steel frame 110 can be arranged at the middle of the truss block 100 along the extension direction of the truss block 100, so that the connecting point of the bracing device 200 and the truss block 100 is closer to the center of gravity of the truss block 100, thereby improving the bracing effect. The first swing base 220 can be welded and fixed at the middle position of the bracing base plate 210, and the one end of the turning bracing rod 230 is rotationally arranged on the first swing base 220. The second swing base 240 can be welded and fixed at the other end of the turning bracing rod 230, and the one end of the locking bracing rod 250 is rotationally arranged on the second swing base 240. The turning bracing rod 230 and the locking bracing rod 250 are arranged in the same plane and rotate in the same plane. When the locking bracing rod 250 rotates around the second swing base 240, it can form a "V" shaped structure with the turning bracing rod 230, or a structure similar to a boomerang. When the turning bracing rod 230 rotates around the first swing base 220, the "V" shaped structure can rotate around the end point. When the turning bracing rod 230 rotates, it can pass through the steel pipe and other structures of the truss block 100 itself, so as to extend the locking bracing rod and approach the other truss block 100. When the locking bracing rods 250 of the two truss blocks 100 are extended, the two locking bracing rods 250 can also rotate to approach each other, and can also be parallel to each other, and then the two locking bracing rods 250 can be locked and fixed by the locking device 300.

[0040] It can be understood that the present application sets the bracing device 200 on the cross steel frame 110 of the truss block 100, and avoids the turning bracing rod 230 and the locking bracing rod 250 from the structure of its own steel pipe through the first swing base 220 and the second swing base 240, so that the locking bracing rods 250 of the two groups of bracing devices 200 are close to each other and parallel, and the two locking bracing rods 250 are locked and fixed through the locking device 300. After the welding positions of the two adjacent truss blocks 100 are aligned, the two adjacent truss blocks 100 are braced through the two groups of bracing devices 200, so as to keep the splicing position of the two adjacent truss blocks 100, and then the accuracy of the splicing position is ensured.

[0041] Specifically, the truss block 100 further comprises a fixed base plate 120, which is arranged on the cross steel frame 110 and is arranged on the two sides of the cross steel frame 110 respectively with the bracing base plate 210. The bracing base plate 210 and the fixed base plate 120 are detachably connected.

[0042] As shown in Figure 2 and Figure 3 In this embodiment, the fixed base plate 120 can also be rectangular and made of steel plate. The fixed base plate 120 and the bracing base plate 210 can be arranged opposite to each other and arranged on the two sides of the cross steel frame 110 respectively. The detachable connection between the bracing base plate 210 and the fixed base plate 120 can be connected by bolt connectors, which can be screw rods and nuts arranged at both ends of the screw rods. The bolt connectors can be arranged at the four corners of the fixed base plate 120 and the bracing base plate 210. Four groups of bolt connectors can clamp and fix the bracing base plate 210 and the fixed base plate 120 on the cross steel frame 110.

[0043] It can be understood that by arranging the fixed base plate 120 and arranging the fixed base plate 120 and the bracing base plate 210 on the two sides of the cross steel frame 110 respectively, the bracing device 200 can form a connection with the truss block 100 that is not easy to be separated, so as to avoid failure of the bracing device 200 when bracing the truss block 100, and ensure the effectiveness of the bracing device 200 when bracing the truss block 100.

[0044] More specifically, when the assembled steel structure comprises at least three truss blocks 100, the cross steel frame 110 of the truss block 100 located in the middle position is provided with a group of bracing devices 200 on the two sides respectively, wherein the bracing base plate 210 of one group of bracing devices 200 constitutes the fixed base plate 120 of the other group of bracing devices 200.

[0045] As shown in Figure 4As shown, in the present embodiment, it is exemplarily illustrated that when the truss blocks 100 are greater than or equal to three, the truss block 100 located in the middle position needs to be braced with the truss blocks 100 located on both sides, that is, two groups of bracing devices 200 need to be arranged on the cross steel frame 110 of the truss block 100. Taking the example of three truss blocks 100 being continuously spliced, on the truss block 100 located in the middle position, the bracing base plates 210 in the two groups of bracing devices 200 can be arranged on the two sides of the cross steel frame 110 of the truss block 100, respectively, and can be detachably connected through the bolted connecting pieces. At this time, the bracing base plate 210 in any one group of bracing devices 200 can be regarded as a fixed base plate 120 detachably connected with the bracing base plate 210 in the other group of bracing devices 200, and an additional fixed base plate 120 does not need to be separately arranged. The truss blocks 100 located at both ends need to be braced with the truss block 100 located in the middle position, so only one group of bracing devices 200 is arranged on the truss block 100, and therefore an additional fixed base plate 120 needs to be separately arranged when the bracing device 200 is connected with the cross steel frame 110.

