A support-free construction method for a large-span oblique connected steel structure

Abstract

The present invention is a support-free construction method for a large-span oblique connected steel structure, and the specific steps are: construction of a steel frame structure tower and a steel frame structure podium; installation of the upper segment of the lower oblique beam, the lower segment of the lower oblique beam, and the horizontal steel beam; installation of the middle and lower segment of the lower oblique beam; installation of the middle and upper segment of the lower oblique beam; installation of the vertical steel column and the horizontal steel beam of the lower left side portion; installation of the vertical steel column and the horizontal steel beam of the middle left side portion; installation of the vertical steel column, the horizontal steel beam and the lower segment of the upper oblique beam of the middle right side portion; installation of the vertical steel column, the horizontal steel beam and the upper segment of the upper oblique beam of the upper right side portion; middle cable unloading construction; upper cable and lower cable unloading construction. The present invention can solve the construction difficulties of a large-span oblique connected steel frame structure, save a lot of temporary support erection work, effectively control the use of materials while ensuring the construction quality, improve construction efficiency, and reduce construction costs; no need to occupy the lower space, creating convenience for other construction.

Description

Technical Field

[0001] The invention relates to the field of construction technology, and in particular to a support-free construction method of a large-span obliquely connected steel structure. Background Art

[0002] The large-span oblique steel structure is a novel structure with complex component arrangement. There are few similar engineering cases and construction methods available for reference, so the construction is difficult. A steel structure project consists of three steel frame towers, oblique steel frame structures arranged from bottom to top between the towers, and a steel frame podium. The building unit is in the shape of an "N" on three sides. The structure is novel, the oblique steel structure has a high installation height and a large span, and the construction is difficult. Summary of the invention

[0003] The present invention aims to effectively ensure the construction quality, reduce the construction cost and improve the construction efficiency while controlling the material usage, and provides a support-free construction method for a large-span oblique connected steel structure.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for constructing a large-span oblique connected steel structure without support, the specific steps are as follows:

[0006] S1. Construction of steel frame structure tower and steel frame structure podium:

[0007] Before constructing the oblique connected steel frame structure, the construction of the steel frame structure tower and the steel frame structure podium is completed. The steel frame structure tower is provided with a side oblique beam connected to the oblique connected steel frame structure. The steel frame structure tower is provided with a cable-steel member connection node assembly for connecting the cable assembly. The oblique connected steel frame structure is divided into a lower oblique beam, a horizontal steel beam, a vertical steel column, and an upper oblique beam.

[0008] S2. Install the upper section of the lower inclined beam, the lower section of the lower inclined beam, and the horizontal steel beam:

[0009] The lower end of the upper section of the lower inclined beam and the upper end of the lower section of the lower inclined beam are both provided with a cable-steel member connection node assembly for connecting with the cable assembly; the upper section of the lower inclined beam, the lower section of the lower inclined beam and the corresponding side inclined beam of the steel frame structure tower are fixedly connected through the inclined beam-beam column temporary fixed node assembly; the cable-steel member connection node assembly of the upper section of the lower inclined beam, the cable-steel member connection node assembly of the lower section of the lower inclined beam and the corresponding cable-steel member connection node assembly of the steel frame structure tower are tightened through the cable assembly; the horizontal steel beams at the lower part of the inclined connected steel frame structure are installed, and the floor slabs between the horizontal steel beams are constructed;

[0010] S3. Install the middle and lower sections of the lower inclined beam:

[0011] A cable-steel member connection node assembly is provided at the upper end of the middle and lower section of the lower inclined beam for connecting with the cable assembly; the middle and lower section of the lower inclined beam is fixedly connected with the lower section of the lower inclined beam through the inclined beam-inclined beam temporary fixed node assembly; the cable-steel member connection node assembly of the middle and lower section of the lower inclined beam and the cable-steel member connection node assembly corresponding to the steel frame structure tower are tightened through the cable assembly;

[0012] S4. Install the middle and upper sections of the lower inclined beam:

[0013] The middle and upper sections of the lower inclined beam are fixedly connected with the middle and lower sections of the lower inclined beam and the upper sections of the lower inclined beam through inclined beam-inclined beam temporary fixed node components respectively;

[0014] Weld the two ends of the lower inclined beam to the corresponding side inclined beams, and weld the lower inclined beam upper section, the lower inclined beam middle upper section, the lower inclined beam middle lower section, and the lower inclined beam lower section of the lower inclined beam in sequence;

[0015] S5. Install the vertical steel columns and horizontal steel beams on the lower left side:

[0016] Install the vertical steel columns and horizontal steel beams on the lower left side of the diagonal connected steel frame structure, and construct the floor slabs between the horizontal steel beams;

[0017] S6. Install the vertical steel columns and horizontal steel beams on the left side of the middle:

[0018] Continue to install the vertical steel columns and horizontal steel beams in the middle left part of the oblique connected steel frame structure toward the upper right side, and construct the floor slabs between the horizontal steel beams;

[0019] S7. Install the vertical steel column, horizontal steel beam and the lower section of the upper inclined beam in the middle right part:

[0020] Continue to install the vertical steel columns, horizontal steel beams and the lower section of the upper inclined beam of the middle right part of the inclined connected steel frame structure toward the upper right, and construct the floor slab between the horizontal steel beams and the lower section of the upper inclined beam;

[0021] S8. Install the vertical steel column, horizontal steel beam and upper section of the upper inclined beam on the upper right side:

[0022] Continue to the upper right side to complete the construction of the vertical steel columns, horizontal steel beams and the upper section of the upper inclined beam of the inclined connected steel frame structure, and construct the floor slab between the horizontal steel beams and the upper section of the upper inclined beam;

[0023] S9, Middle Cable Unloading Construction:

[0024] Use a jack to pre-tension the middle cable, and then use the jack to gradually unload the middle cable;

[0025] S10, upper cable and lower cable unloading construction:

[0026] Use jacks to pre-tension the upper and lower cables, and then use jacks to gradually unload the upper and lower cables; cut the inclined beam-beam-column temporary fixed node components and the inclined beam-inclined beam temporary fixed node components to complete the construction of the inclined connected steel frame structure between the two steel frame structure towers.

