基于红外热成像技术的抗滑桩土拱效应模型试验研究  

Model test of soil arching effect of anti-slide piles based on infrared thermal imaging technology

作　　者：金林[1] 胡新丽[1] 谭福林[1] 何春灿 章涵[1] 张玉明[1] 

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074

出　　处：《岩土力学》2016年第8期2332-2340,共9页Rock and Soil Mechanics

基　　金：国家自然科学基金项目(No.41272305);国家重点基础研究发展计划"973"项目(2011CB710604)~~

摘　　要：采用模型试验是研究滑坡及其抗滑结构的一种有效方法,红外热像仪在滑坡模型试验中的应用是基于红外检测和热成像原理,利用红外热像仪对滑坡模型抗滑桩区域坡表温度进行有效、准确、实时地检测并记录,有助于分析滑坡破坏过程中抗滑桩所在区域温度场的变化规律,从能量的角度对抗滑桩土拱效应进行研究。试验结果揭示了滑坡抗滑桩区域温度场的分布规律,从温度场方面证实了土拱效应的存在,并揭示了土拱形成过程及其机制;抗滑桩有效地阻止了滑坡推力向桩前发展,发挥了抗滑效果;滑坡发生过程中岩土体应力场、位移场和能量变化是息息相关的。红外热成像技术的应用为抗滑桩土拱效应的研究提供了一种新的研究方法,使得从能量变化的角度研究抗滑桩等防治结构作用机制成为可能,其可行性和可靠性在模型试验中得到了验证。The physical model test is an effective method for landslide and its anti-slide structure research.The application of infrared thermal imager to landslide physical model test is based on infrared detection and thermal imaging principle.With the infrared thermal imager,the surface temperature of the landslide model can be effectively,accurately and real-timely detected and recorded,which helps to analyze the temperature field variation of the anti-slide pile area and study of the effect of anti-slide pile soil aching from the angle of energy.The experimental results reflect the distribution of temperature field in the anti-slide pile area,prove the existence of the soil arch effect from the temperature field,and reveal the process and mechanism of soil arch formation;Anti-slide pile effectively prevent the landslide thrust expand to the front of the pile,and play the reinforcement effect.The stress field,displacement field and energy of rock and soil masses are interrelated in the process of landslide developing.The application of infrared thermal imaging technology presents a new research method to study the soil arch effect of anti slide piles,which makes it possible to study landslide control structures such as anti-slide piles from the aspects of energy;and its feasibility and reliability has been proved in the physical model test.

关 键 词：红外热像仪 物理模型试验 土拱效应 温度 检测 

分 类 号：TU470[建筑科学—结构工程]