A multi-condition adaptive climbing formwork system based on a narrow core tube and a construction method

Abstract

The application relates to the technical field of building construction, in particular to a multi-working-condition self-adaptive climbing formwork system based on a narrow core tube and a construction method, which comprises the following steps: S100, initial assembly and system commissioning: core tube first floor construction and pre-buried attached wall anchoring piece, assembly of the hydraulic self-climbing formwork unit to form a multi-layer steel platform, and connection of a sub-regional hydraulic control system to complete trial climbing commissioning; S200, standard cycle and space coordination: execution of wall steel bar binding, concrete pouring and cycle climbing operation of frame body lifting; in the cycle climbing process, the construction elevator is synchronized with the construction progress to add a section, the car of the construction elevator directly reaches the climbing top layer platform, and the passage is connected through a multifunctional flap door device. Under the premise of effectively avoiding large-scale frame body dismantling and modification operation in the middle, the application effectively guarantees the efficiency, continuity and overall equipment operation safety of the super high-rise vertical structure comprehensive construction operation.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a multi-condition adaptive climbing formwork system and construction method based on a narrow core tube. Background Technology

[0002] In the construction of super high-rise buildings, the core tube-outer frame structure is a common structural form, and hydraulic climbing formwork systems are widely used for the vertical construction of the core tube. Existing hydraulic climbing formwork technology mainly uses hydraulic cylinders to drive guide rails and the frame to alternately lift, achieving continuous upward climbing of the formwork system along the wall. However, existing climbing formwork systems still have the following technical shortcomings in practical engineering applications: First, the integration of vertical transportation between existing climbing formwork and construction elevators is not high. In most solutions, the construction elevator can only reach the bottom of the climbing formwork or the lower scaffold platform, and personnel still need to climb more than ten floors inside the scaffold to reach the top working surface, which not only reduces construction efficiency but also increases safety risks. Although some solutions propose the idea of ​​elevators directly reaching the top of the climbing formwork, there is a lack of systematic structural design in terms of elevator shaft space, coordination between the wall-mounted structure and the climbing formwork, and dynamic sealing between the elevator door and the climbing formwork platform.

[0003] Second, existing climbing formwork systems are insufficiently adaptable to variable cross-sections where the core tube cross-section gradually decreases along the height direction. When the wall retracts by more than 150mm each time, the inclination angle of the climbing formwork will exceed 5 degrees, exceeding the safe climbing range of the climbing formwork. Although there are technical solutions for variable cross-section pads, these solutions are mainly designed for single, small variable cross-section conditions, and lack a systematic solution for multiple continuous variable cross-section conditions with a maximum retraction of 200mm.

[0004] Third, existing technologies require large-scale dismantling and modification of the climbing formwork during the construction of the cantilever truss layer, which is labor-intensive and poses high safety risks. Although there are patents for walkway slab devices that can pass through the cantilever truss, they are mainly applicable to the top formwork hanging frame. Existing solutions are not perfect for how to achieve rapid replacement of formwork units and layered avoidance of platform flip-up plates during the construction of the complete climbing formwork system in the cantilever truss layer.

[0005] Fourth, when constructing non-standard floors, existing technologies often use wooden formwork to extend the floor or to climb the floor in multiple stages, which results in insufficient rigidity and low construction efficiency.

[0006] Fifth, when multiple systems such as climbing formwork machines, construction elevators, and concrete placing booms are simultaneously accommodated within the limited space of the core tube, there is a lack of systematic solutions for spatial coordination and cross-operation management between these systems.

[0007] Sixth, in the existing construction methods of climbing formwork systems, the work processes between the various subsystems lack an effective coordination mechanism, which leads to mutual constraints between the construction of vertical and horizontal structures, thus prolonging the overall construction cycle. Summary of the Invention

[0008] This invention aims to solve comprehensive technical problems in the construction of super high-rise core tubes, such as variable vertical cross-sections, complex construction of outrigger truss layers, difficulties in connecting non-standard layers, and difficulties in coordinating multiple cross-operations, through multi-subsystem integration and collaborative control, so as to achieve efficient, safe and highly adaptable construction of the vertical structure of the core tube.

[0009] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a multi-condition adaptive climbing formwork system and construction method based on a narrow core tube. The system is applied to a multi-condition adaptive climbing formwork system, which includes multiple sets of hydraulic self-climbing formwork units arranged around the shear wall of the core tube, a construction elevator located inside the core tube, and a concrete placing boom located on the top platform. The construction method includes the following steps: S100, Initial Assembly and System Integration: Construct the first layer of the core tube and pre-embed wall anchors, assemble the hydraulic self-climbing formwork unit to form a multi-layer steel platform, and connect it to the regional hydraulic control system to complete the trial climbing integration. S200, Standard Cycle and Spatial Coordination: Performs cyclic climbing operations for wall reinforcement binding, concrete pouring, and scaffold lifting; during the cyclic climbing process, the construction elevator adds sections synchronously with the construction progress, allowing the elevator car to directly reach the top platform of the climbing formwork, and connecting the passage through a multi-functional flip-door device; in the pouring stage, the working support reaction force of the concrete placing boom is distributed and transferred to multiple hydraulic self-climbing formwork units by enlarging the frame base to achieve load self-adaptation; S300, Multi-condition Adaptive Adjustment: When structural changes occur during the construction of the core tube vertical structure, the climbing formwork system performs corresponding adaptive adjustments. When encountering variable cross-section working conditions, the climbing tilt angle of the climbing formwork guide rail is adjusted by the variable cross-section adaptive adjustment component, and the reset is completed step by step in the continuous subsequent floor climbing construction. When encountering a cantilever truss layer, the detachable template unit corresponding to the truss bracket is lifted off, and the platform flap assembly is opened layer by layer during the climbing process to avoid the truss bracket. When encountering non-standard floor conditions where the floor height is greater than the standard floor height, the back rib built-in height-adjusting steel formwork is detachably connected to the upper end of the main steel formwork for adaptive height adjustment; S400, Top-level dismantling and demolition: After the core tube vertical structure is constructed to the target height, the hydraulic self-climbing formwork unit and auxiliary facilities are dismantled in sections according to the preset sequence.

