CN-121981418-A - Large-space air duct prefabrication modularized rapid assembly construction method

CN121981418ACN 121981418 ACN121981418 ACN 121981418ACN-121981418-A

Abstract

The invention discloses a large-space air duct prefabrication modularized rapid assembly construction method, which particularly relates to the technical field of building engineering construction, and comprises the following steps of S1, digital design and modularized planning; S2, industrial intelligent prefabrication production, S3, on-site accurate measurement and positioning, S4, standardized installation of a support and a hanger, and S5, rapid assembly of an air pipe module. According to the invention, through the closed loop of BIM model, 4D construction simulation and self-adaptive adjustment, static design is updated to dynamic adjustable intelligent planning, collision is avoided in the design stage, site change can be actively adapted in the construction stage, the primary construction qualification rate is greatly improved, reworking caused by design change and site error is reduced, accurate, stable and efficient hoisting of an air pipe module is realized, the workload of high-altitude manual assembly is reduced, the overturning risk in the hoisting process is avoided, and the safety and hoisting efficiency are improved.

Inventors

PENG ZHIWEI
WANG LIJUN
HUANG RONG
ZHAO RUIQIANG
WANG CHAOYANG
YANG LIU
ZHANG TIAN
Lu Kangyu

Assignees

山西七建集团有限公司

Dates

Publication Date: 20260505
Application Date: 20251128

Claims (10)

1. The large-space air duct prefabrication modularized rapid assembly construction method is characterized by comprising the following steps of: s1, digital design and modularized planning, namely constructing a comprehensive model comprising a building, a structure and electromechanical pipelines based on a building information model BIM, carrying out space partition and modularized division on an air duct system according to a factory building structure column net and equipment layout to form a standard module and a non-standard module, and carrying out multi-professional collaborative design and collision detection; S2, factory intelligent prefabrication production, namely directly importing BIM design data processed in the S1 into a computer-aided manufacturing CAM system of a factory, driving a numerical control cutting device, an automatic seaming machine and a closing machine to finish accurate blanking, forming and assembling of the air duct plate, and endowing each prefabricated air duct module with a unique identity code; S3, accurate on-site measurement and positioning, namely acquiring actual point cloud data of a construction site by using a three-dimensional laser scanning technology before construction and installation, comparing and rechecking with a BIM design model, and accurately determining the installation position of the support and hanger and the installation reference of the air duct module; S4, standard installation of the support and hanger, namely, based on BIM model of S1 and on-site rechecking data of S3, carrying out support and hanger selection, arrangement and stress analysis, and adopting factory prefabricated standard support and hanger components for quick assembly and installation; S5, rapidly assembling the air duct module, namely sequentially hoisting the air duct module to a design position by using special hoisting equipment according to the division and the number of the modules, and rapidly butting and sealing by adopting standardized connecting pieces to complete the assembly of the whole air duct system.
2. The method for quickly assembling and constructing prefabricated large-space air pipes is characterized in that in S1, modular division is specifically performed by taking a factory building structural column net as a reference, an air pipe system is divided into a plurality of standard section modules with equal length in the length direction, and the standard section modules are divided into non-standard section modules at space turning, reducing or connecting positions with equipment, wherein the length of each standard section module is 6 meters, and the weight of a single piece is not more than 200 kg.
3. The method for quickly assembling prefabricated modules of large-space air duct according to claim 2, wherein S1 further comprises constructing a 4D construction simulation model based on a construction progress plan after module division is completed, wherein the 4D construction simulation model is used for simulating and optimizing transportation and hoisting sequences of air duct modules and construction connection with civil engineering and other electromechanical professions.
4. The method for quickly assembling and constructing the prefabricated large-space air duct according to claim 1, wherein the step S2 of the industrial intelligent prefabricated production further comprises the steps of performing full-scale welding or intermittent welding at a closed joint of the air duct module by adopting a welding robot, and spraying a nanoscale photocatalytic antibacterial coating inside the air duct module.
5. The method for modular rapid assembly and construction of large-space air duct prefabrication according to claim 1, wherein in S3, after site point cloud data are acquired, when the deviation between a site actual structure and a design model exceeds a preset threshold, an adaptive adjustment algorithm is started in a BIM model, the sizes of affected adjacent air duct modules are automatically adjusted and updated, and new processing data are generated for guiding the supplementary prefabrication of local components.
6. The method for constructing the prefabricated modular rapid assembly of the large-space air duct of claim 1, wherein the S4 support and hanger is an assembled composite vibration reduction support and hanger and comprises a through wire hanger rod, a vibration reduction spring, a profile steel cross beam and a high polymer composite material strap for wrapping the air duct, wherein the through wire hanger rod, the vibration reduction spring and the profile steel cross beam are connected with a structural top plate.
7. The method for constructing the prefabricated modular rapid assembly of the large-space air duct of claim 1, wherein the standardized connecting piece in S5 is a double-sealing flange system, and the standardized connecting piece comprises a nominal flange frame and an air duct module which are integrally formed, a rubber airtight strip arranged on the abutting surface of the flange frame, and flame-retardant sealant which is injected into the cavity in the flange frame from the outside after the modules are abutted.
8. The method for rapid assembly and construction of large-space air duct prefabrication modules according to claim 1, wherein the special hoisting equipment in S5 is a movable modularized hoisting portal frame which is arranged in a workshop in a crossing manner, and an electric hoist capable of moving transversely and longitudinally is arranged on the portal frame and used for carrying out multipoint balanced hoisting on air duct modules.
9. The method for quickly assembling and constructing the prefabricated large-space air duct is characterized in that a wireless inclination sensor is arranged on a lifting point of an air duct module in the lifting process and used for monitoring the gesture of the module in real time, and the electric hoist is synchronously adjusted according to data fed back by the wireless inclination sensor and used for dynamically leveling the air duct module.
10. The method for constructing the prefabricated modular rapid assembly of the large-space air duct of claim 1, wherein after the S5 air duct system is assembled, the unmanned aerial vehicle-mounted thermal infrared imager is used for cruising scanning the finished air duct system, and the problem of air tightness defect or insulation layer missing is located by detecting the abnormal temperature point.

