Distributed measurement of temperature for PCC energy pile using BOFDA

Lei GAO 1, Baoquan JI 1, Gangqiang KONG 1, Xu HUANG 1, Mingkun LI 1, Ali H Mahfouz 2,3

1. Key Laboratory of Geomechanics and Embankment Engineering, Ministry of Education, Hohai University, Nanjing, 210098, China

2. Faculty of Petroleum and Mining Engineering, Suez University, Suez, 34721, Egypt 

3. Engineering College, Jazan University, Jazan, 45142, Saudi Arabia Kingdom

PCC energy pile is a new technology for sustainable development of urban areas. Learning and understanding the temperature variation of PCC energy pile is very important to its development and application. In this study, the Brillouin optical frequency domain analysis technology (BOFDA) is firstly used to measure the temperature variation of PCC energy pile from a model test. The aim is to provide an optical fiber sensing method for monitoring the temperature distribution of PCC energy pile. When the temperature of circulating water are 70 ℃, 60 ℃, 50 ℃ and 40 ℃, the result shows the temperature of PCC energy pile under different conditions are measured well by the optical fiber sensor. It will make a deep understanding of the temperature distribution and thermo-mechanical characteristic of PCC energy pile. It can also provide the important scientific and theoretical basis for the design and application of PCC energy pile.

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