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  2. Tunnel construction - Wikipedia

    en.wikipedia.org/wiki/Tunnel_construction

    Tunnel Construction. Tunnels are dug in types of materials varying from soft clay to hard rock. The method of tunnel construction depends on such factors as the ground conditions, the ground water conditions, the length and diameter of the tunnel drive, the depth of the tunnel, the logistics of supporting the tunnel excavation, the final use and shape of the tunnel and appropriate risk management.

  3. Bertha (tunnel boring machine) - Wikipedia

    en.wikipedia.org/wiki/Bertha_(tunnel_boring_machine)

    Freighter Fairpartner carrying the disassembled tunnel boring machine into the Port of Seattle in April 2013. Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and was the world's largest earth pressure balance tunnel boring machine, [14] at a cutterhead diameter of 57.5 feet (17.5 m) across.

  4. Trench - Wikipedia

    en.wikipedia.org/wiki/Trench

    Automated trench digging on a street in Baku In the civil engineering fields of construction and maintenance of infrastructure, trenches play a major role. They are used for installation of underground infrastructure or utilities (such as gas mains , water mains , communication lines and pipelines ) that would be obstructive or easily damaged ...

  5. Trencher (machine) - Wikipedia

    en.wikipedia.org/wiki/Trencher_(machine)

    A micro trencher is a "small rockwheel" specially designed for work in urban areas. It is fitted with a cutting wheel that cuts a microtrench with smaller dimensions than can be achieved with conventional trench digging equipment. Microtrench widths range from about 30 to 130 mm (1.2 to 5.1 in) with a depth of 500 mm (20 in) or less.

  6. Directional boring - Wikipedia

    en.wikipedia.org/wiki/Directional_boring

    Directional boring machine. Directional boring, also referred to as horizontal directional drilling (HDD), is a minimal impact trenchless method of installing underground utilities such as pipe, conduit, or cables in a relatively shallow arc or radius along a prescribed underground path using a surface-launched drilling rig.

  7. This Knoxville woman has taken her neighbor to court over a ...

    www.aol.com/finance/knoxville-woman-taken-her...

    She's been living with the trench since February of 2024. This Knoxville woman has taken her neighbor to court over a 40-foot-long trench across her backyard — neighbor claims easement exists ...

  8. Invert level - Wikipedia

    en.wikipedia.org/wiki/Invert_level

    Conversely, the obvert level is the highest interior level, and can be considered the "ceiling" level, being the highest level of that sewer. The bottom of the sewer is called the invert from a general resemblance in construction to an "inverted" arch. [2] An inverted arch is a rounded structure with its crown facing in the downward position.

  9. Hydromill trench cutter - Wikipedia

    en.wikipedia.org/wiki/Hydromill_trench_cutter

    Hydromill trench cutter with two cutter wheels at bottom. The hydromill trench cutter is a specialized type of construction equipment designed to dig the narrow but deep trenches used in the casting of slurry walls. Typically, it is a cutter attachment mounted on a crawler crane base machine, with different types of hose handling systems.

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