Construction method of complete equipment system for reverse construction of suspension structure

Abstract

The application provides a construction method of a complete equipment system of a suspension structure reverse construction, which utilizes a suspension structure roof overhanging steel truss to be modified into a construction platform, integrates a roof steel truss jacking structure, a core tube formwork, a suspension operation frame, an outer frame steel structure hoisting equipment, a tower crane, a concrete distributing machine and a construction elevator, and can solve the requirements of material stacking, formwork and operation platform setting during core tube construction. After the core tube construction is completed, the steel platform is jacked to a specified elevation of the roof steel truss, is connected with the core tube structure according to design requirements, the roof truss installation is completed, and the installation problem of the roof steel truss is solved. The frame construction problem is solved, and a frame beam pre-tensioning variable stiffness node is provided, which can reduce and control the structural deformation when the floor concrete is hoisted and poured layer by layer, and avoid the common quality defect of concrete structure cracking at the frame beam and core tube connecting node caused by the stress deformation of the structural beam.

Description

TECHNICAL FIELD

[0001] The present application relates to a construction method of a complete equipment system for reverse construction of a suspension structure. BACKGROUND

[0002] At present, for the super high building of concrete core tube plus outer frame steel structure, the construction technology is relatively mature, and generally, the steel platform formwork system is used to construct the core tube first, and the outer frame steel structure is hoisted and constructed following the core tube construction by several layers.

[0003] However, for the single body of concrete core tube plus roof overhanging steel truss plus suspension type outer frame steel structure, it cannot be constructed according to the conventional construction method. The outer frame of this structure is in a suspension type, and the cross section of the outer frame column decreases from top to bottom. The outer frame steel structure construction is carried out from top to bottom after the core tube is capped and the roof overhanging steel truss construction is completed. The roof overhanging steel truss transmits load through the pre-set support at the top of the core tube, and is arranged in a cantilevered manner covering the outer frame area, and cannot be constructed by scattered assembly and scattered loading, and must be lifted integrally. SUMMARY

[0004] The purpose of the present application is to provide a construction method of a complete equipment system for reverse construction of a suspension structure.

[0005] To solve the above problems, the present application provides a construction method of a complete equipment system for reverse construction of a suspension structure, comprising:

[0006] Step S1, after the underground structure is completed, the installation of the steel platform formwork system is started, the floor-mounted scaffold is erected to construct the core tube to the layer height, the roof steel truss jacking structure in the core tube is hoisted and installed by using the automobile crane or the tower crane, the roof overhanging hanging steel truss is assembled in low air on the roof steel truss jacking structure, the platform truss beam, the steel secondary beam, the tower crane, the material distributor, the construction elevator and the suspension operation frame are installed on the roof overhanging hanging steel truss, and the core tube steel formwork is connected to form the whole jacking type steel platform formwork system for core tube construction;

[0007] Step S2, the core tube material hoisting, the steel bar binding, the core tube formwork lifting and sealing and the concrete pouring processes of the N+1 layer above the layer height are carried out by using the steel platform formwork system, and the N+1 layer core tube construction is completed;

[0008] Step S3, the steel platform formwork system is jacked up by one layer, and the core tube material hoisting, the steel bar binding, the core tube formwork lifting and sealing and the concrete pouring processes of the N+3 layer are carried out, and the N+3 layer core tube construction is completed;

[0009] Step S4, step S3 is repeated until the core tube is capped;

[0010] Step S5, the steel platform formwork system is jacked up to the design elevation of the roof overhanging suspended steel truss, the steel truss is connected with the core tube top support according to the design requirements, the steel truss support system is converted from the roof steel truss jacking structure to the core tube top support, the core tube construction equipment of the steel platform top tower crane, distributor and suspended operation frame is removed, the platform truss beam and steel secondary beam added above the core tube projection are removed to form a hoisting hole, the roof steel truss jacking structure and the core tube steel formwork are removed by using the hoisting hole, and the construction of the roof overhanging suspended steel truss is completed;

[0011] Step S6, according to the plane arrangement of the outer frame steel column and steel beam, the number and position of the lifting points required by the roof overhanging suspended steel truss are calculated and determined, the outer frame steel structure hoisting equipment is installed at the lifting point position, the number of layers of the outer frame steel structure that can be lifted at one time is determined according to the lifting capacity of the hoisting equipment and the design bearing capacity of the outer frame column, the number of layers of the outer frame steel column and steel beam is calculated and determined by segmental or integral assembly on the ground, the outer frame steel frame is lifted by connecting the lifting points on the outer frame steel column using the outer frame steel structure hoisting equipment on the roof overhanging suspended steel truss, and the connection between the steel beam bracket and the upper layer steel column embedded in the core tube is completed, and the hoisting of the outer frame steel structure is completed in reverse order in layers;

[0012] Step S7, the frame main beam and the core tube structure are semi-rigidly connected by using a variable stiffness node device;

[0013] Step S8, a small roof crane is installed on the roof overhanging suspended steel truss to hoist the outer frame floor from top to bottom, the outer frame floor slab is manually laid and the steel reinforcement is bound; the floor concrete is poured layer by layer from top to bottom by using a fixed pump;

[0014] Step S9, the floor concrete is poured layer by layer from top to bottom by using a fixed pump through the concrete pump pipe arranged in the core tube, before pouring the Nth floor structure concrete, a steel mesh sheet is erected along the frame main beam direction at the frame main beam and core tube connection node position, and a post-pouring strip with a length of not less than 500 mm is set and the concrete is not poured;

[0015] Step S10, after the floor structure concrete is completely poured, according to the structure deformation monitoring situation, after the vertical displacement of each floor structure is stable, the flange connecting piece connecting the frame main beam and the core tube is added layer by layer from bottom to top, the semi-rigid connection between the frame main beam and the core tube structure is enhanced to rigid connection, and the concrete in the post-pouring strip area is poured.