[0010] Further, in step S100, "constructing and pre-embedding wall anchors on the first floor of the core tube, and assembling the hydraulic self-climbing formwork unit to form a multi-layer steel platform" includes: The main steel formwork is configured according to the standard floor height of the core tube. High-strength bolts and climbing cones are pre-embedded as wall anchors during the construction of the first floor wall. After the concrete of the first floor wall reaches the preset strength, the formwork is removed, and the wall attachment device, guide rail and frame are installed in sequence. The assembled multi-layer steel platform is configured as a six-layer all-steel platform from top to bottom, specifically: a top platform consisting of a steel bar operation layer and a concrete operation layer; a formwork operation area consisting of a first formwork operation layer and a second formwork operation layer; and a climbing formwork operation area consisting of a first climbing formwork operation layer and a second climbing formwork operation layer.

[0011] Furthermore, in step S100, the specific execution method of "connecting to the regional hydraulic control system to complete the trial climb and joint debugging" is as follows: The hydraulic self-climbing formwork unit is divided into 11 hydraulic zones along the circumference of the core tube, of which the outer wall climbing formwork is divided into 6 zones and the inner tube climbing formwork is divided into 5 zones, and each hydraulic zone is equipped with an independent hydraulic control cabinet. After laying the hydraulic pipelines, displacement sensors and tilt sensors are installed on the guide rails or machine positions of each hydraulic zone, and the sensor signals are connected to the central microprocessor unit. During the trial climbing and commissioning phase, the sensors collect data on the climbing stroke and frame tilt of each machine position in real time. When the height difference or tilt angle of the machine positions in the same or adjacent zones exceeds the preset safety threshold, the central microprocessor unit automatically adjusts the oil inlet speed of the corresponding cylinder. After the assembly and commissioning of the hydraulic self-climbing formwork unit is completed, and before formally executing step S200, the process also includes the installation of a multi-level safety protection system: A first protective flap is installed and locked between the bottom platform of the climbing formwork and the wall, and a second protective flap is installed and locked at the segment connection points of each adjacent climbing formwork machine position. Stress and strain sensors are installed at the core structural truss of the concrete placing boom on the top platform; it can only be put into use after passing the joint acceptance of hydraulic oil circuit pressure test and frame climbing test.

[0012] Furthermore, in step S200, "the construction elevator car directly reaches the top platform of the climbing formwork, and the passage is connected through a multi-functional flip-door device" includes: The construction elevator cage is controlled to maintain a 350mm reserved gap with the top platform, and an elastic follow-up anti-fall skirt is provided at the edge of the reserved opening on the top platform or at the cage. When the elevator car is extended and stops at the top platform elevation as the construction progresses, the elevator operator operates the first direction flip door of the multi-functional flip door device to make it horizontally cross the reserved gap and closely connect with the top platform. At the same time, the elastic follow-up anti-fall skirt adaptively fills and flexibly seals the remaining gap of the reserved gap.

[0013] Furthermore, in step S200, the specific implementation process of "distributing and transmitting the working support reaction force of the concrete placing boom to multiple hydraulic self-climbing formwork units by increasing the size of the frame base" is as follows: The concrete placing boom is hoisted to the predetermined position on the top platform using a tower crane and erected on an enlarged frame base made of No. 32 I-beams. The support points of the enlarged frame base are respectively applied to the crossbeams of at least four climbing formwork positions, so as to distribute and transfer the maximum support reaction force of the concrete placing boom to multiple hydraulic self-climbing formwork units. During the concrete pouring operation, the stress and strain sensor monitors the local stress state of the core structural truss of the top platform in real time; when the local stress reaches 80% of the upper limit of the design bearing capacity, the control system automatically locks the hydraulic climbing power and the elevator stopping permission signal. Step S200 also includes interlocking safety control based on material strength and environmental variations: The standard cycle for the cyclic climbing operation is 5 days per layer, and the start of the scaffolding lifting program is subject to the mandatory prerequisite that the concrete strength of the wall reaches 10MPa or above after testing and verification by test blocks cured under the same conditions. During the cyclic climbing process, when the wind speed measured by the anemometer exceeds 12m / s, the system triggers the hardware-level safety interlock circuit, automatically cuts off the hydraulic climbing power and stops the elevator operation. At the same time, it controls the main steel formwork to reset to the mold closing position and uses steel pipes to temporarily tie and fix the frame to the main building structure.

[0014] Furthermore, in step S300, the step of "adjusting the climbing tilt angle of the climbing formwork guide rail by means of the variable cross-section adaptive adjustment component when encountering a variable cross-section working condition, and completing the reset step by step in the subsequent floor climbing construction" specifically executes multi-level compensation logic based on dynamic trajectory: The variable cross-section adaptive adjustment component is configured as a stepless adjustable slide rail base with a continuously adjustable trapezoidal thread screw and a ratchet and pawl locking structure. When the wall retracts inward by a maximum of 200mm in a single instance, the wall-mounted bracket is connected to the climbing cone embedded in the variable cross-section wall via the stepless adjustable slide rail. During the climbing process, the guide rail is smoothly transitioned to a preset tilt state by rotating the lead screw. After climbing each continuous construction floor, the adjusting slide rail seat is pushed inward by half the wall's internal shrinkage dimension and locked by the pawl. The vertical reset of the guide rail is completed step by step through three continuous construction floors, and the axis of the frame is corrected simultaneously.

[0015] Furthermore, the adaptive adjustment of the outrigger truss layer working conditions is specifically manifested as a set of spatial interference avoidance and rapid temporal recovery processes: At the position of the cantilever truss corbel, the pre-set detachable template with a width adapted to the safety distance of the corbel is lifted off as a whole, and wooden formwork is used to replace the construction of the local wall at this location; When the hydraulic self-climbing formwork unit climbs upward through the floor, the platform flap groups, which are configured at the vertical positions corresponding to the climbing formwork platform and the bracket, are flipped and opened one by one around the hinge to form an unobstructed passage for the bracket. After climbing over the corbel, the platform flap assembly is reset one by one downwards in reverse order of its original opening sequence to restore the horizontal passage protection, and the detachable template is re-hoisted into place to resume the all-steel formwork construction.

