红外热像技术在滑坡物理模型试验中的应用  

Application of infrared thermal radiation imaging technology to landslide physical model test

作　　者：夏浩[1,2] 胡新丽[1] 唐辉明[1] 雍睿[3] 马俊伟[4] 

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074 [2]中国电力工程顾问集团中南电力设计院有限公司,湖北武汉430071 [3]绍兴文理学院,浙江绍兴312000 [4]中国地质大学(武汉)教育部长江三峡库区地质灾害研究中心,湖北武汉430074

出　　处：《岩土力学》2017年第1期291-299,共9页Rock and Soil Mechanics

基　　金：国家重点基础研究发展计划(973)项目(No.2011CB710604);国家自然科学基金重点项目(No.41230637);国家自然科学基金资助项目(No.41272305)~~

摘　　要：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。A novel monitoring method, infrared thermal radiation imaging technology, is introduced into landslide physical model test With the monitoring system which consists of infrared thermal imager and 3D laser scanner, the surface temperature and deformation is recorded during landslide evolution processes. The surface temperature difference is computed after revision and registration. The evolutionary stages is disclosed from the displacement monitoring data on the surface and the characterizations of the surface temperature during those evolutionary stages are studied. The results indicate that before the model landslide steps into the accelerated deformation stage, the temperature in potential rupture area increases evenly with load while small temperature difference exists between inside and outside of the potential rupture areas. After the model landslide enters the accelerated deformation stage, the banded high temperature anomaly area appears on the infrared thermal image of the potential rupture area. The temperatures difference between interior and external of rupture, area widen dramatically and the highest difference reaches up to 0.49 ℃. Meanwhile, the average infrared radiation temperature and time curve shows a trend of sharply increase-dropping inside the rupture area before landslide failure. The fact that the infrared radiation imaging technology is applied successfully in landslide physical model test indicates that temperature monitoring can be used as a a reference index to predict landslide.

关 键 词：红外热辐射 滑坡 模型试验 温度异常前兆 

分 类 号：TU411[建筑科学—岩土工程]