萨哈(雅库特)共和国典型土坝在热虹吸冷却器作用下的热力学监测

Monitoring of typical earth dam in Sakha(Yakutia)Republic with thermal siphon

寒区低水头土坝的稳定性研究对于灌溉系统具有重要的影响,也对国家农业经济的发展具有重大的意义。通过对在热虹吸冷却器作用下的坝体与地基温度的动态监测与分析,指出:(1)1989年3月以前持续6年监测结果表明,热虹吸冷却器运行之后,土壤温度每年都有明显的下降;(2)在热虹吸冷却器作用下,深度达11m时,土壤处于热虹吸冷却器的强烈侧向影响区域,在两端的影响较低,因此可形成坚实的冰土墙,提高土坝的不透水性;(3)根据多年现场监测显示,没有渗流,也没有任何变形或故障。综上表明热虹吸冷却器产生的牢固冻结提高了坝体的结构稳定性,可为后续研究提供依据。

The study on the stability of low water head earth dam in cold region has important influence on irrigation system,and it also has great significance to the development of national agricultural economy.Dynamic monitoring and analysis of the temperature of the dam and foundation under the action of the thermosyphon cooler.Point out:(1)The monitoring results last 6 years before March 1989 showed that the temperature of the soil temperature decreased significantly every year after the operation of the heat siphon cooler;(2)In the thermal siphon cooler under the depth of 11 meters,a strong lateral soil in the thermosyphon cooler at the ends of the affected area,low impact,so it can form a solid ice wall,improve the permeability of earth dam;(3)According to the field monitoring for many years,there is no seepage and no deformation or failure.It is shown that the solid freezing caused by the thermal siphon cooler improves the structural stability of the dam,and provides a basis for the follow-up study.