Take a look at the difficult problems of prefabricated building steel structure

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take a lookprefabricated buildingDifficult problems of steel construction

1. Construction drawing design phase link

  prefabricated buildingSteel structure has the advantages of large-scale production and processing, mechanical automation on the spot installation, but because the level of standardization and modularization at this stage is not too high, resulting in more production operations and reducing the efficiency of engineering construction. At this stage, the steel structure standard of prefabricated buildings is mainly programmatic documents, but also the design side, construction enterprises and other aspects to optimize.

In the process of engineering construction drawing design, due to insufficient communication between interior designers and construction enterprises, the specific addresses of embedded parts such as some small and medium-sized metal structures and prefabricated components for connection decoration design are incorrect or missing, resulting in problems such as water leakage caused by drilling holes on the spot at the end of the project.

In the construction drawing design link generally includes the main project and attached lifting structure, construction drawing design usually attaches great importance to the main beam, column, etc., then as an attached structure such as fixed plate, reinforced plate design is not taken seriously, the occurrence of compressive strength, deformation check calculation lack or even omission to consider the situation. In addition, the whole process of lifting on the spot should have considered the bearing capacity size and position of the hook, but it is often unscientific or lacking due to lack of communication.

In the design of mechanical equipment and pipeline construction drawings, due to insufficient coordination among various disciplines, some problems such as drop and pipeline exposure are embedded in some pipe grooves.

2. Envelope system

(1) Multi-ribbed floor management system

At this stage, inprefabricated buildingIn the steel system, the pressure plate composite floor, concrete precast composite floor, self-supporting building steel truss floor, etc. are generally used. The composite floor slab of the profiled plate can reduce the template and the thickness of the concrete of the floor slab, but the fire resistance is poor and the bottom mold is not leveled. It is usually necessary to upgrade the decoration ceiling and endanger the application of indoor space. The precast concrete composite floor slab is divided into prefabricated component layer and cast-in-situ composite layer, which does not need formwork support and has a short construction period. However, the prefabricated component layer is relatively thin and is prone to many problems such as cracking and crevices during the construction phase.

The self-supporting steel bar truss floor slab is a composite pressure slab that processes the steel bar at the bottom of the floor slab into a truss structure and connects it with the bottom mold into an integrated structure. Compared with the composite floor slab, the workload of on-site steel bar connection is reduced. Compared with the precast concrete composite floor, it can be trusted in transportation. The self-supporting building steel truss floor bearing plate is paved with floor slab after the steel structure is assembled, and then concrete is poured, which belongs to the floor slab composed of pressure plate without supporting point. However, in the specific construction, usually because the span of the structure is relatively large, you can raise a support point, but when the stability of the independent support is weak, the building height is large, it can not meet the reliability requirements, to carry out other pulling, enhance the accompanying process and expenses.