论文部分内容阅读
一、前言反循环钻机作为无噪音、无振动就地灌注桩施工机械，广泛应用于土木工程、建筑的各种基础工程。最近，为适应建设工程多样化的社会形势，要求以较低成本实施大口径、深孔、硬岩钻进。随之相继研制出了扩底钻机、深孔地下连续墙钻机、硬岩钻机等。此外，石油等储备基地的栈桥工程、横断海湾沿岸道路工程、输电线铁塔基础工程等，采用斜桩的机会不断增加。这次，日立建机公司接受石油储备基地栈桥工程用施工倾角20°斜桩的硬岩反循环钻机订货，趁
I. Introduction Reverse circulation drilling machine as a noise-free, vibration-free cast-in-place pile construction machinery, widely used in civil engineering, construction of various basic works. Recently, in order to adapt to the diversified social situation of construction projects, it is required to implement large-caliber, deep-hole and hard-rock drilling at a relatively low cost. Followed by the development of a bottom drilling rig, deep hole underground continuous wall drilling rig, hard rock drilling rig. In addition, there are increasing opportunities for the use of inclined piles, such as the trestle project at the oil and other reserve bases, the cross-bay coastal road project and the transmission line tower foundation project. This time, Hitachi Construction Machinery Co., Ltd. accepted the orders of the Hard Rock Reverse Circulation Drilling Machine with a tilt angle of 20 ° inclined piles for the construction of the Trestle Bridge Project of the Petroleum Reserves Base