在长输管道施工中,经常会遇到河流穿越工程。对于较深河流,挖土机难以开进河床挖沟,又因地下水位较高,采用顶管法施工,很难防水,采用水冲气举法穿越可收到较理想的效果。 In the long-distance pipeline construction, often encounter river through the project. For deeper rivers, excavators are difficult to dig into the ditches of the riverbed, and because of the high groundwater level, the use of pipe jacking construction, it is difficult to waterproof, the use of water and gas move across the law can receive better results.