[0027] In step S1, the number and positions of the cable-steel member connection node assemblies on the steel frame structure tower used to connect with the cable assemblies are determined in advance by calculation. The cable-steel member connection node assemblies on the steel frame structure tower are installed when the steel members are produced and processed. When the steel frame structure tower is constructed, the cable-steel member connection node assemblies are hoisted together with the steel members of the steel frame structure tower.

[0028] In step S1, the inclined beam-beam-column temporary fixed node components on the side inclined beams of the steel frame structure tower have been installed during the production and processing of the steel components. When the steel frame structure tower is constructed, the inclined beam-beam-column temporary fixed node components are hoisted together with the steel components of the steel frame structure tower.

[0029] In step S2, the cable-steel member connection node assembly is installed when the steel members of the upper section and the lower section of the lower inclined beam are produced and processed, and the cable-steel member connection node assembly arrives at the construction site together with the upper section and the lower section of the lower inclined beam; the upper cable of the cable assembly is connected to the cable-steel member connection node assembly at the lower end of the upper section of the lower inclined beam, and the lower cable of the cable assembly is connected to the cable-steel member connection node assembly at the upper end of the lower section of the lower inclined beam, and the other end of the cable assembly is a free end.

[0030] In step S2, the upper section of the lower inclined beam and the lower section of the lower inclined beam are hoisted to the installation position respectively. When the crane is not unhooked, the electric hoist is used to fine-tune the position so that the upper section of the lower inclined beam and the lower section of the lower inclined beam are fixedly connected to the corresponding side inclined beam of the steel frame structure tower through the inclined beam-beam column temporary fixed node assembly; after the connection is completed, the crane is kept unhooked, the upper cable and the lower cable are in a natural drooping state, and auxiliary hemp ropes are tied at the free ends. The auxiliary hemp ropes touch the floor slab of the steel frame structure podium, and the electric hoist is lowered from the position of the corresponding cable-steel member connection node assembly on the steel frame structure tower. The cable is tied until it touches the floor slab of the steel frame structure podium, and the auxiliary hemp rope is tied to the lower end of the electric hoist cable. The electric hoist cable is used to drag the auxiliary hemp rope, the free end of the upper cable, and the free end of the lower cable to the position of the cable-steel member connection node assembly corresponding to the steel frame structure tower. The auxiliary hemp rope tied to the free end of the upper cable and the free end of the lower cable is loosened, and the free end of the upper cable and the free end of the lower cable are connected to the cable-steel member connection node assembly corresponding to the steel frame structure tower. The electric hoist is used to tighten, the crane is unhooked, and the upper section of the lower inclined beam and the lower section of the lower inclined beam are temporarily fixed.

[0031] In step S3, the cable-steel member connection node assembly is installed when the steel members of the lower and middle sections of the lower inclined beam are produced and processed, and the cable-steel member connection node assembly arrives at the construction site together with the lower and middle sections of the lower inclined beam; the middle cable of the cable assembly is connected to the cable-steel member connection node assembly at the upper end of the lower and middle sections of the lower inclined beam, and the other end of the middle cable is a free end.

[0032] In step S3, the middle and lower sections of the lower inclined beam are hoisted to the installation position. Without unhooking the crane, the electric hoist is used to fine-tune the position so that the middle and lower sections of the lower inclined beam are fixedly connected with the lower section of the lower inclined beam through the inclined beam-inclined beam temporary fixed node assembly. After the connection is completed, the crane is kept unhooked, the middle cable is in a natural drooping state, and an auxiliary hemp rope is tied at the free end. The auxiliary hemp rope touches the floor slab of the steel frame structure podium, and the electric hoist is lowered from the position of the corresponding cable-steel member connection node assembly on the steel frame structure tower. The cable is lifted until it touches the floor slab of the steel frame structure podium, and the auxiliary hemp rope is tied to the lower end of the electric hoist cable. The electric hoist cable is used to drag the auxiliary hemp rope and the free end of the middle cable to the position of the cable-steel component connection node assembly corresponding to the steel frame structure tower. The auxiliary hemp rope tied to the free end of the middle cable is loosened, and the free end of the middle cable is connected to the cable-steel component connection node assembly corresponding to the steel frame structure tower. The electric hoist is used to tighten it, the crane is unhooked, and the temporary fixation of the middle and lower sections of the lower inclined beam is completed.

[0033] In step S4, the middle-upper section of the lower inclined beam is lifted, and when the middle-upper section of the lower inclined beam is lifted to the installation position, the electric hoist is used to fine-tune the position without unhooking the crane to ensure successful installation of the inclined beam-oblique beam temporary fixed node components between the middle-upper section of the lower inclined beam and the middle-lower section of the lower inclined beam, and between the middle-upper section of the lower inclined beam and the upper section of the lower inclined beam.

