摘要
岩土体流动(滑坡、泥石流及液化土体等)往往会造成工程结构物的严重破坏,而流动过程中的构型、速度场分布等运动参数是设防的重要依据。目前常规的实验手段难以捕捉岩土体流程过程中运动特征,基于粒子成像测速(PIV)测试技术开发了一套综合评定土体流态运动的模型系统,并通过砂土流动试验验证了模型系统的有效性。该模型系统能实时捕捉土体流动过程流动构型,并可以结合PIV计算准确得到土体流动过程中的速度场分布。基于该模型系统的岩土体流动试验为揭示土体大变形的流动规律提供了参考,同时试验结果也为由于土体流动造成的破坏的设防提供了依据。
Soil flow,such as slop,fabric flow,post-liquefied soil etc,may cause serious damages to engineering structures.The soil flow configuration and velocity field are the important basis for fortification against soil flow.In order to overcome the limitations of normal experimental methods for motion capture during soil flow,a newly developed model system based on Particle Image Velocimetry（PIV） technology was introduced.The effectiveness of this model system was proved by sand flow test.It is found that the model system can not only capture the soil flow configurations but also calculate the velocity field during soil flow by the PIV method.The model system can provide reference for soil flow and disaster prevention.
出处
《实验室研究与探索》
CAS
北大核心
2012年第5期22-24,共3页
Research and Exploration In Laboratory
基金
同济大学第六期实验教学改革专项基金项目
第四批高等学校特色专业建设点(TS11385)
关键词
土体流动
粒子成像测速
模型系统
流动构型
soil flow
particle image velocimetry（PIV）
model system
flow configuration
