Test analysis of disturbed soil by lateral artificial freezing

Four laterally artificial freezing experiments on disturbed silty clay with water content of 32 % are carried on under the conditions of sine-varying or constant freezing temperature models,with or without water supply. The results show that the laterally freezing velocity of sine-temperature freezing sample is relatively slower than that with constant-temperature freezing. When the freezing state of the sine-freezing samples is relatively steady,the whole temperature field varies with the sine variation of the freezing temperature. The phases of temperature gradients of sine-freezing samples,in the radial direction,lags the phase of the sine-freezing temperature in half period. The frost heave amount of the sine-freezing samples is nearly as much as that of the constant-freezing samples under the same test conditions. Without water supply,the amount of frost heave of the axial-freezing(from top to bottom) sample is larger than that of the one under the same experimental conditions. The impact of the atmosphere temperature(e.g. diurnal amplitude) should be taken into consideration,while lateral-artificial ground freezing is applied.