The development of underground engineering will take inevitably severe challenges to geo-technique subject,in which the key geotechnical problems,such as excavation and support of foundation pit,pile-soil interaction,anti-floating of foundation,and deformation of deep foundation.

In view of the problem of deep foundation pits, the fall short of presently calculating method about basal heave stability is indicated.

Problems in analysis on stability of soil nailing walls of weak foundation pits;

Support design and informational management of some deep foundation pit engineering;

The Analysis and Research of the Method of Reaction Force on Elastic Foundation in Excavation Process of Foundation Pit Engineering;

Monitoring and Analysis of Tunnel Structure on Construction of Foundation pit above operating Metro Tunnel insoft soil ground;

incise construction technique for pit prop beam;

Application of semi-parametric model to deep pit horizontal displacement data processing;