利用沉井实现穿越管道立体转向的工程实践

Engineering Practice of Stereo Steering of Pipeline at River Crossing by Open Caisson Technology

天然气管道穿越河流采用定向钻穿越结合沉井实现穿越管道立体转向,较好地解决了高地下水位地区的深度开挖问题。阐述沉井的设计、制作和下沉过程的技术要求,介绍了沉井施工中降水与止水方法。

The stereo steering of natural gas pipeline at fiver crossing is realized by directional drill- ing crossing combined with open caisson technology, which better solves the problem of deep excavation in the areas with high underground water level. The tech- nical requirements for design, manufacturing and sink- ing process of the open caisson are expounded. The methods of dewatering and stopping water in the con- struction of the open caisson are introduced.