孔外爆破处理深孔桩基硬岩斜向孤石施工技术

Technology of Blasting at Hole Outside to Treat a Hard Inclined Boulder Inside a Deep Hole Pile

以京福铁路客专(闽赣段)螺丝排特大桥为工程背景,阐述采用孔外爆破方法处理深孔桩基穿越硬岩斜向孤石的钻孔施工技术;从孤石倾斜方向判定,地质钻机钻孔孔位放样资料计算,爆破设计,直径60 mm PVC塑料管长度计算4个方面阐述孔外爆破处理深孔桩基硬岩斜向孤石施工技术的工艺原理,重点介绍此技术的工艺流程,分析应用此技术所产生的经济、社会和环保效益,以便推广应用。

Taking Luosipai bridge on Beijinging-Fuzhou passenger dedicated railway（Fujian-Jiangxi Section） as the engineering background,this article describes the technology of blasting at hole outside to treat a boulder inside a deep pile in four aspects： determining the direction of inclination of the boulder,calculating the data of drilling holes lofting for geological drilling rig,blasting design,calculating the length ofφ60 mm PVC plastic pipe.The economic,social and environmental benefits of the technology are analyzed for the purpose of popularizing.