[0016] Further, in the above method, step S1 comprises:

[0017] After the core tube construction reaches the 3rd floor level, the scaffold is removed to the 2nd floor level, the remaining scaffold is used as an operation platform, the steel platform jacking structure is installed first; then the core tube inner and outer hanging operation frame and the core tube formwork are installed, the core tube formwork is temporarily fixed with the core tube shear wall between the 2nd and 3rd floor levels;

[0018] Then the platform truss beam and the steel secondary beam are installed, and the core tube formwork, the core tube inner and outer hanging operation frame are connected with the platform truss beam or the steel secondary beam;

[0019] Finally, the tower crane, the construction elevator and the material distribution machine are installed according to the construction requirements.

[0020] Further, in the above method, step S2 comprises:

[0021] After the installation of the overall jacking type steel platform formwork system is completed, the roof steel truss jacking structure is used to jacking one layer of height to the N+2 layer, the N+2 layer core tube shear wall reinforcement is bound and constructed; after the reinforcement binding is completed, the core tube formwork is lifted one layer to N+2, the core tube formwork sealing construction is carried out; the core tube concrete pouring construction is carried out by using the arranged guide.

[0022] Further, in the above method, step S3 comprises:

[0023] The jacking type steel platform formwork system uses the roof steel truss jacking structure to jacking 1 layer to N+3 layer, and the N+2 layer shear wall reinforcement is bound;

[0024] The core tube formwork is lifted to N+2 layer for sealing;

[0025] The N+2 layer shear wall concrete is poured, and the N+2 layer core tube construction is completed;

[0026] The jacking structure support position is lifted from N layer to N+1 layer.

[0027] Further, in the above method, step S5 comprises:

[0028] The steel platform is jacked to the roof overhanging hanging steel truss design elevation, the steel platform truss is connected with the core tube top formwork embedded support according to the design requirements, the steel platform support system is converted from the roof steel truss jacking structure to the core tube top permanent support, the core tube construction equipment of the steel platform top tower crane, material distribution machine and hanging operation frame is removed, the platform truss beam and the steel secondary beam above the core tube are removed to form a hoisting hole, the steel platform jacking structure and the core tube formwork are removed by using the hoisting hole, and the installation and construction of the roof steel truss are completed;

[0029] The construction machine tools of the construction hoist, the distributor and the tower crane are removed in advance, and then the components of the truss beam and the steel secondary beam newly added in the projection range of the original roof steel truss core tube are removed, so as to form a hoisting hole above the core tube;

[0030] The roof steel truss jacking structure and the core tube formwork are removed by using the hoisting hole, and the conversion from the steel platform to the roof overhanging hanging steel truss is completed.

[0031] Further, in the above method, step S6 comprises:

[0032] After the roof overhanging hanging steel truss construction is completed, the overall hoisting construction of the outer frame steel column and the steel beam is carried out by using the external frame steel structure hoisting equipment arranged on the steel truss and the steel column, the steel beam and the hoisting point determined by calculation; the hoisting construction is carried out layer by layer from top to bottom, the top layer steel column and the steel beam are assembled and constructed at the projection position of the outer frame of the basement roof, and the hoisting and lifting construction is carried out by using the external frame steel structure hoisting equipment; if the weight of the steel structure of several layers is within the bearing range of the hoisting equipment, the overall hoisting and lifting can be carried out for multiple layers; one hoisting point is arranged on each side of the steel column corresponding to the roof overhanging hanging steel truss, and the hoisting lug plate is arranged on the two sides of the steel column in advance, and the hoisting and lifting construction of the steel column is carried out by using the lug plate; one hoisting point is arranged on each side of the position corresponding to the roof overhanging hanging steel truss at the connecting point of the outer frame steel beam and the core tube wall, and the hoisting lug plate is arranged on the two sides of the end of the steel beam in advance, and the hoisting and lifting construction of the steel beam is carried out by using the lug plate.

[0033] Further, in the above method, step S8 comprises:

[0034] A small roof crane is arranged on the roof overhanging hanging steel truss, and the hoisting and reinforcement binding construction of the outer frame floor is carried out from top to bottom, and the floor concrete is poured layer by layer from top to bottom by using the fixed pump; before pouring the Nth floor structure concrete, the steel mesh sheet is erected along the frame main beam direction at the connecting node position of the frame main beam and the core tube, and the post-pouring belt is arranged without pouring concrete.

[0035] Further, in the above method, step S10 comprises:

[0036] After the floor structure concrete is completely poured, according to the structure deformation monitoring situation, after the vertical displacement of each floor structure is stable, the L-shaped connecting piece connecting the frame main beam and the core tube is added layer by layer from bottom to top, the semi-rigid connection between the outer frame steel beam and the core tube is enhanced to rigid connection, and the concrete in the post-pouring belt area is poured.

