A three
hundred square meters of three-story residential building how long can
be built? In Japan, its answer is a week. In fact, not just
single-family homes, that is, high-rise, high-rise buildings, the same
can be built at such a rate.
The realization of such a rapid
construction of the building, and Japan's housing industry has a high
degree of close contact, especially with the building prefabricated
structure (PCa) has a direct relationship.
Japan: 60 years of application experience
"At
present, Japan's PCa technology has been developed to the third
generation, in the high-rise, high-rise buildings can be applied. Japan
PCa technology development has been the first two generations of basic
technology and application of technology to the current development of
the technology , Focusing on isolation and high-strength materials and
other fields of research and application. "On March 18 China Building
Standards Design Institute hosted the sustainable construction and
housing industry technology forum, the Japanese Ministry of Land and
Transportation JICA project experts, Japan's structure from the
architect of three bottles of introduction, Japan from the 1950s due to
labor shortage began to develop PCa technology, as of today, there are
many types, which prefabricated concrete construction method is the most
important, including wall prefabricated reinforced concrete
construction method WPC, WRPC) and frame prefabricated reinforced
concrete construction (RPC, HPC). Three bottles of Zhao Yan WPC
construction method as an example that the technology because the
external walls or partitions as a load-bearing wall, so more reasonable
and economical. At the same time, column or beam type is not indoors,
can effectively use the living space. In addition, due to the high
pre-manufacturing rate, can significantly shorten the duration.
Three bottles of Zhao Yan stressed that there is a little more
important, the use of PCa construction method of the size of the better
precision, durability, and the quality of related components is also
better.
"In addition, the use of PCa construction method of labor
compared with the traditional construction method: the overall amount of
labor for the traditional 62%; compared with the main structure of the
construction, wall painting work more effort; Effort is also a great
effect. "Three bottles of Zhao Yan said.
Although the PCa
construction method compared with the traditional construction method of
the initial high cost, but as long as a certain scale, the cost of
investment will be greatly reduced with the use of the expansion.
China: will usher in a big development situation
China
Building Standard Design and Research Institute executive director Liu
Dongwei that the use of PCa technology not only high labor costs in
Japan has a very attractive, China also has the need to increase efforts
to promote. "Whether it is as a solution to the lack of large - scale
housing construction measures, or as the construction industry from the
original handicraft production mode of modernization, residential
industrialization is the only way.
At
present, China has developed a very good momentum in the development of
residential industrialization. Shenzhen from November 1, 2009 onwards
since the implementation of the country's first prefabricated technology
specifications - "prefabricated assembly of reinforced concrete
structure technical standards."
In fact, there are already some
companies in the front. Heilongjiang Yuhui Group as early as a few years
ago in the development of the Locke town project on the 14th floor, the
use of prefabricated integrated concrete shear wall structure
technology. "All the structural components on the 14th floor are
prefabricated in the factory, and then transported to the site assembly
construction. Currently, the basic elimination of the wall common
leakage, cracking, hollowing, room size deviation and other quality
problems, To achieve the main structure of the accuracy of the deviation
in millimeters, the deviation is basically less than 0.1%. "Yuhui Group
Chairman Liu Wenqing said.
Housing and Urban and Rural Construction
Department of Housing Industry Promotion Center Technology and Products
Director Ye Ming pointed out that the housing industry in addition to
Vanke in the positive promotion, the Yuhui Group, South China
Construction, Changsha longevity, Nanjing, Shanghai, Group and other
enterprises have entered the ranks of the. Especially in the labor costs
and building quality requirements to enhance the market competition
intensified in the context of China's construction enterprises have
begun to pay close attention to the development process of residential
industrialization.