1. Features of BIM technology

BIM technology can minimize repeated operations and resource waste in civil engineering construction by using new information processing technology and production mode, so as to improve construction schedule and production efficiency and bring revolutionary changes to civil engineering construction . The main features of BIM technology include the following three points:

1.1 Integration

BIM technology can integrate all kinds of information construction, including construction equipment, building structure, planning and design, and other professional information, and make this kind of information in order to the longitudinal or transverse circulation, thus forming the 3 d information model [2]. This model is visual, can figure out, coordination, information integrity and optimization, etc, to civil engineering construction managers to collect and provide large amounts of data information.

1.2 Systemic

The systematic characteristics of BIM technology can standardize the use of tools in the construction process, enable the staff of different links and different professions to carry out collaborative work according to the construction problems, and eliminate construction faults and problems in a timely and effective manner.

1.3 Sharing

Sharing characteristics of BIM technology refers to the all participants of the same item of information release on the same platform, to achieve the various participants in recent construction information anytime and anywhere, avoid horizontal and vertical communication barriers, to unify the complicated information coordination, reduce the repeated collection of information, enhance the efficiency of data information [3].

2. Specific application of BIM technology in civil engineering construction

2.1 Construction Stage

2.1.1 3d Modeling field

BIM technology in the field of 3 d modeling application generally reflects on the construction model, through the BIM technology makes the model maximum close to the real component, and lay the foundation for subsequent work. In the field of 3 d modeling, BIM figure yuan component is a commonly used method, the user can make use of BIM figure yuan component free establishment model. In the specific application, the user can according to the specific building number, size, material selection and design, the permutation and combination form of [4]. It is important to note that in the process of BIM modeling, some family file cannot be IFC mode of coding, If the BIM model directly into the IFC files part will lead to loss of data. Aiming at this problem, the user can choose to replace the file, use the ITC can be coded file editing work done, you can also use SolibriModelChecker software system on the family of all files, screening and can meet the requirements of editing files. All the families of modern buildings often modelling novel and complex shape, to enhance the civil engineering construction difficulty and complexity. Use BIM technology for 3 d modeling, can realistically present architectural appearance, As reference data for engineering construction in the late. For example, civil engineering construction for horn architecture can make use of the concept of body in Revit software platform 3 d modeling BIM technology. Through the model can intuitive understanding of the various standard high body size, with the size of the foundation for later formwork support mold design [5]. At the same time, BIM technology can overcome the horn building interior problem of spiral staircase design and installation, etc, and found the error and defect in design drawings in time.

2.1.2 Simulation construction

Simulation construction refers to the use of BIM technology after completion of 3 d modeling through all kinds of parameter setting to make 3 d model reflects the actual situation of the visualization, dynamic construction, enhance the predictability of engineering construction and forward-looking. Users can use the Revit in BIM technology and MVC system and build a software Project based on BIM technology 3 d model of 4 d system, make the BIM technology give full play to the advantages in Project schedule management [6]. The BIM technology has a wide range of application in the civil engineering construction, a single software is difficult to finish technology. Typically, For example, Revit platform, a common BIM technology integrated software platform in civil engineering construction, can be used by users to realize simulated construction in the form of software combination.

2.2 Construction management stage

2.2.1 Construction control

BIM technology not only can carry on the macroscopic control for engineering construction as a whole, can also according to a certain link, or a part of a construction node for intensification of simulation, from the overall to local construction control [7]. The user can use more in-depth and comprehensive time parameters and geometric parameters through the 3 d model with 4 dbim technology on the progress of the implementation of automatic measurement. For example, the user can set up based on BIM technology of 4 d - GCPSU application system, the system can through the analysis of the relevant parameters for the collision and construction schedule planning, construction material consumption management, etc., So as to achieve the effective control of the construction schedule.

2.2.2 Cost management

Users can carry out project cost estimation and project cost accounting through BIM technology to achieve scientific cost management [8]. Specific accounting methods mainly include three types: first, API interface is used to connect cost accounting software with BIM technology platform; Second, connect the BIM model through ODBC (open database); Third, information extracted with BIM technology platform construction engineering, and related data derived by using the Ex - cel file information [9]. Users can choose according to actual condition can meet the demand of the construction of accounting methods, thus to scientific and effective link of project cost management. Above all, BIM technology with its characteristics of integration, systemic and sharing plays a huge advantage in the actual construction application, can not only present in the form of a 3 d architectural appearance, also for the whole process of engineering construction and local details were simulated, Convenient for design and construction personnel familiar with the construction environment, strengthening the progress control and cost management. To avoid unnecessary amendments and rework, saving construction cost, manpower cost and economic cost of the time. In future development, can strengthen the BIM technology standard build and cooperate with other technologies, the technology make BIM technology constantly improve and optimize.