BIM Electromechanical Pipe Synthesis Experience Summary in Residential Basement

Pipeline synthesis is to find and check the loopholes in the design in advance by adjusting the spatial location relationship of electromechanical pipelines, so as to coordinate resources, improve space utilization, and thus facilitate construction and save materials and manpower. Compared with other construction methods, the application of BIM technology in basement pipelines can significantly reduce the problem of intersection circles and errors, reduce the amount of design changes, and improve the net height of the finished surface of the basement and the overall appearance [1], while Huang Ping, Zeng Zhusheng, Zheng Yang, and Wu Wei, all based on actual projects, have studied the application of BIM technology in basement pipeline pre-determined holes, gravity drainage design, pipe well deepening design, basement pipeline synthesis, outdoor pipeline synthesis, construction process BIM specific application and other scenarios [2‐5], many aspects repeatedly verified that compared with the traditional two-dimensional CAD pipeline synthesis, the application of BIM technology in the basement mechanical and electrical pipeline synthesis can indeed improve construction efficiency, project quality. However, the actual project application landing process is not smooth, there are still many problems, the construction unit as the main BIM pipeline synthesis, due to the lack of qualification can not change the original design too much, design modification after re-flip mold workload is huge, and frequent changes in the design drawings, resulting in the original BIM work falls short, BIM repeated design reduces efficiency and increases the cost of use, and the design as the main BIM pipeline synthesis. Designers understand the site environment with differences and not timely, also brings resistance to the application of BIM pipeline comprehensive landing [6], which needs to optimize the implementation process to solve. In addition, the current pipeline synthesis application research summarizes the common pipeline layout principles and avoidance principles, while the actual project pipeline synthesis layout is mostly to avoid collisions, the lack of overall layout plan, resulting in the BIM model does not meet the construction requirements, and ultimately difficult to land.

In order to effectively promote the application of BIM electromechanical pipeline synthesis in actual projects, this paper takes several actual residential basement pipeline synthesis projects as the basis, analyzes the common problems of BIM electromechanical pipeline synthesis in residential basement, summarizes the key points to be grasped in the actual pipeline synthesis projects, summarizes the common residential basement pipeline synthesis layout scheme, and inductively proposes the implementation process for the smooth and efficient implementation of BIM electromechanical pipeline synthesis results, and gives targeted specific suggestions.

The main value point of BIM MEP pipeline synthesis in residential basement is to take the clear height of functional area as the premise, meet the actual construction requirements, combine the cost elements such as materials and measure costs, and integrate the problems that will be encountered during the construction process using design and construction drawings in the traditional mode by adjusting the spatial location relationship of MEP pipelines, so as to improve space utilization, coordinate resources and achieve high-quality construction. This paper summarizes several common problems in residential basement by studying the problem reports of several residential basement pipeline synthesis projects and analyzing the types and quantity distribution of problems that are front-loaded in the process of MEP pipeline synthesis.

The scale of the actual residential basement project studied in this paper is around 60,000–90,000 m², and the types of problems antecedent to its electromechanical pipeline synthesis process are mainly civil drawing problems, electromechanical drawing problems and pipeline synthesis problems, the number and proportion of which are detailed in Table 1.

The problems of drawings include various kinds of labeling problems, at the same time, there are many inconsistencies in plan, elevation, section and system diagrams, in addition, there are also problems of mismatching drawings of each floor, each single unit and human defense, inconsistency between civil construction and mechanical and electrical openings, etc.; the comprehensive problems of pipelines include the problems of insufficient net height, modification of pipeline routing, modification of original design dimensions and modification of original design openings. Among them, the problem of insufficient net height in the integrated pipeline problem mostly occurs in the second floor and below, and the corresponding upper floors are mostly large equipment rooms; the problem of pipeline routing modification mostly occurs in the location where pipelines are concentrated and complicated, and the routing of electromechanical pipelines is optimized under the premise of meeting the professional design function; the problem of original design size modification mostly occurs in the structural beam size and air duct size modification; the problem of original design hole modification mostly occurs in the structural The original design holes are mostly at the holes of structural shear wall, man-proof wall and outdoor structure wall, and the original design holes are inconsistent for the electromechanical pipelines after the general pipeline synthesis, so it is necessary to reissue the hole retention diagram, otherwise it is necessary to increase more electromechanical pipeline bends and may sacrifice the local net height.

