Therefore, the water-surface crossing with mobile flexible pipelines is often adopted and it is a first choice to cross an innavigable river.

• 软管水面穿越河流具有铺设迅速,检修方便,容易掌握和使用等优点,尤其是对于不通航河流,是软质机动管线临时穿越河流的首选方式。