Comparative Analysis of Bridges Construction Methods Using Bridge Information Modeling

Bridge information modeling (BrIM) has widely become an efficient tool in the bridge engineering and construction industry. It has been used in pre-fabrication, obtaining accurate quantity surveys, and creating accurate shop drawings. This article presents the utilization of bridge information modeling (BrIM) in determining the optimum construction methods of concrete bridges in bridge projects in Egypt using systematic procedures taking into account: bridge physical properties, construction cost, and site conditions. Bridge information modeling (BrIM) has proven to be an effective tool in determining the optimum construction methods of concrete bridges. The proposed BrIM approach is capable of obtaining feasible construction methods and associated construction costs based on bridge physical characteristics.

Construction Methods for Long-Span and Bifurcation Tunnel Structure

Long-span and bifurcation tunnel engineering is not very common in underground engineering field. It is difficult to construct this complicated structure because of the numerous influencing factors. In order to find out the optimum construction method for long-span and bifurcation tunnel to guarantee construction security and stabilization of this project, six construction methods were compared and analyzed by using numerical simulation. The results show that: (1) The excavation of confluence segment and small interval tunnel can affect each other but the confluence segment is the crucial part of the whole project. (2) The vertical brace determines surrounding rock and preliminary support stabilization in confluence segment. (3) The central concrete between main tunnel and ramp tunnel is the key point to guarantee the construction security and stabilization of small interval tunnel. The above results certainly contribute to research and develop new types of construction methods for long-span and bifurcation tunnel engineering.

Risk Analysis of Rapid Construction Schemes Based on the Fuzzy Theory

In the engineering project in Contemporary, Rapid construction is an advanced managing concept which core is fast. On the basis of the fuzzy risk, risk degree and fuzzy probability and risk analysis, this paper analyze the factors affecting rapid construction, and with different construction project factors fuzzy risk evaluation set is established. From the Angle of quantitative the risk analysis of hydraulic engineering in the influencing factors of construction schedule. On the impact of factors on construction schedule to different schemes are obtained quantitative values. We can choose the optimum construction scheme reduces risk.