Description

Large-space air duct prefabrication modularized rapid assembly construction method Technical Field The invention relates to the technical field of building engineering construction, in particular to a large-space air duct prefabrication modularized rapid assembly construction method. Background Along with the acceleration of the industrialization and town process in China, the construction of industrial plants shows an obvious trend of developing to a high and large space direction, and the plants are generally high in layer height (most of the plants exceed 8 meters), large in span (more than 30 meters are common), wide in space and capable of providing sufficient operation space for production process flows, however, the building characteristics also bring unprecedented challenges to the installation of ventilation and air-conditioning systems. Along with the rapid development of industrial plants to high and large spaces and large spans, the matched ventilation and air conditioning air duct system also has the characteristics of huge scale and complex layout, and the traditional air duct construction method mainly depends on discrete operation modes of field measurement, field processing and field installation, is difficult to adapt in the industrial plants with large spaces, and exposes a plurality of technical bottlenecks to be solved urgently: Firstly, a traditional two-dimensional drawing is difficult to cope with a complex scene of multi-specialty pipeline intersection, although some projects adopt BIM technology to carry out three-dimensional design, the traditional two-dimensional drawing stays in static 'turning over mode' and 'displaying' stages, cannot be fused with construction progress and resource allocation depth, a design model is disjointed with on-site dynamic construction, cannot be adaptively adjusted according to civil errors, and cannot be installed after a prefabricated part arrives at the site, so that reworking and waste are caused; Secondly, the existing prefabrication assembly technology is concentrated on factory production of standard alignment pipe sections, and for non-standard components, connection nodes, supporting and hanging frames and the like, on-site manual processing is still relied on, the automation and intellectualization level of factory production links is not high, and particularly on fine operations such as welding, internal processing and the like, the quality stability is difficult to ensure, and the production in the true sense cannot be realized; Meanwhile, the field installation still takes the manual experience and simple machinery as the main materials, and the positioning and lofting efficiency of the support and the hanger is low and the error is large; In addition, the traditional construction management depends on a cross road map or a network map, the progress plan based on two-dimensional lines and the three-dimensional space design model are fractured, and it is difficult for a manager to intuitively predict whether the hoisting path of the air pipe module can collide with moving large equipment, temporary scaffolds or other professional working procedures in space or time at a specific time point and in a specific construction area, and the 'space-time collision' is an important cause for causing site shutdown, construction and unsmooth working procedure connection. Therefore, there is an urgent need in the art for a rapid assembly construction method for prefabricating large-space air duct, which can penetrate through the whole process of design, production, assembly and detection, and is capable of deeply fusing informatization, automation and intellectualization technologies, so as to systematically solve the above problems. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides a large-space air duct prefabrication modularized rapid assembly construction method. In order to achieve the purpose, the invention provides the following technical scheme that the large-space air duct prefabrication modularized rapid assembly construction method comprises the following steps: s1, digital design and modularized planning, namely constructing a comprehensive model comprising a building, a structure and electromechanical pipelines based on a building information model BIM, carrying out space partition and modularized division on an air duct system according to a factory building structure column net and equipment layout to form a standard module and a non-standard module, and carrying out multi-professional collaborative design and collision detection; S2, factory intelligent prefabrication production, namely directly importing BIM design data processed in the S1 into a computer-aided manufacturing CAM system of a factory, driving a numerical control cutting device, an automatic seaming machine and a closing machine to finish accurate blanking, forming and assembling of the air duct plate, and endowing each pr