Work

Study on active heating method of seepage micro-velocity monitoring

Year: 2025

Type: article

Abstract: Seepage is an important issue of engineering safety, and its monitoring methods are diverse, among which temperature tracing methods are widely applied. In this study, a temperature rise–seepage velocity formula which takes account into natural convection with heat source is obtained. The temperature and the corresponding seepage velocity of calm water and 10 −6 cm·s − 1 to 10 −3 cm·s − 1 are obtained by experiments. Results reveal: 1. After heating for approximately 100 s, the temperature becomes relatively stable, and using this stable temperature for monitoring yields better results. 2. As the temperature difference between the initial water temperature and the room temperature (Td) increases, the temperature rise (Tr) increases, and the relationship is obtained. 3. The device's bias towards the downstream boundary leads to an abnormal temperature rise pattern. Thus the device is placed in the central part, and the water is heated 180 s. The temperature rises are processed, and a temperature rise-flow velocity formula for seepage monitoring by boreholes with active heating is derived. This formula considers the natural convection and extends the seepage velocity range to the micro-seepage velocity range. It holds significant importance for seepage monitoring using the temperature tracing method with active heating, especially for the monitoring of micro velocity.

Source: Alexandria Engineering Journal

DOI: 10.1016/j.aej.2025.04.017

Authors: Ruiyang Liu, Liang Chen, Shufa Yan, Fengzhe Tian, Hanxuan Luo, Zhiwen Xie

Institution: Hohai University

Language: English

Topic: Dam Engineering and Safety

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,900

Funders: National Natural Science Foundation of China, Natural Science Foundation of Xinjiang, Natural Science Foundation of Tibet Autonomous Region