According to experience, beyond the scope of distribution, 1 / 3 of prefabricated components will crack during long-time and long-distance transportation.
Generally, the general contractor of construction and the manufacturer of prefabricated components shall sign the procurement contract, and Party A (the construction unit) may also sign the procurement contract with the manufacturer of prefabricated components.
Therefore, the following matters should be paid attention to in the design, procurement, construction and acceptance stages of prefabricated buildings.
(3) According to the requirements of planning conditions, determine the proportion of prefabricated area of the development plot and the assembly rate of single building, and then determine the types of prefabricated components (including prefabricated balcony, prefabricated laminated plate, prefabricated column beam, prefabricated staircase, prefabricated air conditioning board, etc.).
(3) The quality of prefabricated components depends on the quality of raw materials, construction technology and curing time~~ It is recommended to read ~ ~ key points of road landscaping of municipal engineering.
There are four principles..
It is necessary to ensure that the end of the tower crane can lift the heaviest prefabricated components (generally, the most reconstructed component is prefabricated stairs, with a weight of about 2.1 ~ 4T).
(2) The prefabricated building design shall reasonably set the prefabricated split parts, consider the integrity and construction convenience, and include the plane split drawing and component drawing in the prefabricated special drawing, which is mainly to create conditions for industrialized production and assembly construction.
(5) It is suggested to include the prefabricated design in the feasibility study stage of the project.
Do you understand the differences between joint review of construction drawings, design disclosure and technical disclosure, and how to select the three connection modes of key reinforcement, which parts cannot be welded or bound, and the reserved positions of concrete structural walls, columns and mass construction joints.
(6) The embedded contents shall include electrical, water supply and drainage, construction (setting out hole and pump pipe hole), decoration (stair handrail), etc.
(2) The procurement of prefabricated components shall adopt the principle of proximity.
(4) The selection and layout of on-site tower crane shall be designed in advance according to the weight of prefabricated components.
In the design stage, it shall form a whole with various professional drawings (Architectural Drawing, structural drawing, electrical drawing, water supply and drainage drawing, decoration drawing, etc.).
2、 Procurement stage (1) prefabricated components are part of the structure.
Generally, the distribution range of component factory is within 250km.
if the embedded point has deviation, it can only be adjusted on site, which will increase the cost virtually.
1、 Design stage (1) modular coordination standards shall be followed for prefabricated buildings, and standardized design shall be carried out according to the principle of less specifications and more combinations to realize serialization and diversification.
If the prefabricated detailed design is involved too late, it will lead to additional detailed design costs and drawing review costs; There are too many types of components to be produced in a standardized manner; Assembly costing cannot be performed in advance.
Building assembly is different from the traditional cast-in-situ construction, and the structure is quite different.
