三维摄影测量技术在土工离心模型试验中的应用  

Application of the three-dimensional photogrammetric technology in geotechnical centrifuge model tests

作　　者：贾程宏 侯瑜京[1] 魏迎奇[1] 张雪东[1] 张紫涛 梁建辉[1] JIA Chenghong;HOU Yujing;WEI Yingqi;ZHANG Xuedong;ZHANG Zitao;LIANG Jianhui(China Institute of Water Resources and Hydropower Research,Beijing 100048,China)

机构地区：[1]中国水利水电科学研究院岩土工程研究所

出　　处：《中国水利水电科学研究院学报》2019年第3期188-196,共9页Journal of China Institute of Water Resources and Hydropower Research

基　　金：国家重点研发计划项目(SQ2017YFSF060085);中国水科院基本科研业务费项目(GE0145B102017&GE0145B122019)

摘　　要：在土工离心模型试验中,需要对试验模型进行变形监测。传统的测量手段有位移传感器测量及激光传感器测量两种。应用位移传感器进行测量时,需要严格控制其与模型表面的接触;而激光传感器只能测一个点或者一条线上各点的位移,测量范围有限。本文介绍了应用三维摄影测量技术进行变形监测的原理,并将该技术应用于具体的土工离心模型试验中,监测大坝模型在试验过程中的变形。通过三维摄影测量技术所得的结果同激光传感器所得的结果进行对照分析,验证了该技术的合理性及准确性。试验结果说明可以将该技术应用于土工离心模型试验中。In geotechnical centrifuge model tests,the deformation of the testing model is usually needed to be monitored. Conventionally, this is achieved by using LVDTs and laser displacement sensors. For LVDTs,the contact between the sensor and the monitoring point cannot be avoided. The laser displacement sensor can only measure a single spot or a series of points in the same line,limiting the size of measure ment area. In this study,a three-dimensional photogrammetric technology has been proposed to improve the deformation monitoring in geotechnical centrifuge model tests. The basic principles of the technology is first ly presented,and then the technology has been applied in monitoring dam deformation in a centrifuge mod el test. The rationality and accuracy of the technology has been verified using a comparison between the measurements from such technology and those from laser displacement sensors. The technology proposed in this study can be applied in similar centrifuge model tests.

关 键 词：土工 离心模型试验 变形监测 位移 摄影测量 三维 

分 类 号：TV223[水利工程—水工结构工程]