红外热像技术在滑坡物理模型试验中的应用

发布时间：2018-03-03 16:40

本文选题：红外热辐射　切入点：滑坡　出处：《岩土力学》2017年01期 　论文类型：期刊论文

【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。
[Abstract]:The infrared radiation imaging technology was introduced into the physical model test of landslide, and the monitoring system was built by infrared thermal imager and 3D laser scanner. Temperature and displacement are monitored in the whole process of deformation and failure of slope surface of landslide model. Based on the monitoring data of landslide surface, the original infrared thermal image monitoring pattern is corrected and the difference value is processed, and the temperature field data obtained after treatment are adopted. The results show that the temperature of the potential rupture zone rises uniformly with the increase of load, and the temperature difference between the outer and the rupture zone is small in the fracture zone before the landslide model enters the accelerated deformation stage. After the landslide model enters the accelerated deformation stage, it will appear stripe high temperature anomaly area on the infrared thermal image of the potential rupture area. The outer temperature difference in the fracture zone of the fracture zone will rapidly widen, the difference between the two is as high as 0.49 掳C, and the whole sliding instability is on the eve of the whole sliding instability. On the average infrared radiative temperature-time curve, the temperature in the fracture zone increases sharply and then decreases. 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 and forecast the landslide.
【作者单位】：中国地质大学(武汉)工程学院;中国电力工程顾问集团中南电力设计院有限公司;绍兴文理学院;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;
【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)~~
【分类号】：P642.22

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