%0 Journal Article
%T ACOUSTIC RESPONSES TO ROCK CORE UNLOADING-DISTURBANCE AND UNLOADING-SENSITIVE ROCK MASS<br>岩芯卸荷扰动的声学反应与卸荷敏感岩体
%A Li Xiaozhao
%A An Yingjie
%A Yu Jin
%A Xu Mingjie
%A Liu Tong
%A Zhang Yangsong
%A Luo Qixian
%A <br>李晓昭
%A 安英杰
%A 俞缙
%A 徐鸣洁
%A 刘彤
%A 章杨松
%A 罗骐先
%J 岩石力学与工程学报
%D 2003
%I 
%X Ultrasonic testing is one of the most frequently used measurements in geotechnical rock mass evaluation. The square of the ratio of longitudinal wave (P-wave) velocity of rock mass to that of rock block is defined as intactness index of rock mass. As we know,the P-wave velocity of in-situ rock mass is believed to be lower than that of relevant rock block. The more broken the rock mass is,the lower its P-wave velocity is than that of rock block. However,according to the result of ultrasonic testing carried out at Runyang Highway Bridge,it is surprised to find that most P-wave velocities of rock mass are higher than that of rock block. Many different measurements are applied in the comparative research,which is based on hundreds of rock cores collected from over 40 boreholes in the bed rock of the Bridge site,and the reliability and causes of the results are analyzed. The concepts of rock core unloading disturbance and unloading-sensitive rock mass are then put forward,with relevant engineering countermeasures.
%K rock mechanics
%K velocity of P-wave
%K rock core unloading disturbance
%K unloading-sensitive rock mass<br>岩体力学
%K 纵波波速
%K 岩芯卸荷扰动
%K 卸荷敏感岩体
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=D3421FAA1A0A0F0C&jid=35E747D791A1346351AFB523B7FA35CB&aid=2FD351DFF7E23F76&yid=D43C4A19B2EE3C0A&vid=BC12EA701C895178&iid=59906B3B2830C2C5&sid=752849DB76BA9C87&eid=7C96F677D586AB70&journal_id=1000-6915&journal_name=岩石力学与工程学报&referenced_num=8&reference_num=14