综合措施解决特殊条件下钻孔灌注桩承载力问题

Solving the bearing capacity problem of cast-in-situ bored pile under special conditions with comprehensive measures

因工程条件特殊,采用三重管旋喷灌浆及静压注浆工艺对钻孔灌注桩持力层进行加固处理,待灌注桩施工后,再采用静压注浆的工艺对桩周土进行加固,使钻孔灌注桩单桩承载力满足了设计要求。

Due to special engineering conditions, triple-tube jet grouting process and static pressure grouting process were adopted for reinforcement treatment of bear- ing stratum of cast-in-place bore piles. After the construction of bored piles, the static grouting process was then adopted for reinforcement of soil around piles, and the sin- gle pile bearing capacity of cast-in-place bore piles meets the design requirements.