Why is the higher the assembly rate, the higher the incremental cost?

On the one hand, the assembled technical standards and technical system still need to be improved, on the other hand, the engineering cost of the assembled construction method is high. According to the actual engineering calculation, compared with the traditional cast-in-place building, the cost of assembled building at this stage is at least higher than 200 yuan /m2, and the higher the assembly rate, the higher the incremental cost. The state and local governments have successively issued various preferential policies to vigorously promote the development of prefabricated buildings.

Assembled building adopts assembled integral shear wall structure system, horizontal connection between precast shear wall plates adopts cast-in-situ reserved horizontal protruding steel bars, and vertical steel bar connection adopts sleeve grouting technology.

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In the process of construction, the field installation of assembled concrete structure is one of the key and difficult points of the whole project. Due to the particularity of the construction site, there are many kinds of components, which is of great significance to the effective management of the construction site.

Judging from the actual situation in China, there are many problems in management, such as the nonstandard transportation and stacking of components, the high risk of component hoisting, the high risk of temporary support for on-site component installation, the high difficulty of waterproof prefabricated external wall panels, the high difficulty of component assembly and positioning, and the high risk of construction safety. ?

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