在我国北方地区的渠道衬砌工程中，存在着因基土冻胀而造成的衬砌破坏问题。
In the canal lining projects in the northern part of China exist some problems concerning lining damage which is caused by frost heave.
由于地下水位高，造成地下水对渠道混凝土板的渗透破坏、冻胀破坏、硫酸盐侵蚀破坏和膨胀土膨胀破坏。
The high level underground water causes damages on the concrete board of the canal such as seep, freezing, sulfate erosion and swelling by swelled ground.
土中水分迁移的动力势问题是探讨水分迁移成冰机理以及研究冻胀、冻土内应力等冻土工程问题的关键所在。
The driving force of moisture migration in soil is the key of discussing the mechanism of freezing ice and frost heave and the stress of freezing soil.
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