[0037] Compared with the prior art, the application provides a suspension structure reverse construction complete equipment system and a construction method, which utilizes a suspension structure roof overhanging steel truss 1 to be modified into a construction platform, integrates a roof steel truss jacking structure 6, a core tube formwork 7, a suspension operation frame 8, an outer frame steel structure hoisting device 9, a tower crane 10, a concrete distributing machine 11, a construction elevator 12 and the like to form a suspension structure overall jacking type steel platform formwork system equipment system, and utilizes the suspension structure overall jacking type steel platform formwork system equipment system to first construct the core tube 2, and then utilizes the steel platform to jacking the suspension structure reverse construction outer frame steel column 3 and the steel beam 4. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a suspension structure schematic diagram of an example of the application;

[0039] Figure 2 is a steel platform plane layout of an example of the application;

[0040] Figure 3 is a steel platform section layout diagram of an example of the present application;

[0041] Figure 4-1 , 4-2 is a steel platform installation process schematic diagram of an example of the present application;

[0042] Figure 5-1 , 5-2 , 5-3, 5-4, 5-5 are core tube construction process of an example of the present application;

[0043] Figure 6-1 , 6-2 , 6-3 is a steel platform demolition schematic diagram (steel truss demolition reserved hole) of an example of the present application;

[0044] Figure 7 is an outer frame lifting schematic diagram of an example of the present application;

[0045] Figure 8 is an outer frame lifting schematic diagram of an example of the present application;

[0046] Figure 9 is a semi-rigid node design schematic diagram proposed by the present application;

[0047] Figure 10 is an outer frame structure construction schematic diagram of an example of the present application;

[0048] Figure 11 is a semi-rigid node design schematic diagram proposed by the present application. DETAILED DESCRIPTION

[0049] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0050] As shown in Figures 1 to 11 , the present application provides a construction method of a reverse construction complete equipment system of a suspension structure, comprising:

[0051] Step S1, after the underground structure is completed, the installation of the steel platform formwork system is started, the landing scaffold is erected, the core tube 2 is constructed to the 3-layer elevation height, the roof steel truss jacking structure 6 in the core tube is hoisted by using the automobile crane or the tower crane, and the roof cantilever hanging steel truss 1 is assembled in low altitude on the roof steel truss jacking structure 6, the platform truss beam 13, the steel secondary beam 14, the tower crane 10, the material distributor 11, the construction elevator 12 and the suspension operation frame 8 are installed on the roof cantilever hanging steel truss, and the core tube steel formwork 7 is connected to form a whole jacking type steel platform formwork system for core tube construction;

[0052] Specifically, as Figure 4-1As shown, after the core tube is constructed to the 3rd floor level, the scaffold 15 is removed to the 2nd floor level, the remaining scaffold is used as an operation platform, and the steel platform jacking structure 6 is installed first; then the installation of the core tube inner and outer hanging operation frame 8 and the core tube formwork 7 is carried out, and the core tube formwork 7 is temporarily fixed with the core tube shear wall between the 2nd floor level and the 3rd floor level;

[0053] Then, as shown in Figure 4-2 , the platform truss beam 13 and the steel secondary beam 14 are installed, and the core tube formwork 7 and the core tube inner and outer hanging operation frame 8 are connected with the platform truss beam 13 or the steel secondary beam 14;

[0054] Finally, according to the construction needs, the installation of the tower crane 10, the construction elevator 12, the distributing machine 11 and other construction tools and auxiliary facilities is carried out.

[0055] Step S2, using the steel platform formwork system, the N+1th floor (the first floor) core tube material hoisting, steel bar binding and core tube formwork lifting, sealing and concrete pouring procedures above the 3rd floor level are carried out, and the N+1th floor core tube construction is completed;

[0056] Specifically, as shown in Figure 5-1 , after the installation of the overall jacking type steel platform formwork system is completed, the jacking structure 6 is jacked by one floor height to the N+2th floor, and the N+2th floor core tube shear wall steel bar 16 binding construction is carried out; after the steel bar binding is completed, the core tube formwork 7 is lifted by one floor to the N+2th floor, and the core tube formwork 7 sealing construction is carried out; the core tube 2 concrete pouring construction is carried out by using the arranged trowel;

[0057] Step S3, the steel platform formwork system is jacked by one floor, and the N+3th floor core tube material hoisting, steel bar binding, core tube formwork lifting, sealing and concrete pouring procedures are carried out, and the N+3th floor core tube construction is completed;

[0058] Specifically, as shown in Figure 5-2 , the jacking type steel platform formwork system is jacked by one floor to the N+3th floor by using the jacking structure 6, and the N+2th floor shear wall steel bar 16 binding is carried out;

[0059] Then, as shown in Figure 5-3 , the core tube formwork 7 is lifted to the N+2th floor for sealing;

[0060] Then, as shown in Figure 5-4 , the N+2th floor shear wall concrete is poured, and the N+2th floor core tube construction is completed;

[0061] Then, as shown in Figure 5-5 , the jacking structure 6 support position is lifted from the Nth floor to the N+1th floor.

[0062] Step S4, repeat step S3 until the core tube is capped.

