工程地质学报2016，Vol.24Issue(6)：1170-1176,7.DOI:10.13544/j.cnki.jeg.2016.06.016
循环荷载下含软弱夹层岩体声学特性试验研究
RESEARCH ON THE SWCC OF UNSATURATED NATURAL RESIDUAL SOIL
摘要
Abstract
By means of the vibration test system as well as the ultrasonic testing device and dynamic signal analysis system,the experiment on rock mass with weak intercalation fatigue damage are performed under cyclic loading. The acoustic parameters during defect rock fatigue damage are real-time measured and analyzed in detail.Results show that the ultrasonic wave velocity varies particularly sensitive to the fatigue cycle and reduces with an inversed S-shaped line.The waveform changes from an approximate semicircle to malformation,and the waveform correlation coefficient is descending as a whole with the cyclic times increasing.The ultrasonic wave amplitude has an intense fluctuation in the middle of the fatigue damage.And the rules of frequency-domain characteristics is not obvious, only when sample is nearly damaged,the maximum value of frequency domain and frequency decline sharply,which lead to a hard effective analysis and recognition of the frequency-domain characteristics.Finally,a damage variable is defined based on the transverse ultrasonic wave velocity and the Logistic inverse function equation and the nonlinear quartic polynomial are used to describe the growth law of rock mass with weak intercalation fatigue damage.The results may offer theoretical references for slope fatigue stability evaluation and reinforcement engineering under different kinds of vibration environment.关键词
循环荷载/含软弱夹层岩体/疲劳损伤/声学参数/演化方程Key words
Cyclic loading/Rock mass with weak intercalation/Fatigue damage/Acoustic parameters/Growth law of fatigue damage分类
天文与地球科学引用本文复制引用
许旭堂,简文彬,林玫玲,王文韬,樊秀峰..循环荷载下含软弱夹层岩体声学特性试验研究[J].工程地质学报,2016,24(6):1170-1176,7.基金项目
国家自然科学基金项目（41072232），福建省自然科学基金项目（2010J01254）资助． （）
