The design of the guide frame of the tunneling shield for laying communications under the riverbed

Abstract

The article presents the option of improving the working equipment of the tunnel-boring complex for laying underground utilities, including trunk pipelines. The method of trenchless laying of underground utilities, consisting in a combination of methods of horizontal directional drilling and micro-channeling, is proposed. The proposed technology does not require the construction of a preliminary mine and a site for the installation of a drilling machine and allows one to combine in one working step the drilling of a well, the laying of a pipeline, welding and insulation works. Presents calculations aimed at determining the forces of movement of the shield, the definition of the power of the shield, as well as the calculation of the strength of the shield. The technique of carrying out technological operations is demonstrated taking into account the use of the proposed technical solution.

Design Improvement of Cutting Part in Tunneling Shield

“…If the depth of the tunnel is relatively large when a collapsed structure is formed above the shield, the intensity of the vertical rock pressure [9] q h γ = ⋅ , (4) where γ is the average mass of the rock above the shield, t/m 3 ; h is the height of the collapse vault, m.…”

Advancements and Challenges in Power Cable Laying

“…Inclined linear reaction In addition, trenchless HDD technology can be used in areas that are not suitable for development, such as high speeds, electrified railways, and navigable rivers [19,54,55]. HDD is used in the laying of underground cables and submarine cables, and its impact on the environment is relatively small.…”

“…On the other hand, ducting, conduits, and tunnel installation are typically employed for cables with higher voltage levels, such as high voltage (HV), extra-high voltage (EHV), and ultra-high voltage (UHV). Additionally, with the development of technology, laying techniques range from traditional trenching and plowing to horizontal directional drilling (HDD) [19]. HDD is playing an increasingly important role in power engineering applications because of its low social and environmental impact and high construction speed.…”