[0016] Furthermore, in step S4, the adaptive height adjustment process for the non-standard layer condition in step S300 is based on a modular combination design: When the current construction layer is identified as a non-standard layer with a height greater than the standard layer height, the back rib built-in height-adjusting steel formwork with a total height of 1500mm is activated. The back rib built-in height-adjusting steel formwork is composed of two separate steel formwork pieces, each 750mm high, assembled from the top and bottom. After the lower edge rib of the upper split steel mold and the upper edge rib of the lower split steel mold are detachably connected as one piece by bolt locking, the bottom end of the whole piece is detachably connected to the upper end of the main steel template by using the back rib built-in form. For the external corners or variable cross-section axis areas of the core tube, the system adaptively switches to an external extension module using double channel steel as the horizontal back rib, and connects it to the surrounding steel formwork in a modular matching manner.

[0017] Furthermore, in step S400, the specific dismantling sequence and spatial dismantling strategy for "dismantling the hydraulic self-climbing formwork unit and its auxiliary facilities in a pre-defined order" are as follows: Once the vertical structure of the core tube has been constructed to the second-to-top level, all climbing operations shall be stopped. The dismantling process is carried out in a top-down, segmented manner. The physical separation sequence of the dismantling process is strictly followed as follows: first, dismantle and lift the formwork system; second, dismantle the upper scaffold; then, depressurize and drain the hydraulic system pipelines and dismantle the hydraulic system; then, disconnect the wall-mounted brackets to remove the guide rails; and finally, dismantle the lower scaffold. During the above-mentioned segmented overall dismantling process, tower cranes were used in each dismantling stage to hoist large segmented modules as a whole. The segmented modules maintained their original assembly state in the air until they were lowered to the designated area on the ground, where the final disassembly of the components was completed.

[0018] On the other hand, a multi-condition adaptive climbing formwork system based on a narrow core tube is proposed, the system comprising: Self-climbing formwork module: It is arranged along the circumference of the core tube shear wall and attached to the core tube shear wall. The self-climbing formwork module includes multiple sets of hydraulic self-climbing formwork units. Each set of formwork units includes wall attachment device, guide rail, frame and formwork system. The frame is arranged from top to bottom as a steel reinforcement and concrete operation layer, the first and second formwork operation layer, and the first and second climbing formwork operation layer, for a total of six all-steel platforms. Spatial collaborative docking module: including a construction elevator arranged inside the core tube and a concrete placing boom that can be detachably installed on the top platform of the formwork; the construction elevator cage is equipped with a multi-functional flip-door device that matches the elevation of the top platform to achieve passage connection; the bottom of the concrete placing boom is supported on the crossbeams of multiple hydraulic self-climbing formwork units by an enlarged frame base to distribute the working support reaction force. Intelligent hydraulic sub-control module: Divides multiple hydraulic self-climbing mold frame units into multiple independent hydraulic zones along the circumference of the core tube; each hydraulic zone is equipped with an independent hydraulic control cabinet and flow valve, and realizes multi-position dynamic error self-correction and synchronous climbing control of the hydraulic self-climbing mold frame unit through integrated sensing and control unit; Multi-condition adaptive adjustment module: including variable cross-section adaptive component, truss layer avoidance component and non-standard layer height extension component; the variable cross-section adaptive component is used to adjust the climbing tilt angle of the guide rail and achieve graded reset when the cross-section is reduced; the truss layer avoidance component includes detachable template unit and platform flap assembly that can be folded and opened in layers; the non-standard layer height extension component includes back rib built-in split height extension steel mold that can be detachably connected to the main steel template; Multi-layer three-dimensional protection module: including the first protective flap installed between the bottom platform and the wall, the second protective flap installed between adjacent climbing formwork positions, the outer fall protection system, and the safety interlock and environmental early warning unit linked with the intelligent hydraulic sub-control module. Beneficial effects

[0019] This invention integrates a multi-layered all-steel climbing formwork, a construction elevator connecting the top platform, and a base-load-distributing concrete placing boom in three-dimensional space, effectively improving the efficiency of vertical transportation and construction operations in confined spaces. Simultaneously, the system integrates a dynamic trajectory graded compensation and adjustment mechanism for variable cross-section conditions, a platform flap avoidance and timing recovery process for outrigger truss layers, and a back-ribbed built-in split steel formwork module for non-standard layer conditions. Combined with a multi-sensor fusion closed-loop intelligent hydraulic sub-control system and a multi-level three-dimensional safety interlocking protection network, the formwork system can achieve smooth adaptation and continuous climbing under complex structural changes such as multiple shrinkages of the core tube cross-section, interference crossings of large components, and sudden changes in floor height. While effectively avoiding large-scale mid-construction dismantling and modification of the formwork, it effectively ensures the high efficiency, continuity, and overall safety of the comprehensive construction operations of ultra-high-rise vertical structures. Attached Figure Description

[0020] Figure 1 This is a flowchart of the construction method of the present invention; Figure 2 This is a diagram of the multi-condition adaptive climbing model system architecture of the present invention; Figure 3 This is a flowchart of the adaptive obstacle avoidance process for the outrigger truss layer of the present invention. Figure 4 This is a flowchart illustrating the process of dismantling the frame in sections as a whole according to the present invention. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but includes other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] The present invention will now be described in further detail with reference to the accompanying drawings: Example