[0046] As shown, Figure 4 It can be understood that when the truss blocks 100 are greater than or equal to three, except for the truss blocks 100 located at both ends, the two sides of any truss block 100 have at least one truss block 100, and since the bracing base plate 210 in the bracing device 200 for bracing is detachably arranged on the two sides of the cross steel frame 110 of the truss block 100, the two parts of truss blocks 100 on the two sides of the truss block 100 can form a pair of braces, and the stress on the truss block 100 is reduced, so that the present embodiment can reduce the possibility of deformation of the truss blocks 100 other than the truss blocks 100 located at both ends due to stress, and further reduce the influence of bracing on the structural stability of the truss blocks 100. At the same time, after the steel structure is completed after assembly construction, the aforementioned bracing devices 200 connected in sequence in the truss block 100 can improve the connection effect between each block of the steel structure, and further improve the overall structural stability of the assembled steel structure.

[0047] It can also be understood that when the truss blocks 100 are spliced into a structure similar to a ring or a frame, a plurality of truss blocks 100 are connected end to end. At this time, the number of groups of bracing devices 200 is twice the number of truss blocks 100, and the two sides of any truss block 100 have at least one truss block 100. A plurality of bracing devices 200 are also connected end to end in the truss block 100 to form a structure similar to a ring or a frame along the same extension direction as the truss block 100.

[0048] Specifically, the locking device 300 comprises two locking unit bodies 310, which are arranged in opposition and detachably connected, and each of the two locking unit bodies 310 is provided with a clamping groove 311 on the side close to the other, and the clamping groove 311 corresponds to one of the locking pull struts 250, and the locking pull struts 250 are arranged in the two opposed clamping grooves 311.

[0049] As shown in the drawings, Figure 3 In this embodiment, the locking unit body 310 is exemplarily made of a steel block, which can be provided in a cuboid shape. The cross section of the clamping groove 311 can be provided in a semicircle, and the clamping groove 311 is provided with two, corresponding to the two locking pull struts 250. The two clamping grooves 311 can be arranged in the length direction of the locking unit body 310, and the interval can be adjusted according to actual needs; and the width direction of the locking unit body 310 is the axial direction of the locking pull strut 250. The two locking unit bodies 310 are arranged in opposition in the thickness direction, so that the four clamping grooves 311 are arranged in opposition to form two cylindrical cavities, and then used to arrange the two locking pull struts 250. The two locking unit bodies 310 clamp and fix the locking pull struts 250 on both sides to achieve the purpose of connecting the two locking pull struts 250. The inner side of the clamping groove 311 can be fixed with a non-slip pad to increase the frictional resistance between the locking unit body 310 and the locking pull strut 250. The two locking unit bodies 310 can also be detachably connected by a bolted joint, and the bolted joint can be a screw rod and a nut arranged on both sides of the screw rod.

[0050] It can be understood that, by arranging the locking device 300 as two locking unit bodies 310 and arranging the clamping grooves 311 on the locking unit bodies 310, the locking pull struts 250 can be clamped and fixed when the two locking unit bodies 310 are assembled, which is simple to operate and convenient to construct.

[0051] More specifically, the locking device 300 is provided at least two, and is close to the end of the two locking pull struts 250, and the locking device 300 close to the end of the locking pull strut 250 is arranged in the interval of the end of the locking pull strut 250.

