基于声发射监测的路堤相似模拟破坏过程分形特征研究

Fractal Analysis of Similar Simulation of Embankment Failure Process Based on Acoustic Emission Monitoring Technology

路堤边坡的变形甚至破坏是山区公路建设和运营过程中面临的严峻问题,若能在路堤边坡破坏前进行方便、准确的预测和预报,则可以有效避免人员伤亡与财产损失。引入声发射技术进行路堤边坡稳定性监测,进行室内相似模拟试验,分析讨论了不同波导杆杆径与碎石粒径条件下的声发射特征,提出了将声发射分形维数大幅度下降作为路堤边坡破坏的前兆特征,从而为预测、预报路堤边坡破坏提供了一种监测分析手段。

The deformation even failure of embankment slope is a serious problem in the construction and operation duration of mountainous area highway. If convenient, accurate prediction and forecast could be put into force, there will be less casualties and property losses. In this paper acoustic emission technology is brought in to monitor the embankment slope stability and conduct indoor similar simulation tests, the acoustic emission characteristics of different diameter of waveguide rod and gravel particle size are analyzed, it is proposed that the substantial decline of acoustic emission fractal dimension is precursor to the failure of embankment slope, which can be a new monitoring and analysis means for forecasting the failure process of embankment slope.