岩滩水电站扩建工程围岩分级及其力学特性  

Classification and Mechanical Properties of Surrounding Rocks at Expansion Project of Yantan Hydropower Station

作　　者：韦国建[1] 高光庭[1] 

机构地区：[1]广西电力工业勘察设计研究院,广西南宁530023

出　　处：《红水河》2009年第3期91-95,共5页Hongshui River

摘　　要：各类岩石工程需首先按国标《工程岩体分级标准》(GB50218—94),对岩体进行分级,先确定岩体基本质量BQ值,再结合工程的影响因素进行修正,确定详细分级,得出[BQ]值。洞室工程可按相关的拟合关系式估算出围岩分类法Q值和RMR值。主要力学参数可按无实测和有实测试验资料两种情况,选用本标准相对应的岩体力学参数和试验统计的折减值,经审核确定,岩滩水电站扩建工程围岩基本质量分级主厂房洞区为Ⅱ级,尾水洞区为Ⅲ级。For rock engineering of various types, it shall at first determine basic quality of rock mass, i.e. BQ, through classification of rock masses in accordance with international Standard for Engineering Classification of Rock Masses （GB50218-94）, and finally get the value of BQ through correction and detailed classification based on influencing factors of a project. For cavity engineering, the values of Q and RMR for surrounding rock classification are estimated by fitted formulas. Main mechanical parameters of rocks are based on test data without and with field measurement. Those parameters correlative to the Standard and reduction values from test statistics are referred to. It is determined that for the expansion project of Yantan Hydropower Station, surrounding rocks at the main powerhouse and the tailrace tunnel are ranked as grade II and grade III respectively.

关 键 词：工程岩体分级 地下厂房 洞室围岩 辉绿岩 坚硬程度 完整程度 岩滩水电站扩建工程 

分 类 号：TV223.1[水利工程—水工结构工程]