Analysis on effect of pre-increasing load on the clay normal frozen-heave force

The relationships between the normal frozen-heave force produced in the frozen-heave process of low liquid-limit clay and the factors,such as clay temperature,water content,dry density and frozen-heave ratio,were analyzed based on the normal frozen-heave force experiment of zero displacement balance method and numerical statistics method.

Combining with a manual berth project in frozen area park,frictional resistance and uplift displacement of piles induced by tangential frozen heaving force are decided by in-site test.

This paper analyzes the function process of frost heaving pressure which causes the quality problem of "upward freezing pulling" about shipway pile foundation,and research to conduct experiment survey on application effect of the developed engineering prevention measures.

The design of frozen wall in deep alluvium is a difficult problem of freezing shaft sinking, at present, few research have reported in detail on the characteristic of frozen wall with loopy freezing pipe, not to mention the characteristic of its temperature field, moisture field and frozen-heave force of it.

The conclusion is that the frozen-heave force is most lager between center tubes , then outer tubus and inner tubus.