Disclosed is a construction method for a limit rail translation stable construction of a building laminated slab based on a disc buckle support

Abstract

The application discloses a construction method of a limit rail translation stable construction of a building laminated slab based on a disc buckle support, relates to the technical field of fabricated building construction, and adopts BIM technology to construct a building laminated slab construction integrated model with G4 precision, so as to determine the disc buckle support and the translation limit rail point, accordingly to erect the disc buckle support anchored by chemical anchors at the bottom, and to lay the translation limit rail with a stroke limit steel baffle on the adjustable top support of the disc buckle support; the translation mechanism integrated with the hydraulic jacking and the pulley block is assembled on the translation limit rail and the no-load test is completed; the building laminated slab is hoisted by using a four-point hoist, the translation mechanism is controlled by the hydraulic control system to synchronously and step by step jack up the building laminated slab, and after the building laminated slab is translated to the designed installation position along the translation limit rail, the pressure is synchronously released and the building laminated slab is positioned. The method can realize the accurate and stable installation of the building laminated slab, greatly improves the construction efficiency and the operation safety, reduces the construction cost, and is suitable for the fabricated building construction engineering with limited space.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building construction technology, specifically to a method for stabilizing and translating prefabricated building slabs using a limiting track based on a disc-lock scaffold. Background Technology

[0002] Prefabricated construction is a core direction for the green and industrial transformation and upgrading of my country's construction industry. Precast reinforced concrete composite slabs, as the most commonly used horizontal load-bearing components in prefabricated buildings, directly determine the overall project quality and schedule based on their installation accuracy, construction efficiency, and operational safety. Currently, the on-site installation of composite slabs commonly employs the process of direct hoisting into place using tower cranes. However, in scenarios such as construction on narrow plots in urban core areas, renovation of old residential communities, partial addition of floors within buildings, and blind spots in the tower crane's operating radius, traditional hoisting techniques are limited by space constraints and cannot be implemented normally, becoming a key bottleneck restricting the promotion and application of prefabricated buildings.

[0003] In existing technologies, the installation of composite slabs in areas inaccessible to tower cranes often relies on small mobile lifting equipment combined with manual handling and alignment. This approach has several insurmountable drawbacks: First, the stability of small lifting equipment is poor, easily causing tilting and swaying during the lifting and lowering of composite slabs, resulting in large deviations in installation plane and elevation, high rework rates, and difficulty meeting the high-precision construction requirements of prefabricated buildings. Second, manual handling and alignment at heights are labor-intensive, exposing workers to safety risks such as falling objects and component crushing, leading to a high accident rate. Third, construction efficiency is extremely low, with the installation time for a single composite slab being 2-3 times that of traditional lifting processes, and requiring additional rental of specialized equipment, significantly increasing construction costs and timelines. Therefore, there is an urgent need to develop a composite slab construction method suitable for space-constrained construction scenarios that can achieve precise and stable installation of composite slabs, significantly improve construction efficiency and operational safety, and effectively reduce construction costs, thereby overcoming the aforementioned shortcomings of existing technologies. Summary of the Invention

[0004] The purpose of this invention is to provide a method for stabilizing the translation of a building composite slab using a locking track based on a disc-lock scaffold, in order to solve the problems mentioned in the background art.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] The construction method for stabilizing composite slabs based on disc-lock scaffolding and limiting track translation includes the following steps:

[0007] Step a. Detailed design: Use BIM technology to build an integrated construction model of the building composite slab, conduct collision detection and construction simulation to determine the point coordinates of the disc-lock scaffold and the translation limit track, and output detailed construction drawings;

[0008] Step b. System component fabrication: modular prefabricated disc-lock support rods, I-beam rails, and integrated hydraulic lifting and pulley block translation mechanism;

[0009] Step c. Erection of support frame: Erect a disc-lock scaffold with adjustable top support according to the detailed construction drawings. The bottom of the disc-lock scaffold is anchored to the floor slab with chemical anchors.

