Trenchless technology has been more and more application and attention, both its inherent technical advantages, but also the social development of the great desire, custom hdd vermeer housings

The main performance is: underground crossing is the inevitable requirement of social development.

Whether the planning of various sectors is not in place, the coordination is not good, or the need for infrastructure development, the new underground facilities are always increasing, then either excavation or non-excavation, it is inevitable to choose one.

As the advantages of trenchless are gradually recognized by people, trenchless technology is becoming more mature, and the cost of trenchless construction is decreasing year by year, so the application of trenchless is increasing year by year.

Underground pipeline is an important part of urban infrastructure, cable pipe, water pipe network, thermal (power) pipeline and underground railway together, known as the lifeline of the city, with the development of society, the length of underground pipeline continues to increase, on the other hand, China's per capita pipeline is much lower than the western developed countries, The reason why trenchless technology has been applied and paid more and more attention is not only its inherent technical advantages, but also the great desire brought by social development. The main performance is:

(1) Underground crossing is an inevitable requirement of social development. Whether the planning of various sectors is not in place, the coordination is not good, or the need for infrastructure development, the new underground facilities are always increasing, then either excavation or non-excavation, it is inevitable to choose one. As the advantages of trenchless are gradually recognized by people, trenchless technology is becoming more mature, and the cost of trenchless construction is decreasing year by year, so the application of trenchless is increasing year by year. Underground pipeline is an important part of urban infrastructure, cable pipe, water pipe network, heat (power) pipeline together with the underground railway, known as the lifeline of the city, with the development of society, the length of underground pipeline continues to increase, there is a huge growth of the trenchless market.

(2) After the construction of Bridges, buildings and tunnels in trenchless cities with advantages in areas without excavation conditions, it is impossible to excavate and lay pipelines. Although some have surface excavation conditions, because the pipeline is buried too deep and the groundwater level is high, non-excavation becomes the method. The application field of horizontal directional/directional drilling technology is environmental treatment engineering. Pollutants such as some large garbage disposal sites, industrial waste sites, aircraft fuel depots at airports and air force bases, underground fuel storage, oil refineries, gas stations, etc. seep underground under the action of rainwater, contaminating groundwater and soil. Horizontal Wells are drilled in the contaminated area using horizontal directional/guided drilling techniques, and filters are installed inside them to extract contaminated groundwater and prevent further spread of contaminants. In addition, the following treatment methods can also be used: air injection and soil gasification extraction; Recovery of free products (light or heavy non-soluble liquids); Biological treatment (injection of media to speed up the breakdown of contaminants); Extractive leaching and chemical stabilization; Soil layer monitoring and sampling. The ground network is crisscrossing, the underground facilities are interleaving, and the functional division of urban blocks has become an insurmountable obstacle to the construction of conventional engineering, so there is a strong demand for trenchless technology. Obstacles that may be crossed in municipal construction include: existing underground municipal pipe network, subway network, highway network, underground space and underground facilities, buildings, rivers, cultural relics protection sites, etc. The traditional construction method is almost impossible to complete, and the trenchless method is duty-bound.

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