Planning is a forward-looking activity, and it is a systematic scheme to decide in advance what to do, how to do it, when to do it and who will do it. Electromechanical installation project is a very important project. The proportion of electromechanical division in unit project is increasing. In order to ensure the success of creating excellence at one time, it is necessary to increase the pre-planning of creating excellence for the electromechanical installation project, so as to facilitate the control of the implementation process and construction. In the mechanical and electrical installation project planning, in addition to ensuring the use function and safety performance of each major, there must be no content that violates the mandatory provisions, and the common quality defects of mechanical and electrical engineering should be eliminated or avoided as much as possible. The plan of creating excellence in electromechanical installation project is an important part of the organization design of electromechanical construction, and it is the basis and targeted document for the project manager to pre-control and create excellence.
1 Engineering Excellence Plan
Generally divided into: overall planning, construction stage planning, detailed planning. Under the framework of overall planning, plan the detailed practices and construction techniques of sub-projects of the project, adhere to "careful planning, process control, meticulous carving and fine building", and truly reflect "master of details and excellent initial intention". 2 The key parts of mechanical and electrical installation project planning are roof, top floor, standard floor, first floor, technical equipment floor, outdoor (fire hydrant adapter, storm sewer, inspection well, etc. ), including bathrooms, strong and weak wells, pipeline wells, ceilings, corridors, guest rooms, conference rooms, offices, multi-function halls, garages, various computer rooms, pump rooms, power distribution rooms, fire control rooms and rooms with special functions.
3 Mechanical and electrical installation engineering excellence how to plan
3. 1 Establish project quality management system
According to the requirements of process quality products, establish and improve the quality management system of the project, and strictly implement it according to the company's "one standard". Effectively supervise and manage the whole construction process to ensure that the project can be fully completed. 3. 1. 1 It is very important to establish a strict organizational system for excellence, which is the basic organizational guarantee for engineering excellence. To ensure excellence, we must ensure that "everything is managed, everything is done, everything is checked and everything is confirmed". Deploy personnel with high quality awareness, good technical level, rich construction experience and innovative spirit to form a project management team to carry out total quality management under the unified deployment and guidance of the company. Clear job responsibilities, target layer upon layer decomposition. 3. 1.2 Strengthen the construction of labor force and improve the quality awareness of construction personnel. In order to achieve the goal of creating excellence with high quality and high efficiency in engineering, selecting a mature construction team is the basis of creating excellence at one time, which requires the trust of long-term cooperation, creating an atmosphere of creating excellence and improving quality awareness. Continuously improve the technical level and operational proficiency of construction personnel, and reward excellent construction teams at the same time, so as to form an atmosphere of "comparing, learning, catching up, helping and surpassing" in the construction team, clearly require the allocation ratio of skilled workers in each construction team, and must have responsible construction personnel to undertake the important task of creating excellence.
3.2 Excellent project planning process
1) Write the project; 2) define the goal of creating excellence; 3) Be familiar with the contents of engineering design; 4) Collect relevant information (relevant specifications, procedures and standards, detailed practices, learning from others' experience); 5) Make a plan for writing a plan book; 6) Organization and division of labor (involving the person in charge, members of the writing team, subcontractors and cooperative units); 7) Plan and implement; 8) First draft; 9) Focus on discussion (projects, branches and group companies); 10) revised and improved; 1 1) for review and approval; 12) released for execution. The main contents of the "Project Excellence Plan" are: 1) Project overview and partial method; 2) Excellence positioning goal and Excellence declaration plan; 3) Difficulties and characteristics of creating excellence; 4) Establish excellent organization and division of responsibilities; 5) involving mandatory provisions; 6) Key points of quality control; 7) Quality acceptance criteria; 8) Determine the highlights of the project; 9) scientific and technological innovation planning; 10) image data acquisition; 1 1) Guarantee measures to achieve excellence.