[0024] like Figure 1-4 As shown, a multi-condition adaptive climbing formwork construction method based on a narrow core tube is applied to a multi-condition adaptive climbing formwork system. The climbing formwork system includes multiple sets of hydraulic self-climbing formwork units arranged around the shear wall of the core tube, a construction elevator arranged inside the core tube, and a concrete placing boom set on the top platform. The construction method includes the following steps: S100, Initial Assembly and System Commissioning: Construct the first floor of the core tube and pre-embed wall anchors, assemble hydraulic self-climbing formwork units to form a multi-layer steel platform, and connect to the regional hydraulic control system to complete trial climbing and commissioning. S200, Standard Cycle and Spatial Coordination: Performs cyclic climbing operations for wall reinforcement binding, concrete pouring, and scaffold lifting; during the cyclic climbing process, the construction elevator adds sections synchronously with the construction progress, allowing the elevator car to reach the top platform of the climbing formwork directly, and connecting the passage through a multi-functional flip-door device; in the pouring stage, the working support reaction force of the concrete placing boom is distributed and transferred to multiple hydraulic self-climbing formwork units by enlarging the frame base to achieve load self-adaptation; S300, Multi-condition Adaptive Adjustment: When structural changes occur during the construction of the core tube vertical structure, the climbing formwork system performs corresponding adaptive adjustments. When encountering variable cross-section working conditions, the climbing tilt angle of the climbing formwork guide rail is adjusted by the variable cross-section adaptive adjustment component, and the reset is completed step by step in the continuous subsequent floor climbing construction. When encountering a cantilever truss layer, the detachable template unit corresponding to the truss bracket is lifted off, and the platform flap assembly is opened layer by layer during the climbing process to avoid the truss bracket. When encountering non-standard floor conditions where the floor height is greater than the standard floor height, the back rib built-in height-adjusting steel formwork is detachably connected to the upper end of the main steel formwork for adaptive height adjustment; S400, Top-level dismantling and demolition: After the core tube vertical structure is constructed to the target height, the hydraulic self-climbing formwork unit and auxiliary facilities are dismantled in sections according to the preset sequence.

[0025] Furthermore, the specific implementation process of step S100 is as follows: Step S100 begins with the first floor of the core tube. First, the main steel formwork is configured according to the design floor height parameters of the standard core tube floor. During the first-floor wall reinforcement binding and formwork erection process, high-strength bolts and climbing cones required for the subsequent support of the climbing formwork wall attachment device are simultaneously pre-embedded.

[0026] Each hydraulic self-climbing formwork unit is equipped with a double-embedded assembly structure. The center-to-center distance of the double-embedded assemblies in the horizontal direction is precisely set to 320mm, and in terms of vertical positioning, they are fixed at a position 850mm below the current structural floor elevation. After the first-floor wall concrete is poured and the test blocks cured under the same conditions reach the preset compressive strength threshold, demolding is carried out and the main steel formwork is removed.

[0027] After the construction of the basic anchor points is completed, the mechanical component assembly stage of the climbing formwork system begins. First, the wall-mounted devices are fitted and fixed onto the pre-embedded climbing cones, then the guide rails and supporting frame are hoisted and connected sequentially. This frame is rigidly assembled vertically into a six-layer all-steel platform structure. From top to bottom, the first layer is the rebar operating layer, and the second layer is the concrete operating layer. These two layers are rigidly connected to the horizontal main and secondary beams via load-bearing columns, together forming the top platform for supporting construction personnel and subsequent concrete placing machines. The third layer is configured as the first formwork operating layer, and the fourth layer as the second formwork operating layer. These two layers together constitute the formwork operation area, with reserved space for mechanical tracks to allow the main steel formwork to move horizontally for demolding. The fifth layer is configured as the first climbing formwork operating layer, and the sixth layer as the second climbing formwork operating layer. These two layers together constitute the climbing formwork operation area, used to house the hydraulic jacking mechanism and bottom protective facilities.

[0028] After the mechanical frame assembly is completed, the piping for the regional hydraulic control system and sensor network is laid. Multiple sets of hydraulic self-climbing formwork units, arranged circumferentially around the core tube shear wall, are divided into 11 independent hydraulic control zones. The climbing formwork positions attached to the outer surface of the core tube are grouped into 6 outer wall hydraulic zones, and the climbing formwork positions attached to the inner shear wall are grouped into 5 inner tube hydraulic zones. Each hydraulic zone is independently equipped with a hydraulic control cabinet and corresponding branch control valve groups. Simultaneously with the hydraulic piping laying, high-precision displacement sensors and tilt sensors are installed at the guide rail sliding nodes or the load-bearing main shafts of each hydraulic zone, and the data transmission bus of all sensors is connected to the central microprocessor unit located in the main control room.

[0029] The system then entered the trial climbing and commissioning phase. First, pressure holding tests were conducted on the hydraulic circuit systems of each zone to check the sealing performance of each flange interface and high-pressure hose. During the frame trial climbing process, displacement and tilt sensors collected real-time data on the extension stroke of the hydraulic cylinders at each machine position and the vertical tilt parameters of the frame at millisecond-level sampling frequencies. The central microprocessor unit compared the data from these multi-source sensors in real time. When the calculation logic determined that the elevation difference or spatial tilt angle between machine positions within the same zone or between adjacent hydraulic zones exceeded the safety threshold set in the system, the central microprocessor unit immediately output a digital control signal to the corresponding electromagnetic proportional flow valve. By steplessly adjusting the oil inlet speed of a specific hydraulic cylinder, dynamic error self-correction and closed-loop intelligent synchronous climbing of multiple machine positions were achieved.

[0030] After confirming the normal operation of the mechanical and hydraulic systems through joint commissioning, the physical installation of the multi-level safety protection system was carried out. A first protective flap was installed between the bottom platform of the frame (i.e., the second climbing formwork operating level) and the structural wall via a pivot shaft, and locked in place by a mechanical locking mechanism. Simultaneously, a second protective flap was installed and locked at the segmental connection gaps of adjacent climbing formwork positions in the circumferential direction, secured by hinges. Furthermore, stress and strain sensors were installed on the core structural truss nodes of the top platform, designed to support the concrete placing boom, using epoxy resin bonding or welding to establish initial zero-point calibration data.

