Steel structure-core tube equal-height synchronous climbing construction system oriented to construction time variation

Abstract

The utility model discloses a steel structure-core tube equal-height synchronous climbing construction system oriented to construction time variation. The steel structure-core tube equal-height synchronous climbing construction system comprises an embedded part overall installation system. Optimization design of fireproof joints between peripheral layers of the steel structure is carried out; the profiled steel sheet is free of a support system; an outer-frame-free same-layer construction system is adopted; a lantern frame system and a steel structure node optimization design are further included; and system supplementation is carried out through the design of an outer wall column protection frame body and the design of a material lifting platform. According to the utility model, based on the construction site, through the optimization design of the nodes and the optimization innovation of the construction system, the two different materials of the concrete cylinder and the outer frame steel column work cooperatively, and the technical problems of long construction period, high construction cost, large construction potential safety hazard and the like are solved.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to the design of a steel structure-core tube synchronous climbing construction system for construction that is oriented towards the time-varying nature of construction. Background Technology

[0002] With the rapid development of the construction industry, the diversification of architectural design appearances and the pluralism of structural designs have followed. Building structural forms are no longer limited to regular, ordinary reinforced concrete structures; irregularly shaped core tube steel plate shear walls and irregularly shaped exterior curtain wall steel structures have emerged as new contenders. This necessitates the updating of their construction techniques and processes. Among the many structural types, the frame-core tube structure, composed of an outer steel frame or steel-concrete composite / steel-tube concrete frame and a reinforced concrete core tube, is a typical type of super high-rise structure. Its core challenge lies in the high technical difficulty of coordinating the work between the concrete core and the outer frame steel columns, two different materials. By employing a construction technique of simultaneous, equal-height ascent, the vertical deformation and additional internal forces caused by time-varying factors during construction are reduced, achieving both improved efficiency and accelerated construction of the steel frame-core tube system.

[0003] Core-tube-steel-frame structures are widely used in buildings with heights between 100 and 500 meters due to their relatively low complexity and high structural stability. The advantages of core-tube-steel-frame structures lie not only in their stability but also in their ability to maintain good performance under external forces such as earthquakes and wind loads.

[0004] The synchronous climbing construction technology is an advanced construction method in which the core tube and steel outer frame are constructed simultaneously on the same floor and climb upwards at the same time. This method can significantly shorten the construction period and significantly reduce construction costs.

[0005] In addition, the synchronous equal-height climbing construction technology of high-rise steel frame-concrete core tube structure eliminates the need for large climbing scaffolding and adopts reusable temporary support measures, which saves materials to the maximum extent, improves construction efficiency, and emphasizes the concept of "green construction" during the construction process, achieving good energy-saving and environmental protection benefits. It has certain guiding significance for the construction of similar structural projects in the future. Utility Model Content

[0006] Technical Problem: This utility model is aimed at the construction of a steel structure-core tube synchronous climbing construction system that is variable during construction, and studies the collaborative working technology between two different materials, the concrete tube and the outer frame steel columns.

[0007] Technical Solution: The purpose of this utility model is to overcome the shortcomings and deficiencies of the existing technology and provide a synchronous climbing construction system for steel structures and core tubes that is oriented towards the time-varying nature of construction. This utility model achieves its purpose through the following technical solutions: a synchronous climbing construction system for steel structures and core tubes that is oriented towards the time-varying nature of construction, including the overall installation of embedded parts; optimized design of fireproof joints between layers of the steel structure perimeter; application of a profiled steel sheet support-free system; a scaffold-free same-layer construction system; further optimization of the lantern frame system; optimized design of steel structure joints; and design of protective frames for perimeter walls and columns.

[0008] The embedded parts and steel beams in the construction system adopt a pre-assembled design, fixed-size design, and precise processing.

[0009] The construction system uses high-strength outer concrete.

[0010] The fireproof joints of the steel beams in the construction system are made of ALC board and calcium silicate board.

[0011] The construction system adopts a continuous slab scheme.

[0012] The construction system includes a concrete column operation protection frame.

[0013] The construction system includes the addition of I-beams at the base of the lantern frame system.

[0014] In the construction system, the steel reinforcement connections are made using a combination of factory and on-site welding.

[0015] The construction system includes both horizontal soft and hard protection systems.

[0016] The construction system includes a protective frame with disc buckles added to the outer columns.

