摘要
岩体完整性系数K_(v)是确定岩体基本质量指标BQ的主要参数,目前国家标准只考虑节理数量而未反映节理倾角和填充物对K_(v)影响。通过对含不同节理面的花岗岩岩样的纵波波速测试,探讨节理数量、倾角、填充物对岩体纵波波速的影响规律。考虑节理倾角、填充物的影响,提出了一种定量计算K_(v)的评价方法。将K_(v)视为正态分布随机变量,以90%的保证率估算K_(v)值,获得与J_(v)的对应关系,结果与国家标准推荐值非常接近。从岩体力学强度评价角度,计算验证了该方法在实际岩体评价中的适用性。提出方法可为岩体基本质量指标BQ的定量评价提供参考。
The intactness index of rock mass K_(v)is the main parameter to determine the rock mass basic quality index BQ.At present,the“national code”only considers the number of joints and does not reflect the influence of dig angel and filler on K_(v).In this paper the effects of joint number,dip angle and filler on P-wave velocity of rock mass are investigated through the P-wave velocity test of granite samples with different joints.Considering the influence of dip angle and filler,an evaluation method for quantitative calculation of K_(v)is proposed.The K_(v)is regarded as a random variable with normal distribution,and its relationship with J_(v)is obtained through the estimated values of K_(v)with a guarantee rate of 90%.The result is very similar to the recommended value of“national code”.From the aspect of rock mass mechanical strength evaluation,the applicability of this method in practical rock mass evaluation is verified.The proposed method can provide a reference for the quantitative evaluation of the rock mass basic quality BQ.
作者
杨泽良
吕庆
沈佳轶
郑俊
刘健
YANG Zeliang;LV Qing;SHEN Jiayi;ZHENG Jun;LIU Jian(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou,Zhejiang 310058,China;Ocean College,Zhejiang University,Zhoushan,Zhejiang 316021,China;Zhejiang Highway and Water Transportation Engineering Consulting Limited Liability Company,Hangzhou,Zhejiang 310006,China)
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2023年第S01期3219-3225,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(42277132,41772287)
浙江省重点研发计划项目(2021C03159)
关键词
岩石力学
岩体基本质量指标
岩体完整性系数
岩体体积节理数
纵波波速
rock mechanics
rock mass basic quality
intactness index of rock mass
volumetric joint count of rock mass
longitudinal wave velocity
