国外某水电站工程厂房区泥质岩工程地质性状研究

Study on Engineering Geological Properties of Argillaceous Rock at Powerhouse Area of an Oversea Hydropower Station Project

某水电站工程电站厂房区基岩主要为第三系中新统Murree组(N;Tm)砂岩和泥质岩组成,其中泥质岩属软岩或极软岩。为了解泥质岩工程地质性状及其对工程建设的不利影响,采用室内试验、原位测试方法,初步查明泥质岩强度、崩解、膨胀、声波特性,结合对泥质岩成分、胶结物及环境变化等因素的分析研究,提出相应的施工期对策。研究成果为后续工程设计和施工中采取有效防护措施、抑制或减弱泥质岩对工程的不利影响提供了依据。

The bedrock at the powerhouse area of an oversea hydropower project consists of sandstone and argillaceous rock of tertiary Miocene Murree formation(N;Tm),of which the argillaceous rock belongs to soft rock or extremely soft rock. In order to find out the engineering geological properties of argillaceous rock and its adverse impact on engineering construction, laboratory tests and in-situ tests are used to detect the strength,disintegration,swelling and sonic features of argillaceous rock. Combined with the analysis and research of argillaceous rock composition, cement and environmental change,countermeasures during construction are recommended. The study results provide a basis for taking effective protective measures in subsequent engineering design and construction to restrain or weaken the adverse impact of argillaceous rock on the project.