浅谈旋挖扩底钻孔灌注桩施工应用  

Discussion on the application of the rotary digging under- reamed bored pile in construction

作　　者：陈霄 

机构地区：[1]福建省二建建设集团有限公司,福建福州350003

出　　处：《福建建筑》2015年第12期49-51,90,共4页Fujian Architecture & Construction

摘　　要：旋挖扩底钻孔灌注桩,即旋挖钻机成孔过程中利用扩大钻头将桩端底部扩大成纺锤体形状,形成的扩底桩在不扩大原有桩径的前提下能有效提高桩端的承载力。该工艺经过工程实践,已日趋完善和规范,综合效益良好。Under- reamed piles are formed during the rotary drilling process by using under- reaming bits to enlarge the pile tip bottom into a spindle shape. The bearing capacity of the under- reamed piles can thus be effectively improved without the need of enlarging the pile diameter. The technology which has been tested in engineering practices is constantly maturing and can bring about comprehensive benefits.

关 键 词：旋挖扩底钻孔法 扩底钻头 等直径桩成孔 桩端扩底 

分 类 号：TU74[建筑科学—建筑技术科学]