Based on the data of domestic and foreign literatures about micropile,the paper recounts the history,the features,application to engineering,the method of construction,the bearing capacity test of single pile,bearing capacity characteristics of group and network micropile as well as behaviors under dynamic loads.

In the case of the worse self-standing soil,the structure of composite soil nailing wall with micro-pile of steel pipe is adopted and analyzed in this paper.

Ground settlement analysis in construction of Push-in Mini-Pile composite foundation;