岩体完整性系数确定及应用中的几个问题探讨  

DISCUSSION OF PROBLEMS IN CALCULATION AND APPLICATION OF ROCK MASS INTEGRITY COEFFICIENT

作　　者：段世委[1] 许仙娥[1] 

机构地区：[1]中水北方勘测设计研究有限责任公司,天津300222

出　　处：《工程地质学报》2013年第4期548-553,共6页Journal of Engineering Geology

摘　　要：岩体完整性系数是一个与岩体质量和强度有关的地质参数,用于岩体完整程度划分、工程岩体质量分级等方面。然而不同的规范在岩体完整性系数的确定和应用等方面存在分歧。本文分析了岩体波速测试方法、岩体风化状态对岩体完整性系数的影响以及岩体体积节理数与岩体完整性系数的关系,并对岩体完整性系数应用中存在的问题进行了探讨。确定岩体完整性系数时,若岩块与岩体弹性波速的测试方法不同,应进行修正。所测试的岩块与岩体应处于相同的风化状态。采用岩体体积节理数确定岩体完整性系数时应考虑岩体中结构面的张开宽度和充填情况。应注意区分规范中围岩工程地质分类与岩爆判别中的围岩强度应力比的不同地质含义。The integrity coefficient of rock mass presents general quality and strength of rock mass.It is an important input parameter in many analysis of rock mass behavior such as in rating of rock mass integrity and quality and rock mass classification.However,there are divergences in relevant codes on how to determinate and apply the integrity coefficient.This paper discusses the contributing factors on determination of integrity coefficient.It then suggests that the elastic wave velocity of intact rock and rock mass for calculation of integrity coefficient be measured in the similar weathered rocks with the same geophysical method.Otherwise,the measured value has to be corrected. The openness and filling conditions of discontinuities should be carefully considered when the integrity coefficient is estimated with the volumetric joint number.In rock mass classification and estimation of rock burst,the term ratio of rock mass strength to ground stress has different geological implications.The rock mass strength has relation with integrity coefficient of rock mass.

关 键 词：工程地质 岩体完整性系数 弹性波速 围岩强度应力比 

分 类 号：P642[天文地球—工程地质学]