Introduction to “advanced, mature and applicable new technology” of precast buildings – Integrated reinforced concrete structure system of
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1 Composition of pi system (a) wall column connection node (b) beam end anchorage node Fig.
2 # node diagram Fig.
The installation and connection are convenient, which greatly improves the construction efficiency.
Scope of application according to the technical specification for cage formwork assembled integral concrete structures (DBJ / t15-203) and technical specification for formwork free assembly integrated reinforced concrete structures of Guangdong Province, the formwork free assembly integrated reinforced concrete structure system is applicable to frame structures, frame shear wall structures, shear wall structures, partial frame supported shear wall structures, tube structures, etc.
This issue introduces the integrated reinforced concrete structure system without formwork assembly.
Technical advantages 1 The vertical component reinforcement adopts the overlapping mode, which is consistent with the connection mode of cast-in-situ concrete reinforcement.
The main structure can realize one floor in three days, and the total construction period can be shortened to 1 / 2 of the cast-in-situ structure.
suitable for non seismic design and seismic design in areas with seismic design intensity of 6 or above Slab column shear wall structure and other multi-storey, high-rise and super high-rise reinforced concrete structures.
Editor: Cao Xiaoran reviewed by: Ma binya source: Construction Industry Modernization Development Committee of China Architectural Society (welcome).
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It is suitable for various structural systems and multi-storey, high-rise and super high-rise structures.
1 Technical content: the integrated reinforced concrete structure system without formwork assembly (hereinafter referred to as pi system) is a concrete structure formed by integrating the formwork of structural components and reinforcement cage into self balanced cage formwork precast parts in the factory, hoisting at the construction site and pouring concrete at one time.
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3 # wall PC precast component and wall PI cage formwork section 2 Technical indicators the PI technical industry and local standards and specifications that have been released at present include: China CECS standard technical specification for the application of formed grid stirrups, China CECS standard technical specification for integrated reinforced concrete structure without formwork assembly, and Guangdong provincial standard technical specification for integral reinforced concrete structure with cage formwork assembly.
Project example 1.0 demonstration building and Foshan poly Zishan residence project.
According to the new technology achievements submitted by enterprises, the construction industry modernization development committee of China Architectural Society, after consulting experts, has launched 21 advanced, mature and applicable new technologies, edited and formed the compilation of “advanced, mature and applicable new technologies” for precast buildings (the first batch), which can be used for reference, promotion and application by member units and enterprises in the industry.
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The system has the advantages of high degree of industrialization, good overall safety of structure, low cost, good quality and fast progress.
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Most of the work is completed through automatic production lines and industrial robots, which are green, energy-saving, material saving, environmental protection and emission reduction.
The integrated reinforcement cage formwork bears the construction load through the self balancing system, which greatly simplifies the construction support.
The formwork adopts reinforced concrete thin plate with the same strength grade as the structure, which is not removed after the construction is completed and integrated with the main structure.
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Recommended unit: Guangzhou Ronglian Construction Technology Co., Ltd.
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The precast cage formwork components form a self balancing and stable system after on-site installation, which can independently bear the construction load, greatly reduce the construction support, and enhance the construction safety and convenience.
The weight of precast cage formwork components is light, only about 30% of the traditional precast components, which is convenient for transportation and installation.
Pi system is a new building industrialization system.
21 new technologies are introduced in detail by stages.
The structure has good integrity, and the performance and safety are completely consistent with the cast-in-place structure.
At the same time, it has the outstanding characteristics of no construction formwork and no construction waste.
