Introduction
摘要
With the vigorous development of infrastructure in society, more and more geotechnical engineering problems have emerged in front of us, such as water conservancy and hydropower projects, nuclear waste storage, energy foundations, oil and gas extraction, deep foundation pit excavation, temperature effects of high-voltage cables on surrounding soil, as well as deformation and stability problems caused by environmental temperature changes in road, slope, municipal, and other engineering constructions (Krishnaiah and Singh in Int Commun Heat Mass Transfer 30(6):861–870, 2003 [1]; Abuel-Naga et al. in Eng Geol 105(3–4):211–219, 2009 [2]; Li et al. in Int J Heat Mass Transf 55(23–24):6819–6831, 2012 [3]). These engineering problems mostly involve the coupling effects between multiple fields such as stress field (M), seepage field (H), temperature field (T), and chemical field (C) of rock and soil. Among them, the temperature field plays an important role in the coupling effect with other fields, but it is often overlooked by people. For example, temperature can lead to a decrease in the mechanical properties of soil, intensify the vaporization of pore water, cause changes in the viscosity of pore water, and result in changes in seepage velocity. These changes in turn affect the stress changes in soil, leading to changes in the mechanical properties of geotechnical materials. Obviously, temperature changes can have a significant impact on the engineering properties of soil, leading to a series of engineering problems such as soil deformation, stability, and reduced bearing capacity.