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The structure of the power head of the horizontal directional drill is generally driven by a high-speed motor to drive the reducer, the reducer drives the power head, and the output shaft of the reducer drives the drill rod to rotate, and the output shaft is hollow. The power head has the following functions: driving the drill bit to rotate; …

1. Project overview The project laid a 63m long, 24-hole telecommunications pipeline in a certain city. This road has a large traffic volume, the road is concrete, and the thickness is about 30cm. Below the concrete cushion, the thickness of the miscellaneous fill is not large, mainly the Quaternary soil layer, and the stratum is rich in water content. As …

What are the methods of trenchless pipeline detection? How should it be applied? Detection method selection According to the detection task and purpose, combined with the field survey and field working conditions, the geophysical prospecting method of this project is selected. 1. Electromagnetic induction method Metal pipelines generally have a medium strength or above (the K value is generally 100×4π×SI～1000×10-6×4π×SI), …

The use of horizontal directional drill crossing technology for pipeline crossing construction is an ideal construction method for completing water and electricity pipeline network construction and communication optical cable laying under the principle of not destroying the landform and protecting the environment in urban municipal construction. In the past ten years, horizontal directional drilling crossing technology has been widely used …

The mud made of non-excavation mud bentonite has a certain protective effect on the borehole wall, and is an indispensable raw material in the construction of the top-drawing pipe. At the same time, bentonite also plays a role in lubricating and maintaining drilling tools and carrying drill cuttings. Therefore, the trenchless mud bentonite is of great significance to the smooth …

AGIT buried pipeline trenchless detection technology A new type of non-destructive testing technology AGIT (The Above Ground Inspection Technology), as a true non-invasive non-destructive testing technology, overcomes the limitations of ILI and ECDA, without the need for pigging and opening In special preparation situations, it is possible to directly assess the pipeline condition from the ground, locate and classify external …

With the acceleration of the urban process in China, the construction of underground pipelines is getting bigger and bigger, and the people’s awareness of environmental protection has increased. Pipe jacking technology is playing an increasingly important role in the construction of underground pipelines. It can pass through urban roads, ground buildings, underground structures and various underground pipelines without large-scale excavation …

The mud used in the construction of horizontal directional drilling rigs in China is mainly composed of bentonite, which is easy to produce hole collapse and stuck drill problems, which causes the failure of horizontal directional drilling. Aiming at the reasons for failure in drilling, drawing on the drilling mud technology of the petroleum industry, combining the changeable surface soil …

As early as around 1600 AD, there were bamboo brine pipes crossing rivers in Sichuan, China. In 1888, the United States used buoys to lay underwater pipelines. Directional drilling pipe laying technology is an advanced pipe laying technology developed abroad in the 1980s. This technology is an advanced non-excavation technology widely used internationally. It uses directional drilling under the soil …

Before the trenchless drilling rig starts construction, the following preparations must be made to ensure the smooth progress of the construction: 1. Construction site detection: Use detection instruments to find out the direction, depth and nature of the original underground pipe network, and make a mark; then verify with the help of municipal archives and manual on-site surveys. 2. Check …

The use of horizontal directional drill crossing technology for pipeline crossing construction is an ideal construction method for completing water and electricity pipeline network construction and communication optical cable laying under the principle of not destroying the landform and protecting the environment in urban municipal construction. In the past ten years, horizontal directional drilling crossing technology has been widely used …

We often find that roads are often dug up in the cities where we live. Whether it’s a newly built road or a road that has been used for a period of time, we always feel that the roads around the place of residence are not complete. They are excavating and repairing every day to allow travel at all. It …