中文摘要：

进行了华东、西北地区冻结岩土物理力学性能试验,对比了相互之间的差异。得出白垩系、侏罗系地层岩石导热系数大、比热小、冻胀率小等物理性能。岩石自身强度高,在低温条件下,随养护温度降低,强度进一步提高,但主要体现在-5~-10℃区间,-10℃条件下强度可达10MPa以上,极限破坏应变介于1%~3%之间等力学指标。探讨了华东地区深厚冲积层冻结方案,此经验基础上,提出在白垩系、侏罗系地层冻结方案设计时以考虑防水为主,考虑掘进时爆破对冻结管的影响,应适当加大冻结管圈径,但采用单圈管冻结即可满足工程要求。试验结果为西北地区冻结方案设计提供参考。

英文摘要：

Tests on the physical mechanics performances of the freezing rock and soil from East China and Northwest Regions were conducted and the differences between each freezing rock and soil were compared. The tests showed that the rocks from Cretaceous and Jurassic strata would have a high thermal conductivity, low specific heat, low frost heaving ratio and other physical performances. The rock could have a high own strength. Under a low temperature condition, with a curing temperature reduced, the strength could be further increased mainly in the temperatures between the -5 - - 10℃. Under the condition of -10℃, the strength could be over 10MPa and the limit failure strain would be between 1% ~ 3% and other mechanics index. The paper discussed a freezing plan of deep and thick alluvium in East China Region. Based on the circumstances, in the freezing plan design of Cretaceous and Jurassic strata, water prevention should he mainly considered. In consideration of the blasting affected to the freezing pipe during the mine shaft excavation, a ring diameter of the freezing pipe should be properly increased and but a single ring of the freezing pipe could meet the engineering requirements. The test results could provide the references to the design of the freezing plan in Northwest China region.