摘要
在光频域反射(Optical Frequency Domain Reflection,OFDR)技术的分布式光纤测量方法的基础上,提出了基于欧拉梁理论推导出光纤测量应变与土体水平位移之间的转换关系,并通过室内实验进行了验证,证实了分布式光纤测水平位移的可行性和应变-位移转换关系的准确性,且将传统测斜仪法与光纤测量方法分别在基坑工程中得到了应用。通过试验,光纤测量方法能够准确详细地量测深层土体在开挖过程中的水平位移变化情况。
Based on the distributed optical fiber measurement method of optical frequency domain reflection(OFDR),the conversion relationship between the strain measured by optical fiber and the horizontal displacement of soil based on Euler beam theory was proposed,which was verified by indoor experiments.The feasibility of the distributed optical fiber measurement of horizontal displacement and the accuracy of the strain-displacement transformation relationship were verified.The optical fiber measurement method was applied in a foundation pit project.Through the test,the optical fiber measurement method was testified to be able to accurately measure the horizontal displacement of deep soil in the process of excavation.
作者
王中锐
朱少华
陈阳
卢厚清
孙阳阳
韩洪波
张志刚
WANG Zhongrui;ZHU Shaohua;CHEN Yang;LU Houqing;SUN Yangyang;HAN Hongbo;ZHANG Zhigang(National Defense Engineering College,Army University of Engineering,Nanjing 210007,CHN;The Fourth Geological Brigade of Jiangsu Bureau of Geology and Mineral Resources,Suzhou Jiangsu 215129,CHN;Field Engineering College,Army University of Engineering,Nanjing 210007,CHN)
出处
《光电子技术》
CAS
2021年第4期295-302,共8页
Optoelectronic Technology
基金
国家自然科学基金(51608528)
国防科技基金项目(2019-JCJQ-JJ-009)
江苏省地质矿产勘查局科研项目(2018-KY-04)。
关键词
深层土体水平位移
分布式光纤
欧拉梁理论
应变-位移转换关系
基坑工程
horizontal displacement of deep soil
distributed optical fiber
Euler beam theory
strain-displacement transformation relationship
foundation pit engineering