[0031] Furthermore, the specific implementation process of step S200 is as follows: The cyclical operation process encompasses wall reinforcement binding, continuous concrete pouring, formwork removal and relocation, installation of the upper-level wall attachment device, guide rail lifting, and scaffold body climbing. In the control logic for initiating the scaffold lifting program, the concrete strength of the wall is used as a mandatory physical prerequisite. Specifically, after the current layer of wall concrete is poured, test blocks cured under the same conditions are simultaneously produced according to a preset cycle. Only when the compressive strength of the test block reaches 10MPa or higher can the central microprocessor unit release the system's climbing lock and allow the output of hydraulic action execution signals. Furthermore, throughout the entire cyclic climbing cycle, the system collects real-time environmental data using an anemometer mounted on the top of the scaffold. When the measured instantaneous wind speed exceeds 12m / s, the control system automatically triggers a hardware-level safety interlock circuit, cutting off the power supply to the hydraulic pump station and sending a construction elevator prohibition command. Under this environmental threshold, the operator is instructed to reset the template system to the closed formwork position and insert tie bolts for temporary rigid fixation. At the same time, the frame body is temporarily connected to the solidified building structure using steel pipe support components to ensure structural stability under extreme working conditions.

[0032] At the spatial coordination and docking level of vertical transportation equipment, the standard guide rail sections of the construction elevators located inside the core tube are added synchronously with the construction progress of the main building structure. The specific height configuration for adding sections must ensure that the top running elevation of the construction elevator car matches the structural elevation of the top platform of the climbing formwork system at any working elevation. In terms of mechanical layout and interface transition, a physical reserved gap of 350mm is set between the outer edge of the construction elevator cage and the edge of the reserved opening of the top platform of the climbing formwork. The edge of the reserved opening or the bottom of the cage door frame is equipped with an elastic follow-up anti-fall skirt mechanism. When the construction elevator car stops at the corresponding elevation of the top platform and the elevator operator operates to open the first direction flip door of the multi-functional flip door device near the top platform of the climbing formwork, the first direction flip door crosses the 350mm reserved gap in the horizontal direction and achieves physical close docking with the edge load-bearing beam of the top platform. During the horizontal unfolding of the first-direction flip door, the elastic follow-up anti-fall skirt is deformed by the mechanical linkage, adaptively filling the remaining space gap between the edge of the flip door and the gap side wall, thereby establishing a fully enclosed flexible physical seal channel between the ladder cage and the climbing formwork platform, blocking the falling path of small materials or concrete residue.

[0033] In the load adaptive distribution phase of concrete pouring, a tower crane is used to hoist the mobile concrete placing boom to the predetermined structural plane area of ​​the top platform. To prevent concentrated eccentric loads during boom operation from causing localized shear damage to the top platform structure, an enlarged frame-type base, assembled and welded from No. 32 I-beams, is pre-erected in the inner cylinder platform area. The geometric base area of ​​the enlarged frame-type base is larger than the original base area of ​​the boom itself, and through precise span design, the bottom bearing support points of the enlarged frame-type base correspond to the load-bearing beams of at least four independent climbing formwork positions. The main structure of the boom is anchored to the enlarged frame-type base with high-strength bolts, ensuring that the working support reaction force of up to 105kN generated by the boom during full rotation and concrete pumping operations is evenly and dispersedly transmitted to the main structural components of multiple hydraulic self-climbing formwork units through the enlarged frame-type base structure.

[0034] During the continuous pouring of concrete in layers, stress and strain sensors located at the core structural truss of the top platform continuously collect local stress and deformation data of the load-bearing components. When the central microprocessor unit calculates and compares the data and finds that the local stress peak reaches 80% of the upper limit of the design bearing capacity of the metal component, the system immediately triggers a safety protection subroutine, automatically locking the extension circuit of the hydraulic cylinder and the stop permission signal of the construction elevator. After the concrete layer is poured and the structure reaches the preset strength, the workers loosen the temporary physical connection between the concrete placing pump pipe and the reserved gap on the platform, and use a tower crane to lift the concrete placing boom off the platform working surface. The remaining concrete residue on the platform surface is then cleaned up, thus completing a single standard spatial coordination and heavy-load transfer cycle. Furthermore, the specific implementation process of step S300 is as follows: For the variable cross-section condition where the core tube wall shrinks inward along its vertical section, this embodiment employs a multi-level compensation logic based on dynamic trajectory for adaptive climbing of the frame posture. When the maximum single inward shrinkage of the wall reaches 200mm, the system activates the variable cross-section adaptive adjustment component. This component abandons the traditional static pad replacement mode and is instead configured as a stepless adjustable slide rail seat with a continuously adjustable trapezoidal threaded screw and a ratchet pawl locking structure. During the climbing preparation stage of the variable cross-section layer, the operator mechanically connects the wall-mounted bracket to the extended high-strength bolts and climbing cones pre-embedded in the shrinking wall of the variable cross-section layer via the stepless adjustable slide rail seat. During the hydraulic climbing action, due to the horizontal misalignment between the old and new anchor points, the guide rail will be forced into a preset physical tilt state. To strictly control the overall tilt angle of the scaffolding within a safe and stable range, the system executes a graded approximation and reset procedure: Each time the scaffolding ascends a consecutive structural floor, workers drive the scaffolding to advance horizontally inward by half the total inward dimension of the wall at that point by rotating the trapezoidal threaded screw on the continuously adjustable slide rail. Once in place, a ratchet and pawl mechanism physically locks the scaffolding in place. This dynamic adjustment and compensation process is performed across three consecutive construction floors, ultimately achieving a complete reset of the guide rail's verticality. Simultaneously, the slide rail is used to precisely correct the cross-sectional dimensions of the formwork and the overall load-bearing axis of the scaffolding.

