Construction method of cantilever steel truss

Abstract

The invention discloses a construction method of a cantilever steel truss. The construction method of the cantilever steel truss comprises the following steps that a supporting steel column penetrates through a floor and is fixed to a preset assembly position; supporting components are assembled on the supporting steel columns; the steel truss is hoisted and placed on the supporting component; and the steel truss and the core tube main body structure are welded and fixed. According to the construction method of the cantilever steel truss, when the rigid truss is installed and placed on the supporting component, the weight of the rigid truss acts on the supporting component and is transmitted to the supporting steel column through the supporting component, the supporting steel column transmits the acting force to the preset position, and therefore the problem that all the acting force acts on a floor is solved; therefore, the problem that construction is affected by insufficient floor bearing capacity is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of truss installation, and in particular to a cantilever steel truss construction method. Background Art

[0002] During the steel structure installation and construction process, when installing the cantilevered steel trusses of the top tower crown of a super-high-rise building, temporary supports are generally set up on the lower floors for construction. However, due to the insufficient bearing capacity of the steel beams and floor slabs on the lower floors, it is impossible to set up temporary supports on the lower floors to install the cantilevered steel trusses as usual. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a cantilever steel truss construction method to change the problem that all the forces act on the floor, thereby avoiding the problem that the floor bearing capacity is insufficient to affect the construction.

[0004] The present invention provides a cantilever steel truss construction method, comprising the following steps:

[0005] Pass the supporting steel columns through the floor and fix them at the preset assembly positions;

[0006] Assembling support members on the support steel columns;

[0007] Lift and place steel trusses onto supporting members;

[0008] The steel truss is welded and fixed to the core tube main structure.

[0009] In one embodiment, assembling the support member on the support steel column further comprises:

[0010] A supporting corbel is cantilevered and fixed on the supporting steel column;

[0011] Fixedly connecting the conversion steel beam between adjacent supporting corbels;

[0012] Fixing a supporting tire frame on the conversion steel beam;

[0013] A conversion platform is fixedly connected to the supporting tire frame;

[0014] An unloading support is provided on the conversion platform.

[0015] In one embodiment, the step of welding and fixing the steel truss to the core tube main structure further comprises:

[0016] Welding and fixing the inner cantilever steel truss to the core tube main structure;

[0017] Welding and fixing the annular truss to the inner cantilever steel truss;

[0018] The annular truss is welded and fixed to the core tube main structure by connecting steel beams.

[0019] In one embodiment, the construction method further comprises:

[0020] Disassemble the unloading support, the supporting tire frame and the supporting steel column in sequence.

[0021] The cantilever steel truss construction method provided by the present invention has the following advantages: when the steel truss is installed and the steel truss is placed on a supporting member, its weight acts on the supporting member and is transmitted to the supporting steel column through the supporting member. The supporting steel column transmits the force to a preset position to change the problem of all the forces acting on the floor, thereby avoiding the problem of insufficient bearing capacity of the floor affecting the construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a front view of the cantilever steel truss construction method provided by the present invention under construction status.

[0024] Figure 2 The present invention is a side view of the cantilever steel truss construction method under construction. DETAILED DESCRIPTION

[0025] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] The directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0029] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0030] See also Figure 1 and Figure 2 The cantilever steel truss construction method provided by the present invention comprises the following steps:

[0031] S1, pass the supporting steel column 2 through the floor 7 and fix it at the preset assembly position.

[0032] It can be understood that the supporting steel column 2 passes through the floor 7 of the lower floor, the height of the supporting steel column 2 above the floor can be 1.5m, the number of supporting steel columns 2 can be no less than two, and the passing through the floor 7 can be by opening a hole in the floor 7, and the supporting steel column 2 is fixed at the preset assembly position through the hole, and the preset assembly position can be the ground or other areas.

[0033] S2, assemble the supporting components on the supporting steel column 2.

