Design changes are often encountered in construction project management. Design changes can be said to be a stressful and difficult task in the management and control process. Applying BIM technology can first effectively reduce the occurrence of design changes, and use 3D modeling collision checking tools to reduce the incidence of changes; when design changes occur, the changes can be input into the relevant models, and automatic changes in engineering quantities can be obtained through model adjustments. This avoids problems such as errors caused by repeated calculations. Directly feedback the cost changes caused by changes in project quantities after design changes to the designer, which is conducive to better understanding changes in engineering design plans and changes in project costs, comprehensively controlling the multi-party impacts caused by design changes, and improving the level of construction project cost management and cost control capabilities, helping to avoid waste and rework.

Engineering quantity calculation is the basis for cost management budget preparation. Compared with traditional manual calculation and two-dimensional software calculation, the automatic calculation function of BIM technology can improve the objectivity and efficiency of calculation. It can also use three-dimensional models to carry out regular or irregular construction, etc. Accurate calculation can also complete the physical deduction calculation of the three-dimensional model in real time, ensuring efficiency, accuracy and objectivity. The application of BIM technology has changed the tedious and complex calculation of project quantities in project cost management, saving manpower, material resources, time resources, etc., allowing cost engineers to better devote themselves to high-value work, do a good job in risk assessment and inquiry projects, and compile accuracy Higher budget. For example, the resort landscape project of a certain regional ocean park hopes to transform the engineering houses in the park into a resort area. It is necessary to add, delete, repair and replace the original house equipment, etc. BIM technology is used to establish a three-dimensional model, which can better solve the pipeline conflicts. Analysis, inspection and design of engineering quantity items such as sunshine, landscape and so on. The biggest advantage of BIM technology in cost management is reflected in the statistics and verification of engineering quantities. After the three-dimensional model is established, specific engineering data can be automatically generated. Comparing the two-dimensional design engineering quantity report and statistics, it can be found that the data deviation is greatly reduced. The reason for such a difference is that in the calculation of two-dimensional drawings, there is the possibility of repeated calculations for engineering projects that span multiple drawings, the possibility of the plane area being ignored in the calculation of area, and the calculation of linear length only taking into account the projection length, etc., etc. These will affect accuracy, and the intervention application of BIM technology can effectively eliminate deviations.

A reasonable implementation plan in the construction project management and control process can achieve twice the result with half the effort. The application of BIM technology to establish three-dimensional models can provide a better, more accurate and more complete data basis, and serve the preparation of fund plans, manpower plans, materials plans, equipment and facility plans, etc. and use. The BIM model can give time information to the project quantity, display the project quantity and project cost in different time periods, which is conducive to the preparation of various plans and the purpose of rationally arranging resources, thereby conducive to the preparation and implementation of cost control plans in the project management and control process. It is conducive to the reasonable arrangement of various tasks and the efficient use of human and material resources and economic costs.

The whole process cost management of construction projects runs through the five stages of decision-making, design, bidding, construction, and settlement. The management of each stage serves the final project investment benefits. The use of BIM technology can exert its own advantages in the cost management of each stage of the project. provide better service. In the decision-making stage, BIM technology can be used to call previous engineering project data to estimate and review current engineering costs, estimate the total project investment amount, and use historical engineering models to serve the estimation of current projects, which will help improve the accuracy of design preparation. In the design stage, BIM technical historical model data can serve the limit design. After the limit design indicators are proposed, the cost calculation data of similar engineering projects can be referred to. On the one hand, it can improve the depth and accuracy of the calculation. On the other hand, it can also reduce the amount of calculation and save manpower and material resources. Cost etc. After the project design phase is completed, BIM technology can quickly complete the model estimate and check whether it meets the requirements, thereby achieving the goal of controlling the total investment and maximizing the value of the design, which is of positive significance for the whole-process engineering cost management. During the bidding stage, the application of BIM technology in the bill of quantities bidding mode can provide bidding project quantities efficiently, quickly and accurately in a short period of time. Especially construction units, when the bidding deadline is tight, can use BIM models to quickly and accurately complete the verification of the bill of quantities that is difficult to verify one by one, reduce calculation errors, avoid project losses, and complete the bidding work with high quality. Cost control in the construction stage requires long time, heavy workload, and many variables. BIM technology's collision check can reduce design changes. Conducting drawing review before formal construction can effectively reduce design problems and actual construction problems, and reduce changes and rework. The three-dimensional model under BIM technology is conducive to the overall arrangement of funds, human and material resources during the construction phase, and the review and payment of progress payments. During construction, the cost can be quickly adjusted according to changes in the situation, so that the project cost can be calculated according to time, process, and area. Achieve refined management of full-process cost control. Finally, in the settlement stage, the BIM model can provide accurate settlement data, improve settlement progress and efficiency, and reduce economic disputes. The construction of an electronic bidding system based on BIM technology has improved the professionalism of construction project bidding, strengthened collaboration between bidding entities, improved the quality and efficiency of bid evaluation, and promoted construction project design, construction, completion acceptance, operation and maintenance The organic connection of each stage promotes the development of the construction industry. (1) For bidders, BIM technology helps the collaborative work of all parties involved in the preparation of bidding documents; it is conducive to data exchange and collaboration between bidding entities, making bidding more smooth and information equitable; it is beneficial to the project process The results of one stage are applied to the next stage to achieve close connection between the design, construction, completion acceptance, and operation and maintenance stages. (2) For bidders, the application of BIM technology helps bidders have a deeper understanding of the actual situation of the projects to be bid, and also provides resources and data accumulation for the company's own management capabilities and profitability; at the same time, bidders can For the comprehensive application of bidding BIM model and enterprise cost database, rapid bidding can be carried out. (3) For the bid evaluation committee, the BIM-based bid evaluation system can provide experts with an intuitive plan display. During the review, experts can conduct detailed analysis and comparison of the building appearance, internal structure, surrounding environment, various professional plans, etc., and You can use BIM solution display to simulate the entire construction process progress and funding plan, making the bid evaluation process more scientific, comprehensive, efficient and accurate. (4) For industry management and development, BIM technology promotes the informatization reform process of industry management and improves the level of refined management. BIM-based bidding makes industry supervision and management more in-depth and convenient, promotes all parties in the industry and practitioners to master and apply BIM technology more quickly, and promotes the organic connection between the design, construction, completion acceptance and operation and maintenance phases of construction projects, thereby Improve the level of refined management in the entire construction industry. The application of BIM technology has changed the tedious and complex calculation of project quantities in project cost management, saving manpower, material resources, time resources, etc., allowing cost engineers to better devote themselves to high-value work, do a good job in risk assessment and inquiry projects, and compile accuracy Higher budget.

Construction drawing deepening stage

After the construction project is completed, the storage and reuse of numerous historical data is a major difficulty. BIM technology can be used to accumulate and share these historical data. When encountering similar engineering projects, these reference data can be called in time. The application of engineering cost indicators, content indicators and other information with high reference value will be beneficial to the future. The review and estimation of engineering projects are conducive to improving the company's ability to control the entire project cost process and the company's core competitiveness.