[0010] Step d. Installation of translation track: Lay the I-beam track on the adjustable top support of the disc buckle bracket according to the detailed construction drawings to form the translation track, and install the travel limit steel baffle at the end of the translation track to form the translation limit track;

[0011] Step e. Installation of the translation mechanism: Assemble the translation mechanism on the translation limit track and connect it to the hydraulic control system for no-load testing;

[0012] Step f. Precast concrete slab hoisting: Use a four-point hoisting device to hoist the precast concrete slabs onto the translation mechanism for placement;

[0013] Step g. Lifting, translating and positioning of composite slabs: Start the hydraulic control system to control the translation mechanism to lift the building composite slabs to the design elevation in stages, and then translate them along the translation limit track to the design installation position. After that, release the pressure synchronously so that the building composite slabs are positioned on the precast support structure surface.

[0014] Preferably, the BIM modeling accuracy of the integrated construction model of the building composite slab is G4 level.

[0015] Preferably, the disc buckle bracket adopts a φ48 socket-type disc buckle steel pipe bracket, and the verticality deviation of the disc buckle bracket is ≤3‰.

[0016] Preferably, the straightness deviation of the translation limiting track is ≤2mm per 10m, the overall straightness deviation is ≤5mm, and the flatness difference of the track top surface is ≤±3mm.

[0017] Preferably, the thickness of the travel limiting steel baffle is ≥10mm and the height is ≥150mm.

[0018] Preferably, the translation mechanism is symmetrically assembled on the translation limiting tracks on both sides, and the number of translation mechanisms assembled is an even number and not less than 4.

[0019] Preferably, the angle between the sling of the four-point lifting device and the building composite slab during hoisting is ≥60°; the horizontal deviation of the building composite slab resting on the translation mechanism is ≤3mm.

[0020] Preferably, the translation speed is ≤0.5m / min, and sudden stops and starts are prohibited. After the translation reaches the designed installation position, the translation mechanism must be mechanically locked.

[0021] Preferably, the jacking speed of the synchronous graded jacking is ≤10mm / s, and the building composite slab is paused for 50-70mm each time it is jacked to calibrate its levelness; the placement speed of the synchronous depressurization is ≤5mm / s, and the building composite slab is completely depressurized after falling back to a position 10-15mm away from the prefabricated support structure surface to verify the designed installation position.

[0022] Compared with existing technologies, this invention effectively solves the technical problems of insufficient installation accuracy, high rework rate, high labor intensity at height, prominent safety risks, low construction efficiency, and high overall cost in traditional composite slab installation processes in space-constrained scenarios. This invention utilizes high-precision BIM technology for pre-design, eliminating component interference and construction conflicts in advance. Combined with a translation track with end-limiting mechanisms, it achieves directional, offset-free transport of the building composite slab. Hydraulic synchronous graded lifting and step-by-step pressure relief technology ensures stable operation of the composite slab throughout the process. After placement, mechanical locking and reinforcement completely eliminate displacement risks caused by pouring vibrations, significantly improving the installation accuracy and project quality of the building composite slab. An integrated mechanized translation mechanism replaces traditional manual high-altitude handling and alignment operations, reducing the labor intensity of workers. Simultaneously, through bottom anchoring of the disc-locked bracket, frame stability control, and full-range track limiting, this invention further enhances the composite slab installation process. The hydraulic system features multiple safety protection measures with stroke locking, effectively preventing accidents such as component tilting and falling, fundamentally improving operational safety. Modular prefabrication and rapid assembly processes ensure seamless connection between various procedures, significantly improving construction efficiency, drastically shortening the construction period, reducing material waste, and eliminating the need for additional rental of specialized hoisting equipment, effectively controlling overall construction costs. The disc-locking support system is highly versatile and can flexibly adapt to the modular requirements of different construction sites. The overall construction system is not limited by space and is widely applicable to various special construction scenarios where traditional hoisting techniques cannot be implemented, filling a gap in existing technology. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 This is a flowchart illustrating the steps of the construction method for stabilizing and positioning composite slabs based on disc-lock brackets.

[0025] Figure 2 This is a schematic diagram of the overall system component layout of the construction method for stabilizing and positioning composite slabs based on disc-lock brackets.

