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Cohesionless soils (noncohesive soils)
| Глоссарий по проходческим щитам (тоннелингу) |
Earth materials containing less than 20 percent soil particles passing the no. 200 sieve. any free-running soil, such as sand or gravel, whose strength depends on friction between particles.
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Containing, английский
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Epb machine, английский
Earth pressure balance tunneling machine, by which mechanical pressure is applied to the material at the face and controlled to provide the correct counterbalance to earth and groundwater pressures in order to prevent heave or subsidence. the term is not applicable to microtunneling systems for which the primary counterbalance of earth and groundwater pressures is supplied by pressurized slurry.
Cohesive soils, английский
Earth materials containing 20 percent or more soil particles passing the no. 200 sieve.
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