全套管回转钻孔液压旋割一次式拔桩施工技术的应用

Application of Full Casing Rotary Drilling Hydraulic Cutting Once Pile Pulling Construction Technique

随着国家建设事业的发展及轨道交通的兴起,地下废桩基或废混凝土基础的清除施工技术的应用也越来越多。针对传统的清桩施工方法存在的诸多缺点,结合工程实践研发新型清桩施工方法。详细阐述了全套管回转钻孔液压旋割一次式拔桩施工技术的适用范围、工艺原理、施工流程及操作要点,并对工程应用实例进行了介绍。

With the development of the national building cause and the rise of rail transit, there are more and more applications of construction techniques to eliminate the underground waste pile foundations or waste concrete foundations. Aiming at many disadvantages existing in the traditional pile eliminating construction method, the new pile eliminating construction methods are researched and developed with the engineering practices. The article sets forth the application range, technological principle, construction process and operation gist of the full casing rotary drilling hydraulic cutting once pile pulling construction technique, and introduces the engineering application practices.