How to improve the quality of the detailed design of prefabricated building drawings? Since last spring, our company has won a lot of prefabricated building projects one after another
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From the design after winning the bid to the site installation of components, we are concentrating our efforts and forging ahead, at the same time, we are constantly learning experience
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How can we strive to surpass the past and strive to be better? My most obvious feeling is that it is very important to deepen the design of prefabricated buildings
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It is not an additional part of the design
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It requires not only the professional knowledge of prefabricated buildings, but also the full understanding of different stages of the whole project and the close cooperation of various departments and specialties
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In the construction drawing stage, after winning the bid, the construction project department and the component production factory shall jointly review the construction drawings provided by the construction unit
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In this step, the construction unit’s early intervention mainly solves the technical problems in the original architectural design drawings, such as: the wall detail drawing should express the architectural structure method of typical wall parts, the insulation structure method, and the relationship between prefabricated components The joint participation of both parties is more conducive to make full use of the construction site conditions of the project department, select the best drawing deepening design scheme, facilitate the solution of site difficulties and reduce costs
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In the component deepening design stage, the depth of component deepening design is mainly based on the notice of “key points of technical review on construction drawing design documents of prefabricated concrete structure” issued by the Ministry of construction (JJH [2016] No
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287) in December 2016, and the “modular coordination principle” optimizes the size and splitting position of each prefabricated component, so as to reduce the types of prefabricated components as much as possible, so as to ensure the quality of construction components Now the versatility and interchangeability, to ensure that the housing in the construction process, in terms of function, quality, technology and economy to get the best plan
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At this stage, the following points should be done well: the component processing drawings of prefabricated housing should comprehensively and accurately reflect the specification, type, processing size, connection form, equipment pipeline type and positioning size of prefabricated components and parts, consider the reservation and embedment in the production process and construction process, consider the component tolerance and construction error, etc
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For example, the connection position of external scaffold and climbing frame with the main building and the embedded point for connection, the location of freight elevator and the embedded point for cast-in-place formwork, etc
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The depth and content of component processing drawing design should meet the requirements of prefabricated component mold processing and production, efficient construction technology and cost reduction, give full play to the advantages of our group company in the integration of design, production and construction of prefabricated buildings, and establish a collaborative mechanism of communication and confirmation
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After the drawings are reviewed and confirmed by the construction drawing designer, the component manufacturer and the construction party, the component production can be carried out
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Production and construction technology cooperation stage 1
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According to the deepening drawings, cooperate with the factory to complete the component calibration (components with high precision requirements)
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2
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According to the construction organization plan and component weight, determine the layout and type selection of tower crane; check the connection mode between tower crane and building main body and its influence on components
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3
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Consider the influence of temporary support and adjustment measures on prefabricated components
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4
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The technical difficulties in the process of production and construction need to be communicated and solved
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5
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BIM Technology is used to collect all the information about the component (dimensions, reinforcement, embedded parts, holes, etc.) in the construction drawings of buildings, structures, water, heating and electricity, and all the requirements for PC components in each link to the production drawings of components for automatic collision inspection
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Common drawing problems are summarized to form a list of error prone problems, so as to avoid possible mistakes in manual drawing It can greatly improve the drawing efficiency, improve the construction quality and reduce the cost
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