The research on this problem becomes more and more instant for the temperature field research on cup-shaped freezing soil wall is not understood in domestic.

After thawing out of the frozen wall,Guqiao Auxiliary Shaft is grouted and blocking water,pouring water is restricted in the allowable range,whic can provide a successful references to the mine construction of similar stratum.

Explosion effects and characteristic analysis of frozen soils;

Detection by acoustical method on the physical and mechanical character of frozen soil;

The results indicate that adoption of this direct-embedded foundation where soil-sand is in place of frozen ground can avoid heaving e.

In seasonally frozen ground regions as well as permafrost regions,active layer is the most active terrane in terms of thermodynamics.

In this paper the bearing capacity experiment of pile foundation had been done In the frozen ground region of Qinghai-Tibet Railway.

Dynamic strength of frozen soils;

The factors affecting the resistivity of frozen soils were discussed, and some solutions to grounding for lightning using grounding modules were introduced.

The authors have developed succeedly a kind of 500 kHz 1- 3 composite broadband ultrasonic transducer used for measuring longitudinal wave and transverse wave in frozen soils.