Building Information Modeling (BIM) is a three-dimensional Building model built on the basis of Information in a Building engineering project. The architecture design is three-dimensional through relevant digital information. BIM building information model is not a simple integration of digital information, but a digital method of design, construction and management through the integration and application of digital information. This method supports the overall collective management environment of the construction project, and can significantly improve the efficiency and greatly reduce the risks and hidden dangers of the construction process.

I. Application and advantages of BIM in bidding and tendering of construction Engineering

(I) Convenience brought to the tenderee by the application of BIM

After accurately calculating the amount of work, the bidder has the support of specific data when determining the bidding strategy and the reserved profit value, so as to get rid of the risk previously estimated by experience. Based on BIM construction plan can be anime, simulate the actual construction process, can not only optimize the shi I organizational design, and can visually show the construction process, the bid evaluation experts, and the relevant person in charge of the construction unit of the industry can be a process of construction scheme and construction - eyes clear, greatly improve the bidders of the winning probability.

(II) Application of BIM in the whole life cycle of the construction process

In the design stage, quota design can be carried out with the help of B1M information base. At the same time, various majors participating in the design work can fill in the design information of different majors based on the same model, and then check whether there are conflicts among the designs of different majors through collision inspection, so as to avoid design changes in the construction stage. The application of BIM in the bidding stage has been introduced in the previous part. In the construction stage, the construction process can be simulated, specific construction tasks can be predicted in advance and the supply of materials can be done well in advance to avoid improper construction, save costs and shorten the construction period, so as to achieve the dynamic control of the construction process. The data in the BIM system is constantly updated in the process of the project, so the integrity of the data in the BIM system speeds up the efficiency of settlement at the completion acceptance stage, and avoids the common phenomenon of dispute in settlement at the same time. In the later stage of operation, owners can quickly obtain relevant data with the help of BIM. Meanwhile, property management personnel can quickly understand the data of various equipment in the building with the help of BIM, which facilitates the maintenance and intelligent management.

II. Application of BIM technology in bidding and tendering of construction Process I

(I) Application of BIM in bidding control

In the bidding stage, the establishment of BIM model in various specialties is an important basic work of BIM application. The quality and efficiency of BIM model construction directly affect the effectiveness of subsequent applications. There are three main ways to establish the model: (1) Directly establish the BIM model according to the construction drawings, which is also the most basic and common way. If you can get the electronic files in the format of AutoCAD of two-dimensional construction drawings, use the function of map recognition and transformation provided by the software to transform DWG two-dimensional drawings into BIM model. Reuse and import the BIM model provided by the design software, and generate the BIM model. This is the most reasonable way from the perspective of the whole BIM process, which can avoid the large manual work and possible errors caused by re-modeling.

(II) Application of BIM in the bidding process

1. 4D progress simulation based on BIM

Building construction is a highly dynamic and complex process. In the current construction project management, the network often used to represent the schedule clearly describes the construction schedule and various complex relationships, which makes it difficult to vividly express the dynamic change process of engineering construction. By linking BIM with construction schedule plan, spatial information and Time information are integrated into a visual 4D (3D+Time) model, which can directly and accurately reflect the implementation process and virtual image progress of the entire building. 4D construction simulation technology can reasonably formulate the construction plan, accurately grasp the construction schedule, optimize the use of construction resources and scientifically arrange the site during the construction process of the project, and conduct unified management and control of the construction schedule, resources and quality of the whole project, so as to shorten phase I, reduce costs and improve quality.

2. Bim-based resource optimization and fund planning utilization

BIM can easily and quickly simulate construction progress, optimize resources, predict output value and prepare capital plan. Through the correlation between schedule plan and model, as well as the correlation between cost data and schedule, the cost management and analysis of different dimensions (space, time, flow section) can be realized. By combining the 3D model with the schedule plan, the required funds and resources of each construction schedule plan task are simulated to form the curve of funds and resources corresponding to the schedule plan, so as to choose a more reasonable schedule. By dividing the flow section of the BIM model, the resource demand plan of manpower, materials, machinery and equipment, funds, etc. can be quickly calculated according to the automatic correlation of the flow section. What you see is what you get will not only help the bidder to formulate a reasonable construction plan, but also show it to Party A vividly.