[0026] Figure 3This is a schematic diagram of the on-site construction process of the building composite slab being lifted and moved along the translation limit track according to the present invention. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0028] Please see Figure 1 As shown, this invention is a construction method for stabilizing and positioning precast composite slabs using a modular support system and a lateral positioning track. The construction process is roughly as follows: First, BIM technology is used to complete the detailed design and output detailed construction drawings; then, all system components are prefabricated modularly; subsequently, a modular support system is erected according to the detailed construction drawings, and the lateral positioning track is installed; next, the lateral mechanism is assembled and a no-load test is completed; then, the precast composite slab is hoisted onto the lateral mechanism; finally, the hydraulic control system controls the synchronous lifting, lateral movement, and positioning of the precast composite slab to complete the installation. Specifically, this construction method includes the following steps:

[0029] Step a. Detailed Design: Based on the "Unified Standard for Building Information Modeling Application" GB / T51212-2016, a BIM technology-based integrated construction model of the building composite slab, including the building structure, modular support system, translation limit track, and translation mechanism, is constructed. The BIM modeling accuracy of the integrated construction model of the building composite slab must reach G4 level. Based on this integrated construction model of the building composite slab, comprehensive collision detection is carried out to eliminate potential hazards such as component interference and pipeline conflicts. Full-process construction simulation is performed, and the blind spot operation path of the tower crane and the connection of construction procedures are optimized. Through simulation calculations, the point coordinates of each upright of the modular support, the axial position and elevation of the translation limit track are determined, and detailed construction drawings are output to guide on-site construction.

[0030] Step b. System component fabrication: According to the detailed construction drawings, all system components are prefabricated in a modular manner. Among them, the disc-locking bracket members include φ48 socket-type uprights, standard horizontal bars, telescopic horizontal bars, diagonal braces, and adjustable top supports; the translation track is prefabricated in sections according to the design length using No. 12 hot-rolled I-beams; the translation mechanism integrates hydraulic jacking components and pulley blocks, and prefabricates T-channel steel wheels, pulley jacks, electro-hydraulic jacks, 6×250×250mm load-bearing steel plates, and 2×250×250mm rubber anti-slip pads. After all system components are fabricated, quality inspection is carried out, and those that pass the inspection are classified and stored for later use.

[0031] Step c. Support frame erection: Please refer to the following: Figure 2As shown, the layout and positioning are carried out according to the detailed construction drawings. The disc-lock scaffolding is then installed, and the uprights and base bars of the disc-lock scaffolding base are erected in sequence. The uprights, horizontal bars, and diagonal braces are assembled layer by layer. The disc-lock scaffolding is erected according to a 900mm×900mm module, and the horizontal bar spacing is uniformly 1500mm. For corner parts where the module does not match, telescopic horizontal bars are used to replace the standard horizontal bars for adaptation. At the same time, an adjustable top support is installed on the top of the disc-lock scaffolding. During the erection of the disc-lock scaffolding, diagonal braces are used for horizontal and vertical connection to enhance the overall stability of the disc-lock scaffolding. The bottom of the disc-lock scaffolding is firmly anchored to the chemical anchors and the lower floor slab through four-hole connecting plates. No less than two chemical anchors are installed at the bottom of each upright. After the disc-lock scaffolding is erected, a total station is used to check the overall verticality of the scaffolding. The verticality deviation of the scaffolding is controlled to be ≤3‰. The disc-lock scaffolding is erected and inspected in sections. Only after the sections pass the inspection can it be transferred to the next process of moving the track installation.

[0032] Step d. Installation of the translation track: Use a total station to accurately lay out the axis of the translation limit track. Use a level to verify the elevation of the top support surface of the adjustable top support. The flatness difference of the top support surface must be controlled within ±2mm. Use steel shims to precisely level any uneven areas. Lay the prefabricated No. 12 hot-rolled I-beam track on the adjustable top support. Weld the I-beam track to the top support surface of the adjustable top support. Use bevel butt welding between the I-beam tracks. After welding, remove the weld slag and grind it smooth to form the translation track. Install the translation track at both ends. The travel limit steel baffle is made of steel plate with a thickness of ≥10mm and a height of ≥150mm, forming a translation limit track to prevent the translation mechanism from derailing. The installation accuracy of the translation limit track is monitored by both a laser rangefinder and a level throughout the entire process to ensure that the straightness deviation of the translation limit track is ≤2mm for every 10m, the straightness deviation of the entire length is ≤5mm, and the flatness difference of the track top surface is ≤±3mm. After the translation limit track is installed, a no-load sliding test is conducted. The pulley block is free from jamming and deviation throughout the entire process. Only after passing the test can the next process of installing the translation mechanism begin.

