Through analyzing and researching on engineering static loading test results for three kinds of piles which are jet-grouted pile,jet-grouted-placed reinforcing cage pile and jet-grouted-planted pile,this paper probes into effective ways to increase single pile bearing capacity of jet-grouted pile.

In constructing filling pile,the reinforcing cage was fixing up by exoscopic bolting steel bars and colligating with concrete bearing block.

Long spiral inverse steel reinforcement cage foundation piles construction technology;

Reasons caused the uplift of steel reinforcement cage and preventive measures;

Continuous concrete wall steel reinforcement cage lifting design;

The following paper introduces technical performance and main characteristics of bored cast-in-situ pile,illustrates its construction technique from boring hole,cleaning hole and hanging steel cage,discusses its concrete application in project,and points out that its range of application will be more and more enlarged.