[0063] Step S5, the steel platform jacking frame system is jacked to the design elevation of the roof overhanging suspended steel truss, the steel truss is connected with the core tube top support 16 according to the design requirement, the steel truss support system is converted from the roof steel truss jacking structure 6 to the core tube top support 16, the core tube construction equipment of the steel platform top tower crane, distributor and suspended operation frame is removed, the platform truss beam 13 and the steel secondary beam 14 added above the core tube projection are removed to form a hoisting hole, the roof steel truss jacking structure 6 and the core tube steel formwork 7 are removed by using the hoisting hole, and the construction of the roof overhanging suspended steel truss 1 is completed;

[0064] Specifically, as shown in Figure 6-1 , the steel platform is jacked to the design elevation of the roof overhanging suspended steel truss, the steel platform truss is connected with the core tube top form embedded support according to the design requirement, the steel platform support system is converted from the jacking structure 6 to the core tube top permanent support 16, the core tube construction equipment of the steel platform top tower crane 10, distributor 11, suspended operation frame 8, etc. is removed, the platform truss beam 13 and the steel secondary beam 14 above the core tube are removed to form a hoisting hole, the steel platform jacking structure 6 and the core tube formwork 7 are removed by using the hoisting hole, and the installation construction of the roof steel truss is completed;

[0065] As shown in Figure 6-2 , the construction hoist 12, distributor 11 and tower crane 10 are removed first, then the truss beam 13 and steel secondary beam 14 added in the core tube projection range of the original roof steel truss are removed, and a hoisting hole is formed above the core tube, as shown in Figure 6-3 ;

[0066] The vertical jacking structure 6 and the core tube formwork 7 are removed by using the hoisting hole, and the conversion of the steel platform to the roof overhanging suspended steel truss 1 is completed.

[0067] Step S6, according to the plane arrangement of the outer frame steel column 3 and the steel beam 4, the number and position of the lifting points required by the roof overhanging suspended steel truss are calculated and determined, the outer frame steel structure lifting equipment 9 is installed at the lifting point position, the number of layers of the outer frame steel structure that can be lifted at one time is calculated and determined according to the lifting capacity of the lifting equipment and the design bearing capacity of the outer frame column, the outer frame steel column 3 and the steel beam 4 of the calculated layer number are assembled on the ground in sections or as a whole, the outer frame steel frame (outer frame steel column, steel beam) is lifted by connecting the lifting points on the outer frame steel column with the outer frame steel structure lifting equipment 9 on the roof overhanging suspended steel truss 1, and the connection between the steel beam bracket 21 embedded in the core tube and the upper layer steel column is completed, and the lifting of the outer frame steel structure is completed in reverse order in sections.

[0068] Specifically, as shown in Figure 7As shown, after the completion of the roof overhanging hanging steel truss 1 construction, the use of steel truss set by the outer frame steel structure hoisting equipment 9, using the calculation of the steel column 3, steel beam 4 hoisting point 17 for the overall hoisting construction of the outer frame steel column 3, steel beam 4; as Figure 8 As shown by the top-down layer by layer hoisting construction, first in the basement roof frame projection position on the top layer of steel column 3, steel beam 4 assembly construction, using the outer frame steel structure hoisting equipment 9 whole layer hoisting construction; if the weight of several layers of steel structure in the hoisting equipment within the carrying range, can be continuous multi-layer overall hoisting; in the roof overhanging hanging steel truss 1 corresponding to each side of the steel column 3 is arranged 1 hoisting point, in the two sides of the steel column 3 pre-set hoisting lug, using lug hoisting construction of steel column; in the outer frame steel beam 4 and core tube wall connection point corresponding to the position of the roof overhanging hanging steel truss 1 both sides, each arranged 1 hoisting point, in the two sides of the steel beam 4 end pre-set hoisting lug, using lug hoisting construction of steel beam 4;

[0069] Step S7, the frame girder and the core tube structure are connected by the variable stiffness node device;

[0070] Specifically, as shown Figure 9 The semi-rigid connection node should ensure that the frame girder and the core tube connection node have certain rotational deformation capacity to digest the bending deformation and adverse secondary stress generated by the increase of the structure dead weight after the subsequent layer-by-layer pouring of concrete. The rotational stiffness adjustment can be achieved by changing the connection bolt hole position or increasing or decreasing the number of connection bolts and adjusting the connection bolt pretightening force;

[0071] Step S8, as shown Figure 10 The small roof crane 17 is installed on the roof overhanging hanging steel truss 1 to hoist the outer frame floor 18 from top to bottom, the outer frame floor is manually paved and the reinforcement is bound; the fixed pump is used to pour the floor concrete layer by layer from top to bottom;

[0072] Specifically, as shown Figure 10 The small roof crane 17 is installed on the roof overhanging hanging steel truss 1 to hoist the outer frame floor 18 from top to bottom, the outer frame floor is manually paved and the reinforcement is bound; the fixed pump is used to pour the floor concrete layer by layer from top to bottom;

[0073] Step S9, the fixed pump is used to pour the floor concrete layer by layer from top to bottom by using the concrete pump pipe set in the core tube; before pouring the Nth floor structure concrete, steel mesh is erected along the frame girder direction at the frame girder and core tube connection node position, and a post-pouring strip not less than 500mm is set to temporarily not pour concrete;

[0074] Step S10, after the floor structure concrete is completely poured, according to the structure deformation monitoring condition, after the vertical displacement of each floor structure is stable (the daily deformation increment tends to 0), the flange connecting piece connecting the frame main beam and the core tube is added layer by layer from bottom to top, the semi-rigid connection of the frame main beam and the core tube structure is enhanced to rigid connection, and then the concrete in the post-pouring belt area is poured.

