Construction method of tower crane supporting structure

Abstract

The invention provides a construction method of a tower crane supporting structure, which comprises the following steps: pouring a shear wall and a concrete coupling beam of a core tube, and embedding embedded parts in the shear wall and the concrete coupling beam before pouring; the two steel trusses are installed on the poured concrete coupling beam, and the steel trusses are fixedly connected with the embedded parts; the steel truss comprises an upper flange steel beam, a lower flange steel beam, a straight web member steel beam and an inclined web member steel beam, the upper flange steel beam is arranged above the lower flange steel beam, the straight web member steel beam is connected between the upper flange steel beam and the lower flange steel beam, and the inclined web member steel beam is connected between the upper flange steel beam and the lower flange steel beam; the first ends of the diagonal web member steel beams are connected to the connecting positions of the straight web member steel beams and the upper flange steel beams, and the second ends of the diagonal web member steel beams are connected to the connecting positions of the adjacent straight web member steel beams and the lower flange steel beams. The two steel trusses are fixed through the secondary beams, and the secondary beams do not need to damage a concrete structure when the two steel trusses are connected; and the steel truss is connected with the embedded part through the connecting rod.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 2021114444402, entitled "Tower crane support structure and implementation method", filed on November 30, 2021, the contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of building construction technology, in particular to a construction method of a tower crane support structure. BACKGROUND

[0003] In recent years, with the rapid development of cities, more and more commercial complexes and super high-rise buildings are being built, and the developers are under great financial pressure. The construction of commercial complexes is progressing rapidly, and the developers want to ensure the recovery of funds, so the commercial complexes are put into operation after the construction is completed. The original external tower crane needs to be removed because the adjacent commercial shopping center needs to be put into operation in advance, but the main structure of the adjacent super high-rise tower has not been completed. Tower crane is an essential vertical transportation machinery in construction, and it must be converted and reinstalled to ensure the smooth construction of the super high-rise building in the later stage. However, the existing internal climbing tower crane usually uses reinforced concrete as the tower crane foundation, which is very troublesome to remove and generates a large amount of garbage. Therefore, how to simplify the installation and removal process of the internal climbing tower crane is a problem that needs to be solved in the field. SUMMARY

[0004] The main purpose of the present application is to provide a construction method of a tower crane support structure to solve the problem of complex installation and removal process of the existing internal climbing tower crane.

[0005] In order to achieve the above-mentioned purpose, the present application provides a construction method of a tower crane support structure, comprising the following steps: S10: pouring the shear wall and the concrete coupling beam of the core tube, and embedding the embedded part in the shear wall and the concrete coupling beam before pouring; the shear wall has at least one pair of horizontally spaced concrete coupling beams; S20: installing two steel trusses on the poured concrete coupling beam and fixedly connecting the steel trusses with the embedded part; the two steel trusses are arranged in parallel; the steel truss changes the original fixed mode of reinforced concrete to the mode of using steel truss; the steel truss comprises an upper flange steel beam, a lower flange steel beam, a straight web steel beam and an inclined web steel beam, the upper flange steel beam is arranged above the lower flange steel beam, the straight web steel beam is connected between the upper flange steel beam and the lower flange steel beam, and the inclined web steel beam is connected between the upper flange steel beam and the lower flange steel beam; the first end of the inclined web steel beam is connected at the connection position of the straight web steel beam and the upper flange steel beam, and the second end of the inclined web steel beam is connected at the connection position of the adjacent straight web steel beam and the lower flange steel beam; S30: fixing the two steel trusses by a secondary beam; the secondary beam is arranged between the two steel trusses, and the secondary beam does not have to damage the concrete structure when connected between the two steel trusses; S40: connecting the steel truss with the embedded part through the connecting rod.

[0006] In one or some embodiments, when installing, only the processed section is hoisted to the floor, and the installation of the steel truss and the secondary beam is completed by assembling and welding; when disassembling, the cutting and disassembly are performed according to the hoisting calculation and hoisted out of the site; and the processed material can be recycled.

[0007] In one or some embodiments, in the S10 step, the pair of concrete coupling beams are arranged in parallel and at the same height in the vertical direction and are spaced apart in the horizontal direction; according to the need, shear-resistant steel plates can be additionally arranged in the concrete coupling beams in the core tube to increase the reinforcement of the shear wall.

