Construction Precast Development
Precast News From China
conpd0523 
In renovation and reinforcement projects, it is common to encounter the situation of adding new floor slabs.
Below are the detailed drawings of the connection between the newly added floor slabs and the newly added cantilever slabs in concrete structures.
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All resources provided by the regulatory think tank are collected online or for non-commercial exchange and learning purposes!.
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Construction personnel must undergo safety education upon entering the site, and can only enter the construction site after passing the assessment;.
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The production task order is the original record reflecting the practical production status of the concrete mixing plant.
It is an instruction book that arranges and directs the production of the company, and is the basis for detailed implementation of production effects.
It must be strictly handled according to procedures.
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The current cracking risk assessment mainly relies on the coupled simulation technology of temperature field and stress field.
Li Fazhang et al.
used MIDASFEA software to simulate the temperature spatiotemporal distribution of the bottom plate of Xijin Ship Lock under different molding temperatures and layer thicknesses.
Combined with the constrained stress model, they quantified the cracking risk and proved that reducing the molding temperature (better than adjusting the layer thickness) is the key to controlling cracks.
Liu Yi and others proposed intelligent monitoring technology, which constructs a predictive model by collecting real-time temperature data to achieve dynamic warning and regulation.
After comparing traditional models, Tong Liyong and others developed a new prediction model with stable error (<0.
15), providing a new tool for quality supervision of large volume concrete.
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Like other commodities, the performance of concrete is influenced by raw materials.
Only by controlling the quality of concrete raw materials and utilizing them reasonably can we obtain high-performance and low-cost concrete.
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The multifunctional platform for tunnel lining concrete curing can simultaneously take into account concrete curing, concrete testing and repair, and cleaning and maintenance of embedded parts.
The use of its automatic sprinkler system for curing concrete, as well as the use of a platform for inspection and repair of concrete, cleaning and maintenance of embedded parts, has the characteristics of strong applicability, easy operation, high efficiency, good curing effect, high safety, and reduced labor.
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Colleagues who have worked on renovation and reinforcement projects should have seen early concrete structure construction drawings, where detailed drawings of each beam were required, resulting in extremely low work efficiency.
Nowadays, concrete structure construction drawings adopt the architectural structure construction drawing plane integral representation method (referred to as “plane method”).
The expression form of plane method is to directly express the dimensions and reinforcement information of structural components in the structural layout plan of various components according to the drawing rules of plane integral representation method, and then combine with standard structural detailed drawings to form a complete set of structural design and construction drawings, which greatly improves work efficiency.
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Concrete will produce load cracks when subjected to conventional static loads, dynamic loads, and secondary stresses, which mainly include direct stress cracks and secondary stress cracks.
Direct stress cracks are caused by stress generated directly by external loads, while secondary stress cracks are caused by secondary stress indirectly caused by external loads.
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The acceleration of industrialization has promoted the vigorous development of large-scale construction projects.
As an important carrier of building functions, the construction quality of large-area fine aggregate concrete flooring directly affects the overall performance and service life of buildings.
High quality fine aggregate concrete flooring can not only meet the load-bearing needs of industrial plants, logistics warehouses, and other places, but also effectively reduce maintenance costs in the later stage.
However, there are still many technical difficulties in the construction of large-scale fine aggregate concrete flooring, and it is urgent to establish a sound quality control system to ensure that the project quality meets the standards.
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