粉砂质板岩各向异性特性研究

Study on Anisotropic Characteristics of Silty Slate

在水电工程中,地质条件对工程设计方案的选择和建设的顺利实施具有至关重要的影响,岩性条件的好坏对于岩体承载能力大小、支护设计形式和加固强度选择等更是起到决定性作用。以某水电站的浅变质粉砂质板岩为主要研究对象,在其矿物成分分析的基础上,进行岩石物理力学性质试验、岩石中剪试验、岩体变形试验、岩体变形试验配套声测等各项物理力学试验,通过试验数据可知粉砂质板岩垂直板理和平行板理方向具有明显的各向异性的物理力学特征。本文针对粉砂质板岩该特性,分析其间的相关性,将该区域岩体特征更好的利用,以服务于工程建设。对于类似岩性条件的各类工程具有很好的实际参考意义。

In hydropower projects,geological conditions have crucial impact on the selection of engineering design schemes and smooth implementation of construction. The lithologic condition plays a decisive role in rock bearing capacity,support design patterns,reinforcement strength selection,etc. Taking the metamorphic silty slate of a hydropower station as the main research object,based on the analysis of its mineral composition,the physical mechanics tests were carried out,such as physical mechanical properties test of rock,middle-size shear test of rock,rock mass deformation test,matching acoustic detection of rock mass deformation test and so on. The test data show that the silty slate has obvious anisotropic physical mechanical characteristics in vertical plate and parallel plate direction. Through exploring the reasons and analyzing the correlation between them,the characteristics of rock mass in the region are better used to serve the project construction,which is a very good practical reference for various types of projects with similar lithology conditions.