[0035] For the core tube outrigger truss layer construction, the adaptive adjustment manifests as a set of physical space interference avoidance and mechanical timing recovery processes. When construction progresses to the floor with large outrigger truss structures, the truss brackets protrude horizontally beyond the outer edge of the core tube wall, inevitably causing spatial interference with the normal climbing path of the climbing formwork. At this stage, workers use tower cranes to lift the detachable formwork units, pre-positioned at the corresponding nodes of the outrigger truss brackets with widths strictly matching the safety distance between the brackets, as a whole. Wooden formwork is then used to replace these units in the local node area for concrete pouring. During the dynamic process of the wall solidifying and the hydraulic self-climbing formwork unit climbing upwards to cross the floor, the platform flap assembly, located inside the climbing formwork platform and vertically interfering with the brackets, is activated. This platform flap assembly consists of multiple walkway panels and a heavy-duty hinged connection structure. As the scaffolding is raised, workers, based on the intrusion height of the corbel, flip and open the walkway panels in the interference area layer by layer around the corresponding hinges, temporarily creating a vertical passageway in the originally closed horizontal walkway for the corbel to pass through without obstruction. After the hydraulic system drives the scaffolding to climb over the corbel structure, workers immediately reverse the original upward flipping sequence, flipping and locking the walkway panels downward one by one to immediately restore the platform's horizontal passage load-bearing function and edge fall protection function. Subsequently, the previously hoisted detachable formwork units are repositioned and secured, thus restoring the platform to a standardized construction state with all-steel formwork.

[0036] For non-standard core tube floor conditions, the system implements an adaptive modular combination extension procedure based on the structural design floor height parameters. When the calculation identifies the current construction floor as a non-standard floor with a floor height greater than the standard floor height, the system activates a back-rib built-in extension steel formwork system with a total height set at 1500mm. To address the technical shortcomings of interference during hoisting of ultra-long extension formwork in confined spaces and insufficient rigidity, this back-rib built-in extension steel formwork is designed to be assembled from two separate steel formwork panels, each with a height of 750mm. Its panel thickness is made of 6mm high-strength steel plate, and its internal support frame uses 80×40mm rectangular steel pipes as vertical back ribs and frame vertical back ribs, employing a built-in back rib physical configuration to avoid surface interference with surrounding components. During assembly, the lower edge reinforcement of the upper split steel formwork and the upper edge reinforcement of the lower split steel formwork are first locked together as an integral mechanical structure using an array of high-strength bolts. Then, the bottom end of the upper part of the formwork is detachably and rigidly connected to the top end of the main steel formwork (the height is configured to be the standard floor height plus the preset lower wrap height) using an internal back rib. This modular stacking quickly compensates for the increased vertical space span of the non-standard floor. Furthermore, for key nodes such as the core tube corner, the cantilever truss bracket, and the variable cross-section axis, which are subject to complex stresses and are prone to formwork deformation, the system adaptively switches and configures an external back rib extension module. This external module uses two 10# channel steels welded in parallel as horizontal back ribs, which enhances the local bending section modulus. Moreover, its edge connection holes are seamlessly matched with the modulus of the surrounding steel formwork, thereby constructing a high-rigidity integral closed formwork system that adapts to the variable geometric characteristics of the non-standard floor. When encountering non-standard floor conditions where the floor height is less than the standard floor height, the system does not physically extend the original formwork system. Instead, it controls the pumping flow and elevation of the concrete placing boom to stop the concrete pouring at the preset lower elevation position. Then, it precisely embeds the wall-mounted components required for the next layer's hydraulic climbing mechanism in the corresponding lower elevation wall area. Furthermore, the specific implementation process of step S400 is as follows: Once the core tube's vertical structure has been constructed to the second-to-top level and the concrete work for that level has been completed, the system enters the exit procedure, ceasing all climbing operations and hydraulic power output. The demolition work strictly follows a top-down reverse physical separation sequence, and the entire demolition process utilizes a tower crane for hoisting.

[0037] First, the dismantling and hoisting of the formwork system are carried out. Workers release the tie bolts and mechanical connections between the main steel formwork and the extended steel formwork and the load-bearing components of the frame. After the formwork system is completely freed from the frame's constraints, it is hoisted as an independent spatial module from the core tube working face using the tower crane's sling hooks and lifting lugs.

[0038] Next, the dismantling of the upper frame was carried out. Workers disconnected the structural connection points between the top platform and the formwork work area, separating this multi-layered all-steel platform structure from the components below. With the assistance of a tower crane, the upper frame was lifted and moved spatially as a complete large segmented module.

[0039] Next, the hydraulic system was physically separated and dismantled. Before dismantling, technicians activated the hydraulic pipeline valves to perform the system's depressurization and purging procedures, reducing the pressure in the pipelines to atmospheric pressure. After confirming safety, the mechanical hinge pins between the hydraulic cylinders and the guide rails and frame were disconnected, and the physical connections of the branch control valves, independent hydraulic control cabinets, and high-pressure hoses were sequentially disconnected. The hydraulic components were then categorized and loaded into specialized lifting containers for hoisting.

[0040] The guide rail system was then dismantled. Workers released the load-bearing connecting pins between the guide rail and the wall-mounted device fixed to the main structure. The tower crane hooked the top of the guide rail and applied tension along its vertical axis, pulling the guide rail upwards from the guide groove of the frame.

[0041] Finally, the dismantling of the lower frame was carried out. The remaining first climbing formwork operating level, second climbing formwork operating level, and the multi-level safety protection flaps at the bottom were disassembled and separated, and the final modular parts were lifted away by tower crane.