[0075] Specifically, after the floor structure concrete is completely poured, according to the structure deformation monitoring condition, after the vertical displacement of each floor structure is stable (the daily deformation increment tends to 0), the L-shaped connecting piece 20 (such as shown in the figure) connecting the frame main beam 4 and the core tube 2 is added layer by layer from bottom to top, the semi-rigid connection of the outer frame steel beam 4 and the core tube 2 is enhanced to rigid connection, and then the concrete in the post-pouring belt area is poured. Figure 11

[0076] In an embodiment of the construction method of the complete equipment system of the reverse construction of the suspension structure, step S1 comprises:

[0077] After the underground structure is completed, the installation of the integral jacking type steel platform formwork system is started, after the basement is out of ±0.00, the temporary floor-mounted scaffold is erected on both sides of the core tube wall, the upper core tube construction is carried out to the 3rd floor level, and the installation height space of the jacking structure of the integral jacking type steel platform formwork system is ensured;

[0078] In the core tube, the horizontal floor beam plate is made after the coupling beam, and the steel bar connection between the horizontal floor beam plate and the core tube wall is realized by the way of post-planting steel bar;

[0079] After the core tube construction is carried out to the 3rd floor level, the core tube inner scaffold is removed to the installation bottom level position of the steel platform jacking structure, which is used as the vertical support during the installation of the steel platform and the temporary operation platform for the installation of the core tube suspension operation frame;

[0080] The core tube outer scaffold is removed to the 2nd floor level position, which is used as the temporary operation platform for the installation of the core tube outer suspension operation frame;

[0081] The core tube wall formwork is installed to the wall in the range from the 2nd floor to the 3rd floor level, and is temporarily fixed; the automobile crane is used to hoist and install the steel truss of the steel platform, the steel platform truss beam 13 is connected with the jacking structure 6, and the core tube formwork is fixed to the bottom of the steel platform truss layer;

[0082] Finally, the installation of the auxiliary facilities such as the personnel and cargo elevator, the tower crane and the material distributor is carried out, the installation construction of the integral jacking type steel platform formwork system of the core tube construction is completed, the steel platform is modified from the roof overhanging hanging steel truss, the roof overhanging hanging steel truss is in the projection range of the core tube, the platform truss beam 13 and the steel secondary beam 14 are additionally arranged, and are connected with the roof overhanging hanging steel truss to form an integral whole.

[0083] ​In the embodiment of the construction method of the reverse construction complete equipment system of the suspension structure of the application, step S5, the steel truss support system is converted from the roof steel truss jacking structure 6 into the core tube top support 16, comprising:

[0084] After the core tube construction reaches the top design elevation, the pre-burying and installation of the roof overhanging hanging steel truss support are performed according to the design requirements, the steel platform elevation is fine-tuned through the steel platform jacking structure, the steel platform is seated on the core tube top support 16, and the steel platform support system is converted from the roof steel truss jacking structure 6 into the core tube top support 16.

[0085] In the embodiment of the construction method of the reverse construction complete equipment system of the suspension structure of the application, after the steel platform support system is converted from the roof steel truss jacking structure 6 into the core tube top support 16, the method further comprises:

[0086] Then, the steel platform construction equipment is removed. According to the reverse sequence of the installation, the auxiliary construction equipment of the tower crane, the distributing machine and the personnel and goods elevator is removed first;

[0087] Then, the steel platform added truss beam 13 and the steel secondary beam 14 are removed to form a hoisting hole, then the suspension operation frame and the core tube formwork are removed, and finally the steel platform jacking structure is removed. At this time, the overall jacking type steel platform formwork system is converted into the designed roof overhanging hanging steel truss.

[0088] In the embodiment of the construction method of the reverse construction complete equipment system of the suspension structure of the application, step S6, comprising:

[0089] According to the calculation of the bearing capacity of the external frame steel structure hoisting equipment and the external frame column, the number of layers of the external frame steel structure that can be lifted at one time is determined, the external frame steel structure including steel columns, steel main beams and steel secondary beams is assembled in sections or as a whole at the ground projection position of the steel columns and the steel main beams, and the ear plates are arranged on both sides of the steel columns and the steel main beams as lifting points, two lifting points are arranged on both sides of the steel columns and the steel main beams corresponding to the roof steel truss points according to the plane arrangement of the external frame steel structure, and the hoisting equipment is installed;

[0090] After the number of layers of the external frame steel structure that can be lifted at one time is determined, the corresponding number of layers of the structure is assembled, the whole is lifted to the design elevation by using the hoisting equipment, then the connection between the steel columns and the upper steel columns is constructed, the pre-tensioning variable stiffness node device 5 is arranged at the core tube and the steel main beam connection pre-burying part, the steel main beam is connected with the pre-tensioning variable stiffness node device, after the bolt connection or the welding at the connection node position is completed, the hook is loosened for the subsequent floor assembly and hoisting construction, and the process is repeated until the external frame steel structure construction of all floors is completed, and the external frame steel structure hoisting equipment is removed.

