Sciences in Cold and Arid Regions ›› 2017, Vol. 9 ›› Issue (3): 280–288.doi: 10.3724/SP.J.1226.2017.00280
• ARTICLES • 上一篇
Research on the temperature field of a partially freezing sand barrier with groundwater seepage
LiYan Lao1, ZhiQiang Ji1,2,3, LiangLiang Huang1, ShangJing Li1
- 1. State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, Jiangxi 330133, China;
2. State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China;
3. State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China
Research on the temperature field of a partially freezing sand barrier with groundwater seepage
LiYan Lao1, ZhiQiang Ji1,2,3, LiangLiang Huang1, ShangJing Li1
- 1. State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, Jiangxi 330133, China;
2. State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China;
3. State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China
摘要： To study the distribution characteristics and variation regularity of the temperature field during the process of seepage freezing, a simulated-freezing test with seepage of Xuzhou sand was completed by using a model test developed in-house equipment. By means of three group freezing tests with different seepage velocities, we discovered the phenomenon of the asymmetry of the temperature field under the influence of seepage. The temperature upstream was obviously higher than that downstream. The temperature gradient upstream was also steeper than that downstream. With a higher seepage velocity, the asymmetry of the temperature field is more pronounced. The asymmetry for the interface temperature profile is more strongly manifest than for the main surface temperature profile. The cryogenic barrier section is somewhat "heart-shaped". With the increasing velocity of the seepage flow, the cooling rate of the soil decreases. It takes much time to reach the equilibrium state of the soil mass. In our study, seepage flow velocities of 0 m/d, 7.5 m/d, and 15 m/d showed the soil-cooling rate of 4.35℃/h, 4.96℃/h, and 1.72℃/h, respectively.
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