Advantages and application scope of horizontal directional drilling construction

（1） Advantages of horizontal directional drilling
1. When directional drilling is used for crossing construction, the above ground functions can be used normally. For example, when crossing roads and railways, traffic may not be interrupted; When crossing the river, it can ensure that the river is unblocked without blocking navigation and flood discharge.
2. The trenchless construction reduces the excavation, transportation and stacking of a large amount of engineering soil, which is conducive to environmental protection. At the same time, the cost of foundation burial and ground restoration is reduced accordingly.
3. The construction period is short, the operation is safe and fast, the comprehensive cost is low, and the social benefits are significant. Where excavation cannot be carried out or is not allowed, directional drilling can be used to cross under it. Today, with the rapid development of urban construction, it has higher social and economic benefits to avoid the road zipper project caused by repeated excavation and repair.
（2） Applicable scope of horizontal directional drilling
Horizontal directional drilling is applicable to pipeline crossing works in urban roads, highways, railways, rivers and other sections unsuitable for heavy excavation. It can lay various underground pipelines such as natural gas, heat, tap water, rainwater and sewage, power, telecommunications, cable television, and network. The pipe materials can be mainly divided into steel pipes, PE pipes, aluminum plastic pipes, copper plastic pipes, cables, and optical cables.