[0091] If the roof steel truss is transformed into the integral lifting type steel platform formwork system equipment system, the roof steel truss can be used for core tube construction, and the problem of integral lifting of the roof steel truss is solved. Further, the roof steel truss can be used as a force body to perform the top-down hoisting construction of the outer frame steel structure.

[0092] In the embodiment of the construction method of the reverse construction complete equipment system of the suspension structure, step S7 comprises:

[0093] The rotational stiffness of the semi-rigid joint of the frame main beam and the core tube structure is determined according to the minimum deformation stress of the frame main beam structure deformation under the dead load of the final state of the overall structure, and should meet the floor structure vertical deformation limit value required by the design specification.

[0094] The roof cantilever steel truss is transformed into the integral lifting type steel platform formwork system, the problems of material stacking, construction equipment arrangement, vertical formwork of shear walls and operation platform during the construction of the upper core tube are solved. Through the steel platform lifting system, the lifting installation problem of the roof steel truss is solved. By using the roof steel truss as a force carrier and setting temporary lifting equipment, the installation problem of the outer frame steel structure is solved. The roof crane is set on the roof to solve the hoisting and paving of the outer frame floor slab. The temporary pump pipe arranged in the core tube is used to solve the problem of pouring of the outer frame concrete. By using the semi-rigid joint of the frame main beam and the core tube structure and setting post-poured concrete, the problem of structure deformation at the connection between the suspension structure floor structure and the core tube structure during the construction stage is solved. The reverse construction complete equipment system and the construction method of the suspension structure realize the construction of the upper core tube, solve the lifting installation of the roof steel truss, realize the reverse construction of the outer frame steel structure, and meet the requirements of node design strength, stiffness and integrity.

[0095] Specifically, as shown in Figure 1 The suspension structure according to the present application is composed of a reinforced concrete core tube 2, a roof cantilever hanging steel truss 1, and a cantilever outer frame steel column 3 and steel beam 4. The outer frame column 3 is connected with the roof cantilever segment 1 of the steel truss, and the load of the outer frame 3 and 4 is transmitted to the roof cantilever hanging steel truss 1 and then to the reinforced concrete core tube 2.

[0096] As shown in Figure 2 and 3As shown, the present application provides a construction method of a suspension structure reverse construction complete equipment system, the roof overhanging hanging steel truss 1 is modified into an integral jacking type steel platform formwork system equipment system, within the projection range of the roof overhanging hanging steel truss core tube, platform truss beam 13 and steel secondary beam 14 are additionally arranged, are connected with the roof overhanging hanging steel truss 1 to form an integral whole, form a core tube formwork construction system with the jacking structure 6, the suspension operation frame 8 and the core tube formwork 7, and the like, and the tower crane 10, the distributing machine 11, the construction hoist 12 and the like are arranged on the steel platform to form the integral jacking type steel platform formwork system equipment system of the suspension structure reverse construction.

[0097] The present application is directed to the monomer of concrete core tube + roof overhanging steel truss + inverted hanging type outer frame steel structure, the roof overhanging steel truss is combined with the integral jacking type steel platform formwork system, the roof overhanging truss is connected with the steel platform jacking structure by setting the truss beam and the steel secondary beam, the roof overhanging steel truss is modified into the integral jacking type steel platform formwork system, and the problem of the core tube upper construction operation platform and formwork system is solved.

[0098] The present application sets up the hoisting equipment of the outer frame steel structure on the roof overhanging steel truss, determines the hoisting point through calculation, takes the single-layer steel structure as a unit, adopts the reverse hoisting mode, and realizes the hoisting problem of the inverted hanging type outer frame steel structure from top to bottom.

[0099] The present application designs to utilize the semi-rigid joint of the frame main beam and the core tube structure and set the post-poured concrete after pouring, solves the problem that the connection place of the suspension structure floor structure and the core tube structure is prone to structural deformation to cause the cracking of the floor concrete structure at the joint during the construction stage.

