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Layout of Power House's Cofferdam on Outer River and Optimal Structure Design for Changzhou Hydraulic Project

WEN Qiang,FENG Jian(Guangxi Electric Power Industry Investigation Design and Research Institute,Nanning 530023)  
Power house's cofferdam on outer river is built under the protection of large cofferdam,occupying hydraulic structures that have been built and retaining soil with power house.The construction of the cofferdam facilitates flow let through the outer river and temporarily inundates reservoir area without affecting navigation.The problem of scour prevention has been solved for the earthrock cofferdam,and project investment has been saved for earth-rock materials are put into rational use.
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