[0017] In the construction system, a material hoisting platform is set up before the steel structure beams are constructed. Beneficial effects

[0018] Compared with existing technologies, it has the following beneficial effects:

[0019] Reducing the waiting time for the installation and dismantling of the core tube climbing scaffolding significantly shortens the structural construction period; the outer horizontal structure and the core tube are cast in place as a whole, avoiding the need for cold joints during construction, which allows for better control of the construction quality of the concrete at the interface between the outer frame and the core tube, ensuring the coordinated action of the steel frame and the concrete core tube; avoiding the inconvenience of subsequent floor slab construction caused by the pre-reserved reinforcement of the interface plate; eliminating the impact of falling objects from the concrete roughening above during the construction of the core tube first and vertically intersecting; preventing the contamination of the surface of the installed steel structure components below by water flowing down during the core tube concrete pouring and curing, improving the quality of finished product protection and a safe and civilized image; eliminating the need for climbing scaffolding for the core tube, avoiding the safety risks of climbing scaffolding construction, and reducing construction costs; using reusable and easily dismantled temporary supports, resulting in a high material recycling rate. Synchronous climbing construction at the same height can significantly shorten the construction period, significantly reduce construction costs, maximize material savings, and improve construction efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram showing the installation location of the embedded parts;

[0021] Figure 2 This is a schematic diagram of the fireproofing nodes between layers on the outer perimeter of the steel structure;

[0022] Figure 3 This is a schematic diagram of a support-free system for profiled steel sheets.

[0023] Figure 4 This is a schematic diagram of the lantern frame system;

[0024] Figure 5 This is a schematic diagram of the cross-section of the disc buckle support in the lantern frame system;

[0025] Figure 6 Schematic diagram of the outer wall column protective frame;

[0026] Figure 7 This is a schematic diagram of the processing technology for steel structural components;

[0027] In the diagram, 1 represents the installation location of the embedded part, 2 represents the fireproof node between layers of the steel structure perimeter, 3 represents the profiled steel sheet support-free system, 4 represents the lantern frame system, 5 represents the cross-section of the lantern frame disc buckle support, 6 represents the protective frame of the perimeter wall column, 7 represents the concrete wall, 8 represents the 16mm thick double-sided connecting plate, 9 represents the top elevation of the embedded part (the top of the steel beam must be flush with the elevation), 10 represents the 25mm embedded anchor plate, 11 represents the reinforcing bar, 12 represents the calcium silicate board, 13 represents the steel beam, 14 represents the continuous plate, 15 represents the steel beam span, 16 represents the limiting plate, 17 represents the top support, 18 represents the diagonal tie rod, 19 represents the upright, 20 represents the horizontal bar, 21 represents the throw bar, 22 represents the safety net, 23 represents the assembly baseline, and 24 represents the through hole of the steel reinforcement. Detailed Implementation

[0028] This utility model discloses a synchronous climbing construction system for steel structure-core tube that is adaptable to changes during construction. The specific implementation method mainly includes the following:

[0029] First, to meet the overall installation requirements of the embedded parts (1), the embedded parts and steel beams need to be pre-assembled, with precise dimensional design and processing. The design should also be communicated to adjust the spacing and method of the corner reinforcement. In the manufacturing of the steel beams, the positions of the assembly baseline (23) and the through holes (24) should be used to ensure processing accuracy. During construction, the embedded parts with hooks should be precisely hoisted to the axis elevation position (9) and the accuracy should be calibrated to meet the standard deviation requirements to ensure the accuracy requirements of the system.

[0030] like Figure 1 As shown, taking the steel beam and concrete connection node in the synchronous climbing construction system of steel structure-concrete core tube of Nanjing Jiahua G72 project as an example, at node MJ04, the top surface elevation of the embedded part is flush with the top elevation of the steel beam (9). At the same time, the double-sided connection plate (8) connects the two different materials through the steel bar (11). The embedded anchor plate (10) between them improves the construction and installation efficiency during the construction process, ensures the installation quality of the embedded plate, and improves the engineering quality at the node.

[0031] Furthermore, the design of the fireproof joints (2) between the outer layers of the steel structure is optimized, such as... Figure 2 As shown, taking the fireproof node between steel structure floors in the Nanjing Jiahua G72 project as an example, the original design adopted a reinforced concrete hanging length of 1.055m, which is difficult to construct near the edge and difficult to reinforce. It also affects the setting of the outer frame. Considering all factors, the design was optimized, and a fireproof node method of ALC board plus calcium silicate board (12) wrapped around steel beam (13) was adopted. At the same time, the construction space for installation bolts, on-site welding, etc. and the hoisting sequence of components were considered, and construction space was reserved for installation bolts and on-site welding. The fire protection rating of the calcium silicate board (12) is A1. In a fire, the calcium silicate board will not burn, will not produce toxic or harmful gases, and has good isolation performance, which can effectively control the fire within a local area and ensure the fire safety of the structural system.

