【摘要】 文章就冻结过程发生的粘性土水分向冻结锋面迁移和集聚现象,论述了正冻土水分迁移现象及其原因。文章还揭示了软土隧道冻结加固的原理,除了冻结过程直接提高了原土体强度之外,与冻土毗邻之降温区未冻土的水分迁移和土的固结,对提高盾构出洞开挖面的稳定性也起了重要作用。更多还原

【Abstract】 This paper discussed the reason of the underground water migration of the frozen soil, in regard to the phenomenon of the water migrating and accumulating to the freezing front during the freezing process of the clay. This paper reveals the theory of the freezing imrove-ment used in the soft soil tunnel. Besides the freezing process increases the strength of the original soil directly, the water migration and soil consolidation of the unfrozen soil in the lower temperature area abutting the frozen soil play a important role in improving the stabili-ty of the shield excavation face.更多还原