3.3 Project Quality Characteristics and Highlights Planning
Plan common design, common materials and common practices, and use new construction methods, exquisite construction technology and secondary design to design beautiful styles and realize different general quality characteristics. Plan according to the quality characteristics of the project and find the difficulties and highlights of the project. Understand the design intent of the drawings, and extract and summarize them. Strive to turn the difficulties and characteristics of the project into the highlights of the project. The key point is to draw more quality highlights on the premise of keeping the original design materials unchanged. High-quality materials and complex processes are not always used in the planning of excellent projects. If we plan the most common materials and make some innovations in technology and details, we can also achieve very good quality results. Plan the details and nodes of the project, and plan the prevention of common quality problems of the project. The mandatory provisions of this project are planned, and there are no nonconformities that violate the mandatory provisions.
3.4 electromechanical bim deepening design and comprehensive arrangement of equipment and pipelines
According to the actual situation of the project, BIM technology is used in the whole process to carry out the electromechanical comprehensive deepening design. Achieve the effects of convenient construction, use and maintenance, low cost and beautiful appearance. Fully understand the original design intent, and meet the requirements of centralized layout, parallelism and verticality, neatness and beauty according to the design and specification requirements. For example, the BIM deepening design of refrigeration station and air compressor station of a project is shown in figure 1a). Comprehensive layout of equipment and pipelines, according to the actual situation of the project, deepen the design through pipeline collision inspection and optimization adjustment. According to the general principle, basic principle and avoidance principle of equipment and pipeline layout, the design is deepened by comprehensively considering various factors. For example, the BIM deepening design of integrated pipelines and integrated supports in an air-conditioning machine room of a project is shown in figure 1b). According to the basic principle of pipeline, we must first understand the beam position, beam height and plate thickness of each plane of structural specialty. The second is to understand the control height of the building ceiling and the structural form of the ceiling. Pipes should be staggered, side by side, upward and compactly installed as far as possible, and sufficient installation and maintenance height (space) should be left. The location of electromechanical terminal equipment should be considered comprehensively to facilitate future operation and maintenance.
3.5 Technology Application Planning
On the project, we actively promote the application of new electromechanical technologies, company promotion methods and five small achievements, actively adopt new technologies, new processes, new materials and new equipment, and make innovations in key technologies. The number of construction methods, patents and five small achievements should be planned in advance in this project to lay a good foundation for the next project.
3.6 Planning of signs
1) Generally, the font of the pipeline is Song Ti, and the font size is 0.5 times the diameter of the pipeline. The text and arrow of the pipeline should be adapted to the diameter of the pipeline, and the length of the arrow should be considered according to the diameter of the pipeline. 2) The direction of all arrows should be consistent with the flow direction of the medium in the pipeline, and the arrows should be in front of the text to keep them beautiful and consistent. 3) The identification length of each row of pipelines should be as consistent as possible, and the identification positions of each row of pipelines should be arranged centrally. 4) All words and arrows should be marked in obvious positions, and pipeline identification should be marked in obvious positions above the pipe joint and valve body of the equipment. 5) Signs on equipment, valves and cables shall be in outward font and clearly marked. 6) The pipeline and equipment identification shall be set in an eye-catching position on the side of the passage or working surface, and face the road, working passage or maintenance side. Signs on the same side should be at the same height. 7) Signs shall be set at the starting point, ending point, bend, valve, branch, equipment import and export and crossing the boundary between equipment and system of all pipelines.
3.7 Planning of engineering technical data
Before starting work, make clear the standards and basis of data arrangement to ensure the unity and systematicness of data formation; Designate project professional librarians to be responsible for sorting out and collecting professional engineering technical data. Relevant management personnel involved should make disclosure in place, define the work objectives, define the division of labor and define the work flow. Multi-level directory of data, easy to find and check. The information content is standardized, and the content is true, timely and complete. The data paper is neatly bound, with uniform specifications, beautiful cover and consistent data boxes.
3.8 Planning of engineering image data
Attention should be paid to the collection and accumulation of some basic data in daily construction, especially the collection of key working procedures, key parts, concealed works and detailed practices. It is also necessary to collect the project model area, the display of quality highlights and the overall effect of the functional area. Leave more wonderful and standard moments for the project. Prepare for the next excellent project.
4 conclusion
By deepening the BIM design of mechanical and electrical engineering and compiling the excellence planning book, the purpose of early excellence planning can be achieved, the project implementation and construction control can be truly guided, and a good foundation can be laid for the first excellence of engineering quality.
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