摘要
通过某高层建筑基础加固实例,介绍一种先在建筑物筏板钻小直径孔(Φ150),然后利用锚杆扩孔技术在筏板下施工较大直径(Φ400)桩基础的建筑基础加固方法,该加固方法对原基础的损伤小,成桩直径可控,单桩承载力高,加固速度快,工程实例表明,加固效果理想。
In a case study of the foundation rehabilitation of a high-raised building, small diameter （Φ=150mm） boreholes were drilled through the mat foundation. These boreholes were expanded into large diameter （Φ= 400 mm） east-in-situ concrete piles by utilizing the soil anchor borehole enlargement techniques. This method has the advantages of minimizing the existing foundation damage; controllable pile diameter; reliable single pile capacity; and fast construction. The case study suggests this method has good foundation improvement results.
出处
《土工基础》
2011年第5期20-22,26,共4页
Soil Engineering and Foundation
基金
广东省交通厅科研项目:200709
关键词
锚杆扩孔技术
基础加固
borehole enlargement, foundation rehabilitation
