顶管是岩土工程中一种现代的管道敷设施工方法,目前在修建地下水道、工业地下管道、地下人行通道、穿越铁路、公路和河流的通道等地下工程时,为避免对地下、地面构筑物的破坏以及影响交通等问题,国内外已采用了顶管施工技术.水下长距离顶管是指直接在地下水位以下的土层中,长距离顶进管道的一种顶管法施工手段。它是一种条件复杂、工程难度大、需要综合技术方法施工的顶管工程.采用水下长距离顶管方法敷设管道无需开糟或水下挖泥,并可避免为敷设管道而进行的辅助工程一 Pipe jacking is a modern pipe laying method in geotechnical engineering. At present, when underground works such as underground waterways, industrial underground pipes, underground pedestrian passages, crossing railways, highways, and river passageways are being constructed, underground and ground structures are avoided. Destruction and the impact of traffic and other issues, has been adopted at home and abroad pipe jacking construction technology. Underwater long-distance pipe jacking is directly under the groundwater level in the soil layer, a long distance into the pipe of a pipe jacking method of construction. It is a pipe jacking project with complex conditions, high engineering difficulty and requiring comprehensive technical method construction. The underwater long-distance pipe jacking method is used to lay the pipe without opening or underwater dredging, and it can avoid the assistance for laying pipelines. Project One