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穿越河流，农场，以及州界线。
长输管道穿越河流或水网沼泽等地下水位较高地段，必须采取浮力控制措施。
As a long distance pipeline crosses rivers or water network and swamp areas where water tables are higher, buoyancy control measures must be taken.
介绍了输气管道以大开挖方式穿越河流的施工，探讨了降水计算和施工注意事项。
The construction of gas transmission pipeline passing through the Luo River by excavation is introduced, and calculation of reducing the water level and construction attention items are discussed.
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