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In this paper, the design and production process of TBM segment of the water tunnel of CCS Hydro-Junction Project were summarized. Firstly, according to the engineering geological conditions, the segment selection was made considering the diameter of the tunnel, the stress characteristics and the construction difficulty. Then, referring to the modified routine method recommended by the American code, the structural stress analysis and reinforcement calculation of the segment were carried out by the finite element analysis software ANSYS. Finally, according to the various technologies of concrete casting and maintenance process, the technical requirements for the whole process of segment production and the technical standards for factory acceptance were formulated. The design and production process of TBM segment in CCS water control project were summarized by the paper, the mechanical characteristics of segment structure were defined, some technical standards such as raw material inspection, concrete preparation, concrete vibration, concrete maintenance and factory inspection of segment concrete were summarized. [ABSTRACT FROM AUTHOR]

Due to the short technical research period in the early stage, many single or special designs issues for Sanhekou Hydro-Junction have limited the process of constructing, such as the insufficient depth, unreality and environmental barriers. In the bidding and constructing stage, the proprietor unit standard from the overall situation and optimized the whole design in time. The optimization indicates that they have shortened the construction duration for 13 months and saved the investor for more than 70 millions Yuan, meanwhile it have improved the construction management efficiency dramatically. This paper analyzed and summarized the construction organization and design optimization results of Sanhekou water Conservancy project from the aspects of concrete mixing system, traffic scheme, slag field, raw material dam foundation excavation, etc. which provided useful reference for similar- engineering constructions. [ABSTRACT FROM AUTHOR]