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土坝上游坝址区清淤是水库除险加固施工中经常遇到的问题。本文根据临沂市三座大型水库除险加固的设计和施工经验，通过对土坝上游坝址区各种清淤方法的分析比较，提出了坝前无围堰水下清淤方法。并对其施工方法作了介绍。
Dam dredging at the dam site upstream is an issue often encountered in the construction of reservoirs. Based on the design and construction experience of three large reservoirs in danger prevention and reinforcement in Linyi City, this paper puts forward the method of underwater dredging without cofferdam through the analysis and comparison of various dredging methods in the upstream dam site. And introduced its construction method.