THE TECHNIQUE OF PERMANENT ANTIFLOATING ANCHORED PILE

The permanent antifloating anchored pile is used to control the settlement of building foundation.Taken an construction project in Bejing as an example,the key measures in construction are introduced.The beginning time of anchor hole drilling operation is at best controlled in 12~14h in initial stage of the end solidification.The deviation of pile location is controlled less than 10 mm in any direction from the center of jet grouting consolidation body;less than 8% in perpendicularity deviation with the body.For that purpose the type of preceding 3 wings bit is adopted,and the drilling speed is 200 mm/min.