[0034] The beneficial effects of the present invention are as follows: the present invention adopts a support-free construction method for a large-span obliquely connected steel structure, which can solve the construction difficulties of large-span obliquely connected steel frame structure projects, save a lot of temporary support erection work, and effectively control the use of materials while ensuring the construction quality of the large-span obliquely connected steel frame structure, thereby improving construction efficiency and reducing construction costs; in addition, since there is no need to erect temporary supports on the large-span obliquely connected steel frame structure, there is no need to occupy the lower space of the large-span obliquely connected steel frame structure during construction, which creates convenience for the construction of other parts carried out at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of step S1 in the present invention;

[0036] Figure 2 is a schematic diagram of step S2 in the present invention;

[0037] Figure 3 is a schematic diagram of step S3 in the present invention;

[0038] Figure 4 is a schematic diagram of step S4 in the present invention;

[0039] Figure 5 is a schematic diagram of step S5 in the present invention;

[0040] Figure 6 is a schematic diagram of step S6 in the present invention;

[0041] Figure 7 is a schematic diagram of step S7 in the present invention;

[0042] Figure 8 is a schematic diagram of step S8 in the present invention;

[0043] Fig. 9 is a schematic diagram of step S9 in the present invention;

[0044] Fig.10 is a schematic diagram of step S10 in the present invention;

[0045] Fig.11 It is a schematic diagram of a cable-steel member connection node assembly on the oblique connected steel frame structure of the present invention;

[0046] Fig.12 It is a front view of the cable-steel member connection node assembly on the steel frame structure tower in the present invention;

[0047] Fig.13 A top view of a cable-steel member connection node assembly on a steel frame structure tower in the present invention;

[0048] Fig.14 It is a schematic diagram of a temporary fixed node assembly of an inclined beam-beam column at the connection between a steel frame structure tower and an inclined connected steel frame structure in the present invention;

[0049] Fig.15 It is a cross-sectional view of the inclined beam-beam column temporary fixed node assembly in the present invention;

[0050] Fig.16 It is a schematic diagram of a temporary fixed node assembly of an oblique beam to an oblique beam at a segmented connection of an obliquely connected steel frame structure in the present invention;

[0051] Fig.17 It is a cross-sectional view of the inclined beam-inclined beam temporary fixed node assembly in the present invention;

[0052] In the figure: 1. Steel frame structure tower; 2. Steel frame structure podium; 3. Oblique connected steel frame structure; 4. Cable assembly; 5. Cable-steel member connection node assembly; 6. Inclined beam-beam column temporary fixed node assembly; 7. Inclined beam-inclined beam temporary fixed node assembly;

[0053] 11. Side inclined beam;

[0054] 31. Lower inclined beam; 32. Horizontal steel beam; 33. Vertical steel column; 34. Upper inclined beam;

[0055] 311, upper section of lower inclined beam; 312, lower section of lower inclined beam; 313, middle and lower section of lower inclined beam; 314, middle and upper section of lower inclined beam;

[0056] 41. Upper cable; 42. Middle cable; 43. Lower cable;

[0057] 51. Ear plate; 52. Plate; 53. Hole of ear plate; 54. Longitudinal stiffening rib inside steel member; 55. Transverse stiffening rib inside steel member; 56. Transverse stiffening rib outside steel member;

[0058] 61. Ear plate of the temporary fixed node between inclined beam and beam column; 62. Connection plate of the temporary fixed node between inclined beam and beam column; 63. Bolt of the temporary fixed node between inclined beam and beam column;

[0059] 71. Ear plate for temporary fixing node between inclined beam and inclined beam; 72. Connection plate for temporary fixing node between inclined beam and inclined beam; 73. Bolt for temporary fixing node between inclined beam and inclined beam;

[0060] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0061] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The embodiments are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail by way of example with reference to the accompanying drawings in the following paragraphs. The advantages and features of the present invention will become clearer according to the following description. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0062] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0064] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0065] In the present invention, the oblique connected steel frame structure 3 to be constructed can be divided into a lower oblique beam 31, a horizontal steel beam 32, a vertical steel column 33, and an upper oblique beam 34 for construction work. When the lower oblique beam 31 is constructed, it is further divided into an upper section 311 of the lower oblique beam, a lower section 312 of the lower oblique beam, a middle-lower section 313 of the lower oblique beam, and an upper-middle section 314 of the lower oblique beam. When the horizontal steel beam 32 and the vertical steel column 33 are constructed, they are constructed step by step from the lower left side to the upper right side and upward to the right. When the upper oblique beam 34 is constructed, it is also constructed step by step from the upper right side to the upper right side.

[0066] During the construction of the oblique steel frame structure 3 , a cable assembly 4 is required for temporary tensioning and fixing. The cable assembly 4 includes an upper cable 41 , a middle cable 42 and a lower cable 43 .

[0067] The connection between the steel frame structure tower 1, the oblique connected steel frame structure 3 and the cable assembly 4 is provided with a cable-steel member connection node assembly 5, which is arranged on the steel member of the steel frame structure tower 1 or the steel member of the oblique connected steel frame structure 3. The following discussion is mainly based on the steel member, and the steel frame structure tower 1 and the oblique connected steel frame structure 3 are not discussed separately. The specific structure of the cable-steel member connection node assembly 5 is as follows:

[0068] The cable-steel member connection node assembly 5 includes two ear plates 51 welded in parallel to the surface of the steel member, each ear plate 51 is provided with an ear plate hole 53, each ear plate 51 is welded with a plate 52 on both sides of the ear plate hole 53, a steel member inner longitudinal stiffening rib 54 is welded to the inner side of the steel member corresponding to each ear plate 51, five steel member inner transverse stiffening ribs 55 are welded perpendicularly to the two steel member inner longitudinal stiffening ribs 54 on the inner side of the steel member, and four steel member outer transverse stiffening ribs 56 are welded perpendicularly to the two ear plates 51 on the outer side of the steel member.

[0069] The two ear plates 51 are arranged in parallel, and are both welded and fixed to the surface of the steel member and are perpendicular to the surface.

[0070] The ear plate hole 53 is a circular structure.

[0071] The pasting plate 52 is annular, and two pasting plates 52 form a pair. The pair of pasting plates 52 are respectively fixed on both sides of the ear plate 51 by welding, and the center of the annular pasting plate 52 corresponds to the center of the circular ear plate hole 53.

