EXPERIMENT STUDY ON CARBON COATED HEATING OPTICAL FIBER FOR SAND LEAKAGE MONITORING BASED ON DISTRIBUTED TEMPERATURE SYSTEM

J.F.Yan 1 , B.Shi 1 , D.F.Cao 1, H.H.Zhu 1 and G.Q.Wei 2

1 School of Earth Sciences and Engineering, Nanjing University, Nanjing, China.

2 Suzhou NanZee Sensing technology Co., Ltd, Dushu Lake Higher Education Town, Industrial Park, Suzhou, China. Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

ABSTRACT

In this article, a new carbon coated heating optical fiber was adopted to monitor the seepage field at different velocity in sand. The principle of sand seepage field monitoring by carbon coated heating optical fiber based on the Distributed Temperature System (DTS) was introduced. A seepage field simulation device and monitoring program were designed as well. The experiment results show that different seepage velocity have a significant effect on the temperature rise and fall process of carbon coated heating optical fiber. By analyzing the time-history curve of rise and fall process of carbon coated heating optical fiber, the relationship between seepage velocity and the highest stable temperature were obtained. Accordingly, a new thought of distributed seepage field monitoring in the rock and soil mass was proposed.

KEYWORDS

Carbon coated heating optical fiber, seepage field, distributed monitoring, DTS, sand.