回弹值与岩体特性指标定量关系  

Quantitative Relationship between Rebound Values and Index Properties of Rocks

作　　者：满侨侨 赵其华 Man Qiaoqiao;Zhao Qihua(State Key Laboratory of Geohazar Prevention and Geoenvironment Protection,College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059,P R. China)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室环境与土木工程学院,成都610059

出　　处：《科学技术与工程》2017年第33期52-57,共6页Science Technology and Engineering

基　　金：国家重点基础研究发展计划(973计划)(2011CB013501);国家自然科学基金(42272333)资助

摘　　要：以金沙江叶巴滩水电站坝址区工程地质岩体为研究对象,现场测试23号平硐(PD23)、50号平硐(PD50)的波速(V_p)、RQD、回弹值(R)。先分析V_p、RQD、R随硐深的变化关系,再揭示回弹值与波速、RQD、风化程度之间的关系,建立定量模型,提出采用R对工程区部分平硐岩体特性指标(V_p、RQD)进行估算和风化程度等级的判断。研究表明:斜长花岗岩回弹值随波速增加而增加,呈指数关系,PD23和PD50的相关系数皆为0.84;回弹值随RQD增加而增加,呈线性关系,PD23和PD50的相关系数分别为0.83和0.87;风化程度越强,回弹值呈相应程度降低,变化规律呈良好的相关性。In this paper,a hydro-power station in Jinsha engineering geological rock as re-search object,test wave velocity(Vp),RQD,rebound values(R)of NO.23footrill(PD23),NO.50footrill(PD50).Firstly,therelationship between Vp,RQD,R and the depth of the footril is analyzed,then reveal the relationship between rebound values and wave velocity,RQD and weathering degree,quantitative model is established,R is proposed to estimate part of the tunnel rock mass characteristics index(Vp,RQD)and judgment of the weathering results show that rebound values increases as wave velocity increases,which presents the power functionrelationship,the correlation coefficients of PD23and PD50are all equal to0.84%The rebound values increases as RQD increases,which presents the linear function relationship,the correlate on coeffi-cients of PD23and PD50are respectively0.83and0.87.Weathering degree is higher,re-bound values is decreased accordingly,showed a good correlation.

关 键 词：回弹值 斜长花岗岩 岩体特性指标 定量关系 

分 类 号：P642.3[天文地球—工程地质学]