[0072] The longitudinal stiffening rib 54 in a single steel member is a rectangular steel plate, and the longitudinal stiffening ribs 54 in two steel members are arranged on the inner surface of the steel member and perpendicular to the surface, and have the same size. The positions of the projections of the longitudinal stiffening ribs 54 in the two steel members on the plane of the steel member are the same as the positions, directions and lengths of the projections of the two ear plates 51 on the plane of the steel member.

[0073] The five transverse stiffening ribs 55 in the steel components are arranged in parallel and of the same size. They are all welded and fixed to the inner surface of the steel component and are perpendicular to the surface, and are perpendicular to the inner longitudinal stiffening ribs 54 of the steel component. Each individual transverse stiffening rib 55 in the steel component is composed of three rectangular steel plates, one of which is a larger rectangular steel plate arranged between the two inner longitudinal stiffening ribs 54 of the steel component, and two smaller rectangular steel plates are arranged on the outer sides of the two inner longitudinal stiffening ribs 54 of the steel component. The three rectangular steel plates are fixed to the inner longitudinal stiffening ribs 54 of the steel component and the inner surface of the steel component by welding.

[0074] The four steel member outer transverse stiffening ribs 56 are arranged in parallel and of the same size, and are welded and fixed to the outer surface of the steel member and perpendicular to the surface, and perpendicular to the ear plate 51. Each individual steel member outer transverse stiffening rib 56 is composed of three rectangular steel plates, one of which is a larger rectangular steel plate arranged between the two ear plates 51, and two smaller rectangular steel plates are arranged on the outer sides of the two ear plates 51. The three rectangular steel plates are fixed to the ear plates 51 and the outer surface of the steel member by welding.

[0075] The side oblique beam 11 of the steel frame structure tower 1 and the oblique connected steel frame structure 3 are fixedly connected by an oblique beam-beam column temporary fixed node assembly 6. The side oblique beam 11 and the oblique connected steel frame structure 3 are both square steel tube structures. Therefore, each side surface corresponding to the side oblique beam 11 and the oblique connected steel frame structure 3 is fixedly connected by a separate oblique beam-beam column temporary fixed node assembly 6. The specific structure of the oblique beam-beam column temporary fixed node assembly 6 is as follows:

[0076] Each inclined beam-beam-column temporary fixing node assembly 6 includes four inclined beam-beam-column temporary fixing node ear plates 61, two of which are welded on the side of the side inclined beam 11, and the other two are welded on the side of the inclined connected steel frame structure 3. The corresponding inclined beam-beam-column temporary fixing node ear plates 61 on the side of the side inclined beam 11 and the inclined connected steel frame structure 3 are connected by two inclined beam-beam-column temporary fixing node connecting plates 62. The two inclined beam-beam-column temporary fixing node connecting plates 62 are located on both sides of the inclined beam-beam-column temporary fixing node ear plates 61 and are fixed by inclined beam-beam-column temporary fixing node bolts 63.

[0077] The ear plate 61 of the inclined beam-beam-column temporary fixing node and the connecting plate 62 of the inclined beam-beam-column temporary fixing node are both rectangular steel plates, and bolt holes are provided on them.

[0078] The segments of the lower oblique beam 31 and the upper oblique beam 34 of the oblique connected steel frame structure 3 are fixedly connected by an oblique beam-oblique beam temporary fixed node assembly 7. The segments of the lower oblique beam 31 and the upper oblique beam 34 are all square steel tube structures. Therefore, each side surface corresponding to two adjacent segments is fixedly connected by a separate oblique beam-oblique beam temporary fixed node assembly 7. The specific structure of the oblique beam-oblique beam temporary fixed node assembly 7 is as follows:

[0079] The inclined beam-oblique beam temporary fixed node components 7 each include four inclined beam-oblique beam temporary fixed node ear plates 71, wherein two inclined beam-oblique beam temporary fixed node ear plates 71 are welded on the side of one of the segments, and the other two inclined beam-oblique beam temporary fixed node ear plates 71 are welded on the side of another adjacent segment, and the corresponding inclined beam-oblique beam temporary fixed node ear plates 71 on the sides of two adjacent segments are connected by two inclined beam-oblique beam temporary fixed node connecting plates 72, and the two inclined beam-oblique beam temporary fixed node connecting plates 72 are located on both sides of the inclined beam-oblique beam temporary fixed node ear plates 71 and are fixed by inclined beam-oblique beam temporary fixed node bolts 73.

[0080] The ear plate 71 of the inclined beam-to-oblique beam temporary fixed node and the connecting plate 72 of the inclined beam-to-oblique beam temporary fixed node are both rectangular steel plates, and bolt holes are provided on them.

[0081] A method for constructing a large-span oblique connected steel structure without support, the specific steps are as follows:

[0082] S1. Construction of steel frame structure tower 1 and steel frame structure podium 2: Before constructing the oblique steel frame structure 3, the construction of steel frame structure tower 1 and steel frame structure podium 2 is completed, and the steel frame structure tower 1 is provided with a side oblique beam 11 connected to the oblique steel frame structure 3, and the steel frame structure tower 1 is installed with a cable-steel member connection node assembly 5 for connecting with the cable assembly 4.

[0083] The specific construction process is as follows:

[0084] The number and positions of the cable-steel member connection node assemblies 5 for connecting with the cable assembly 4 on the steel frame structure tower 1 are determined in advance by calculation. The cable-steel member connection node assemblies 5 on the steel frame structure tower 1 are installed when the steel members are produced and processed. When the steel frame structure tower 1 is constructed, the cable-steel member connection node assemblies 5 are hoisted together with the steel members of the steel frame structure tower 1.