[0100] In summary, the present application proposes a kind of suspension structure reverse construction complete equipment system and construction method, it utilizes the roof overhanging steel truss 1 of suspension structure roof overhanging and hangs, is retrofitted into construction platform, integrates roof steel truss jacking structure 6, core tube template 7, suspension operation frame 8, outer frame steel structure hoisting equipment 9, tower crane 10, concrete distributor 11, construction elevator 12 and so on Equipment constitutes the overall jacking steel platform formwork system equipment system of suspension structure, utilizes the overall jacking steel platform formwork system equipment system of suspension structure, first constructs core tube 2 again, utilizes steel platform to promote the construction method of suspension structure reverse construction outer frame steel column 3, steel beam 4 of outer frame steel structure.The present application is directed to the structure form of general suspension structure concrete core tube + roof overhanging steel truss + suspension type steel structure outer frame, proposes the overall jacking steel platform formwork system equipment system of roof overhanging steel truss transformation, completes the overall jacking steel platform formwork system equipment system in low air assembly, first utilizes the overall jacking steel platform formwork system equipment system to carry out core tube construction, solves the requirement of material stacking, formwork, operation platform setting during core tube construction.Core tube construction is completed, and steel platform is jacked to the specified elevation of roof steel truss, is connected with core tube structure according to design requirement, completes roof truss installation, solves the installation problem of roof steel truss.Setting up outer frame steel structure hoisting equipment on roof steel truss, the structure of outer frame steel column 3, beam 4 is assembled in layers on ground, and outer frame steel structure is lifted from top to bottom in reverse order using outer frame steel structure hoisting equipment and is connected according to design requirement, finally hoists outer frame floor slab and pours floor concrete, completes overall outer frame construction, solves the problem of outer frame construction, and proposes a frame beam pre-tensioning variable stiffness node 5, which can reduce and control the structural deformation when hoisting and pouring floor concrete layer by layer, avoid the common quality defect of concrete structure cracking at the connection node of frame beam and core tube due to structural beam deformation.The construction equipment system and construction method proposed in the present application utilize the roof overhanging steel truss of main structure to build construction steel platform equipment system, and construct outer frame structure according to the final design stress state of outer frame column tension, without setting up temporary support frame and without reinforcing outer frame column section during outer frame construction, without changing the stress system from construction state to design state, fully exert the superiority of suspension structure outer frame column tension stress system, greatly reduce the construction temporary measures and improve the construction efficiency, and propose a frame beam pre-tensioning variable stiffness node, which can avoid the common quality defect of concrete structure cracking at the connection node of frame beam and core tube due to structural beam deformation.

[0101] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments.

[0102] It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims

1. A construction method of a complete equipment system for reverse construction of a suspension structure, characterized in that, Comprise: Step S1, after the completion of the underground structure, the installation of the steel platform formwork system is started, the core tube is constructed to the layer elevation height by setting up the floor-mounted scaffold, the roof steel truss jacking structure in the core tube is hoisted by using the automobile hoist or the tower crane, the roof overhanging hanging steel truss is assembled in low altitude on the roof steel truss jacking structure, the platform truss beam, the steel secondary beam, the tower crane, the distributor, the construction elevator and the suspended operating frame are installed on the roof overhanging hanging steel truss, and the core tube steel formwork is connected to form the whole jacking type steel platform formwork system of the core tube construction; Step S2, using the steel platform formwork system, the N+1 layer core tube material hoisting, the steel bar binding and the core tube formwork lifting and sealing and the concrete pouring process above the 3 layer elevation height are carried out, and the N+1 layer core tube construction is completed; Step S3, the steel platform formwork system is jacked up layer by layer, the N+3 layer core tube material hoisting, the steel bar binding, the core tube formwork lifting and sealing and the concrete pouring process are carried out, and the N+3 layer core tube construction is completed; Step S4, repeat step S3 until the core tube is capped; Step S5, the steel platform formwork system is jacked up to the roof overhanging hanging steel truss design elevation, the steel truss is connected with the core tube top support according to the design requirements, the steel truss support system is converted from the roof steel truss jacking structure to the core tube top support, the core tube construction equipment of the tower crane, the distributor and the suspended operating frame on the top surface of the steel platform is removed, the platform truss beam and the steel secondary beam formed by the hoisting hole are removed, the roof steel truss jacking structure and the core tube steel formwork are removed by using the hoisting hole, and the construction of the roof overhanging hanging steel truss is completed; Step S6, according to the plane arrangement of the outer frame steel column and the outer frame steel beam, the number and position of the lifting points required by the roof overhanging hanging steel truss are calculated and determined, the outer frame steel structure lifting equipment is installed at the lifting point position, the number of layers of the outer frame steel structure composed of the outer frame steel column and the outer frame steel beam that can be lifted at one time is determined according to the lifting capacity of the lifting equipment and the design bearing capacity of the outer frame steel column, the outer frame steel structure with the determined number of layers is assembled in sections or as a whole on the ground, the outer frame steel structure is lifted by connecting the lifting points on the outer frame steel column using the outer frame steel structure lifting equipment on the roof overhanging hanging steel truss, and the connection with the steel beam bracket and the steel column embedded in the core tube and the upper layer steel column is completed, and the hoisting of the outer frame steel structure is completed in reverse order in sections; Step S7, the outer frame steel beam and the core tube structure are semi-rigidly connected by using the variable stiffness node device; Step S8, a small roof crane is installed on the roof overhanging hanging steel truss to hoist the outer frame floor slab from top to bottom, the outer frame floor slab is manually paved on each layer of the outer frame steel structure, and the steel bar binding is completed; the floor concrete is poured layer by layer from top to bottom by using the fixed pump; Step S9, the floor concrete is poured layer by layer from top to bottom by using the fixed pump through the concrete pump pipe arranged in the core tube, before pouring the N layer floor structure concrete, a steel mesh sheet is arranged at the outer frame steel beam and the core tube connection node position along the outer frame steel beam direction, and a post-poured strip with a length of not less than 500 mm is not poured with concrete; Step S10, after the floor structure concrete is completely poured, according to the structural deformation monitoring, after the vertical displacement of each floor structure is stable, the flange connecting piece connecting the outer frame steel beam and the core tube is added layer by layer from bottom to top, the semi-rigid connection of the outer frame steel beam and the core tube structure is enhanced to rigid connection, and then the concrete in the post-pouring belt area is poured.

