高层建筑冲(钻)孔灌注桩基础设计的探讨

Discussion of the design on punched(drilled) casting pile foundation

本文结合工程实例,对冲(钻)孔灌注桩的持力层选择,承载力的确定,桩底注浆技术等问题作了初步分析讨论,指出以碎块状强风化花岗岩为持力层并加以桩端注浆可明显提高桩的承载力,达到充分利用桩身强度的目的,节约工程造价。

Connecting to the practice of the construction on site,the thesis briefly analyzed of the choice of bearing strata,confirming of the bearing capacity,and post pressure grouting technique at the bottom of the punched casting pile.It states that the technique of punched casting pile by post pressure grouting on the highly weathered fragmental granite can improve bearing capacity of the pile.It can use the strength of a pile fully,and saves the project cost.