[0085] The inclined beam-beam-column temporary fixed node assembly 6 on the side inclined beam 11 of the steel frame structure tower 1 has been installed during the production and processing of the steel components. When the steel frame structure tower 1 is constructed, the inclined beam-beam-column temporary fixed node assembly 6 is hoisted together with the steel components of the steel frame structure tower 1.

[0086] In this embodiment, the ear plates 61 for temporarily fixing the nodes of the inclined beams and beam columns are installed when the steel components are produced and processed. When the steel frame structure tower 1 is constructed, the ear plates 61 for temporarily fixing the nodes of the inclined beams and beam columns are hoisted together with the steel components of the steel frame structure tower 1.

[0087] S2. Install the upper section 311 of the lower inclined beam, the lower section 312 of the lower inclined beam, and the horizontal steel beam 32: the lower end of the upper section 311 of the lower inclined beam and the upper end of the lower section 312 of the lower inclined beam are both provided with a cable-steel member connection node assembly 5 for connecting with the cable assembly 4; the upper section 311 of the lower inclined beam, the lower section 312 of the lower inclined beam and the corresponding side inclined beam 11 of the steel frame structure tower 1 are fixedly connected through the inclined beam-beam column temporary fixed node assembly 6; the cable-steel member connection node assembly 5 of the upper section 311 of the lower inclined beam and the cable-steel member connection node assembly 5 of the lower section 312 of the lower inclined beam and the corresponding cable-steel member connection node assembly 5 of the steel frame structure tower 1 are tightened through the cable assembly 4; the horizontal steel beam 32 of the lower part of the inclined connected steel frame structure 3 is installed, and the floor slab between the horizontal steel beams 32 is constructed.

[0088] The specific installation process is as follows:

[0089] The cable-steel member connection node assembly 5 has been installed during the production and processing of the steel members of the upper section 311 of the lower inclined beam and the lower section 312 of the lower inclined beam, and the cable-steel member connection node assembly 5 arrives at the construction site together with the upper section 311 of the lower inclined beam and the lower section 312 of the lower inclined beam; the upper cable 41 of the cable assembly 4 is connected to the cable-steel member connection node assembly 5 at the lower end of the upper section 311 of the lower inclined beam, and the lower cable 43 of the cable assembly 4 is connected to the cable-steel member connection node assembly 5 at the upper end of the lower section 312 of the lower inclined beam, and the other end of the cable assembly 4 is a free end.

[0090] The upper section 311 of the lower inclined beam and the lower section 312 of the lower inclined beam are hoisted to the installation position respectively. When the crane is not unhooked, the electric hoist is used to fine-tune the position so that the upper section 311 of the lower inclined beam and the lower section 312 of the lower inclined beam are fixedly connected with the corresponding side inclined beam 11 of the steel frame structure tower 1 through the inclined beam-beam column temporary fixed node assembly 6; after the connection is completed, the crane is kept unhooked, the upper cable 41 and the lower cable 43 are in a natural drooping state, and auxiliary hemp ropes are tied at the free ends. The auxiliary hemp ropes touch the floor slab of the steel frame structure podium 2, and the electric hoist slings are lowered from the position of the corresponding cable-steel member connection node assembly 5 on the steel frame structure tower 1 until Touch the floor slab of the steel frame structure podium 2, tie the auxiliary hemp rope to the lower end of the electric hoist sling, use the electric hoist sling to drag the auxiliary hemp rope, the free end of the upper cable 41, and the free end of the lower cable 43 to the position of the cable-steel member connection node assembly 5 corresponding to the steel frame structure tower 1, loosen the auxiliary hemp rope tied to the free end of the upper cable 41 and the free end of the lower cable 43, connect the free end of the upper cable 41 and the free end of the lower cable 43 to the cable-steel member connection node assembly 5 corresponding to the steel frame structure tower 1, use the electric hoist to tighten, unhook the crane, and the upper section 311 of the lower inclined beam and the lower section 312 of the lower inclined beam are temporarily fixed.

[0091] The specific positions and quantities of the cable-steel member connection node assembly 5 at the lower end of the lower inclined beam upper segment 311 and the cable-steel member connection node assembly 5 at the upper end of the lower inclined beam lower segment 312 will vary according to the angles of the lower inclined beam upper segment 311 and the lower inclined beam lower segment 312 and the positions of the cable-steel member connection node assembly 5 corresponding to the steel frame structure tower 1. For example, in this embodiment, a cable-steel member connection node assembly 5 is disposed on the upper surface of the lower end of the lower inclined beam upper segment 311, and a cable-steel member connection node assembly 5 is disposed on the upper surface and the lower surface of the upper end of the lower inclined beam lower segment 312.

[0092] When the cable assembly 4 is connected to the cable-steel member connection node assembly 5 of the upper section 311 of the lower inclined beam and the lower section 312 of the lower inclined beam, the cable assembly 4 is passed through the corresponding ear plate hole 53, and then the cable assembly 4 and the ear plate hole 53 are tied and fixed with a thin iron wire to form a fixed end, and the other end is a free end, and a hemp rope can be tied to the free end as an auxiliary rope.

[0093] In this embodiment, when the upper section 311 of the lower inclined beam, the lower section 312 of the lower inclined beam and the steel frame structure tower 1 are connected, four sets of inclined beam-beam column temporary fixed node components 6 are used for connection and fixation.

[0094] S3. Install the lower middle section 313 of the lower inclined beam:

[0095] A cable-steel member connection node assembly 5 for connecting to the cable assembly 4 is provided at the upper end of the middle and lower section 313 of the lower inclined beam; the middle and lower section 313 of the lower inclined beam is fixedly connected with the lower section 312 of the lower inclined beam via the inclined beam-inclined beam temporary fixed node assembly 7; the cable-steel member connection node assembly 5 of the middle and lower section 313 of the lower inclined beam and the cable-steel member connection node assembly 5 corresponding to the steel frame structure tower 1 are tightened via the cable assembly 4.

