长江三峡工程一期施工重大技术问题及其解决措施

Major Technical Problems and Measures in the I st Stage of the Three Gorges Project on the Yangtze River

通过对长江三峡工程一期施工中的围堰填筑石料开采、围堰水下填筑的程序优化、围堰防渗结构的改进、导流明渠清淤的提前施工、箱涵混凝土的快速浇筑和隔流堤的水下清淤手段等重大技术问题及其解决措施的叙述，展示在一期工程超常规施工条件下技术问题的深度和难度，给出了各项技术问题的具体解决措施和实施效果。

The major technical problems which arose in the first stage of the Three Gorges Project are described,such as extracting stone for cofferdam backfilling,process optimization of underwater backfilling,improvement of cofferdam anti seepage structure,construction of diversion channel silt removing before the due time, fast placement of culvert concrete underwater silt removing of the diversion embankment and so on.The depth of the technical problems and difficulties are also describde,and the measures and their effects are expounded.This paper is also a brief summary of the major technical problems which have arisen up to now in the first stage of the Three Gorges Project.