[0042] During the segmented dismantling process, each dismantling stage involved the hoisting of large segmented modules as a whole. Throughout the entire phase of the module detaching from the core tube and being displaced in the air, each segmented module strictly maintained its initial structural assembly state. Only after the tower crane smoothly lowered the segmented module to a pre-planned designated area on the ground did the workers carry out the final dismantling operations. This physical separation strategy transferred all complex structural dismantling actions to the ground, physically eliminating the risk of falling components from height.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-condition adaptive climbing formwork construction method based on a narrow core tube, applied to a multi-condition adaptive climbing formwork system, the climbing formwork system comprising multiple sets of hydraulic self-climbing formwork units arranged around the shear wall of the core tube, a construction elevator arranged inside the core tube, and a concrete placing boom set on the top platform, characterized in that, The construction method includes the following steps: S100, Initial Assembly and System Integration: Construct the first layer of the core tube and pre-embed wall anchors, assemble the hydraulic self-climbing formwork unit to form a multi-layer steel platform, and connect it to the regional hydraulic control system to complete the trial climbing integration. S200, Standard Cycle and Spatial Coordination: Performs cyclic climbing operations for wall reinforcement binding, concrete pouring, and scaffold lifting; during the cyclic climbing process, the construction elevator adds sections synchronously with the construction progress, allowing the elevator car to directly reach the top platform of the climbing formwork, and connecting the passage through a multi-functional flip-door device; in the pouring stage, the working support reaction force of the concrete placing boom is distributed and transferred to multiple hydraulic self-climbing formwork units by enlarging the frame base to achieve load self-adaptation; S300, Multi-condition Adaptive Adjustment: When structural changes occur during the construction of the core tube vertical structure, the climbing formwork system performs corresponding adaptive adjustments. When encountering variable cross-section working conditions, the climbing tilt angle of the climbing formwork guide rail is adjusted by the variable cross-section adaptive adjustment component, and the reset is completed step by step in the continuous subsequent floor climbing construction. When encountering a cantilever truss layer, the detachable template unit corresponding to the truss bracket is lifted off, and the platform flap assembly is opened layer by layer during the climbing process to avoid the truss bracket. When encountering non-standard floor conditions where the floor height is greater than the standard floor height, the back rib built-in height-adjusting steel formwork is detachably connected to the upper end of the main steel formwork for adaptive height adjustment; S400, Top-level dismantling and demolition: After the core tube vertical structure is constructed to the target height, the hydraulic self-climbing formwork unit and auxiliary facilities are dismantled in sections according to the preset sequence.

2. The multi-condition adaptive climbing formwork construction method based on a narrow core tube according to claim 1, characterized in that, In step S100, "constructing and pre-embedding wall anchors on the first floor of the core tube, and assembling the hydraulic self-climbing formwork unit to form a multi-layer steel platform" includes: The main steel formwork is configured according to the standard floor height of the core tube. High-strength bolts and climbing cones are pre-embedded as wall anchors during the construction of the first floor wall. After the concrete of the first floor wall reaches the preset strength, the formwork is removed, and the wall attachment device, guide rail and frame are installed in sequence. The assembled multi-layer steel platform is configured as a six-layer all-steel platform from top to bottom, specifically: a top platform consisting of a steel bar operation layer and a concrete operation layer; a formwork operation area consisting of a first formwork operation layer and a second formwork operation layer; and a climbing formwork operation area consisting of a first climbing formwork operation layer and a second climbing formwork operation layer.

3. The multi-condition adaptive climbing formwork construction method based on a narrow core tube according to claim 2, characterized in that, In step S100, the specific execution method of "connecting to the regional hydraulic control system to complete the trial climb and joint debugging" is as follows: The hydraulic self-climbing formwork unit is divided into 11 hydraulic zones along the circumference of the core tube, of which the outer wall climbing formwork is divided into 6 zones and the inner tube climbing formwork is divided into 5 zones, and each hydraulic zone is equipped with an independent hydraulic control cabinet. After laying the hydraulic pipelines, displacement sensors and tilt sensors are installed on the guide rails or machine positions of each hydraulic zone, and the sensor signals are connected to the central microprocessor unit. During the trial climbing and commissioning phase, the sensors collect data on the climbing stroke and frame tilt of each machine position in real time. When the height difference or tilt angle of the machine positions in the same or adjacent zones exceeds the preset safety threshold, the central microprocessor unit automatically adjusts the oil inlet speed of the corresponding cylinder. After the assembly and commissioning of the hydraulic self-climbing formwork unit is completed, and before formally executing step S200, the process also includes the installation of a multi-level safety protection system: A first protective flap is installed and locked between the bottom platform of the climbing formwork and the wall, and a second protective flap is installed and locked at the segment connection points of each adjacent climbing formwork machine position. Stress and strain sensors are installed at the core structural truss of the concrete placing boom on the top platform; it can only be put into use after passing the joint acceptance of hydraulic oil circuit pressure test and frame climbing test.

4. The multi-condition adaptive climbing formwork construction method based on a narrow core tube according to claim 3, characterized in that, In step S200, "the construction elevator car directly reaches the top platform of the climbing formwork, and the passage is connected through a multi-functional flip-door device" includes: The construction elevator cage is controlled to maintain a 350mm reserved gap with the top platform, and an elastic follow-up anti-fall skirt is provided at the edge of the reserved opening on the top platform or at the cage. When the elevator car is extended and stops at the top platform elevation as the construction progresses, the elevator operator operates the first direction flip door of the multi-functional flip door device to make it horizontally cross the reserved gap and closely connect with the top platform. At the same time, the elastic follow-up anti-fall skirt adaptively fills and flexibly seals the remaining gap of the reserved gap.

5. The multi-condition adaptive climbing formwork construction method based on a narrow core tube according to claim 4, characterized in that, In step S200, the specific implementation process of "distributing and transmitting the working support reaction force of the concrete placing boom to multiple hydraulic self-climbing formwork units by increasing the size of the frame base" is as follows: The concrete placing boom is hoisted to the predetermined position on the top platform using a tower crane and erected on an enlarged frame base made of No. 32 I-beams. The support points of the enlarged frame base are respectively applied to the crossbeams of at least four climbing formwork positions, so as to distribute and transfer the maximum support reaction force of the concrete placing boom to multiple hydraulic self-climbing formwork units. During the concrete pouring operation, the stress and strain sensor monitors the local stress state of the core structural truss of the top platform in real time; when the local stress reaches 80% of the upper limit of the design bearing capacity, the control system automatically locks the hydraulic climbing power and the elevator stopping permission signal. Step S200 also includes interlocking safety control based on material strength and environmental variations: The standard cycle for the cyclic climbing operation is 5 days per layer, and the start of the scaffolding lifting program is subject to the mandatory prerequisite that the concrete strength of the wall reaches 10MPa or above after testing and verification by test blocks cured under the same conditions. During the cyclic climbing process, when the wind speed measured by the anemometer exceeds 12m / s, the system triggers the hardware-level safety interlock circuit, automatically cuts off the hydraulic climbing power and stops the elevator operation. At the same time, it controls the main steel formwork to reset to the mold closing position and uses steel pipes to temporarily tie and fix the frame to the main building structure.

