摘要
岩体具有不同程度的各向异性。对两河口水电站砂、板岩各向异性研究的结果表明:岩石的各向异性与岩性、岩层厚度、岩石风化及裂隙发育程度等因素密切相关。板岩各向异性明显于砂岩;岩层厚度越小,其各向异性越明显;岩石的风化强度越大、顺层裂隙越发育的岩石各向异性越明显。板岩的弹性模量、湿抗压强度各向异性系数为1.10、0.71,砂岩为1.07、0.86,岩体变形模量各向异性系数为1.2。研究成果可为岩石(岩体)力学参数选取提供参考依据。
Rock mass possesses anisotropic properties at different levels.Study on anisotropic properties of sandstone and slate indicates that the property is closely related with lithology,rock stratum depth,rock weathering and fissure development.The anisotropic property of slate is more evident than that of sandstone.The thinner the rock stratum is,the stronger the rock weathering will be.The more developed the bedding fault is,the more evident the rock anisotropy will be.Anisotropy coefficient of elastic module and wet compression strength of slate is respectively 1.10 and 0.71 and those of sandstone is respectively 1.07 and 0.86.Anisotropy coefficient for rock mass deformation module is 1.2.These results provide reference for selecting rock mechanics parameters.
出处
《四川水力发电》
2009年第2期113-114,118,共3页
Sichuan Hydropower