[0032] Furthermore, the design optimizes the stress direction of the profiled steel sheet (3) and meets the stress calculation requirements. The continuous plate (14) scheme is adopted, which needs to be laid perpendicular to the direction of the secondary beam. The maximum unsupported span is 3.6m, and the spacing of the steel beam span (15) is less than 3.6m, which meets the unsupported design.

[0033] like Figure 3As shown in the schematic diagram of the profiled steel sheet support-free system in the Nanjing Jiahua G72 project, the steel sheets should be laid perpendicular to the secondary beam direction according to the detailed drawings. Support is required for spans exceeding the design requirements. Support is also necessary at the junction of the profiled steel sheet and the core tube if it is a cantilevered end with a cantilever length exceeding the requirement. The profiled steel sheets must not be cut arbitrarily, and the specifications, location, and quantity of studs must be constructed according to the drawings. When tying the reinforcing bars on the profiled steel sheets, the bottom reinforcing bars must be fixed to prevent displacement during concrete pouring.

[0034] Furthermore, regarding the optimization of the lantern frame system (4), taking the lantern frame disc buckle support section diagram (5) in the Nanjing Jiahua G72 project as an example, the number of I-beams at the root of the lantern frame system is increased to improve the effective transmission and extension of the force. The lantern frame and the protective frame are effectively connected to ensure the safety of the core tube construction protection measures. The limiting plate (16) in the system ensures that the displacement of the lantern frame will not exceed the predetermined safety range, while the top support (17) of the lantern frame is equipped with I-beam crossbeams, and the top support (17) is filled with wooden blocks to fix the web of the I-beam to prevent slippage. The whole system serves as a support system for the steel beam at one end of the shear wall. Two uprights (19) are added between the support frames to assist the operation frame support. All the lantern frames are connected into a whole with ordinary steel pipes. There are three layers: top, middle and bottom. Steel mesh is laid above the middle crossbar (20) to facilitate standing. The diagonal bracing (18) is used for fixation. Finally, the throwing rod (21) is used to connect the whole laterally to increase the lateral stability of the lantern frame.

[0035] Furthermore, for the external structural design system, the concrete wall columns containing stiffened columns must be at least 1.1m away from the outer perimeter. An additional 14 concrete columns with stiffened structures are required to form protective scaffolding to ensure the scaffold-free design and construction requirements are met. During construction, additional horizontal protective measures are needed on the perimeter. Simultaneously, vertical edge protection is achieved by using hoisting and prefabricated clips to enclose the construction layer, realizing the effect of constructing one layer and then protecting it one layer at a time.

[0036] Furthermore, to optimize the design of steel structure nodes, the steel column and corbel nodes are complex, with many irregularities in the direction and angle of the corbels, and a large number of corbels (6 in total). The steel structure nodes are custom-cut and welded in the factory as a whole, and the steel bar connection adopts a combination of factory and on-site welding, which can solve the connection method and connection quality of the steel bars between the upper and lower corbels.

[0037] Furthermore, regarding the design of the protective frame for the outer wall columns (6), the connection of the scissor braces should preferably be done by overlapping, with an overlap length of not less than 1.00m. The overlapping section should be fixed by swivel couplers to ensure the stability of the protective frame. At the same time, to ensure construction safety, guardrails should be installed on the protective frame, with guardrails installed on the sidewalk or on the working surface. A disc buckle protective frame should be added to the outer columns, and safety nets (22) should be fully hung on three sides of the edges, with kickboards added.

[0038] like Figure 5 As shown in the schematic diagram of the outer wall column protection frame in the Nanjing Jiahua G72 project, each rope on the safety net (22) should be tied to the support, the surrounding ropes should be close to the support, and the knot should be convenient to tie, reliable to connect and easy to untie.

[0039] Furthermore, to ensure the proper stacking and safety of construction materials for the external steel structure, a hoisting platform is installed before the construction of the steel beams. The joints of the hoisting platform should be connected by bolts or welding, avoiding the use of fasteners. To ensure platform safety, its connection to the building must be reliable, and protective railings and dense mesh netting should be installed around it. The railing height should be no less than 1.5 meters, and the platform floor should be fully covered with steel plates or wooden planks and securely installed. Two platforms are installed, reinforced with a disc-buckle support system, and the panels are covered with templates. The hoisting platform is removed when half of the profiled steel sheet is laid.

