Comprehensive observation method for temperature and strain of roadbed water-stable layer based on embedded optical fibers

• Main Authors: YANG TIANXIANG, ZHANG XUDONG, SU ZISONG, LIU BEI, LYU QINGFENG, FU XIAOGANG, GUO LIANXING, LIU XIAOWEI
• Format: Patent
• Language: Chinese; English
• Published: 20.08.2021
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; MEASURING QUANTITY OF HEAT; MEASURING TEMPERATURE; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; SOIL SHIFTING; TARIFF METERING APPARATUS; TESTING; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR; UNDERGROUND OR UNDERWATER STRUCTURES

The invention discloses a temperature and strain comprehensive observation method based on an embedded optical fiber roadbed water-stable layer. The method comprises steps of optical fiber preprocessing, water-stable layer groove manufacturing, optical fiber laying, data measuring and data processing. The Brillouin optical time domain analysis technology is adopted, full-distributed measurement is achieved, and the temperature and strain information of any point along the optical fiber can be continuously and accurately measured. Meanwhile, the sensing optical fibers are arranged in a net shape in a layered mode, and the information distribution conditions of the cross section and the longitudinal section of a measured object can be obtained at the same time. Real-time, continuous, accurate and three-dimensional measurement of the temperature and strain information of the water-stable layer of the roadbed of the experimental road section is realized. 本发明公开了一种基于埋入式光纤路基水稳层温度、应变综合观测方法，包括光纤预处理、水稳层沟槽制作、光纤铺设、数据测量和数