Application of Acoustic Emission Technique for Estimation of Initial Stress.
Application of Acoustic Emission Technique for Estimation of Initial Stress.
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应用声发射技术估算初始应力。
DOI：
10.2472/jsms.44.885
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
K. Sugihara
中科院分区：
文献类型：
--
作者：
Koji Hata;K. Michihiro;H. Yoshioka;K. Sugihara
大型地下洞室，如地下电站，只要知道场地的初始应力条件，就可以合理地进行设计和施工。作者对利用声发射技术(Kaiser效应)检测初始应力进行了基础性研究，利用该技术可以估计岩体的应力历史。本文研究了岩石材料的Kaiser效应特性，估算了二维或三维主应力条件。结果表明：(1)Kaiser效应所确定的应力与岩石的最大应力并不总是一致的；(2)Kaiser效应是一种随时间变化的现象；(3)在某些现场测量中，声发射方法估计的初始应力并不总是等于套芯法估计的初始应力。
A Large scale underground cavern, such as an underground power station, can be designed and executed rationally, if the initial stress condition of the site is known. Authors have carried out fundamental studies on the detection of initial stress using Acoustic Emission technique (Kaiser effect) by which the stress history of a rock mass can be estimated. In this paper, the characteristics of Kaiser effect on rock material have been investigated and the two or three dimentional principal stress condition has been estimated. It has been found that (1) the stress determined by the Kaiser effect is not always identical to the maximum stress of rock; (2) the Kaiser effect is a time-dependent phenomenon; (3) the initial stress estimated by AE method is not always equal to the initial stress estimated by the overcoring method in some field measurements.