[0096] The specific installation process is as follows:

[0097] The cable-steel member connection node assembly 5 has been installed during the production and processing of the steel member of the lower middle section 313 of the lower inclined beam, and the cable-steel member connection node assembly 5 arrives at the construction site together with the lower middle section 313 of the lower inclined beam; the middle cable 42 of the cable assembly 4 is connected to the cable-steel member connection node assembly 5 at the upper end of the lower middle section 313 of the lower inclined beam, and the other end of the middle cable 42 is a free end.

[0098] The lower middle section 313 of the lower inclined beam is hoisted to the installation position. Without unhooking the crane, the electric hoist is used to fine-tune the position so that the lower middle section 313 of the lower inclined beam is fixedly connected with the lower section 312 of the lower inclined beam through the inclined beam-inclined beam temporary fixed node assembly 7. After the connection is completed, the crane is kept unhooked, the middle cable 42 is in a natural drooping state, and an auxiliary hemp rope is tied at the free end. The auxiliary hemp rope touches the floor slab of the steel frame structure podium 2, and the electric sling is lowered from the position of the corresponding cable-steel member connection node assembly 5 on the steel frame structure tower 1. Until it touches the floor slab of the steel frame structure podium 2, tie the auxiliary hemp rope to the lower end of the electric hoist sling, use the electric hoist sling to drag the auxiliary hemp rope and the free end of the middle cable 42 to the position of the cable-steel member connection node assembly 5 corresponding to the steel frame structure tower 1, loosen the auxiliary hemp rope tied to the free end of the middle cable 42, connect the free end of the middle cable 42 to the cable-steel member connection node assembly 5 corresponding to the steel frame structure tower 1, use the electric hoist to tighten, unhook the crane, and the temporary fixation of the middle and lower sections 313 of the lower inclined beam is completed.

[0099] The specific position and number of the cable-steel member connection node assembly 5 at the upper end of the lower middle section 313 of the lower inclined beam will vary according to the angle of the lower middle section 313 of the lower inclined beam and the position of the cable-steel member connection node assembly 5 corresponding to the steel frame structure tower 1. For example, in this embodiment, a cable-steel member connection node assembly 5 is provided on the upper surface and the lower surface of the upper end of the lower middle section 313 of the lower inclined beam.

[0100] When the cable assembly 4 is connected to the cable-steel member connection node assembly 5 of the lower section 313 of the lower inclined beam, the cable assembly 4 is passed through the corresponding ear plate hole 53, and the cable assembly 4 and the ear plate hole 53 are tied and fixed with thin iron wire.

[0101] In this embodiment, when the lower oblique beam middle section 313 is connected to the lower oblique beam upper section 311 and the lower oblique beam lower section 312, four sets of oblique beam-oblique beam temporary fixing node components 7 are used for connection and fixing.

[0102] S4, installing the lower oblique beam middle-upper section 314: hoist the lower oblique beam middle-upper section 314, and wait for the lower oblique beam middle-upper section 314 to be hoisted to the installation position. When the crane is not unhooked, use the electric hoist to fine-tune the position to ensure that the oblique beam-oblique beam temporary fixed node assembly 7 between the lower oblique beam middle-upper section 314 and the lower oblique beam middle-lower section 313 and between the lower oblique beam middle-upper section 314 and the lower oblique beam upper section 311 is successfully installed;

[0103] The two ends of the lower inclined beam 31 are welded to the corresponding side inclined beam 11, and the lower inclined beam upper section 311, the lower inclined beam middle upper section 314, the lower inclined beam middle lower section 313, and the lower inclined beam lower section 312 of the lower inclined beam 31 are welded in sequence;

[0104] S5. Install the vertical steel column 33 and the horizontal steel beam 32 at the lower left part: install the vertical steel column 33 and the horizontal steel beam 32 at the lower left part of the oblique connected steel frame structure 3, and construct the floor slab between the horizontal steel beams 32;

[0105] S6. Install the vertical steel column 33 and the horizontal steel beam 32 in the middle left part: Continue to install the vertical steel column 33 and the horizontal steel beam 32 in the middle left part of the oblique connected steel frame structure 3 upward to the right, and construct the floor slab between the horizontal steel beams 32;

[0106] S7, installing the vertical steel column 33, the horizontal steel beam 32 and the lower section of the upper inclined beam 34 in the middle right part: continue to install the vertical steel column 33, the horizontal steel beam 32 and the lower section of the upper inclined beam 34 in the middle right part of the inclined connected steel frame structure 3 toward the upper right side, and construct the floor slab between the horizontal steel beam 32 and the lower section of the upper inclined beam 34;

[0107] S8, installing the upper section of the vertical steel column 33, the horizontal steel beam 32 and the upper section of the upper inclined beam 34 on the upper right side: continue to complete the construction of the upper section of the vertical steel column 33, the horizontal steel beam 32 and the upper section of the upper inclined beam 34 of the inclined connected steel frame structure 3 toward the upper right side, and construct the floor slab between the upper sections of the horizontal steel beam 32 and the upper inclined beam 34;

[0108] S9, unloading construction of the middle cable 42: pre-tensioning the middle cable 42 with a jack, and then gradually unloading the middle cable 42 with a jack;

[0109] S10, unloading construction of upper cables 41 and lower cables 43: use jacks to pre-tension the upper cables 41 and lower cables 43, and then use jacks to gradually unload the upper cables 41 and lower cables 43; cut the inclined beam-beam column temporary fixed node assembly 6 and the inclined beam-inclined beam temporary fixed node assembly 7 to complete the construction of the inclined connected steel frame structure 3 between the two steel frame structure towers 1.

