...管道穿越工程；泥浆压力；计算公式；管道回拖力 [gap=982]Key words：horizontal directional drilling technology；pipeline crossing project；mud pressure；computation formula；pipeline back drag force ..
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The pipeline construction in west China gas transported to east China project needs pipeline crossing the Yangtze river at Sanjiangkou port.
根据三江口地质、环境特点，决定盾构施工法为西气东输管道通过长江的推荐方案。
West Pipeline crossing Heihe River is the longest crossing project by a large excavation way and the method of laying both crude oil pipeline and products pipeline in a single trench.
黑河是西部管道工程采用大开挖方式穿越的距离最长的河流， 原油与成品油管道采用同沟敷设方式穿越该河流。
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