软弱岩体流变特性及长期强度测定法

所有岩体,特别是软弱岩体,在一定载荷的长期作用下,都具有变形随时间增长而影响其强度的流变特性.这一点,早被许多学者的研究结果及岩体工程实践所证实. 众所周知,断层破碎带、软弱夹层以及被松软物质充填的各种结构面(以下统称弱层)的流变性质更为显著.弱层是许多工程基岩或围岩经常碰到的.因此,对弱层流变特性及其对强度的时间效应的研究,从理论和实践上都有重要的意义.

THE RHEOLOGICAL BEHAVIOUR OF THE WEAK ROCK MASS AND THE METHOD OF DETERMINING LONG-TERM STRENGTH

Based on the in-situ uniaxial compression rheological tests on the weak intercalations and on the fault fragmentation zone ,time-effect on deformation and failure mechanism of the weak rock mass is investigted. The method of determining long-term strength of weak intercalations , empirical formula and influencing range of the time-effect on the various tests are made and the met of determining different stages of rheological process and long-term strength are discussed in detail .