[0110] The obliquely connected steel frame structures 3 between the three steel frame structure towers 1 in the project can all be constructed in this way.

[0111] The present invention adopts a support-free construction method for a large-span oblique steel structure, which can solve the construction difficulties of the large-span oblique steel frame structure 3 project, save a lot of temporary support erection work, and effectively control the material usage while ensuring the construction quality of the large-span oblique steel frame structure 3, thereby improving construction efficiency and reducing construction costs. In addition, since there is no need to erect temporary supports on the large-span oblique steel frame structure 3, there is no need to occupy the lower space of the large-span oblique steel frame structure 3 during construction, which creates convenience for the construction of other parts carried out at the same time.

[0112] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A method for constructing a large-span oblique connected steel structure without support, characterized in that: The specific steps are: S1, Steel Frame Structure Tower (1), Steel Frame Structure Podium (2) Construction: Before constructing the obliquely connected steel frame structure (3), the construction of the steel frame structure tower (1) and the steel frame structure podium (2) is completed, the steel frame structure tower (1) is provided with a side oblique beam (11) connected to the obliquely connected steel frame structure (3), the steel frame structure tower (1) is provided with a cable-steel member connection node assembly (5) for connecting to the cable assembly (4), and the obliquely connected steel frame structure (3) is divided into a lower oblique beam (31), a horizontal steel beam (32), a vertical steel column (33), and an upper oblique beam (34); S2. Install the upper section of the lower inclined beam (311), the lower section of the lower inclined beam (312), and the horizontal steel beam (32): The lower end of the lower inclined beam upper section (311) and the upper end of the lower inclined beam lower section (312) are both provided with a cable-steel member connection node assembly (5) for connecting to the cable assembly (4); the lower inclined beam upper section (311), the lower inclined beam lower section (312) and the corresponding side inclined beam (11) of the steel frame structure tower (1) are fixedly connected via the inclined beam-beam column temporary fixed node assembly (6); the cable-steel member connection node assembly (5) of the lower inclined beam upper section (311), the cable-steel member connection node assembly (5) of the lower inclined beam lower section (312) and the corresponding cable-steel member connection node assembly (5) of the steel frame structure tower (1) are tightened via the cable assembly (4); the horizontal steel beam (32) at the lower part of the inclined connected steel frame structure (3) is installed, and the floor slab between the horizontal steel beams (32) is constructed; S3. Install the lower middle section (313) of the lower inclined beam: A cable-steel member connection node assembly (5) for connecting to a cable assembly (4) is provided at the upper end of the middle and lower section (313) of the lower inclined beam; the middle and lower section (313) of the lower inclined beam and the lower section (312) of the lower inclined beam are fixedly connected via an inclined beam-inclined beam temporary fixed node assembly (7); the cable-steel member connection node assembly (5) of the middle and lower section (313) of the lower inclined beam and the cable-steel member connection node assembly (5) corresponding to the steel frame structure tower (1) are tightened via the cable assembly (4); S4. Install the middle and upper section of the lower inclined beam (314): The lower inclined beam middle upper section (314) is fixedly connected to the lower inclined beam middle lower section (313) and the lower inclined beam upper section (311) respectively through inclined beam-inclined beam temporary fixed node components (7); Welding the two ends of the lower inclined beam (31) to the corresponding side inclined beam (11), and sequentially welding the lower inclined beam upper section (311), the lower inclined beam middle upper section (314), the lower inclined beam middle lower section (313), and the lower inclined beam lower section (312) of the lower inclined beam (31); S5. Install the vertical steel column (33) and horizontal steel beam (32) on the lower left side: Install the vertical steel columns (33) and horizontal steel beams (32) on the lower left side of the oblique connected steel frame structure (3), and construct the floor slab between the horizontal steel beams (32); S6. Install the vertical steel column (33) and horizontal steel beam (32) in the middle left part: Continue to install the vertical steel columns (33) and horizontal steel beams (32) in the middle left part of the oblique connected steel frame structure (3) toward the upper right side, and construct the floor slab between the horizontal steel beams (32); S7. Install the vertical steel column (33), horizontal steel beam (32) and the lower section of the upper inclined beam (34) in the middle right part: Continue to install the vertical steel column (33), the horizontal steel beam (32) and the lower section of the upper inclined beam (34) of the middle right part of the inclined connected steel frame structure (3) toward the upper right, and construct the floor slab between the horizontal steel beam (32) and the lower section of the upper inclined beam (34); S8. Install the vertical steel column (33), horizontal steel beam (32) and upper section of the upper inclined beam (34) on the upper right side: Continue to complete the construction of the vertical steel column (33), the horizontal steel beam (32) and the upper section of the upper inclined beam (34) of the inclined connected steel frame structure (3) toward the upper right side, and construct the floor slab between the upper sections of the horizontal steel beam (32) and the upper inclined beam (34); S9, middle cable (42) unloading construction: Using a jack to pre-tension the middle cable (42), and then using the jack to gradually unload the middle cable (42); S10, unloading construction of upper cable (41) and lower cable (43): The upper cables (41) and the lower cables (43) are pre-tensioned using a jack, and then the upper cables (41) and the lower cables (43) are gradually unloaded using the jack, and the inclined beam-beam column temporary fixed node assembly (6) and the inclined beam-inclined beam temporary fixed node assembly (7) are cut to complete the construction of the inclined connected steel frame structure (3) between the two steel frame structure towers (1).

