In treating the wet and sinking loess roadbeds in Yong-Cheng Expressway by power tamping,the author has made some experiments and studied the power tamping parameters such as one-point tamping force and effective consolidating depth,best tamping force and times,tamping times and intervals,the distance and arrangement of tamping points,and made a summary of the actual construction.

Explicit nonlinear numerical analysis of dynamical performance of dynamic compaction;

Quasi-static analysis for quantitative estimation of improvement effect of cohesionless soil treated by dynamic compaction;

Experimental study on backfill sand foundation by dynamic compaction;

The application of dynamic consolidation in foundation treatment in transformer substation;

The application of dynamic consolidation method in collapsible loess roadbed treatment of expressway;

Construction technology and quality control of dynamic consolidation;

Construction technology of roadbed filling by heavy tamping method in Jishao expressway;

Experimental research on heavy tamping of collapsible loess foundation of airport;

Application of heavy tamping in roadbed treatment;

Several technical problems of strong tamping method in foundation reinforcement;

Attenuation characteristics of the ground vibration caused by strong tamping;

Research purposes: The purposes are to do research on the applicable effects of strong tamping and its replacement technology used for reinforcing composite subgrade of railway passenger dedicated line.

Application of impact compaction in Wanzhou Airport high embankment;

With regard to the field tests of foundation compaction in Pan Zhi Hua airport high embankment,impact method with impact energy of 2000kN·m,3000kN·m and impact compaction spot in shape of 4 equal sides is studied and the consolidation effect of foundation after impact is evaluated.