中文
Assembled commercial concrete structures have been widely used in various countries in the world since 1950s because of their advantages of fast construction speed, labor saving, good quality of prefabricated components and good cost performance. In recent years, due to environmental protection, energy saving and emission reduction requirements and labor price rising factors, the technology development and progress of assembled commercial concrete structures have been further promoted.
_In recent years, technological advances are mainly reflected in two aspects: first, with the development of new concepts equivalent to cast-in-situ commercial concrete structure, and the emergence of new connection technologies such as sleeve grouting connection technology and grouting-anchor overlapping connection technology, modern assembled monolithic commercial concrete structure can have the same integrity as cast-in-situ commercial concrete structure. Body performance, seismic performance and durability; secondly, with the considerable progress of construction equipment and technology such as hoisting equipment, construction support system, large crane and transport vehicle, modern assembled commercial concrete structure further realizes the goal of improving quality, improving efficiency and reducing cost of industrial buildings.
_On the basis of the combination of prefabricated and cast-in-place commercial concrete technology, the defects of rigid shape and monotonous facade of the previous generation of fully assembled large-slab residential buildings have been completely overcome. The architectural design of modern assembled commercial concrete structure can realize the diversification of building plane through different plane combination on the basis of various standardized modules and satisfying the building function. At the same time, it can realize the diversification of elevation through the change of facing material, color and texture. In fact, due to the plasticity of commercial concrete and the improvement of prefabricated component technology, the complex components of modern assembled commercial concrete structure are easier to form in factories than in sites, and easier to control quality. Therefore, in developed countries, architects tend to choose prefabricated components for the complex facades of many buildings.
In recent years, all kinds of lightweight, high efficiency thermal insulation materials and waterproofing materials with good durability have been widely used in the construction industry of our country. The application of these new materials in modern assembled commercial concrete structures has basically overcome the problems caused by seepage, leakage, cracking and cold of the previous generation of fully assembled slab residential buildings. Modern assembled commercial concrete structure, because of its great improvement in manufacturing accuracy, construction deviation of door and window openings can be measured in millimeters. At the same time, combined with the use of high-performance waterproof materials, it effectively solves the problem of water seepage in door and window openings with the highest complaint rate among residents. It also provides the use of standardized door and window products, an important part of the industrial chain of construction. At the same time, the quality of indoor environment is improved.
_For more than 60 years, the road of assembled commercial concrete structure in developed countries has proved that with the popularization and use of high-strength, high-performance commercial concrete and steel bar in assembled commercial concrete structure, prefabricated components will achieve high-quality advantages through maintenance and manufacture in factories, thus further improving the quality and service life of modern assembled commercial concrete structure. It can be widely used in buildings whose service life is more than 100 years. The combination of prefabricated components and prestressing technology, steel components, shock-free and shock-absorbing technology makes modern assembled commercial concrete structures more widely used in residential buildings, public buildings and factory buildings.