【摘 要】
：
Aiming at the composite material structure consisting of stones formed by hardening cementing of consolidation grouting material and rock masses, and based
【机 构】
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StateKeyLaboratoryofWaterResourcesandHydropowerEngineeringScienceWuhanUniversitygSouthRoadofEastLake
【出 处】
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International Conference on Science and Technology of Hetero
论文部分内容阅读
Aiming at the composite material structure consisting of stones formed by hardening cementing of consolidation grouting material and rock masses, and based on the detection data of more than twenty large-scale hydropower projects, under different geological conditions such as fault fracture zones, weathered zones, and excavation effecting zones, the wave velocity changes of pre-consolidation and post-consolidation grouting of rock masses are analyzed, and then the relationship between the increase rate of wave velocity after grouting and the wave velocity before grouting are established.Moreover, the relationship between wave velocity change and deformation parameters of rock masses is discussed.And a comparison is made between detection data and test results of consolidation grouting for the foundation of the intake tower in Pubugou Hydropower Station, the statistics test data are shown in table 1.The results show that: (1) The groutability of rock masses is the decisive factor of consolidation grouting effect.(2) Different rock masses have their corresponding fixed ranges of wave velocity.Under confidence interval of 95%, the ranges of increasing rate of wave velocity of fault fracture zone, weathered zone and excavation influence zone are 14%-38% , 10%-25% and6%-16%, respectively.(3)The relationship between increasing rate of wave ve locity and wave velocity before grouting can be used to predict consolidation grouting effect.
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