[0052] As shown in the drawings, Figure 3As shown, in the present embodiment, it is exemplarily illustrated that when the two locking tie rods 250 are arranged close to and parallel to each other, the end of any locking tie rod 250 away from the second swing base 240 is located at the middle of the other locking tie rod 250. When the locking device 300 is arranged to lock and fix the two locking tie rods 250, two locking devices 300 are needed to be arranged close to the end of the two locking tie rods 250 away from the second swing base 240. At the same time, in order to avoid the locking device 300 from being separated from one of the locking tie rods 250 when the locking device 300 moves on the locking tie rod 250, the locking device 300 is also arranged to be spaced apart from the end of the locking tie rod 250 close to the locking device 300. For example, when the first end of one of the locking tie rods 250 is close to the locking device 300, the locking device 300 is arranged to be spaced apart from the first end of the locking tie rod 250 when the locking device 300 clamps and fixes the two locking tie rods 250. When the number of the locking devices 300 is greater than two, the plurality of locking devices 300 are arranged at equal intervals between the ends of the two locking tie rods 250 away from the second swing base 240, and at least two locking devices 300 are arranged close to the ends of the two locking tie rods 250.

[0053] It can be understood that, by arranging the locking device 300 at least close to the ends of the two locking tie rods 250, the locking effect of the locking device 300 on the two locking tie rods 250 can be improved, and the load bearing capacity of the two locking tie rods 250 after being connected can be improved, thereby ensuring the stability and effectiveness of the rigid tie between the two adjacent truss sub-blocks 100.

[0054] More specifically, the radii of the two opposite clamping grooves 311 of the locking device 300 close to the ends of the locking tie rods 250 are smaller than the radii of the other two opposite clamping grooves 311, and the two clamping grooves 311 with smaller radii are used to press the ends of the locking tie rods 250 close to the locking device 300, so that the ends of the locking tie rods 250 form necked sections.

[0055] As Figure 3As shown in this embodiment, for the two locking devices 300 near the ends of the two locking struts 250, along the length of the locking unit body 310, the radii of the two slots 311 are different sizes. One slot 311 may have a radius equal to the outer diameter of the locking strut 250, while the other slot 311 may have a radius slightly smaller than the outer diameter of the locking strut 250. When the two locking unit bodies 310 are aligned, and the four slots 311 enclose two cylindrical cavities, the radius of one cylindrical cavity is smaller than the outer diameter of the locking strut 250, while the radius of the other cylindrical cavity is equal to the outer diameter of the locking strut 250. When the two locking devices 300 lock the two locking struts 250 at their ends near the locking devices 300, the side of the slot 311 with the smaller radius is used to clamp the end of the locking strut 250 near the locking device 300. At this time, the two locking units 310 can squeeze the end of the locking strut 250 to reduce its outer diameter along the axis, thereby forming a necked section. To facilitate the deformation of the end of the locking strut 250, a slit can be cut on this end of the locking strut.

[0056] It is understood that, by reasonably setting the radius of the slots 311 of the two locking devices 300 near the ends of the two locking bracing rods 250, this embodiment can make the two locking devices 300 form an axial limit with the two locking bracing rods 250 at the positions near the ends of the two locking bracing rods 250, thereby making it difficult for the two locking devices 300 to move.

[0057] Specifically, the length of the locking strut 250 is greater than the length of the steering strut 230.

[0058] like Figure 2 and Figure 3 As shown in this embodiment, by way of example, when the length of the locking brace 250 is short, it is less likely to interfere with the steel pipe of the truss block 100 itself when rotating within the truss block 100, and the range of rotation is larger; while when the length of the locking brace 250 is longer, it can ensure that the two locking braces 250 are close to each other and arranged parallel to each other within a larger range of rotation. In summary, when the length of the locking brace 250 is greater than the length of the steering brace 230, it can ensure that the two bracing devices 200 can achieve a reliable connection while effectively avoiding the truss block 100.

[0059] Specifically, the first swing base 220 comprises a first fixed plate 221 and a first rotating seat 222, the first fixed plate 221 is arranged on the tensioning base plate 210, the first rotating seat 222 is arranged on the side of the first fixed plate 221 away from the tensioning base plate 210, the first rotating plate 231 is arranged on the end of the turning tensioning rod 230 close to the first swing base 220, the first rotating plate 231 extends into the first rotating seat 222, and the first rotating plate 231 is rotatably connected to the first rotating seat 222 through a set of bolt connecting pieces.

[0060] The second swing base 240 comprises a second fixed plate 241 and a second rotating seat 242, the second fixed plate 241 is arranged on the end of the turning tensioning rod 230 away from the first swing base 220, the second rotating seat 242 is arranged on the second fixed plate 241, the second rotating plate 251 is arranged on the end of the locking tensioning rod 250 close to the second swing base 240, the second rotating plate 251 extends into the second rotating seat 242, and the second rotating plate 251 is rotatably connected to the second rotating seat 242 through a set of bolt connecting pieces.