[0008] In one or some embodiments, in the S20 step, the concrete coupling beam includes a first coupling beam and a second coupling beam arranged oppositely and in parallel, the first end of the upper flange steel beam is arranged on the first coupling beam, and the second end of the upper flange steel beam is arranged on the second coupling beam; the concrete coupling beam further includes a third coupling beam and a fourth coupling beam arranged oppositely and in parallel, the third coupling beam is located below the first coupling beam, the fourth coupling beam is located below the second coupling beam, the first end of the lower flange steel beam is arranged on the third coupling beam, and the second end of the lower flange steel beam is arranged on the fourth coupling beam; the upper flange steel beam can move relative to the second coupling beam in the length direction of the upper flange steel beam.

[0009] In one or some embodiments, in the S20 step, the tower crane support structure further includes: a first embedded part arranged on each of the concrete coupling beams; a first connecting plate arranged on the first embedded part of the first coupling beam, and the first end of the upper flange steel beam is connected to the first connecting plate; a second connecting plate arranged on the first embedded part of the third coupling beam, and the first end of the lower flange steel beam is connected to the second connecting plate.

[0010] In one or some embodiments, in the S20 step, the tower crane support structure further includes: a first limiting frame arranged on the first embedded part of the second coupling beam, and the second end of the upper flange steel beam is in limiting cooperation with the first limiting frame, the first limiting frame is used for limiting the movement of the upper flange steel beam in the vertical direction; a second limiting frame arranged on the first embedded part of the fourth coupling beam, and the second end of the lower flange steel beam is in limiting cooperation with the second limiting frame, the second limiting frame is used for limiting the movement of the lower flange steel beam in the vertical direction.

[0011] In one or some embodiments, in the step S20, a steel plate is welded on the first embedded part on the second cross beam, a polytetrafluoroethylene plate is padded on the steel plate, the second end of the upper flange steel beam is slidingly arranged on the polytetrafluoroethylene plate, the first limiting frame is two, the two first limiting frames are oppositely arranged and simultaneously welded on the first embedded part on the second cross beam, the two first limiting frames and the first embedded part enclose a clamping groove in the shape of an inverted T, and the second end of the upper flange steel beam is movably arranged in the clamping groove.

[0012] In one or some embodiments, in the step S20, a steel plate is welded on the first embedded part on the fourth cross beam, a polytetrafluoroethylene plate is padded on the steel plate, the second end of the lower flange steel beam is slidingly arranged on the polytetrafluoroethylene plate, the number and mounting mode of the second limiting frame are the same as those of the first limiting frame, and the second end of the lower flange steel beam is movably arranged in the clamping groove enclosed by the two second limiting frames and the corresponding first embedded part.

[0013] In one or some embodiments, the construction method of the tower crane supporting structure further comprises: S50: connecting the pull rod to the steel truss, and connecting the steel truss to the shear wall through the pull rod.

[0014] In one or some embodiments, in the step S50, the tower crane supporting structure further comprises a second embedded part arranged in the shear wall, and the pull rod is connected to the second embedded part; the first embedded part and the second embedded part are both made of small-section I-shaped steel as anchor rods.

[0015] The technical scheme of the present application changes the original fixed mode of reinforced concrete to the mode of using a steel truss, the steel truss has light self weight and large span, the installation and dismounting processes are simplified while reliability is ensured, in the installation process, only the processed section is hoisted to the floor, and the installation of the steel truss is completed through splicing and welding, in the dismounting process, cutting and dismounting are performed according to hoisting calculation, and the hoisted section is hoisted out of the site, the concrete structure does not need to be damaged, the installation and dismounting steps are greatly simplified, the materials can be recycled to save energy and protect the environment, and the safety is relatively high.

[0016] In addition to the objects, features and advantages described above, the present application has other objects, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings constituting a part of the specification of the present application serve to provide further understanding of the present application, the illustrative embodiments of the present application and the description thereof serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings: Figure 1 Fig. 1 shows a structural schematic diagram of a tower crane supporting structure according to an embodiment of the present application; and Figure 2A structural schematic diagram of a steel truss of the tower crane support structure according to the embodiment one of the present application is shown; Figure 3 An assembly diagram of the steel truss of the tower crane support structure according to the embodiment one of the present application and the first coupling beam, the third coupling beam is shown; Figure 4 An assembly diagram of the steel truss of the tower crane support structure according to the embodiment one of the present application and the second coupling beam, the fourth coupling beam is shown; Figure 5 A structural schematic diagram of the first embedded part of the tower crane support structure according to the embodiment one of the present application is shown.

