[transferred from BIM crowdsourcing network] with the development of BIM Technology in China, BIM Technology has developed from some simple static collision analysis to the whole life cycle application of the whole project
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A project starts from the construction approach, the first thing to face is how to reasonably arrange the construction site of the whole project
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Reasonable site layout can minimize the repeated adjustment of plane position of large machinery and temporary facilities in the future, and maximize the performance of large machinery and facilities
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At the same time, it can do a good job in the demand analysis of logistics materials, arrange the material mobilization and material stacking as reasonably as possible, make reasonable planning for the flow of people on site, and ensure the flow process
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In order to avoid the above problems, BIM Technology can be applied to the planning stage of temporary facilities on the construction site in advance, so as to better guide the construction and reduce the construction risk and cost for enterprises
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BIM based virtual construction includes BIM based construction simulation, BIM based component virtual assembly, BIM based construction site temporary facilities planning and so on
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Today, let’s talk about BIM construction simulation ~ construction simulation 1
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Overview of virtual construction
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Virtual construction (VC) is the virtual realization of the actual construction process on the computer
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It uses virtual reality and structure simulation technology, and works in groups with the support of high-performance computers and other equipment
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Building geometric model and construction process model through BIM Technology can realize real-time, interactive and realistic simulation of construction scheme, and then verify, optimize and improve the existing construction scheme, gradually replacing the traditional construction scheme preparation method and scheme operation process
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In the three-dimensional simulation operation of the construction process, we can predict the problems that may be encountered in the actual construction process, avoid and reduce the rework and waste of resources in advance, optimize the construction scheme, reasonably allocate the construction resources, save the construction cost, speed up the construction progress, control the construction quality, and achieve the purpose of improving the construction efficiency
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BIM based virtual construction technology system process
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From the system architecture, it can be seen that the use of virtual construction technology in construction projects will be a huge and complex system engineering, including the establishment of three-dimensional model of building structure, the construction of virtual construction environment, the definition of the sequence of building components, the virtual simulation of the construction process, the comprehensive collision detection of pipelines and the determination of the optimal scheme It involves the information sharing and collaborative work among different professionals in architecture, structure, water, heating and electricity, installation, decoration, etc
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BIM based virtual construction system process the carrier of BIM is model, the core is information, its essence is the information integration platform for the whole process
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Virtual construction is virtual reality through simulation technology
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With the continuous maturity of BIM, BIM Technology is combined with virtual construction technology, and BIM Technology is used to model, simulate, analyze, design and digitalize and visualize the construction process in virtual environment
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Through virtual construction, project design, construction process control and management can be optimized, design and construction problems can be found in advance, solutions can be found through simulation, and then the best design and construction scheme can be determined, which can be used to guide the real construction, and ultimately greatly reduce the rework cost and management cost
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If the virtual construction effectively cooperates with 3D visualization function and time dimension, it can simulate the progress of construction
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4D model virtual construction can intuitively and quickly compare the construction plan with the actual progress anytime and anywhere, and effectively coordinate at the same time, so that the construction party, the supervisor, and even the owners and leaders who are not in the engineering industry can know all kinds of problems and situations of the project at their fingertips; 5D model can accurately measure the project quantity, effectively control the cost; 6D model can effectively control the safety cost Simulation of the environment, always observe the changes in the environment, do a good job in improving and preventive measures
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In this way, BIM Technology Combined with construction scheme, construction simulation and on-site video monitoring can reduce construction quality problems, safety problems, rework and rectification
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The characteristics of virtual construction of Nd virtual construction model based on BIM include: 1
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It is because of its characteristics that the rework rate in the construction process is greatly reduced and a large part of the cost is saved
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2
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Analysis and optimization, analyze and optimize the design to ensure the constructability
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Integration of design, so that the professional collaboration in the beginning of the design “naturally” through the central database, without the participation of specific personnel, organization, management, communication in the design is obvious, basically without any cost
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Enhance the means of design optimization, design, inspection and coordination, modification, redesign cycle process, until before the construction to solve all design problems, eliminate design errors and design neglect, reduce the cost of rework in construction
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In the process, BIM model and schedule software (such as MSProject, P3, etc.) are integrated to monitor the construction progress in real time and adjust the site conditions in real time
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Buildability analysis, comprehensive buildability simulation analysis of safety, construction space and environmental impact
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In the early stage of construction, the collision problems of various specialties are simulated, and the integrated and coordinated data are generated and provided to solve the problems of traditional two-dimensional drawing joint review, such as long time-consuming, low efficiency and difficulty in finding problems
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3
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Optimize the construction management, clearly show the construction process, and all kinds of workers can clearly understand their work content and working conditions
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Core technology of virtual construction 2
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Purpose and significance of simulation construction ▷ 4D construction simulation improves management level
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Construction schedule is an important technical document for project construction and guiding engineering construction, and an important basis for construction units to carry out production and economic activities
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Schedule management is the center of quality, schedule and investment, which directly affects the realization of schedule target and the exertion of investment benefit
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The construction schedule is the core of the construction organization design
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By reasonably arranging the construction sequence, the construction task of the proposed project can be completed according to the specified time limit with the least consumption of labor, materials and funds
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The traditional way of schedule management is based on two-dimensional drawings, network diagram and so on
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▷ buildability simulation improves work efficiency
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In order to complete the project on time, it is difficult to avoid the cross construction of different specialties in the same area and on the same floor
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Whether the construction sequence and construction area of all parties can be well organized and coordinated will have an impact on the work efficiency and the planned check
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BIM Technology can provide support and basis for each professional construction party to establish good coordination management through construction simulation
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3
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The simulation software to realize the virtual construction process
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The software used for modeling does not have the ability of construction simulation
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In order to realize the construction process simulation, we need a tool which can combine BIM model with construction schedule and display them in the form of animation
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You can use NavisWorks here
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The main functions of NavisWorks are as follows: real-time roaming of three-dimensional models, model integration, collision checking, model rendering, 4D simulation, support for PDMS and PDS models, model release, and virtual construction
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Virtual construction can compare different construction schemes, and simulate and optimize the schemes in advance
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The optimal construction scheme can be determined through the detailed comparative evaluation of virtual construction from the aspects of equipment investment, construction period, construction measures and costs
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In addition to using construction simulation technology to optimize the construction scheme, the virtual assembly and hoisting of components based on BIM, and the planning of temporary facilities on the construction site are also gradually developing.
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