灌注桩后注浆技术在卵石层中的应用研究  

Study on Application of the Post Grouting Bored Pile in the Gravel Layer

作　　者：石中明 Shi Zhongming(Fuzhou Planning Design ＆ Research Institute, Fuzhou 350108, Fujian,China)

机构地区：[1]福州市规划设计研究院,福建福州350108

出　　处：《岩土工程技术》2016年第6期310-312,共3页Geotechnical Engineering Technique

摘　　要：灌注桩施工时对土层产生扰动,使桩侧摩阻力和桩端阻力显著变小,为提高单桩承载力,可通过对灌注桩采用后注浆技术减少沉降。工程实例表明,在卵石层中,该技术能够有效地提高单桩的承载力,节约造价,但是对注浆的工艺应进行分析,保证注浆的效果。Bored pile construction will produce disturbance to the soil layeres which will reduce the pile side friction pow- er and end friction power. Post grouting technology is used to improve the bearing capacity of pile and reduce settlement. Ac- cording to an engineering example, the post grouting technology is indicated to be effective to improve the bearing capacity of a pile and reduce the cost. But understanding about the construction technology of the post grouting is needed to ensure the good results.

关 键 词：灌注桩 后注浆技术 卵石层 提高承载力 减少沉降 

分 类 号：TU473.1[建筑科学—结构工程]