In this paper,the structural details, construction technology,characteristics,mechanism,and analysis method of bearing capacity of the micropile are introduced.

The main characteristic of a micropile is its small boring diameter, which allows its construction in almost any ground condition with equipment smaller than those used for traditional piles.

Application of micropiles with anti-bending function to retaining and protection of foundation excavation;

Combing with project examples of foundation pit support,the application of micropile in SMW method is introduced from the aspects of the scheme choice of foundation pit support,the design theory of retaining structure,the info-construction course,and so on.

The displacement and internal force of micropile is analysed through building a pile and soil contact effect,and combining with the analytical result of calculation theory.

The analysis of stability of the supporting method of soil nailing wall and mini-pile;

Considered the narrowness of construction site,the stabilization and security of original structure,the mini-pile is used to consolidate the foundation,which is proved successfully during the process of foundation underpinning.

By analysis of the cause of accident, this paper expounds the function of using mini-pile in engineering consolidation.

With many characteristics of micro pile used in building transformation,unequal settlement,shelter collapse,the design formula and configuration of it are proposed.

Several basic static performances about the Φ89 steel-pipe micro pile were analyzed based on the tests.

Researching on the Disturbed Zone for Cutting Bedding High Rock Slope & Calculation Method of Micro-pile;

Study on Caculation Theory for Anti-sliding Structure of Micro-piles;