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Adapter ring
| Глоссарий по проходческим щитам (тоннелингу) |
- In microtunneling, a fabricated ring, usually made from steel, that is mounted on the first pipe of the pipe string. this ring is intended to transfer the jacking force from the microtunnel boring machine’s (mtbm’s) bearing area to the jacking pipe and to create a waterproof seal between the machine and the spigot of the first joint.
- A fabricated ring, usually made from steel, that serves to mate the microtunneling machine to the first pipe section. the purpose of the adapter ring is to create a waterproof seal between the machine and the spigot of the first joint.
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Microtunneling, английский
A construction method to install pipe into the ground with no imposed size limitations provided the following are used during construction:
Fabricated, английский
U-bend, which expands or contracts to compensate for pipe contraction or expansion.
Microtunnel, английский
A remote control method of installing pipes using a fully guided microtunneling machine.
Waterproof, английский
- Водонепроницаемый
- In the building trades, descriptive of any material or construction which is impervious to water.
- A term applied to materials that are impermeable to water; waterproof fabrics have all of their pores closed and are also impermeable to air making them uncomfortable to wear.
- A term applied to materials that are impermeable to water; waterproof fabrics have had all their pores closed and are also impermeable to air and very uncomfortable. water-repellent: a term applied to fabrics that can shed water but are permeable to air and comfortable to wear. these fabrics are produced by treating the material with a resin, wax, or plastic finish that is not completely permanent.
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Buried objects, английский
Items in the ground that can affect mtbm advancement and line and grade control. buried objects that prevent continued advancement along the design path, which includes tolerances, are called obstructions.
Effective stresses, английский
In a saturated mass of soil or rock, the total stress p minus pore water pressure, uw.
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