Application of optical fiber sensing technology in underground engineering

Safety check of structure has a direct relation with the safety of building structure during construction period and operation period. As a kind of new type technology of monitoring, optical fiber sensing technology has tremendous dominances comparing with other any classical sensing, especially in safety check of underground building structure. The paper describes the mechanism of this technology in detail, and also writes up the application of the technology in underground engineering, combined to the project of Beijing Subway the fifth line Chongwenmen Station. According to the using results, optical fiber sensing can replace classical sensing in safety check of underground building structure. The results provide borrow ideas for the new type technology in generalization and application.