[0033] Step e. Installation of the translation mechanism: Please refer to the following: Figure 2As shown, the prefabricated translation mechanism is symmetrically assembled on the translation limiting rails on both sides. The number of translation mechanisms assembled is even and no less than 4. Each translation mechanism contains 4 T-channel steel wheels. Each T-channel steel wheel of a translation mechanism is connected by a pulley jack to form a stable bearing unit. An electro-hydraulic jack is fixedly installed on the pulley jack connection mechanism with bolts. A 6×250×250mm bearing steel plate is welded to the top of the electro-hydraulic jack. A 2×250×250mm rubber anti-slip pad is pasted on the surface of the bearing steel plate to increase the friction with the building composite slab. After the translation mechanism is installed, the hydraulic control system is connected, and a no-load test run is conducted to verify that the gap between the pulley block and the translation limiting rail is between 1-3mm, ensuring that the synchronous graded lifting and limiting translation functions are normal.

[0034] Step f. Lifting of composite slabs: Use a four-point lifting device to lift the composite slabs. The angle between the slings and the composite slabs should be ≥60°. The lifting point positions must be strictly set according to the design markings and must not be changed arbitrarily. First, slowly lift the composite slabs to 300mm above the ground for a trial lift. After confirming that there are no abnormalities, lift them at a constant speed to 500mm above the working layer and stop. Align the installation edge line with the laser positioning device, and then slowly lower the composite slabs at a speed of 50mm / s. When the composite slabs are 50mm away from the bearing surface of the translation mechanism, fine-tune the position of the composite slabs to ensure that they are stably placed on the bearing surface of the translation mechanism. The horizontal deviation of the composite slabs placed on the translation mechanism must be controlled within ≤3mm. Remove the lifting device after the composite slabs are temporarily placed stably.

[0035] Step g: Lifting, translating, and positioning of the composite slab: Please refer to the following: Figure 3 As shown, the hydraulic control system is activated to control all translation mechanisms to synchronously and progressively lift the building composite slabs. Before synchronous and progressive lifting, the hydraulic oil level is checked to be ≥2 / 3 of the tank volume, and the oil temperature is between 10℃ and 60℃. During synchronous and progressive lifting, the lifting speed is controlled to be within 10mm / s. A progressive lifting method is adopted, pausing for 3 seconds every 50-70mm to calibrate the levelness of the building composite slab, ensuring that the levelness deviation is ≤3mm. When the slab is lifted to 30mm above the precast support structure surface, it is stopped immediately. After laser calibration confirms that the position is correct, it is ready for translation. The translation speed of the building composite slab on the translation limit track is controlled at... Move at a constant and smooth speed within 0.5m / min, and prohibit sudden stops and starts. After the building composite slab is moved to the designed installation position, immediately cut off the translation power supply and use a mechanical device to rigidly lock the translation mechanism to the translation limit track to prevent it from slipping on the translation limit track. When placing it in position, start the hydraulic control system to slowly release pressure, and control the placement speed within 5mm / s. Use a step-by-step pressure release placement method: first, lower the building composite slab back to 10-15mm away from the precast support structure surface, pause to check the designed installation position, and after confirming that it is correct, release the pressure completely so that the building composite slab is placed smoothly on the precast support structure surface.

[0036] This embodiment takes a prefabricated residential project on a narrow plot in the core area of ​​a city as an example. The project requires the installation of 200 prefabricated reinforced concrete composite slabs with a size of 3.6m×2.4m. The construction area is within the blind spot of the tower crane's operating radius. Compared with the traditional construction method of using small lifting equipment and manual handling, the construction method described above in this invention has achieved significant economic benefits, as shown in Table 1 below.

