软土地区超长桩基后注浆施工关键技术

桩基后注浆技术可解决软土地基工程特性差及超长泥浆护壁钻孔灌注桩施工难度大等难题。结合工程实践,介绍了桩基后注浆施工工艺、注浆设备、单向阀及注浆管制作等技术,并重点阐述了施工关键控制技术,建立了一套适合深厚软土地区钻孔灌注桩后注浆施工工艺、质量控制和验收标准,可供软土地区类似工程提供参考。

Post-Grouting Key Construction Techniques for Super-Long Pile Foundation in Soft Soil Area

The post pile grouting can solve both bad engineering characteristics on soft soil foundation and great construction difficulty in super-long bored piles with mud protection. Combined with engineering practice, the writer of the paper introduces and elaborates on construction technology, grouting equipment, check value and grouting pipe manufacture, etc.. And the key construction control technology is emphasized in this article. Thus, the construction technology, quality control and acceptance standards on bored pile post grouting for deep soft soil areas are covered, which can be of references for the similar projects.