The total number of problems in the actual residential basement project studied in this paper is about 120, except for the projects with high quality drawings and simple mechanical and electrical pipelines. The larger the number of problems, the higher the overall quality of the drawings and the more complex the project, the greater the value of the project and the more cost-effective the application of BIM for E&M pipeline synthesis.

This paper studies the implementation process of BIM electromechanical deepening of several well-known domestic real estate residential basement projects, and summarizes the key points that need to be grasped to make a good pipeline synthesis project, mainly three aspects of civil model analysis, building functional partition analysis, and electromechanical pipeline synthesis program determination.

In the actual implementation of the integrated electromechanical pipeline project, in order to implement the BIM integrated electromechanical pipeline results smoothly and efficiently, it is necessary to understand the demand opinions of Party A, the designer and the constructor, to integrate the opinions of all parties into the integrated pipeline model, and to obtain the unified approval of all three parties, in order to meet Party A’s headroom requirements, to reduce design changes, to ensure that the constructor is willing to refer to the model construction, and to improve construction quality and progress. After the practice and summary of several residential basement projects, this paper proposes the implementation process of BIM-based residential basement E&M pipe synthesis project.

The specific implementation process and recommendations are as follows: generally a residential basement area of about 100,000 m², the entire BIM-based mechanical and electrical pipe synthesis requires about 50 working days, the implementation process in order for the BIM preliminary modeling, pipe synthesis of the initial row, program communication, pipe synthesis of the detailed row, detailed modeling, problem pinning, the results of 7 parts, and finally complete the implementation of the residential basement mechanical and electrical pipe synthesis project, and the time allocation of each part are recommended to be 5, 6, 2, 10, 5, 12, 10 days. BIM preliminary modeling is mainly to establish civil framework and electromechanical main model according to the construction drawings drawn by the design, during the process of recording the problems of errors and omissions in the drawings, and feedback to the design to confirm the modification of the drawings; the preliminary arrangement of pipe synthesis is mainly to analyze the civil model, building functional area analysis and electromechanical pipeline situation analysis, for The main line of electrical and mechanical, in the local scope of the layout of several options to meet the net height requirements; program communication is mainly the A party, the design party, the construction party gathered in a meeting to report the preliminary layout of the program, and combined with the views of the three parties to finalize the layout program; pipe synthesis of the detailed layout is based on the determination of the initial layout program, combined with the latest version of the stable construction drawings, the entire scope of the project pipeline comprehensive work, and record Modify the original design and problem areas (if there is no stable version of the construction drawings, only stay in the program communication, grasp the big picture net height can be, is not recommended to carry out pipe synthesis detailed arrangement); detailed modeling is to establish the branch level end model, room model, model of large sample expression, etc., in order to improve the overall model; problem pinning is mainly to solve the problems recorded in front one by one, and consensus with the A party, the design party, the construction party Solution; the results are mainly based on the completed model of mechanical and electrical pipeline synthesis, a full set of problem reports, pipeline synthesis plan, section drawing, single professional drawing, structure stay hole drawing, secondary masonry stay hole drawing, detail node 3D drawing and other results.

BIM technology is an important means of digital transformation in the construction industry, and the value of the application scenario of mechanical and electrical pipeline synthesis in the project has been widely recognized by the industry, but there is still a lot of resistance in the process of specific project implementation. In this regard, BIM technicians are required to continuously improve their professional knowledge and summarize project experience to refine the key issues that need to be grasped in the project, actively innovate to seek value points and continuously optimize the implementation management process, so as to further improve space utilization, coordinate resources, facilitate construction and save materials and manpower for construction projects.