If the grouted new technique of pile surroundings and pile toe is adopted, we can increase the load capacity 30 per cents than that of the replacement pile, and economize 20 per cents of the cost.

• 已建多座桥梁工程采用桩周、桩底压浆新工艺的比较分析表明，该工艺可使水下混凝土的用量节省40%25以上，且比传统的钻孔灌注桩可提高承载力30%25以上；