Numerical calculation and experimental study of drilling shaft bottom in special thick alluvium;

Aiming at the status,that there is not theory reference for project determination of shaft line freezing in deep alluvium,in the paper a method which combines the finite element numerical simulation with multi-target gray situation decision-making was brought forward,in order to optimize project determination of deep shaft line freezing.

Concrete mixture ratio research of C80 HPC in extraordinary depth surface soil;

In order to reduce the thickness of shaft lining and increase its bearing capacity and endurance, high-strength and high-performance concrete (HSAHPC) is adopted to construct freezing shaft lining in extraordinary depth surface soil.

In order to ascertain a reasonable strip mining project for the coal mining under villages with thin bedrocks under the thick alluvium in Linhuan, the characters of surface subsidence in strip mining were studied by numerical simulation method based on discrete element.

Numerical simulation on vertical stability critical height of variable cross section drilling shaft in deep alluvium;

Experimental study on high strength composite shaft lining in deep alluvium;