| 基于OFDR技术的深层土体水平位移场监测研究 |
| |
| 引用本文： | 仇唐国,孙阳阳,卢天鸣,朱少华.基于OFDR技术的深层土体水平位移场监测研究[J].压电与声光,2020,42(1):108-112. |
| |
| 作者姓名： | 仇唐国 孙阳阳 卢天鸣 朱少华 |
| |
| 作者单位： | （1.陆军工程大学 野战工程学院，江苏 南京 210007；2. 陆军工程大学 国防工程学院,江苏 南京 210007；
3. 中国电子科技集团公司第二十八研究所，江苏 南京 210007；4.江苏省地质矿产勘察局第四地质大队,江苏 苏州215219） |
| |
| 基金项目： | 国家自然科学基金青年基金资助项目（51608528）；江苏省自然科学基金面上基金资助项目（BK20161467） |
| |
| 摘 要： | 深层土体水平位移场监测是基坑安全开挖的重要指标,现有测斜法耗费大量人力,且精度较低,但仍是当前获得水平位移的主要方法。该文提出了一种基于光频域反射(OFDR)技术的分布式光纤测量法,推导了应变-挠曲变形转换关系,通过室内实验进行了验证,证实了分布式光纤测斜的可行性和准确性,且基于OFDR的测量方法在苏州某基坑工程中得到了应用,准确详细地获取了基坑在开挖过程深层土体位移信息。
|
| 关 键 词： | 水平位移场 光频域反射(OFDR) 分布式光纤 光纤传感 基坑工程 |
Research on Monitoring of Horizontal Displacement Field of Deep Soil Based on OFDR Technology |
| |
| QIU Tangguo,SUN Yangyang,LU Tianming,ZHU Shaohua.Research on Monitoring of Horizontal Displacement Field of Deep Soil Based on OFDR Technology[J].Piezoelectrics & Acoustooptics,2020,42(1):108-112. |
| |
| Authors: | QIU Tangguo SUN Yangyang LU Tianming ZHU Shaohua |
| |
| Institution: | (1.Field Engineering College, Army Engineering University, Nanjing 210007,China;
2.College of Defense Engineering, Army Engineering University, Nanjing 210007,China;
3.The 28th Research Institute of China Electronics Technology Group Corporation, Nanjing 210007,China;
4.The Fourth Geological Brigade of Jiangsu Provincial Bureau of Geological and Mineral Exploration, Suzhou 215219,China) |
| |
| Abstract: | The monitoring of horizontal displacement field of deep soil is an important index for the safe excavation of foundation pit. The existing inclinometer method consumes a lot of manpower and has a low accuracy, but it is still the main method to obtain horizontal displacement at present. A distributed optical fiber measurement method based on the optical frequency domain reflectometry (OFDR) technology is proposed in this paper. The conversion relationship between the strain deflection deformations is derived. The feasibility and accuracy of the distributed optical fiber inclination measurement are verified by indoor experiments. The measurement method based on OFDR has been applied to a foundation pit project in Suzhou, and the displacement information of deep soil during the excavation process is obtained accurately. |
| |
| Keywords: | horizontal displacement field optical frequency domain reflectometry(OFDR) distributed optical fiber optical fiber sensing foundation pit engineering |
|
| 点击此处可从《压电与声光》浏览原始摘要信息 |
| 点击此处可从《压电与声光》下载免费的PDF全文 |
|
