提高非嵌岩人工挖孔灌注桩承载力的方法一沿桩身设置多个嵌坎

A Method of Increasing the Load-Bearing Capacity of Non-Rock-Inlaid Manual Piles Setting Several Step Flanges along the Pile Shaft

对非嵌岩人工挖孔灌注桩提出采用多节扩头，即沿桩身设置多个嵌坎的方案，对于提高单桩竖向承载力，具有显著的经济技术效益，可拱设计时参考。

A new idea of setting several step flanges or multi-section expansive butts along the pile shaft is presented for non-rock-inlaid manual piles. By this method,the vertical load-bearing capacity of single pile can be increased,and remarkable economic-technical effect can be achieved. This method can be used for design reference.