This paper mainly analyzes the data from the specific application of BIM Technology and virtual reality technology in construction engineering, and fully excavates the specific application of construction technology and model simulation in construction engineering. In the construction project, the key part is the construction information model and construction information management. Therefore, the three-dimensional model of the project is created by using virtual reality technology, and the real construction scene is simulated by using virtual simulation technology. BIM Technology can quickly carry out graphic visualization, architectural drawing, information data simulation and so on. Through the integration and innovation of BIM Technology and virtual reality technology, the building information model is established to provide a stable system platform for the development of construction engineering. Therefore, the application of BIM Technology and virtual reality technology in construction engineering is of great significance to the design and optimization of construction engineering.

Concrete column in engineering need to increase the bearing capacity for various reasons, and requires the column section not to increase. In order to solve this problem, we start two tests of concrete column reinforced hoop and steel plate hoop reinforcement to propose the formula for calculating the bearing capacity, which can be used for reference in the practical engineering.

In view of the problem that the cost, quality and progress of the traditional prefabricated housing can not be clearly understood and grasped before the construction, BIM technology is introduced to carry out the application research of the technology. Firstly, on this basis, the site layout design and simulation of the combined building are carried out. Secondly, the lifting process of assembling component is decomposed and simulated. Finally, the decomposition and construction simulation of grouting operation are carried out. Through this process, the virtual construction can be simulated, so that before the construction, you can have a comprehensive understanding of each construction link, so as to ensure that the cost, quality and progress of the construction can be as close to the predetermined goal as possible.

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Based on capillary tension, surface free energy and elasticity theory, a collapse model of nanopore in C-S-H gel was created in hardened cement pastes. The stability of pore was analyzed by Gibbs free energy theory. The results show that, the capillary is more stable while the capillary is grater and rounder in the case of the aperture changing in the nanometer scope. When the aperture is changing in the scope of micrometer, the collapse possibility of the capillary is tiny. If the capillary size is fixed, the capillary is more stable while the elastic modulus of hydrated products is higher.