对于河流较深无法进行管道穿越的工程，一般采用跨越形式，而大跨度跨越工程多数采用悬索结构形式。
The crossover is a usual pipeline crossing form for some deep rivers those are not able to use a boring- thrust construction method.
在输油管道跨越河流时，其自重荷载大、设计跨度大的特点给工程设计和施工带来了诸多问题。
In oil pipeline's river crossing, the characteristics of heavy load of pipeline's dead weight and large span of design will bring many problems to engineering design and construction.
跨度越大，管道越高。
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