Manhole

i-manhole yi-artifact eyenziwe ngeentlobo ezimbini zeepleyiti:

 ipleyiti ethwele umthwalo: yeyona nto inomlinganiselo omkhulu kwaye, njengoko igama ngokwalo libonisa, lowo unomsebenzi wokuthwala umthwalo.
 ipleyiti yokudibanisa: yiyo edibanisa kwaye ngoko idibanisa iipleyiti ezithwala umthwalo kwaye zibenza badibanise omnye nomnye.

Ngokuqhelekileyo imveliso yensimbi, eyenziwe ngentsimbi eqhelekileyo okanye insimbi engenasici, nangona kungabikho ukunqongophala kwamatyala ezinto ezikhethekileyo kwimeko yokusetyenziswa ngokugqithiseleyo, umzekelo ukuxhathisa i-acids okanye ukushisa okuphezulu.

Kukho iindidi ezimbini ezixhomekeke kwinkqubo yokuvelisa: icinezelwe kunye ne-electrowelded. Iboleka ubukhulu becala kwiindidi ezimbini zokusetyenziswa:

Ibekwe ngokuthe tye: njengesigqubuthelo semingxuma. Kule meko, kubalulekile ukuqonda uhlobo lwesantya sokuhamba:

 iklasi 1: umthamo wabahambi ngeenyawo (600 kg/m²)
 iklasi 2: imoto driveway umthamo
 iklasi 3: ilori drive umthamo
 iklasi 4: umthamo wesithuthi kwilori

Njengoko kulula ukucinga, umthwalo omkhulu ekufuneka i-grill imelane nayo, ubukhulu becala leeplate ezithwala umthwalo.

Umthamo ubalwa nge-kg okanye i-kN ngokwem², kumthamo wabahambi ngeenyawo, okanye kushicilelo lweenyawo kwiigrayiti zendlela yokuqhuba.

Imiswe ngokuthe nkqo : isetyenziselwa ukubiyela, iingqameko kunye neentsimbi zeentsimbi.

Olona nyango luxhaphakileyo lusetyenziswayo olukhuselayo kumhlwa kunye nomhlwa kukuntywiliselwa kwi-zinc etyhidiweyo kumaqondo obushushu aphezulu.