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.

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.

Study on early-age frozen-heave stress and the compressive strength rule of the concrete at subzero temperature;

In this paper,the equipment was designed and developed by ourselves and the regularity of early-age frozen-heave stress of different proportions concrete at subzero temperature was measured(different w/c,anti-freezing agent and air-entraining,fly ash and slag).

In this paper the equipment was designed and developed by ourselves and early-age frozen-heave stress of control concrete at subzero temperature was measured at the frozen temperature of-5℃,-10℃ and-15℃.

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.