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根据三峡工程三期RCC围堰10号、11号坝块基础团结灌浆实施成果的资料分析结果,对三期RCC围堰基础团结灌浆设计与施工技术参数和灌浆效果作出评价。通过三峡工程主体大坝基础地质条件与三期RCC围堰10号、11号坝块基础工程地质条件的对比,说明三峡大坝基础的大部份部位基岩本身的物理力学性质较好,基岩团结灌浆可灌性差,没有必要大面积布设固结灌浆。如检测出建基岩体的弹性波速度大于大坝对基岩的变形模量和岩体弹性波速度要求值时,除了增强基岩表层防渗作辅助的需要外,可尽量少设团结灌浆。
According to the results of the data analysis of the basic united grouting implementation results of No.10 and No.11 dam blocks of the third phase of the Three Gorges Project, the design and construction technical parameters and grouting effects of the three phase RCC cofferdam base grouting were evaluated. Through the comparison of the basic geological conditions of the main dam of the Three Gorges Project and the basic engineering geological conditions of the No.10 and No.11 dam of the 3rd RCC cofferdam, it shows that the physical and mechanical properties of most of the base of the Three Gorges Dam are good. Rock grouting irrigation is poor, there is no need for large-scale consolidation grouting. If it is detected that the elastic wave velocity of the bedrock body is greater than the dam deformation modulus of the bedrock and the required value of the elastic wave velocity of the rock mass, besides the need of enhancing the seepage proofing of the bedrock surface, .