[0061] As shown in the drawings, Figure 3 In this embodiment, the first fixed plate 221 is rectangular and made of steel plate, which is welded to the tensioning base plate 210. The first rotating seat 222 is made of two steel plates, which are welded to the first fixed plate 221 to form a gap for the first rotating plate 231 to extend into. The first rotating plate 231 is made of steel plate. The bolt connecting piece comprises a screw rod and nuts arranged at both ends of the screw rod. The screw rod penetrates the first rotating seat 222 and the first rotating plate 231 to rotatably connect them. The nuts are threadedly connected to the screw rod and abut against the first rotating seat 222. The second swing base 240 is arranged in the same way.

[0062] It can be understood that, by reasonably arranging the structures of the first swing base 220 and the second swing base 240, the turning of the turning tensioning rod 230 and the locking tensioning rod 250 can be realized by the first swing base 220 and the second swing base 240 respectively, and the turning directions of the turning tensioning rod 230 and the locking tensioning rod 250 can be arranged in the same plane.

[0063] Specifically, the truss block 100 further comprises top chords 130 and bottom chords 140, the top chords 130 and the bottom chords 140 are arranged in two horizontal planes at different heights and are spaced apart by two, the cross steel frame 110 is arranged in a vertical plane and is connected to the two top chords 130 and the two bottom chords 140.

[0064] As shown in the drawings, Figure 1 and Figure 2As shown, in the embodiment, it is exemplarily illustrated that two top chords 130 and two bottom chords 140 can be respectively arranged at four corners of the cross steel frame 110, and the cross steel frame 110 can be arranged along the extension direction of the top chord 130 and the bottom chord 140, and the cross steel frame 110 for arranging the tension brace device 200 is arranged at the middle position of the top chord 130 and the bottom chord 140, and the cross steel frame 110 can be vertically arranged so as to facilitate the connection of the two groups of tension brace devices 200. In the embodiment, the turning tension brace rod 230 and the locking tension brace rod 250 can rotate in the horizontal plane. Embodiment

[0065] The embodiment two of the application provides a construction method of any one of the assembled steel structures provided by the application, and the construction method comprises the following steps:

[0066] S1, welding and fixing steel pipes into truss blocks 100 on the ground, and arranging the tension brace device 200 on the cross steel frame 110 of the truss block 100 by using steel pipes, steel plates and steel blocks;

[0067] S2, hoisting the truss block 100 by using hoisting equipment, and setting temporary supports on the ground so as to adjust the assembly of the truss block 100;

[0068] S3, adjusting the position of the truss block 100 on the temporary support by using a jack so as to align the welding positions of the two adjacent truss blocks 100;

[0069] S4, locking and fixing the locking tension brace rods 250 of the two tension brace devices 200 by using the locking device 300;

[0070] S5, welding the welding positions of the two adjacent truss blocks 100.

[0071] According to the application, the tension brace device 200 is arranged on the cross steel frame 110 of the truss block 100, and the turning tension brace rod 230 and the locking tension brace rod 250 are avoided from the steel pipe and other structures of the tension brace device 200 by using the first swing base 220 and the second swing base 240, so that the locking tension brace rods 250 of the two groups of tension brace devices 200 are close to each other and kept parallel, and the two locking tension brace rods 250 are locked and fixed by using the locking device 300, so that the two adjacent truss blocks 100 can be pulled by using the two groups of tension brace devices 200 after the welding positions of the two adjacent truss blocks 100 are aligned, the assembly position of the two adjacent truss blocks 100 is kept, and the accuracy of the assembly position is ensured.

[0072] The above are the preferred embodiments of the application, which do not limit the protection scope of the application, and therefore: any equivalent changes made on the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A prefabricated steel structure, the prefabricated steel structure comprising at least two truss blocks (100), the two truss blocks (100) being spliced ​​together along their extending direction, characterized in that, The truss block (100) includes at least one cross steel frame (110), the cross steel frame (110) being arranged in a plane, and the assembled steel structure further includes: The truss sections (100) are each supported by two sets of truss support devices (200). Each truss section (100) is supported by two sets of truss support devices (200). Each truss support device (200) includes a truss base plate (210), a first rocker base (220), a steering truss rod (230), a second rocker base (240), and a locking truss rod (250). The truss base plate (210) is connected to the cross steel frame (110). The first rocker base (220) is disposed on the truss base plate. On the plate (210), one end of the steering brace (230) is rotatably connected to the first rocker base (220), the second rocker base (240) is disposed at the other end of the steering brace (230), one end of the locking brace (250) is rotatably connected to the second rocker base (240), the steering brace (230) and the locking brace (250) rotate in the same plane and intersect with the plane where the cross steel frame (110) is located; A locking device (300) is used to lock and fix the locking bracing rods (250) of the two sets of bracing devices (200); When two truss blocks (100) are spliced ​​together along their extension direction, the locking bracing rods (250) of the two sets of bracing devices (200) are close to each other and arranged in parallel.

