In order to maintain the freshness,color,deliciousness and flavor of foods,the carbon dioxide fast freezing machine has been developed on basis of liquid carbon dioxide spray refrigerating principle,and food may swiftly pass through the ice crystal band by using this machine.

It means that the fast freezing of this shaft is actual.

Study on fast construction technology of Dahuashui RCC High-thin Arch Dam;

Study on Fast Construction Technology for Moxi NO.2 Tunnel;

Research on Fast Construction and Numerical Simulation of Settlement for High Embankment;

Study on potential probing system for rapid construction of vertical shaft;

Analysis of the mechanical effect on rapid construction of super-long soft surrounding rock tunnel with high water content;

Concrete quick construction for shifting the temporary ship-lock to silt sluice in the Three Gorges Project;

Futhermore,the experiences of quick construction of tunnel are accumulated.

Introduce quick construction technology of reinforced concrete oblong assembly culvert following “protecting permafrost soil” principle—winter construction.

Some other construction performances and experiences are introduced and an efficienty way of reaching a high quality and speedy construction in the baserock section of the vertical shafts are also discassed.

The speedy construction with borehole, longhole drilling and blasting method at the freezing baserock section in №2 mine of Xuandong has been introduced.