Cov kav dej phwj system tej zaum yuav tsis zoo ua tsis tau txhim kho manhole. Ntsia manholes pab saib xyuas cov lag luam ntawm lub system, yuav ua rau nws cov kev soj ntsuam, ntxuav thiab tu.
Tej dej yog ntsia thoob plaws hauv lub network kev pab them nqi, nws ramifications, bends rau ntawm lub junctions ntawm ob los yog ntau tshaj phwj kab, hloov nyob rau hauv lub gradient thiab txoj kab uas hla ntawm qhov hluav taws xob kav. Nyob rau ib tug ncaj seem ntawm manholes ntsia tau rau hauv raws li muaj feem xyuam qauv thiab cov kev tswj, thiab qhov kev ncua deb ntawm ib tug mus rau lwm lub nyob ntawm txoj kab uas hla ntawm lub qhov hluav taws xob kav. Yog li, yog hais tias tus yeeb nkab yog pw txoj kab uas hla ntawm 150-600 hli, qhov kev ncua deb ntawm nyob ib sab qhov dej yuav tsum muaj tsawg kawg yog 50 meters, txhim kho kav dej nrog ib lub cheeb ntawm 125 hli, qhov no deb yuav tsum tsis txhob yuav ntau tshaj 40 meters.
Ua manholes ntawm ntau yam nrhiav thiab ntau thiab tsawg. Nyob rau hauv daim ntawv lawv yuav ua tau Trapezoidal, ib los yog puag ncig. Tag nrho cov ib txwm yeej dej rau pipelines, qhov twg kav dej uas tso mus rau 500 mm inch, muaj ib lub cheeb ntawm 1000 hli puab qhov chaw uas pub dawb do muab tso rau ib tug neeg ua hauj lwm nqa tawm qhov tsim nyog kho los yog tu ua hauj lwm.
Lub manholes nteg cib. Lawv yuav tsum muaj cov nram qab qhov ntev: ntev tsis tsawg tshaj li ib Meter nyob rau hauv dav nyob rau hauv lub chav 90 cm square rau kev tsim kho ntawm manholes yog siv nyob rau hauv qhuav xau tshuaj cim 100, nyob rau hauv ntub xau - kos 150. Nyob rau hauv lub rooj plaub uas qhov chaw ntawm round manholes. txheem qhob khoom yuav tsis tau rau lub hom phiaj vim li cas, rau lawv siv, siv tshwj xeeb ncaj-cib tsev, uas tso cai rau koj mus tsis tau tsuas yog kom raug ua masonry, tab sis kuj yuav txo qhov khiav ntawm cov tshuaj.
Feem ntau thaum yuav ib lub teb chaws tej thaj chaw deb ntawm kev vam meej ntawm qhov chaw ntawm lub phwj ntaus ntawv muaj saib xyuas ntawm koj tus kheej. Nyob rau hauv cov ntaub ntawv no, rau nws cov koom haum feem ntau haum yas manholes, uas yog npaum li cas me me thiab luj lawv cov installation tsis tas nyiam lifting khoom. Nyob rau nws tus kheej qhov chaw, nyob ntawm seb lub cheeb tsam ntawm sewerage system yog teem nyob rau hauv tib txoj kev raws li lub hauv paus nroog dej system. Sewerage dej yog ntsia ntawm lub network ceg, nws tebchaw, kev hloov nyob rau hauv tus nqes hav thiab txoj kab uas hla. Feature manhole yas yog lub xub ntiag ntawm qhov rau txuas qhov hluav taws xob kav, uas yog tsis nyob rau hauv vaj tse, qhov twg lub qhov muaj mus ua txhaum los ntawm lawv tus kheej. Lwm zoo dua cov lus dag nyob rau hauv lub tiav sealing ntawm lub qhov dej nyob rau hauv lub hauv av kav rau muab thiab khoom lub neej. Ntev lub neej vim lub zoo cov yam ntxwv ntawm cov khoom, uas nyob rau hauv lawv cov kev zog tsis rot, tsis nqus noo noo, ua siab ntev cuam tshuam txhoj puab heev puag ncig uas rau INTERACTIONS thaum lub sij hawm lub lag luam.