6. The multi-condition adaptive climbing formwork construction method based on a narrow core tube according to claim 5, characterized in that, In step S300, the step of "when encountering a variable cross-section working condition, adjusting the climbing tilt angle of the climbing formwork guide rail through the variable cross-section adaptive adjustment component, and completing the reset step by step in the subsequent floor climbing construction" specifically executes multi-level compensation logic based on dynamic trajectory: The variable cross-section adaptive adjustment component is configured as a stepless adjustable slide rail base with a continuously adjustable trapezoidal thread screw and a ratchet and pawl locking structure. When the wall retracts inward by a maximum of 200mm in a single instance, the wall-mounted bracket is connected to the climbing cone embedded in the variable cross-section wall via the stepless adjustable slide rail. During the climbing process, the guide rail is smoothly transitioned to a preset tilt state by rotating the lead screw. After climbing each continuous construction floor, the adjusting slide rail seat is pushed inward by half the wall's internal shrinkage dimension and locked by the pawl. The vertical reset of the guide rail is completed step by step through three continuous construction floors, and the axis of the frame is corrected simultaneously.

7. The multi-condition adaptive climbing formwork construction method based on a narrow core tube according to claim 6, characterized in that, The adaptive adjustment of the outrigger truss layer working condition is specifically manifested as a set of spatial interference avoidance and rapid temporal recovery processes: At the position of the cantilever truss corbel, the pre-set detachable template with a width adapted to the safety distance of the corbel is lifted off as a whole, and wooden formwork is used to replace the construction of the local wall at this location; When the hydraulic self-climbing formwork unit climbs upward through the floor, the platform flap groups, which are configured at the vertical positions corresponding to the climbing formwork platform and the bracket, are flipped and opened one by one around the hinge to form an unobstructed passage for the bracket. After climbing over the corbel, the platform flap assembly is reset one by one downwards in reverse order of its original opening sequence to restore the horizontal passage protection, and the detachable template is re-hoisted into place to resume the all-steel formwork construction.

8. The multi-condition adaptive climbing formwork construction method based on a narrow core tube according to claim 7, characterized in that, In step S4, the adaptive height adjustment process for the non-standard layer condition in step S300 is based on a modular combination design: When the current construction layer is identified as a non-standard layer with a height greater than the standard layer height, the back rib built-in height-adjusting steel formwork with a total height of 1500mm is activated. The back rib built-in height-adjusting steel formwork is composed of two separate steel formwork pieces, each 750mm high, assembled from the top and bottom. After the lower edge rib of the upper split steel mold and the upper edge rib of the lower split steel mold are detachably connected as one piece by bolt locking, the bottom end of the whole piece is detachably connected to the upper end of the main steel template by using the back rib built-in form. For the external corners or variable cross-section axis areas of the core tube, the system adaptively switches to an external extension module using double channel steel as the horizontal back rib, and connects it to the surrounding steel formwork in a modular matching manner.

9. A multi-condition adaptive climbing formwork construction method based on a narrow core tube according to claim 8, characterized in that, In step S400, the specific dismantling sequence and spatial dismantling strategy for "dismantling the hydraulic self-climbing formwork unit and auxiliary facilities in a pre-defined sequence" are as follows: Once the vertical structure of the core tube has been constructed to the second-to-top level, all climbing operations shall be stopped. The dismantling process is carried out in a top-down, segmented manner. The physical separation sequence of the dismantling process is strictly followed as follows: first, dismantle and lift the formwork system; second, dismantle the upper scaffold; then, depressurize and drain the hydraulic system pipelines and dismantle the hydraulic system; then, disconnect the wall-mounted brackets to remove the guide rails; and finally, dismantle the lower scaffold. During the above-mentioned segmented overall dismantling process, tower cranes were used in each dismantling stage to hoist large segmented modules as a whole. The segmented modules maintained their original assembly state in the air until they were lowered to the designated area on the ground, where the final disassembly of the components was completed.

10. A multi-condition adaptive climbing formwork system based on a narrow core tube, and a multi-condition adaptive climbing formwork construction method based on a narrow core tube according to any one of claims 1-9, characterized in that, The system includes, Self-climbing formwork module: It is arranged along the circumference of the core tube shear wall and attached to the core tube shear wall. The self-climbing formwork module includes multiple sets of hydraulic self-climbing formwork units. Each set of formwork units includes wall attachment device, guide rail, frame and formwork system. The frame is arranged from top to bottom as a steel reinforcement and concrete operation layer, the first and second formwork operation layer, and the first and second climbing formwork operation layer, for a total of six all-steel platforms. Spatial collaborative docking module: including a construction elevator arranged inside the core tube and a concrete placing boom that can be detachably installed on the top platform of the formwork; the construction elevator cage is equipped with a multi-functional flip-door device that matches the elevation of the top platform to achieve passage connection; the bottom of the concrete placing boom is supported on the crossbeams of multiple hydraulic self-climbing formwork units by an enlarged frame base to distribute the working support reaction force. Intelligent hydraulic sub-control module: Divides multiple hydraulic self-climbing mold frame units into multiple independent hydraulic zones along the circumference of the core tube; each hydraulic zone is equipped with an independent hydraulic control cabinet and flow valve, and realizes multi-position dynamic error self-correction and synchronous climbing control of the hydraulic self-climbing mold frame unit through integrated sensing and control unit; Multi-condition adaptive adjustment module: including variable cross-section adaptive component, truss layer avoidance component and non-standard layer height extension component; the variable cross-section adaptive component is used to adjust the climbing tilt angle of the guide rail and achieve graded reset when the cross-section is reduced; the truss layer avoidance component includes detachable template unit and platform flap assembly that can be folded and opened in layers; the non-standard layer height extension component includes back rib built-in split height extension steel mold that can be detachably connected to the main steel template; Multi-layer three-dimensional protection module: including the first protective flap installed between the bottom platform and the wall, the second protective flap installed between adjacent climbing formwork positions, the outer fall protection system, and the safety interlock and environmental early warning unit linked with the intelligent hydraulic sub-control module.

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