关键块体理论在百色水利枢纽地下厂房岩体稳定性分析中的应用  

APPLICATION OF KEY BLOCK THEORY TO ANALYSIS OF ROCK STABILITY FOR UNDERGROUND PLANT IN BAISE HYDRAULIC PROJECT

作　　者：张奇华[1,2] 邬爱清[1] 石根华[1] 

机构地区：[1]长江科学院非连续变形分析实验室 [2]武汉大学土木与建筑学院武汉430072

出　　处：《岩石力学与工程学报》2004年第15期2609-2614,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金(59939190);长江科学院基金资助项目。

摘　　要：介绍了关键块体理论的工程应用技术,包括不定位块体分析、定位块体分析、随机块体分析、块体形态分析与显示、块体稳定性分析及支护措施建议等。在不定位块体分析中,根据节理平均长度假定块体的最大边长,分析块体几何形态特征,进行洞室内最大块体形态分析与显示,由此确定在支护中需要针对性考虑的关键块体,再根据块体几何特征与结构面抗剪强度,分析块体稳定性及所需的锚固力;在定位块体分析中,通过调查实际结构面出露情况,分析块体的实际形态,包括凹形块体的形态,并进行稳定性分析与支护设计校核;在随机块体分析中,随机生成结构面网络并进行随机块体搜索。在这套工程分析技术研究中,发展了一些新技术,如假定块体最大边长分析块体形态、凹形块体形态分析与显示、块体稳定性分析与锚固支护建议等。Key block methods are applied to analysis of rock stability for underground plant in Baise hydraulic project,including analysis of unlocated,located and random blocks,block visualization,block stability analysis and reinforcement measures. In unlocated block analysis,the geometric figure of block is analyzed by determing the maximum edge length of block according to the average joint length obtained from investigation. The location of maximum key block in cavern is analyzed and displayed,so as to determine those blocks which should be considered in reinforcement design. Based on block geometry and joint shear strength,block stability is evaluated and anchor force is suggested to assure block safety. In located block analysis,actual geometry of blocks,including concave blocks are analyzed and shown by investigation of joints in underground plant. Then the anchor reinforcement program is checked accordingly. In random block analysis,joint net simulation and random block search are introduced. In the study of key block theory applied to rock engineering,some new techniques are developed,such as block geometry analysis by assuming maximum edge length of block,concave block analysis and visualization,block stability analysis and reinforcement suggestions.

关 键 词：百色水利枢纽 地下厂房 岩体稳定性 地下工程 关键块体理论 定位块体 随机块体 

分 类 号：TV223.1[水利工程—水工结构工程]