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℃.

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 paper discussed the "frost heave" function of the horizontal frost heaving stress on the retaining wall,analyzed the morphology and formation of the retaining wall horizontal frost heaving displacement,implementation and evaluation of the prevention and control measures on the "frost heave damage".

To probe into the mechanical performances of soil during the freezing,the relationship between frost heaving strain and stress of saturated clay frozen under different constrains was investigated experimentally,and triaxial frost heaving stress-strain relationship was presented.

To control the ground building deformation and displacement due to the ground frost heave,the frost heave effect for the artificial freezing construction should be predicted before the construction process.