[0018] Wherein, the above-mentioned drawings include the following reference signs: 10, shear wall; 20, concrete coupling beam; 21, first coupling beam; 22, second coupling beam; 23, third coupling beam; 24, fourth coupling beam; 30, steel truss; 31, upper flange steel beam; 32, lower flange steel beam; 33, straight web steel beam; 34, inclined web steel beam; 40, secondary beam; 51, first embedded part; 52, second embedded part; 61, first connecting plate; 62, second connecting plate; 63, first limiting frame; 64, second limiting frame; 70, pull rod. DETAILED DESCRIPTION

[0019] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0020] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0021] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the terms thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0022] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0023] As Figure 1 Embodiment one of the present application provides a tower crane support structure installed in the core tube of a building, the core tube comprising shear walls 10, the shear walls 10 having at least one pair of horizontally spaced concrete coupling beams 20, the tower crane support structure comprising steel trusses 30 and secondary beams 40, the steel trusses 30 being arranged on the concrete coupling beams 20 at both ends respectively, the steel trusses 30 being two, the two steel trusses 30 being arranged in parallel, the secondary beams 40 being arranged between the two steel trusses 30, and the two steel trusses 30 being connected through the secondary beams 40. The tower crane support structure of the present application changes the original fixed mode of reinforced concrete to the mode of using steel trusses 30, the steel trusses 30 having light self-weight and large span, which simplifies the installation and disassembly process while ensuring reliability, during installation, only the processed profiles need to be hoisted to the floor, and the installation of the steel trusses 30 is completed through assembly and welding, during disassembly, cutting and disassembly are performed according to hoisting calculation, and the profiles are hoisted out of the field, without damaging the concrete structure, which greatly simplifies the installation and disassembly steps, and the materials can be recycled to save energy and protect the environment, and the safety is higher.

[0024] It should be noted that, as Figure 1 shown, Figure 1 the shear wall 10 on the left side has at least one concrete coupling beam 20, Figure 1 the shear wall 10 on the right side also has at least one concrete coupling beam 20, the two concrete coupling beams 20 being the same in vertical direction, being arranged in parallel and being spaced apart in horizontal direction, and the steel trusses 30 being arranged on the two concrete coupling beams 20.

[0025] As Figure 2As shown, the steel truss 30 comprises an upper flange steel beam 31, a lower flange steel beam 32, a straight web steel beam 33 and an inclined web steel beam 34, the upper flange steel beam 31 is arranged above the lower flange steel beam 32, the straight web steel beam 33 is connected between the upper flange steel beam 31 and the lower flange steel beam 32, and the inclined web steel beam 34 is connected between the upper flange steel beam 31 and the lower flange steel beam 32. By arranging the upper flange steel beam 31 and the lower flange steel beam 32 and connecting them through the straight web steel beam 33 and the inclined web steel beam 34, the force system is simple, has strong bending resistance, large carrying capacity, can bear the great vertical load brought by the luffing tower crane, thereby improving safety and reliability. Preferably, the first end of the inclined web steel beam 34 is connected at the position where the straight web steel beam 33 and the upper flange steel beam 31 are connected, and the second end of the inclined web steel beam 34 is connected at the position where the adjacent straight web steel beam 33 and the lower flange steel beam 32 are connected, thereby improving the load performance.

[0026] In this embodiment, as shown in Figure 3 and Figure 4 , the concrete coupling beam 20 comprises a first coupling beam 21, a second coupling beam 22, a third coupling beam 23 and a fourth coupling beam 24, the first coupling beam 21 and the second coupling beam 22 are arranged oppositely, the first end of the upper flange steel beam 31 is arranged on the first coupling beam 21, and the second end of the upper flange steel beam 31 is arranged on the second coupling beam 22. The third coupling beam 23 is arranged below the first coupling beam 21, and the fourth coupling beam 24 is arranged below the second coupling beam 22, the first end of the lower flange steel beam 32 is arranged on the third coupling beam 23, and the second end of the lower flange steel beam 32 is arranged on the fourth coupling beam 24. In order to improve the load capacity of the steel truss 30, when pouring the concrete coupling beam 20, four concrete coupling beams 20, i.e. the first coupling beam 21, the second coupling beam 22, the third coupling beam 23 and the fourth coupling beam 24, need to be poured, the first coupling beam 21 and the second coupling beam 22 are arranged in parallel, the two ends of the upper flange steel beam 31 are connected on the first coupling beam 21 and the second coupling beam 22 respectively, the third coupling beam 23 is arranged below the first coupling beam 21, the fourth coupling beam 24 is arranged below the first coupling beam 21, and the two ends of the lower flange steel beam 32 are connected on the third coupling beam 23 and the fourth coupling beam 24 respectively. Through the steel truss 30 and the concrete coupling beam 20, the load can be evenly distributed on the four concrete coupling beams 20, thereby improving the load capacity.