[0037] Table 1:

[0038]

[0039] As shown in Table 1, the construction method of this invention saved a total of RMB 221,400 in construction costs in this project, while significantly reducing the safety risks of high-altitude operations and significantly improving the quality of the project.

[0040] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions of some of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A construction method for stabilizing composite slabs by limiting track translation based on disc-lock scaffolding, characterized in that, Includes the following steps: Step a. Detailed design: Use BIM technology to build an integrated construction model of the building composite slab, conduct collision detection and construction simulation to determine the point coordinates of the disc-lock scaffold and the translation limit track, and output detailed construction drawings; Step b. System component fabrication: modular prefabricated disc-lock support rods, I-beam rails, and integrated hydraulic lifting and pulley block translation mechanism; Step c. Erection of support frame: Erect a disc-lock scaffold with adjustable top support according to the detailed construction drawings. The bottom of the disc-lock scaffold is anchored to the floor slab with chemical anchors. Step d. Installation of translation track: Lay the I-beam track on the adjustable top support of the disc buckle bracket according to the detailed construction drawings to form the translation track, and install the travel limit steel baffle at the end of the translation track to form the translation limit track; Step e. Installation of the translation mechanism: Assemble the translation mechanism on the translation limit track and connect it to the hydraulic control system for no-load testing; Step f. Precast concrete slab hoisting: Use a four-point hoisting device to hoist the precast concrete slabs onto the translation mechanism for placement; Step g. Lifting, translating and positioning of composite slabs: Start the hydraulic control system to control the translation mechanism to lift the building composite slabs to the design elevation in stages, and then translate them along the translation limit track to the design installation position. After that, release the pressure synchronously so that the building composite slabs are positioned on the precast support structure surface.

2. The construction method for stabilizing and positioning composite slabs based on disc-lock scaffolding for track translation according to claim 1, characterized in that, The BIM modeling accuracy of the integrated construction model of the building composite slab is G4 level.

3. The construction method for stabilizing and positioning composite slabs based on disc-lock scaffolding for track translation according to claim 1, characterized in that, The disc-lock bracket adopts a φ48 socket-type disc-lock steel pipe bracket, and the verticality deviation of the disc-lock bracket is ≤3‰.

4. The construction method for stabilizing and positioning composite slabs based on disc-lock scaffolding for track translation according to claim 1, characterized in that, The straightness deviation of the translation limit track is ≤2mm for every 10m, the straightness deviation of the entire length is ≤5mm, and the flatness difference of the track top surface is ≤±3mm.

5. The construction method for stabilizing and positioning composite slabs based on disc-lock scaffolding for track translation according to claim 1, characterized in that, The thickness of the travel limit steel baffle is ≥10mm and the height is ≥150mm.

6. The construction method for stabilizing and positioning composite slabs based on disc-lock scaffolding for track translation according to claim 1, characterized in that, The translation mechanism needs to be symmetrically assembled on the translation limit tracks on both sides, and the number of translation mechanisms assembled must be an even number and no less than 4.

7. The construction method for stabilizing and positioning composite slabs based on disc-lock scaffolding for track translation according to claim 1, characterized in that, The angle between the slings of the four-point lifting device and the building composite slab during the hoisting process is ≥60°; the horizontal deviation of the building composite slab resting on the translation mechanism is ≤3mm.

8. The construction method for stabilizing and positioning composite slabs based on disc-lock scaffolding for track translation according to claim 1, characterized in that, The translation speed is ≤0.5m / min, and sudden stops and starts are prohibited. After the translation reaches the designed installation position, the translation mechanism must be mechanically locked.

9. The construction method for stabilizing and positioning composite slabs based on disc-lock scaffolding for track translation according to claim 1, characterized in that, The synchronous graded jacking speed is ≤10mm / s, and the building composite slab is paused for 50-70mm each time it is jacked to calibrate its levelness; the synchronous depressurization placement speed is ≤5mm / s, and the building composite slab is completely depressurized after falling back to a position 10-15mm away from the prefabricated support structure surface to verify the designed installation position.

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