Calculation of salt-frost heave of sulfate saline soil due to long-term freeze?thaw cycles

• 作者: Feng Xi Zhou Sai Ying Tao Wen
• 来源期刊: 寒旱区科学（英文版）
• 年，卷（期）: 2020,（5）
• 所属期刊栏目: Articles
• 页码范围: 284-294
• 页数: 11页
• 语种: 英文

摘要

Based on salt-frost heave tests of sulfate saline soil under repeated freeze?thaw cycles, this paper discusses the mecha-nism of the salt-frost heave under long-term freeze?thaw cycles. The results show that the salt-frost heave can be restrict-ed considerably by loads, and there is a critical load for the salt-frost heave cumulative effect. Under this load, peak values of salt-frost heave approach a constant, and the residual values become 0. There is no longer structure heave or cumulative effect of saline soil exposed to freeze?thaw cycles under the critical load. Taking cumulative effect into account in calcula-tions of salt-frost heave, a salt-frost heave model under freeze?thaw cycles is developed.