(1) Txhawm rau kom ntseeg tau tias cov yeeb nkab hauv qab yog nyob ze nrog lub hauv paus thiab tswj cov axis nce thiab txoj kab nqes ntawm cov kav dej, PVC-U kav dej yuav tsum tseem siv los ua lub hauv paus cushion.Feem ntau, tsuas yog ib txheej ntawm 0.1M tuab xuab zeb cushion tuaj yeem ua rau cov av dav dav.Rau cov av mos, thaum qhov zawj hauv qab yog qis dua cov dej hauv av, ib txheej ntawm gravel lossis gravel nrog lub thickness tsis pub tsawg tshaj 0.15m thiab gravel particle loj ntawm 5 ~ 40mm yuav tsum tau paving, thiab ib txheej ntawm xuab zeb cushion nrog. lub thickness ntawm tsis tsawg tshaj li 0.05m yuav tsum tau paving rau nws los pab txhawb lub stability ntawm lub hauv paus.Ib qho zawj yuav tsum tau tshwj tseg ntawm qhov sib txuas ntawm lub qhov (socket) thiab lub qhov (socket) ntawm lub hauv paus kom yooj yim rau kev tso chaw ntawm lub qhov (socket), thiab tom qab ntawd rov qab nrog cov xuab zeb tom qab kev teeb tsa.Lub kaum sab xis ntawm cov yeeb nkab hauv qab thiab lub hauv paus yuav tsum tau ntim nrog cov xuab zeb ntxhib los yog cov xuab zeb nruab nrab kom nruj nreem qhwv ib feem ntawm cov yeeb nkab hauv qab los tsim kev txhawb nqa zoo.
(2) Feem ntau, cov kav dej yog ntsia manually.Cov kav dej uas muaj qhov tob tshaj 3m lossis cov yeeb nkab txoj kab uas hla ntau dua dn400mm tuaj yeem nqa mus rau hauv qhov zawj nrog cov hlua uas tsis yog xim hlau.Thaum txhim kho lub qhov (socket) yeeb nkab, lub qhov (socket) yuav tsum tau muab tso rau raws li cov dej ntws cov kev taw qhia thiab lub qhov (socket) yuav tsum tau muab ntsia rau ntawm cov dej ntws kev taw qhia ntawm downstream mus rau sab sauv.Qhov ntev ntawm cov yeeb nkab tuaj yeem txiav nrog ib txhais tes pom, tab sis cov seem yuav tsum tau khaws cia ntsug thiab tiaj tus yam tsis muaj kev puas tsuaj.Kev teeb tsa ntawm cov yeeb nkab me me tuaj yeem nqa tawm manually.Ib tug ntoo baffle yog teem rau ntawm cov yeeb nkab kawg, thiab cov yeeb nkab ntsia tau raws li cov axis thiab muab tso rau hauv lub qhov (socket) nrog lub crowbar.Rau cov kav dej uas muaj txoj kab uas hla ntau dua dn400mm, tes hoist thiab lwm yam cuab yeej siv tau, tab sis kev tsim tshuab yuav tsum tsis txhob siv los quab yuam cov kav dej hauv qhov chaw.Lub nplhaib roj hmab yuav tsum yooj yim rau kev khiav lag luam thiab cov nyhuv sealing ntawm lub nplhaib roj hmab yuav tsum tau them sai sai rau.Cov nyhuv sealing ntawm lub nplhaib nplhaib yog tsis zoo, thaum lub sealing nyhuv ntawm tshwj xeeb-shaped roj hmab nplhaib nrog me me deformation kuj thiab tiv thaiv dov yog zoo dua.Ordinary bonding interface tsuas yog siv tau rau cov kav dej hauv qab dn110mm.Lub ribbed winding yeeb nkab yuav tsum siv cov yeeb nkab sib koom ua ke thiab cov nplaum tshwj xeeb uas tsim los ntawm cov chaw tsim khoom los xyuas kom meej qhov kev sib tshuam zoo.
(3) Kev sib txuas yooj yim yuav tsum tau txais kev pom zoo rau kev sib txuas ntawm cov kav dej thiab tshuaj xyuas kom zoo, thiab cov kav hlau txuas txuas tuaj yeem siv rau kev sib txuas.Precast qhob dab tshos kuj siv tau rau kev sib txuas.Lub pob zeb dab tshos yog tsim nyob rau hauv cov phab ntsa ntawm kev soj ntsuam zoo, thiab cov phab ntsa sab hauv ntawm lub dab tshos thiab cov yeeb nkab yog kaw nrog cov roj hmab rings los tsim ib qho kev sib txuas yooj yim.Kev sib koom ua ke ntawm cov cement mortar thiab PVC-U tsis zoo, yog li nws tsis tsim nyog los tsim cov kav dej lossis cov yeeb nkab fittings ncaj qha rau ntawm phab ntsa tshuaj xyuas.Cov txheej txheem txheej nruab nrab tuaj yeem raug saws, uas yog, siv txheej txheej ntawm cov nplaum nplaum sib npaug ntawm cov yeeb nkab PVC-U, thiab tom qab ntawd nphoo ib txheej ntawm cov xuab zeb qhuav rau nws.Tom qab kho rau 20min, cov txheej txheem nruab nrab nrog ntxhib nto tuaj yeem tsim.Nws tuaj yeem ua rau hauv kev tshuaj xyuas zoo kom ntseeg tau tias muaj kev sib xyaw ua ke zoo nrog cov cement mortar.Rau cov pits, pas dej thiab thaj chaw mos av, txhawm rau txo qhov tsis sib xws ntawm cov kav dej thiab kev soj ntsuam zoo, ib txoj hauv kev zoo yog thawj zaug txuas cov yeeb nkab luv luv tsis pub tshaj 2m nrog kev soj ntsuam zoo, thiab tom qab ntawd txuas nrog tag nrho. cov yeeb nkab ntev, thiaj li tsim kom muaj kev hloov pauv ntawm kev sib haum xeeb sib txawv ntawm qhov kev soj ntsuam zoo thiab cov kav dej.