[0027] Further, the tower crane support structure further comprises a first embedded part 51, a first connecting plate 61 and a second connecting plate 62, the first embedded part 51 is arranged on each of the concrete coupling beams 20; the first connecting plate 61 is arranged on the first embedded part 51 on the first coupling beam 21, and the first end of the upper flange steel beam 31 is connected to the first connecting plate 61; the second connecting plate 62 is arranged on the first embedded part 51 on the third coupling beam 23, and the first end of the lower flange steel beam 32 is connected to the second connecting plate 62. The first connecting plate 61 is welded to the first embedded part 51 of the first coupling beam 21, and the first end of the upper flange steel beam 31 is welded to the first connecting plate 61, so as to realize the connection and fixation of the upper flange steel beam 31 and the first coupling beam 21. The second connecting plate 62 is welded to the first embedded part 51 of the third coupling beam 23, and the first end of the lower flange steel beam 32 is welded to the second connecting plate 62, so as to realize the connection and fixation of the upper flange steel beam 31 and the first coupling beam 21. Preferably, the first connecting plate 61 and the second connecting plate 62 are both steel plates, Further, the tower crane support structure further comprises a first limiting frame 63 and a second limiting frame 64, the first limiting frame 63 is arranged on the first embedded part 51 of the second coupling beam 22, the second end of the upper flange steel beam 31 is limitedly matched with the first limiting frame 63, and the first limiting frame 63 is used for limiting the movement of the upper flange steel beam 31 in the vertical direction; the second limiting frame 64 is arranged on the first embedded part 51 of the fourth coupling beam 24, the second end of the lower flange steel beam 32 is limitedly matched with the second limiting frame 64, and the second limiting frame 64 is used for limiting the movement of the lower flange steel beam 32 in the vertical direction. A steel plate is welded to the first embedded part 51 on the second coupling beam 22, and a polytetrafluoroethylene plate is padded on the steel plate, the second end of the upper flange steel beam 31 is slidably arranged on the polytetrafluoroethylene plate, the first limiting frame 63 is two, the first limiting frame 63 is L-shaped, the two first limiting frames 63 are oppositely arranged and simultaneously welded to the first embedded part 51 on the second coupling beam 22, the two first limiting frames 63 and the first embedded part 51 form a clamping groove in the shape of an inverted T, and the second end of the upper flange steel beam 31 is movably arranged in the clamping groove. By using the characteristics of the polytetrafluoroethylene plate, the friction coefficient between the steel plates is reduced, and the first limiting frame 63 is used for limiting the movement of the second end of the upper flange steel beam 31 in the vertical direction. Since the upper flange steel beam 31 can move relative to the second coupling beam 22 in the length direction of the upper flange steel beam 31, the lateral force transmitted by the steel truss 30 to the concrete coupling beam 20 can be greatly eliminated.

[0028] Similarly, a steel plate is welded to the first embedded part 51 on the fourth coupling beam 24, a polytetrafluoroethylene plate is padded on the steel plate, the second end of the lower flange steel beam 32 is slidably arranged on the polytetrafluoroethylene plate, the number and installation mode of the second limiting frame 64 are the same as those of the first limiting frame 63, and the second end of the lower flange steel beam 32 is movably arranged in the clamping groove formed by the two second limiting frames 64 and the corresponding first embedded part 51. The lateral force transmitted by the steel truss 30 to the concrete coupling beam 20 can be greatly eliminated.

[0029] Further, the tower crane supporting structure further comprises a pull rod 70, the pull rod 70 is connected on the steel truss 30, and the steel truss 30 is connected with the shear wall 10 through the pull rod 70. It should be noted that the pull rod 70 is welded outside the steel truss 30, the pull rod 70 is connected with the shear wall 10, the horizontal force of the steel truss 30 is balanced, the material of the steel is Q355B, full-welded connection is adopted, and the welding mode is carbon dioxide gas shielded welding. In addition, in order to further improve the reliability, the pull rod 70 can also be connected with the concrete coupling beam 20. It should be noted that the second embedded part 52 is arranged in the shear wall 10, and the pull rod 70 is connected with the second embedded part 52.

