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将红外辐射成像技术引入滑坡物理模型试验中,通过红外热像仪与三维激光扫描仪所搭建的监测系统,对滑坡模型坡体表面变形破坏全过程进行温度与位移的监测。基于滑坡表面监测数据,将原始红外热像监测图形进行数据修正与差值处理,采用处理后获得的温度场数据,将其与模型坡表位移演化规律进行对比分析。结果表明,滑坡模型在进入加速变形阶段前,潜在破裂区域温度随荷载的增大而均匀上升,破裂带内、外温差较小;滑坡模型进入加速变形阶段后,会在潜在破裂区域的红外热像上出现条形的高温异常区域,破裂区域的破裂带内、外温差迅速拉大,两者相差最高为0.49°C,整体滑动失稳前夕,平均红外辐射温度-时间曲线上再表现出破裂带内温度陡增后降低的规律。研究结果表明,红外热像技术可以应用于滑坡模型试验,利用温度可对滑坡进行预测预报提供参考。
The infrared radiation imaging technology is introduced into the physical model test of landslide. The temperature and displacement of the landslide model are monitored through the monitoring system built by infrared thermal imager and 3D laser scanner. Based on the monitoring data of landslide surface, the original infrared thermography monitoring data was corrected and the difference value was processed. The data of the temperature field obtained after the treatment were compared with that of the slope surface displacement model. The results show that the temperature of the potential rupture zone increases uniformly with the increase of load before the accelerated deformation stage of the landslide model, and the temperature difference between the inside and outside of the rupture zone is small. When the landslide model enters the stage of accelerated deformation, the infrared heat in the potential rupture zone Like a strip of high-temperature anomalous region, the rupture zone within the rupture zone, the temperature difference between the outside rapidly widened, the difference between the two highest 0.49 ° C, on the eve of the overall sliding instability, the average infrared radiation temperature - time curve again showed rupture Strip temperature increases after the sharp decline in the law. The results show that the infrared thermal imaging technique can be applied to the landslide model test, and the temperature can be used to predict the landslide.