manhole


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Related to manhole: inspection chamber

manhole

1. a shaft with a removable cover that leads down to a sewer or drain
2. a hole, usually with a detachable cover, through which a man can enter a boiler, tank, etc.

Manhole

 

a structure in a sewer network used for inspecting, cleaning, and flushing the sewers.

The manhole usually consists of a work area and, above it, an entrance area, a hatchway, and a lid. There are inspection manholes, drop shafts, and flushing shafts. Among the inspection manholes there are line shafts, built at straight sections of the sewer network; corner shafts, where the line changes direction; juncture shafts, where several lines come together; and control shafts, where the networks draining individual buildings or city blocks join the street network. Drop shafts are built where there is a substantial difference between the levels of the delivery pipes and drain pipes. Flushing shafts are used in flushing out the sediments that form in pipes carrying effluents with a slow rate of flow.

In cross section, manholes are either round or rectangular. They are built predominantly from prefabricated reinforced-concrete rings and panels. Sometimes they are brick.

IU. M. LASKOV

manhole

[′man‚hōl]
(engineering)
An opening to provide access to a tank or boiler, to underground passages, or in a deck or bulkhead of a ship; usually covered with a cast iron or steel plate. Also known as access hole; manhead.

manhole

manhole
A covered opening in a street which provides access for cleaning and repairing of a sewer beneath, or for repairing a conduit for electric underground piping or electric cables.
References in periodicals archive ?
The company chooses the manholes where it will install sensors based on analysis of its underground electrical delivery equipment.
Residents are already upset and have sought action from the Works Ministry, which thankfully has replaced the stolen manhole covers," Mr Abdulaziz said.
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The official said municipality workers are aware of the dangers of gases coming out of manholes.
Each barrel of the manhole will then be lowered--one at a time--onto the invert or base level of the manhole.
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The Town of Vail has rolled out a new "Own a Piece of Vail" product line, called Vail Manhole Cover Jewelry.
It actually lifted the manhole cover up while it was flowing out,'' said Deputy Mike Redding, who attempted to force the manhole cover back into place before cleanup crews arrived.
Faced with Soaring Material Costs, LeBARON Foundry Streamlined Designs, Lightening Manhole Covers and Frames by as Much as 50 Pounds