[0030] It should be further noted that, as shown in Figure 5 The first embedded part 51 and the second embedded part 52 are both small-section I-shaped steel used as anchor rods, the requirements of the steel bars of the concrete beam are considered under the condition of meeting the force requirements of the truss, the whole embedded part is convenient for construction.

[0031] According to another aspect of the present application, a construction method for the above-mentioned tower crane supporting structure is also disclosed, comprising the following steps: S10: pouring the shear wall 10 and the concrete coupling beam 20 of the core tube, and embedding the embedded part in the shear wall 10 and the concrete coupling beam 20 before pouring; S20: installing two steel trusses 30 on the poured concrete coupling beam 20, and fixing the truss with the embedded part; S30: fixing the two steel trusses 30 through the secondary beam 40; S40: connecting the steel truss 30 on the connecting rod with the embedded part.

[0032] It should be noted that, for different site conditions, shear steel plates need to be additionally arranged in the core tube and the concrete beam, the shear wall 10 in the core tube is additionally reinforced, so as to improve the strength, ensure the safety and reliability. The main body structure concrete is reinforced before the steel truss 30 is installed, so as to ensure that the strength reaches 100%, the counterforce design value acting on the main body structure in the process of using the tower crane should not be greater than the counterforce limit value of the tower crane foundation support; after the construction is completed, the welding parts of the tower crane foundation are detected, and only when the detection is qualified, the tower crane can be used, and the stress and strain of the concrete coupling beam 20 and the steel truss 30 in the core tube are detected during the use of the tower crane, so as to ensure the safety in use.

[0033] From the above description, it can be seen that the above-mentioned embodiments of the present application are convenient to assemble and disassemble, can shorten the foundation construction period, the materials can be recycled, the safety is relatively high, and the utilization rate of the tower crane can be improved.

[0034] The foregoing is considered as illustrative only of the principles of the application. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the application to the exact construction and operation described. Accordingly, all such variations are intended to be included within the scope of the present application as defined in the claims. The application is also not limited to the details of the foregoing embodiment.

[0035] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "vertical", "horizontal", "top", "bottom", and derivatives thereof shall relate to the application as it is oriented in use. Therein, the term "horizontal" shall relate to a direction that is from left to right in the drawings, the term "vertical" shall relate to a direction that is from bottom to top in the drawings, and the term "diagonal" shall relate to a direction that is from lower left to upper right in the drawings. Where a term is provided in the singular tense, the inventors also contemplate aspects of the present application implemented using a plural tense unless otherwise specified.

[0036] In the description of the present application, it is to be understood that the specific locations of the components and the sequence of steps are set forth for the convenience of the reader and are not limiting on the scope of the application. Also, it is to be understood that the use of relational terms such as "front", "back", "left", "right", "up", "down", "vertical", "horizontal", and the like are used for convenience, and are in no way limiting on the scope of the application. The terms "front", "back", "left", "right", "up", "down", "vertical", "horizontal", and the like are intended to indicate relative positions for the components, and are not intended to denote absolute positions in space.

[0037] The above description is considered that of the preferred embodiments only. Modifications of the application will occur to those skilled in the art to which the present application pertains without departing from the spirit of the application. Therefore, it is understood that this application is not limited to the specific examples described herein, but only by the scope of the appended claims.

Claims

1. A construction method of a tower crane support structure, characterized by, The method comprises the following steps: S10: pouring the shear wall and the concrete coupling beam of the core tube, and embedding the embedded part in the shear wall and the concrete coupling beam before pouring; the shear wall has at least one pair of horizontally spaced concrete coupling beams; S20: installing two steel trusses on the poured concrete coupling beam, and fixedly connecting the steel trusses with the embedded part; the two steel trusses are arranged in parallel; the steel truss changes the fixed mode of the original reinforced concrete into the mode of using the steel truss; the steel truss comprises an upper flange steel beam, a lower flange steel beam, a straight web steel beam and an inclined web steel beam; the upper flange steel beam is arranged above the lower flange steel beam; the straight web steel beam is connected between the upper flange steel beam and the lower flange steel beam; the inclined web steel beam is connected between the upper flange steel beam and the lower flange steel beam; a first end of the inclined web steel beam is connected at a position where the straight web steel beam and the upper flange steel beam are connected; a second end of the inclined web steel beam is connected at a position where the adjacent straight web steel beam and the lower flange steel beam are connected; S30: fixing the two steel trusses through a secondary beam; the secondary beam is arranged between the two steel trusses, and the secondary beam does not have to damage the concrete structure when being connected between the two steel trusses; S40: connecting the steel truss with the embedded part through a connecting rod.