2. The construction method of the reverse construction complete equipment system of the suspension structure according to claim 1, characterized in that, Step S1, comprising: After the core tube is constructed to the 3rd floor level, the scaffold is removed to the 2nd floor level, the remaining scaffold is used as an operation platform, the steel platform jacking structure is installed first; then the core tube inner and outer hanging operation frame and the core tube formwork are installed, the core tube formwork is temporarily fixed with the core tube shear wall between the 2nd floor level and the 3rd floor level; Then the platform truss beam and the steel secondary beam are installed, and the core tube formwork, the core tube inner and outer hanging operation frame and the platform truss beam or the steel secondary beam are connected; Finally, the tower crane, the construction elevator and the material distributor are installed according to the construction needs.

3. The construction method of the reverse construction complete equipment system of the suspension structure according to claim 1, characterized in that, Step S2, comprising: After the integral jacking type steel platform formwork system is installed, the roof steel truss jacking structure is jacked by one floor height to the N+2th floor, the N+2th floor core tube shear wall reinforcement is bound and constructed; after the reinforcement is bound, the core tube formwork is lifted by one floor to the N+2th floor, the core tube formwork is constructed; the core tube concrete is poured by using the arranged guide.

4. The construction method of the reverse construction complete equipment system of the suspension structure according to claim 1, characterized in that, Step S3, comprising: The jacking type steel platform formwork system is jacked by one floor to the N+3th floor by using the roof steel truss jacking structure, the N+2th floor shear wall reinforcement is bound; The core tube formwork is lifted to the N+2th floor for sealing; The N+2th floor shear wall concrete is poured, and the N+2th floor core tube construction is completed; The jacking structure support position is lifted from the Nth floor to the N+1th floor.

5. The construction method of the reverse construction complete equipment system of the suspension structure according to claim 1, characterized in that, Step S5, comprising: The steel platform is jacked to the roof overhanging hanging steel truss design elevation, the steel platform truss is connected with the core tube top formwork embedded support according to the design requirements, the steel platform support system is converted from the roof steel truss jacking structure to the core tube top permanent support, the core tube construction equipment of the steel platform top tower crane, material distributor and hanging operation frame is removed, the platform truss beam and the steel secondary beam above the core tube are removed to form a hoisting hole, the steel platform jacking structure and the core tube formwork are removed by using the hoisting hole, and the installation construction of the roof steel truss is completed; The construction tools of the construction elevator, the material distributor and the tower crane are removed first, then the components of the truss beam and the steel secondary beam newly added in the core tube projection range of the original roof steel truss are removed, and the hoisting hole is formed above the core tube; The roof steel truss jacking structure and the core tube formwork are removed by using the hoisting hole, and the conversion of the steel platform to the roof overhanging hanging steel truss is completed.

6. The construction method of the reverse construction complete equipment system of the suspension structure according to claim 1, characterized in that, Step S6, comprising: After the construction of the roof overhanging hanging steel truss is completed, the overall hoisting construction of the outer frame steel column and the outer frame steel beam is carried out by using the outer frame steel structure hoisting equipment arranged on the steel truss, the outer frame steel column, the outer frame steel beam and the hoisting point determined by calculation; the hoisting construction is carried out layer by layer from top to bottom, the assembly construction of the top layer of the outer frame steel column and the outer frame steel beam is carried out at the outer frame projection position of the basement roof, and the hoisting lifting construction is carried out by using the outer frame steel structure hoisting equipment; if the weight of the outer frame steel structure of several continuous layers is within the bearing range of the outer frame steel structure hoisting equipment, the overall hoisting lifting of multiple layers is carried out; one hoisting point is arranged on each side of the steel column corresponding to the roof overhanging hanging steel truss, the hoisting lug plate is arranged on the two sides of the outer frame steel column in advance, and the hoisting construction of the outer frame steel column is carried out by using the lug plate; one hoisting point is arranged on each side of the outer frame steel beam corresponding to the position of the roof overhanging hanging steel truss at the connecting point of the outer frame steel beam and the core wall, the hoisting lug plate is arranged on the two sides of the end of the outer frame steel beam in advance, and the hoisting construction of the outer frame steel beam is carried out by using the lug plate.

7. The construction method of the reverse construction complete equipment system of the suspended structure according to claim 1, characterized in that, Step S8 comprises: The small roof crane is arranged on the roof overhanging hanging steel truss, the hoisting and reinforcement binding construction of the outer frame floor slab are carried out from top to bottom, the floor concrete is poured layer by layer from top to bottom by using the fixed pump, the steel wire mesh is erected along the outer frame steel beam direction at the connecting node position of the outer frame steel beam and the core wall before the pouring of the Nth floor structure concrete, and the post-pouring belt is not poured with concrete.

8. The construction method of the reverse construction complete equipment system of the suspension structure according to claim 1, characterized in that, Step S10 comprises: After the pouring of the floor structure concrete is completed, according to the structure deformation monitoring condition, after the vertical displacement of each floor structure is stable, the L-shaped connecting piece connecting the outer frame steel beam and the core wall is added layer by layer from bottom to top, the semi-rigid connection between the outer frame steel beam and the core wall is enhanced to rigid connection, and then the concrete in the post-pouring belt area is poured.

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