[0040] The above construction instructions are preferred embodiments of this utility model, but the embodiments of this utility model are not limited to the above instructions. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of this utility model shall be considered equivalent substitutions and shall be included within the protection scope of this utility model.

Claims

1. A steel structure-core tube synchronous climbing construction system for construction with variable structure during construction, characterized by: This includes the installation of embedded parts, fireproof joints between layers of the steel structure perimeter, a profiled steel sheet support-free system, a scaffold-free same-layer construction system, a lantern frame system, steel structure joints, protective frames for perimeter walls and columns, and a hoisting platform. The embedded parts are installed by precisely hoisting hooked embedded parts to the axial elevation position. The fireproof joints between layers of the steel structure perimeter are wrapped with ALC and calcium silicate boards. The support-free profiled steel sheet system uses a continuous plate design. The scaffold-free same-layer construction system adds 14 concrete columns with internal stiffening structures. The lantern frame system increases the number of I-beams at the base and implements measures to secure the I-beams within the top support. In the optimized design of the steel structure joints, the rebar connections combine factory and on-site welding. The protective frame design for the perimeter walls and columns includes a disc-buckle protective frame. The hoisting platform design uses a disc-buckle support system.

2. The steel structure-core tube synchronous climbing construction system for construction time-varying conditions as described in claim 1, characterized in that: During the installation of the embedded parts, the embedded parts and steel beams adopt a pre-assembly design, with precise dimensional design and processing. The embedded parts with hooks are then precisely hoisted to the axis elevation position for calibration.

3. The steel structure-core tube synchronous climbing construction system for construction time-varying conditions as described in claim 1, characterized in that: The fireproof node uses calcium silicate board to wrap the steel beam, taking into account the construction space for installing bolts, on-site welding, etc., as well as the hoisting sequence of components, and reserving construction space for installing bolts and on-site welding.

4. The steel structure-core tube synchronous climbing construction system for construction time-varying conditions as described in claim 1, characterized in that: The profiled steel sheet support-free system adopts a continuous plate scheme, which is relatively simple to install. It needs to be laid perpendicular to the direction of the secondary beam, with a maximum unsupported span of 3.6m and the steel beam span spacing needs to be less than 3.6m.

5. The steel structure-core tube synchronous climbing construction system for construction-time-varying conditions as described in claim 1, characterized in that: The aforementioned scaffold-free, same-floor construction system adds 14 concrete columns with internal stiffening structures to the operation and protection frame to ensure the construction requirements of the scaffold-free design. At the same time, in order to reduce the investment in the enclosure system, improve construction efficiency, and reduce construction costs, the construction layer is protected by hoisting and prefabricated clips, realizing the construction and enclosure of one layer at a time.

6. The steel structure-core tube synchronous climbing construction system for construction-time-varying steel structures as described in claim 1, characterized in that: In the lantern frame system, the limiting plate restricts displacement, the top support is equipped with an I-beam crossbeam, the top support is filled with wooden blocks to fix the web of the I-beam, the support frame is added with uprights, steel mesh is laid above the middle crossbeam, and the throwing rod is laterally connected to the whole. At the same time, in order to ensure the stability and safety of the structural system, all support frames must be set in three consecutive layers.

7. The steel structure-core tube synchronous climbing construction system for construction-time-varying steel structures as described in claim 1, characterized in that: The system optimizes the design of steel structure nodes, including custom-cut and welded corbel nodes in the factory, and combines factory welding with on-site welding for rebar connections.

8. The steel structure-core tube synchronous climbing construction system for construction-time-varying steel structures as described in claim 1, characterized in that: The design of the protective frame for the outer wall columns in the system includes the use of overlapping joints for the connection of scissor braces, with an overlap length of not less than 1.00m. The connection is made using swivel couplers. Guardrails are also installed on the protective frame, and guardrails are installed on the sidewalk or on the working surface.

9. The steel structure-core tube synchronous climbing construction system for construction-time-varying steel structures as described in claim 1, characterized in that: The nodes of the hoisting platform should be connected by bolts or welding, avoiding the use of fasteners; the connection between the platform and the building must be reliable; protective railings and dense mesh netting should be installed around the platform, with the railing height not less than 1.5 meters, and the bottom surface of the platform should be fully covered with steel plates or wooden boards and securely installed.

Images