(4) Cov yeeb nkab hloov tau rau trench backfilling bears lub load raws li kev sib koom ua haujlwm ntawm cov yeeb nkab thiab av.Cov khoom siv rov qab thiab cov compactness ntawm trench backfilling muaj kev cuam tshuam zoo rau kev deformation thiab kev muaj peev xwm ntawm cov kav dej.Qhov loj dua qhov deformation modulus thiab qhov siab dua qhov kev sib tw ntawm cov khoom siv rov qab, qhov me dua qhov deformation ntawm cov kav dej thiab qhov muaj peev xwm ntau dua.Kev tsim thiab kev tsim kho yuav tsum ua tib zoo txiav txim siab raws li cov xwm txheej tshwj xeeb.Ntxiv nrog rau cov kev cai dav dav ntawm cov kav dej engineering, trench backfilling yuav tsum tau siv cov kev ntsuas tsim nyog raws li cov yam ntxwv ntawm PVC-U yeeb nkab.Lub backfilling yuav tsum tau nqa tawm tam sim ntawd tom qab lub installation ntawm pipeline, thiab nws yuav tsum tsis txhob tso tseg rau lub sij hawm ntev.Cov ntaub ntawv rov qab nyob rau hauv 0.4m los ntawm cov yeeb nkab hauv qab mus rau cov yeeb nkab saum toj yuav tsum tau tswj nruj me ntsis.Crushed pob zeb, gravel, nruab nrab xuab zeb, coarse xuab zeb los yog excavated zoo av yuav siv tau.Thaum lub raj xa dej nyob hauv qab txoj kev tsheb thauj mus los thiab txoj kev pavement tau tsim tom qab tso, qhov cuam tshuam ntawm trench backfilling kev daws teeb meem ntawm cov qauv pavement yuav tsum raug txiav txim siab.Qhov ntau ntawm cov yeeb nkab hauv qab mus rau sab saum toj ntawm cov yeeb nkab yuav tsum tau rov qab thiab compacted nrog nruab nrab thiab ntxhib xuab zeb los yog pob zeb chips hauv txheej.Txhawm rau kom muaj kev nyab xeeb ntawm cov raj xa dej, nws tsis raug tso cai tamp hauv 0.4m saum cov yeeb nkab saum toj kawg nkaus nrog tamping tshuab thiab cov cuab yeej.Lub compaction coefficient ntawm backfilling yuav tsum ntau dua los yog sib npaug li 95% ntawm cov yeeb nkab hauv qab mus rau cov yeeb nkab saum;Ntau tshaj 80% nyob rau hauv 0.4m saum cov yeeb nkab saum;Lwm qhov chaw yuav tsum ntau dua lossis sib npaug li 90% Thaum lub sij hawm tsim kho nyob rau hauv lub caij los nag, kuj yuav tsum tau them nyiaj mloog kom tsis txhob muaj dej hauv cov trench thiab ntab ntawm cov kav dej.
(5) Kev ntsuas dej kaw lossis kaw cov roj ntsuas tuaj yeem siv rau kev tshuaj xyuas nruj tom qab kev teeb tsa cov kav dej.Kev ntsuas cua kaw yog qhov yooj yim thiab nrawm, uas yog qhov tsim nyog tshaj plaws rau kev tsim kho ceev ceev ntawm PVC-U pipeline.Txawm li cas los xij, tsis muaj cov qauv tshuaj xyuas thiab cov cuab yeej tshuaj xyuas tshwj xeeb tam sim no, uas yuav tsum tau kawm ntxiv.Qhov nruj ntawm PVC-U pipeline yog zoo dua li ntawm cov kav dej ua vaj tse, thiab cov roj hmab nplhaib sib txuas zoo tuaj yeem tiv thaiv cov dej ntws tawm.Yog li ntawd, qhov tso cai rau kev kaw dej kaw ntawm PVC-U kav dej yog nruj dua li cov kav dej ua vaj tse, thiab tsis muaj kev cai tshwj xeeb hauv Suav teb.Tebchaws Asmeskas tau hais tias qhov xau ntawm 24h ib km ntawm qhov ntev ntawm cov kav dej yuav tsum tsis pub tshaj 4.6l ib hli yeeb nkab txoj kab uas hla, uas tuaj yeem siv rau kev siv.
Lub sij hawm xa tuaj: Mar-16-2022