论文部分内容阅读
滚刀钻头在特殊地层中的应用刘家荣,李洪,刘三意(地矿部勘探技术研究所河北廊坊102849)1工程概况徐州卷烟厂办公大楼工程基础设计直径1.lin钢筋混凝土灌注桩75根,孔深27~30m,入岩3m。岩石为完整石灰岩夹有砂岩,可钻性为5~7级,覆盖层为土...
Application of hob bits in special formations Liu Jiarong, Li Hong, Liu Sanyi (Institute of Exploration Technology, Ministry of Geology and Mineral Resources, Langfang 102849, Hebei, China) 1 Project Overview Xuzhou Cigarette Factory Office Building Project Basic Design Diameter 1. Lin reinforced concrete cast-in-place pile 75 holes, hole depth 27 ~ 30m, into the rock 3m. The rock is a complete limestone with sandstone, drillability of 5 to 7 levels, covering the soil...