By project case, the paper shows advantages of horizontal directional crossing pipelaying by its construction process and technical requirements.
通过工程实例，介绍水平定向穿越敷管施工工艺和技术要求，借以说明该技术的优点。
2
Calculation for pipelaying resistance in current construction conditions to choose correct pipelaying method is the key for project success in trenchless technology.
在非开挖工程中，计算出当前工艺条件下的铺管阻力、选择正确的铺管方法是整个工程成败的关键。
3
Through the analysis of Conventional Pipelaying Barge, this paper presents a new method and analyses its principle for laying large diameter and thin wall pipeline in shallow water.