PHC桩端软弱层的高压注浆补强处理

南宁某项目二标段9号楼桩基(静压PHC桩)于2012年12月施工完毕,经检测发现2单元中间位置基桩有效桩长较短、桩端土层松散、软弱,承载力达不到设计要求,后采取高压注浆(通过钻孔向桩端粉砂层中压入水泥浆体)技术进行补强处理,成功提高桩承载力。

High pressure grouting reinforcement of the PHC pile end weak layer

Nanning, a project of second section, the ninth building pile foundation (static PHC pile) completed in December 2012, tests showed that the pile length in second unit intermediate position was short, the pile endpiont soil loose, weak, bearing capacity of less than design requirements, after taking the high-pressure grouting (cement slurry through the drill into the pile tip silt layer) technology for reinforcing process, succeeded in raising the bearing capacity of pile.