Horizontal directional drilling construction: A new construction technology that combines the directional drilling technology of the petroleum 

industry with traditional pipeline construction methods. It has the advantages of fast construction speed, high construction accuracy, and low cost.

Pipe drawing construction: It is a pipeline buried construction technology that requires no excavation or less excavation.

1. Characteristics

1. The construction technology is simple, highly operable, and easy to organize and implement; after on-site investigation, the crossing line is designed, 

the drill bit and the pipe are connected, the drilling rig is in place, and construction can begin.

2. It does not pollute the environment, does not affect traffic, causes little damage to the ground and strata, and can meet the high environmental protection 

requirements of urban underground pipe network construction.

3. Low cost, significant social and economic benefits, can reduce administrative approval for excavation, facilitate construction organization, and have low

 overall cost.

4. It has good safety. Due to the use of drawn pipe construction, construction personnel perform operations on the ground, avoiding the influence of unfavorable 

construction conditions such as deep foundation pit operations and improving the safety factor.

5. The quality of pipeline connections is good. Because the pipeline connections are all carried out on the ground, single-section pipelines are drawn and laid 

once after they are qualified, which improves the quality of pipeline connections.

6. The construction period is short. Compared with the traditional "trenching and burying pipe method", the construction period is greatly shortened. There is

 no need to transport and stack soil, and only a small amount of mud needs to be transported.