Horizontal directional drilling rigs are becoming more and more popular in modern construction because they have the advantages of fast construction speed, low construction accuracy, and low cost. They are widely used in pipeline laying construction projects such as water supply, gas, electricity, telecommunications, natural gas, and oil.
Construction characteristics of horizontal directional drilling rig:
1. The directional drilling crossing construction will not hinder traffic, will not damage the green space, vegetation, will not affect the normal life and work order of shops, hospitals, schools and residents, and solve the interference of traditional excavation construction on residents’ lives and traffic. , The environment, the destruction and adverse effects of the surrounding building foundations.
2. The modern traversing equipment has high traversing accuracy, easy to adjust the laying direction and burying depth, and the arc-shaped laying distance of the pipeline is long, which can fully meet the design requirements and bury the depth, and can make the pipeline bypass underground obstacles.
3. The buried depth of the urban pipeline network is generally less than three meters. When crossing the river, the buried depth is generally 9-18 meters under the riverbed. Therefore, the horizontal directional drilling machine is used for crossing, which has no impact on the surrounding environment, does not damage the landform and the environment, and is suitable for environmental protection. Various requirements.
4. When the horizontal directional drilling rig is used to cross the construction, there is no water or underwater operation, which does not affect the navigation of the river, and does not damage the dams and riverbed structures on both sides of the river. The construction is not restricted by the season, with short construction period and high success rate. Construction safety Reliability and other characteristics.
5. Compared with other construction methods, the entry and exit speed is fast, the construction site can be adjusted flexibly, especially in urban construction, it can fully demonstrate its superiority, and the construction area is small, the project cost is low, and the construction speed is fast.
6. When a large river crosses, because the pipeline is buried 9-18 meters below the stratum, there is little oxygen and other corrosive substances in the stratum, so it has the function of natural anti-corrosion and heat preservation, which can ensure the pipeline running time longer.
7. Pre-expanding is to expand the hole to the expected diameter step by step according to 1.3~1.5 times the diameter of the pipe under the condition that the geological conditions and the underground pipeline detection or survey are clear.
