Improvement of Mechanical Coupling Between Fiber-Optic Sensing Cable and Soil Mass by Anchoring

被引：0

作者：

Jiang N. ^{[1
]}

Wu J. ^{[1
]}

Liu H. ^{[1
]}

Shi B. ^{[2
]}

Liu S. ^{[2
]}

Wei G. ^{[3
]}

机构：

[1] School of Civil Engineering, Suzhou University of Science and Technology, Suzhou, 215011, Jiangsu

[2] School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210023, Jiangsu

[3] Suzhou NanZee Sensing Technology Co., Ltd., Suzhou, 215123, Jiangsu

来源：

Zhongguo Jiguang/Chinese Journal of Lasers | 2019年 / 46卷 / 11期

关键词：

Fiber optics; Fiber-soil coupling; Low confining pressure; Pull-out test; Wafer anchor;

D O I：

10.3788/CJL201946.1110001

中图分类号：

学科分类号：

摘要：

The coupling of the sensing cable to the surrounding soil is essential to the application of distributed optical fiber monitoring technology for monitoring soil deformation, particularly the coordination of fiber-soil deformation under low confining pressures, which seriously affects the accuracy of the measurement data. In this study, the anchored fiber-optic cable is designed and the fiber-soil pull-out test is performed to investigate the effects of backfill material and anchoring method on fiber-soil coupling under low confining pressures. Results show that the backfill material considerably affects the fiber-soil coupling. The higher the clay content is, the better the coupling is. Under low confining pressures, the fiber-soil coupling can be effectively enhanced by adding the wafer anchor into the sensing cable. Decreasing anchor interval and increasing anchor diameter can improve the fiber-soil coupling. © 2019, Chinese Lasers Press. All right reserved.

引用

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