李  艳，  周  磊，  蒋镇华
(现代设计集团上海建筑设计研究院有限公司，上海200041)

[摘要] 后注浆灌注桩的应用已成为工程界关注的主要问题之一，本文结合上海地区后注浆灌注桩的工程实践，基于已有研究成果和上海软土地区工程地质条件，总结了后注浆灌注桩在上海地区应用的若干经验。本文列出了后注浆灌注桩的常用持力层，分析了合理注浆量和单桩极限承载力的关系，最后通过对比分析了后注浆灌注桩的经济技术指标，为类似工程及进一步研究提供了借鉴。
[关键词] 侧阻端阻增强系数；注浆量；单一桩端注浆；桩端桩侧复式注浆

Experiences of the Application of Post Grouting for Cast-in-site Pile in Shanghai
Li Yan, Zhou Lei, Jiang Zhenhua
( Xian Dai Architectural Design Group, Shanghai Institute of Architectural Design & Research Co. ,Ltd., Shanghai 200041, China)

Abstract: The application of post grouting for cast-in-site pile has been one of the most important problems for engineers to solve with. Based on the research result and the geological condition of soft soil in Shanghai, this article gives several experiences of the application of post grouting for cast-in-site pile in Shanghai. This article gives the supporting layer and the techno-economy, analyses the relation between reasonable quantity of grouting and the bearing capacity. The experiences can be used as a valuable reference for similar projects.
Keywords: side resistance and tip resistance enhanced coefficient, quantity of grouting; tip grouting; side and tip corubined grouting