2. The method for constructing a large-span oblique connected steel structure without support according to claim 1, characterized in that: In step S1, the number and positions of the cable-steel component connection node assemblies (5) on the steel frame structure tower (1) for connecting with the cable assembly (4) are determined in advance by calculation. The cable-steel component connection node assemblies (5) on the steel frame structure tower (1) are installed when the steel components are produced and processed. When the steel frame structure tower (1) is constructed, the cable-steel component connection node assemblies (5) are hoisted together with the steel components of the steel frame structure tower (1).

3. The unsupported construction method of a large-span obliquely connected steel structure according to claim 2 is characterized in that: In step S1, the inclined beam-beam-column temporary fixed node assembly (6) on the side inclined beam (11) of the steel frame structure tower (1) has been installed during the production and processing of the steel components. When the steel frame structure tower (1) is constructed, the inclined beam-beam-column temporary fixed node assembly (6) is hoisted together with the steel components of the steel frame structure tower (1).

4. The unsupported construction method of a large-span obliquely connected steel structure according to claim 3 is characterized in that: In step S2, the cable-steel member connection node assembly (5) is installed when the steel members of the upper section (311) and the lower section (312) of the lower inclined beam are produced and processed, and the cable-steel member connection node assembly (5) arrives at the construction site together with the upper section (311) and the lower section (312) of the lower inclined beam; the upper cable (41) of the cable assembly (4) is connected to the cable-steel member connection node assembly (5) at the lower end of the upper section (311) of the lower inclined beam, and the lower cable (43) of the cable assembly (4) is connected to the cable-steel member connection node assembly (5) at the upper end of the lower section (312) of the lower inclined beam, and the other end of the cable assembly (4) is a free end.

5. The unsupported construction method of a large-span obliquely connected steel structure according to claim 4 is characterized in that: In step S2, the upper section (311) of the lower inclined beam and the lower section (312) of the lower inclined beam are hoisted to the installation position respectively. When the crane is not unhooked, the electric hoist is used to fine-tune the position so that the upper section (311) of the lower inclined beam and the lower section (312) of the lower inclined beam are fixedly connected to the corresponding side inclined beam (11) of the steel frame structure tower (1) through the inclined beam-beam column temporary fixed node assembly (6); after the connection is completed, the crane is kept unhooked, the upper cable (41) and the lower cable (43) are both in a natural drooping state, and auxiliary hemp ropes are tied at the free ends. The auxiliary hemp ropes touch the floor slab of the steel frame structure podium (2), and the electric hoist is lowered from the position of the corresponding cable-steel member connection node assembly (5) on the steel frame structure tower (1). Until it touches the floor slab of the steel frame structure podium (2), the auxiliary hemp rope is tied to the lower end of the electric hoist sling, and the auxiliary hemp rope, the free end of the upper cable (41), and the free end of the lower cable (43) are dragged to the position of the cable-steel member connection node assembly (5) corresponding to the steel frame structure tower (1) by using the electric hoist sling, and the auxiliary hemp rope tied to the free end of the upper cable (41) and the free end of the lower cable (43) are loosened, and the free end of the upper cable (41) and the free end of the lower cable (43) are connected to the cable-steel member connection node assembly (5) corresponding to the steel frame structure tower (1), and the electric hoist is used to tighten, and the crane is unhooked, and the upper section (311) of the lower inclined beam and the lower section (312) of the lower inclined beam are temporarily fixed.

6. The method for constructing a large-span obliquely connected steel structure without support according to claim 5, characterized in that: In step S3, the cable-steel member connection node assembly (5) is installed during the production and processing of the steel member of the lower middle section (313) of the lower inclined beam, and the cable-steel member connection node assembly (5) arrives at the construction site together with the lower middle section (313) of the lower inclined beam; the middle cable (42) of the cable assembly (4) is connected to the cable-steel member connection node assembly (5) at the upper end of the lower middle section (313) of the lower inclined beam, and the other end of the middle cable (42) is a free end.

7. The unsupported construction method of a large-span obliquely connected steel structure according to claim 6 is characterized in that: In step S3, the lower middle section (313) of the lower inclined beam is hoisted to the position to be installed. When the crane is not unhooked, the electric hoist is used to fine-tune the position so that the lower middle section (313) of the lower inclined beam is fixedly connected with the lower section (312) of the lower inclined beam through the inclined beam-inclined beam temporary fixed node assembly (7). After the connection is completed, the crane is kept unhooked, the middle cable (42) is in a natural drooping state, and an auxiliary hemp rope is tied to the free end. The auxiliary hemp rope touches the floor slab of the steel frame structure podium (2), and the electric hoist is lowered from the position of the corresponding cable-steel member connection node assembly (5) on the steel frame structure tower (1). The sling is lifted until it touches the floor of the steel frame structure podium (2), and the auxiliary hemp rope is tied to the lower end of the electric hoist sling. The auxiliary hemp rope and the free end of the middle cable (42) are dragged to the position of the cable-steel member connection node assembly (5) corresponding to the steel frame structure tower (1) by using the electric hoist sling. The auxiliary hemp rope tied to the free end of the middle cable (42) is loosened, and the free end of the middle cable (42) is connected to the cable-steel member connection node assembly (5) corresponding to the steel frame structure tower (1). The electric hoist is used to tighten it, and the crane is unhooked. The temporary fixation of the middle and lower sections (313) of the lower inclined beam is completed.

8. The method for constructing a large-span obliquely connected steel structure without support according to claim 7, characterized in that: In step S4, the middle-upper section (314) of the lower inclined beam is hoisted, and when the middle-upper section (314) of the lower inclined beam is hoisted to the installation position, the electric hoist is used to fine-tune the position without unhooking the crane, so as to ensure that the inclined beam-oblique beam temporary fixed node assembly (7) between the middle-upper section (314) of the lower inclined beam and the middle-lower section (313) of the lower inclined beam, and between the middle-upper section (314) of the lower inclined beam and the upper section (311) of the lower inclined beam are successfully installed.

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