Affiliation:
1. Nanjing Hydraulic Research Institute, Nanjing 210029, China
2. The National Key Laboratory of Water Disaster Prevention, Nanjing 210098, China
Abstract
It is very important for embankment engineering to consider the seepage factor. If the potential seepage is not discovered in time and seepage control measures are not appropriate, seepage is very likely to cause damage and deformation, resulting in embankment failure. Based on temperature and seepage fields theories, a temperature–seepage coupled model is established in this paper. It is combined with a distributed temperature sensing (DTS) system to measure the temperature field of the porous media. This approach allows for the inversion of the inner seepage field, realizing the real-time monitoring of embankment health to ensure its safety and long-term operation. According to the coupling analysis on the temperature–seepage fields, for practical engineering, the influence of temperature on the seepage field is small and neglectable. Only the effect of the seepage field on the temperature field is considered. The DTS optical fiber temperature measurement system is widely used in various projects nowadays because of its high stability and efficiency advantages. The optical fiber is sensitive to temperature and can give fast and accurate temperature feedback regarding seepage location. Combined with the Heat Transfer Module in COMSOL, the multi-line heat source method can be used to invert the seepage field according to the temperature field of the porous medium inside the embankment and derive the seepage flow rate of the stable seepage field. For unstable seepage, optical fiber is good at seepage measuring and location detecting. For different practical engineering, a different heating power can be used for different seepage conditions. By monitoring the temperature change, the seepage condition can be inverted which is one of the indicators for evaluating engineering safety.
Funder
National Key Research and Development Program of China
China Postdoctoral Science Foundation
Science and technology projects managed by the headquarter of State Grid Corporation
Open fund of National Dam Safety Research Center
Central Public Interest Scientific Institution Basal Research Fund, NHRI
Jiangsu Funding Program for Excellent Postdoctoral Talent
Natural Science Foundation of Jiangsu Province
Reference29 articles.
1. Analysis of dam failure trend of China from 2000 to 2018 and improvement suggestions;Li;Hydro-Sci. Eng.,2021
2. Analysis and reflection on characteristics of dikes dangers in middle and lower reaches of Yangtze River in 2020;Feng;Yangtze River,2020
3. Non-invasive diagnostic methods for investigating the quality of Žilina airport’s runway;Slabej;Contrib. Geophys. Geod.,2015
4. Structural health monitoring in mainland China: Review and future trends;Ou;Struct. Health Monit.,2010
5. Recent applications of fiber optic sensors to health monitoring in civil engineering;Li;Eng. Struct.,2004