2. The construction method of a tower crane support structure according to claim 1, characterized in that, During installation, only the processed profile needs to be hoisted to the floor, and the installation of the steel truss and the secondary beam is completed through assembly and welding; during disassembly, cutting and disassembly are performed according to hoisting calculation, and the processed material can be recycled.

3. The construction method of a tower crane support structure according to claim 1, characterized in that, In the step S10, the pair of concrete coupling beams have the same height in the vertical direction, are arranged in parallel in the horizontal direction and are spaced apart; according to needs, a shear-resistant steel plate can be additionally arranged in the concrete coupling beam in the core tube, and the shear wall is reinforced.

4. The construction method of a tower crane support structure according to claim 3, characterized in that, In the step S20, the concrete coupling beam comprises a first coupling beam and a second coupling beam arranged opposite to and in parallel with each other; a first end of the upper flange steel beam is arranged on the first coupling beam, and a second end of the upper flange steel beam is arranged on the second coupling beam; the concrete coupling beam further comprises a third coupling beam and a fourth coupling beam arranged opposite to and in parallel with each other; the third coupling beam is located below the first coupling beam, and the fourth coupling beam is located below the second coupling beam; a first end of the lower flange steel beam is arranged on the third coupling beam, and a second end of the lower flange steel beam is arranged on the fourth coupling beam; the upper flange steel beam can move relative to the second coupling beam in the length direction of the upper flange steel beam.

5. The construction method of a tower crane support structure according to claim 4, characterized in that, In the step S20, the tower crane supporting structure further comprises: The first embedded part is arranged on each of the concrete coupling beams; The first connecting plate is arranged on the first embedded part of the first coupling beam, and the first end of the upper flange steel beam is connected to the first connecting plate; The second connecting plate is arranged on the first embedded part of the third coupling beam, and the first end of the lower flange steel beam is connected to the second connecting plate.

6. The construction method of a tower crane support structure according to claim 5, wherein In the step S20, the tower crane supporting structure further comprises: The first limiting frame is arranged on the first embedded part of the second coupling beam, and the second end of the upper flange steel beam is limitedly matched with the first limiting frame; the first limiting frame is used for limiting the movement of the upper flange steel beam in the vertical direction; The second limiting frame is arranged on the first embedded part of the fourth coupling beam, and the second end of the lower flange steel beam is limitedly matched with the second limiting frame; the second limiting frame is used for limiting the movement of the lower flange steel beam in the vertical direction.

7. The construction method of a tower crane support structure according to claim 6, characterized in that, In the step S20, a steel plate is welded on the first embedded part on the second cross beam, a polytetrafluoroethylene plate is padded on the steel plate, the second end of the upper flange steel beam is slidingly arranged on the polytetrafluoroethylene plate, the first limiting frame is two, the first limiting frame is L-shaped, the two first limiting frames are oppositely arranged and simultaneously welded on the first embedded part on the second cross beam, the two first limiting frames and the first embedded part enclose a clamping groove in the shape of an inverted T, and the second end of the upper flange steel beam is movably arranged in the clamping groove.

8. The construction method of a tower crane support structure according to claim 7, characterized in that, In the step S20, a steel plate is welded on the first embedded part on the fourth cross beam, a polytetrafluoroethylene plate is padded on the steel plate, the second end of the lower flange steel beam is slidingly arranged on the polytetrafluoroethylene plate, the number and mounting mode of the second limiting frame are the same as those of the first limiting frame, and the second end of the lower flange steel beam is movably arranged in the clamping groove enclosed by the two second limiting frames and the corresponding first embedded part.

9. The construction method of a tower crane support structure according to claim 5, characterized in that, Further comprising: S50: connecting the pull rod to the steel truss, and connecting the steel truss to the shear wall through the pull rod.

10. The construction method of a tower crane support structure according to claim 9, characterized in that, In the step S50, the tower crane support structure further comprises a second embedded part arranged in the shear wall, and the pull rod is connected to the second embedded part; the first embedded part and the second embedded part are both made of small-section I-shaped steel as anchor rods.

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