作 者：朱鸿鹄1 殷建华1 靳伟2 古冬明3
(1. 香港理工大学土木及结构工程学系，香港；2. 香港理工大学电机工程学系，香港；
来 源：土木工程学报 http://www.cces.net.cn/guild/sites/tmxb/read_xb.asp?id=402
Abstract : Existing techniques for foundation instrumentation of civil structures have limitations including low accuracy, poor reliability and difficulty of installation. The feasibility of incorporating fiber Bragg grating (FBG) sensing technology into health monitoring of foundation structures is discussed in this paper. Innovative FBG strain sensors, temperature sensors, settlement sensors and horizontal inclinometers have been developed to monitor strains, temperatures and displacements in foundations. Results from laboratory calibration tests have shown that these sensors have high resolution and repeatability. Recently, these sensors have been successfully installed in the ground soil and the raft foundation of a building in Hong Kong. A quasi-distributed foundation monitoring system was formed, which has an automatic and remote configuration. The early-stage monitoring results are obtained and analyzed. Recommendations are proposed to handle the problems that may occur during the instrumentation.
Keywords: foundation；fiber optic sensing technology；fiber Bragg grating (FBG)；health monitoring