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水平定向钻敷管技术是一种现代非开挖敷设管道的施工新技术,主要用于各种管道穿越河流、公路、铁路等障碍物。水平定向钻的基本原理是:按预先设定的轨迹钻一个小直径导向孔,随后在导向孔出口端的钻杆头部安装扩孔器回拉扩孔,当扩孔达到要求后,在扩孔器的后端连接旋转接头、拉管头和管道,回拉敷设地下管道。
Horizontal directional drilling pipe technology is a new non-excavation pipeline laid construction technology, mainly used for a variety of pipes through rivers, roads, railways and other obstructions. The basic principle of horizontal directional drilling is to drill a small diameter guide hole according to a preset track, and then install a reamer to pull the reaming hole at the head of the drill rod at the exit end of the pilot hole. When the reaming hole meets the requirement, The rear end of the device is connected to the swivel, pull the pipe head and the pipe, and pull the underground pipe back.