Analysis on Key Technology of Sinking Shaft by Freezing Method in Special Thick Alluvium

Around the optimum design of freezing shaft wall and freezing method of surface soil,new high-strength shaft wall of freezing method,normal material and technology of construction,ultra-deep frozen-tube drilling,deviation measuring and rectiflcation method,the application of infirmation construction,satisfies the needs of security construction,and practice experience for freezing method construction in deep and thick layer are supplied.