1. Ua ntej, chisel qhov chaw xau mus rau hauv cov duab funnel (dav ntawm qhov chaw thiab nqaim hauv) thiab tshem tawm cov khib nyiab.
2. Muab cov dej xau-cov khoom sib khi rau hauv ib lub thawv, ntxiv cov dej uas tsim nyog, thiab sib tov sai sai rau hauv ib lub tais. Yog tias qhov ntsuas kub qis dua 5℃hauv lub caij ntuj no, siv 40℃dej sib tov.
3. Tuav cov hmoov sib tov rau hauv koj txhais tes kom txog thaum koj hnov mob me ntsis, ces nrawm nrawm nroos tiv thaiv qhov xau; tuav nws nyob rau hauv qhov chaw kom txog thaum nws teem. Feem ntau, qhov xau tuaj yeem raug kaw hauv kaum feeb.
4. Tom qab sealing qhov xau, siv txheej txheej ntawm polymer waterproof mortar rau thaj tsam thiab tswj / kho qhov chaw rau peb hnub.
5. Rau cov cheeb tsam uas muaj dej seepage pits, tso cov pa xau- sealing agent ncaj qha rau hauv lub qhov thiab nias kom ruaj khov (piv txwv li, nrog koj txhais ko taw) kom txog thaum cov khoom tawv tawv.
6. Rau cov cheeb tsam uas muaj cov dej xau loj heev, ua ntej chisel lub qhov dej kom txo tau qhov siab ua ntej muab khi; qhov no yuav pab txo cov seepage nyob ib puag ncig. Tom qab ntawd, siv cov txheej txheem dej tsis sib haum- feem ntau yog tsim los ntawm cov khoom sib xyaw ua ke, cov cement clinker, tshuaj ntxiv, cov ntawv khi, thiab ntau yam khoom siv pabcuam- kom tiav qhov chaw.
