不断完善在利用打钻法钻出的孔道中敷设管线的工艺,实现干管在河流、湖泊、大陆架地区的水下穿越,乃是这一领域内科技进步不断发展的方向之一。这种工艺包括:在障碍物的下面钻一个弯曲的孔道;再将孔道的直径扩大到所需的尺寸;最后敷设管线。与传统的方法相比,打钻法有一系列的优越性:避免了昂贵的水下土方工程;不必对管线压载进行稳定处理;在施工和使用期均不污染水域;钻孔和建安工程在全年均可进行,这对于我国的西西伯利亚地区是有着极其重大意义的。应该指出,此种方 Continuously improving the process of laying pipelines in the tunnels drilled by the drilling method to realize the underwater crossing of the pipelines in the rivers, lakes and continental shelf areas is one of the directions for the continuous advancement of science and technology in this field. The process consists of drilling a curved tunnel under the obstacle, expanding the tunnel to the required size, and finally laying the pipeline. Compared with the traditional method, drilling method has a series of advantages: avoiding expensive underwater earthworks; do not have to stabilize pipeline ballast; during the construction and use of the period does not pollute the waters; drilling and construction engineering in This can be done throughout the year, which is of great importance to our country’s West Siberia. It should be pointed out that such parties