[0034] It is understandable that the above steps may further include:

[0035] S201, cantilever and fix the supporting corbel 1 on the supporting steel column 2.

[0036] It can be understood that the number of the supporting corbels 1 can be a corresponding two, the supporting corbels 1 can be triangular, and the supporting steel columns 2 and the supporting corbels 1 can be welded.

[0037] S202, fixedly connecting the conversion steel beam 9 between adjacent supporting corbels 1.

[0038] It can be understood that the conversion steel beam 9 can be a supporting platform, the number of the conversion steel beams 9 can be two, and they are arranged in parallel and aligned between the supporting corbels 1. The conversion steel beam 9 and the supporting corbels 1 can be in the form of a hinged connection.

[0039] S203, fixing the supporting tire frame 3 on the conversion steel beam 9.

[0040] It is understandable that the supporting tire frame 3 can be connected and fixed to the steel beam 9 by bolts.

[0041] S204, fixing and connecting the conversion platform 4 on the supporting tire frame 3.

[0042] It is known that the conversion platform 4 can also be fixedly connected to the supporting tire frame 3 by bolt connection.

[0043] S205, setting an unloading support 5 on the conversion platform 4.

[0044] It is understandable that the unloading support 5 can also be connected to the conversion platform 4 by bolts, and the unloading support 5 is used to support the steel truss 6 .

[0045] S3, lifting the steel truss 6 and placing it on the supporting member.

[0046] It is understandable that the lifting can be achieved by some common lifting equipment on the market, and after the lifting, one end of the steel truss 6 is erected on the supporting member, that is, erected on the unloading support 5.

[0047] S4, welding and fixing the steel truss 6 and the core tube main structure 8.

[0048] It is understandable that the above steps may further include:

[0049] S401, welding and fixing the inner cantilever steel truss to the core tube main structure 8;

[0050] S402, welding and fixing the ring truss and the inner cantilever steel truss;

[0051] S403, the annular truss is welded and fixed to the core tube main structure 8 by connecting the steel beam.

[0052] It is understandable that before welding, position measurement can be performed using a total station to improve the welding accuracy of the steel truss 6 .

[0053] S5, dismantle the unloading support, supporting tire frame and supporting steel column in sequence.

[0054] S6, after the demolition is completed, the floor 7 can be re-cast.

[0055] From the above description, it can be known that the cantilever steel truss construction method provided by the present invention, when the steel truss 6 is installed, when the steel truss 6 is placed on the supporting member, its weight acts on the supporting member and is transmitted to the supporting steel column 2 through the supporting member. The supporting steel column 2 transmits the force to the preset position to change the problem of all the forces acting on the floor 7, thereby avoiding the problem of insufficient bearing capacity of the floor 7 affecting the construction.

[0056] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A cantilever steel truss construction method, It is characterized in that The steps include: Pass the supporting steel columns through the floor and fix them at the preset assembly positions; Assembling support members on the support steel columns; Lift and place the steel trusses onto the supporting members; The steel truss is welded and fixed to the core tube main structure.

2. The cantilever steel truss construction method according to claim 1, It is characterized in that The step of assembling the support member on the support steel column further comprises: A supporting corbel is cantilevered and fixed on the supporting steel column; Fixedly connecting the conversion steel beam between adjacent supporting corbels; Fixing a supporting tire frame on the conversion steel beam; A conversion platform is fixedly connected to the supporting tire frame; An unloading support is provided on the conversion platform.

3. The cantilever steel truss construction method according to claim 1, It is characterized in that The step of welding and fixing the steel truss to the core tube main structure further comprises: Welding and fixing the inner cantilever steel truss to the core tube main structure; Welding and fixing the annular truss to the inner cantilever steel truss; The annular truss is welded and fixed to the core tube main structure by connecting steel beams.

4. The cantilever steel truss construction method as claimed in claim 2, It is characterized in that The construction method also includes: Disassemble the unloading support, the supporting tire frame and the supporting steel column in sequence.

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