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Earth pressure balance machine (epbm)
| Глоссарий по проходческим щитам (тоннелингу) |
Type of microtunnelling machine in which mechanical pressure is applied to the material at the face and controlled to provide the correct counter-balance to earth pressure to prevent heave or subsidence. the term is usually employed where the pressure originates from the main jacking station in the drive shaft or to systems in which the primary counter-balance to the earth pressure is supplied by pressurised drilling fluid or slurry.
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Mechanical, английский
Controlled, английский
- Управляемый; регулируемый
- Управляемый
- Подконтрольный (о предприятиях)
Subsidence, английский
- A sinking of an entire area, in contrast to the settlement of an individual structure. subsill 1. a subsidiary sill member fitted to a window frame; serves as a stop for screens; causes water to drip farther away from the wall surface; also called a sill drip molding. 2. a subsidiary doorsill which is fixed to the groundsill.
- Оседание, опускание. медленное опускание воз душной массы над большой территорией, обычно сопровож ю* is
- The sinking or caving in of the ground, or the settling of a structure to
- A low-lying area of ground formed by subsidence. synonyms:
- A sinking of an area of the earth`s crust due to fluid withdrawal and subsurface pressure decline.
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Closed circuit television (cctv), английский
Video cameras mounted on small tractor devices or sleds and driven or pulled through a pipeline commonly used to inspect repairs and to assess the condition of the pipe.
Drill bits, английский
Tools that excavate soil or rock and faciliate steering at the face of the bore. common types of drill bits used in hdd include slant-face bits, slanted-face rock bits, rotary rock bits, and percussive bits.
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