2. The assembled steel structure according to claim 1, characterized in that, The truss block (100) also includes a fixed base plate (120), which is disposed on the cross steel frame (110) and is disposed on both sides of the cross steel frame (110) along with the bracing base plate (210). The bracing base plate (210) and the fixed base plate (120) are detachably connected.

3. The assembled steel structure according to claim 2, characterized in that, When the assembled steel structure includes at least three truss blocks (100), a set of the bracing devices (200) are respectively provided on both sides of the cross steel frame (110) of the truss block (100) located in the middle position, wherein the bracing base plate (210) of the set of bracing devices (200) constitutes the fixed base plate (120) of the other set of bracing devices (200).

4. The assembled steel structure according to claim 1, characterized in that, The locking device (300) includes two locking units (310), which are arranged opposite each other and are detachably connected. Each of the two locking units (310) has a slot (311) on the side that is close to each other. The slot (311) corresponds to the locking strut (250) one by one. The locking strut (250) is arranged in the two opposite slots (311).

5. The assembled steel structure according to claim 4, characterized in that, At least two locking devices (300) are provided, and are respectively located near the ends of the two locking bracing rods (250). The locking devices (300) near the ends of the locking bracing rods (250) are spaced apart from the ends of the locking bracing rods (250).

6. The assembled steel structure according to claim 5, characterized in that, The locking device (300) near the end of the locking strut (250) has two mating slots (311) with radii smaller than the other two mating slots (311). The two smaller slots (311) are used to press the end of the locking strut (250) near the locking device (300) to form a necked section at the end of the locking strut (250).

7. The assembled steel structure according to claim 1, characterized in that, The length of the locking strut (250) is greater than the length of the steering strut (230).

8. The assembled steel structure according to claim 1, characterized in that, The first rocking base (220) includes a first fixed plate (221) and a first rotating seat (222). The first fixed plate (221) is disposed on the tension base plate (210), and the first rotating seat (222) is disposed on the side of the first fixed plate (221) away from the tension base plate (210). The first rotating plate (231) is disposed at one end of the steering tension rod (230) near the first rocking base (220). The first rotating plate (231) extends into the first rotating seat (222) and is rotatably connected by a set of bolts. The second rocking base (240) includes a second fixed plate (241) and a second rotating seat (242). The second fixed plate (241) is disposed on the end of the steering brace (230) away from the first rocking base (220). The second rotating seat (242) is disposed on the second fixed plate (241). The locking brace (250) is provided with a second rotating plate (251) at the end near the second rocking base (240). The second rotating plate (251) extends into the second rotating seat (242) and is rotatably connected by a set of bolts.

9. The assembled steel structure according to claim 1, characterized in that, The truss block (100) also includes a top chord (130) and a bottom chord (140). The top chord (130) and the bottom chord (140) are respectively set in two horizontal planes at different heights and are spaced apart. The cross steel frame (110) is set in a vertical plane and is connected to the two top chords (130) and the two bottom chords (140).

10. A construction method for an assembled steel structure as described in any one of claims 1 to 9, characterized in that, The construction method includes: Steel pipes are welded and fixed on the ground to form truss blocks (100), and steel pipes, steel plates and steel blocks are used to arrange the bracing device (200) on the cross steel frame (110) of the truss blocks (100); The truss section (100) is hoisted using hoisting equipment, and temporary supports are set up on the ground to facilitate the adjustment of the assembly of the truss section (100); The position of the truss block (100) is adjusted on the temporary support by jacks to align the welding positions of two adjacent truss blocks (100); The locking bracing rods (250) of the two bracing devices (200) are locked and fixed by the locking device (300); Welding is performed on the welding positions of two adjacent truss blocks (100).

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