Kev xaiv thiab kev npaj
Thawj kauj ruam hauv kev ua kom lub qhov dej ntws tawm yog xaiv cov khoom tsim nyog. Cov khoom siv feem ntau muaj xws li cam khwb cia hlau, cov khoom sib xyaw, lossis pob zeb. Cam khwb cia hlau manhole npog muaj zog thiab haum rau siab - chaw thau khoom; Cov ntaub ntawv sib xyaw yog lub teeb yuag thiab corrosion- tiv taus, haum rau kev taug kev lossis chaw ntsuab; qhob manhole npog yog tsawg- nqi tab sis hnyav. Xaiv cov khoom tsim nyog raws li kev siv ib puag ncig yog qhov tseem ceeb.
Cov txheej txheem tsim khoom nthuav dav
- Pwm Ua: Tsim cov pwm raws li qhov loj ntawm lub manhole kom paub meej tias lub hau npog qhov sib npaug ntawm qhov qhib manhole.
- Khoom Pouring: Ncuav cov khoom xaiv rau hauv pwm, sau nws tusyees kom tsis txhob muaj npuas lossis voids.
- Curing thiab Demolding: Tom qab cov khoom tau kho tag nrho, ua tib zoo demold thiab xyuas qhov chaw rau flatness.
- Ncej- ua tiav: Polish cov npoo ntawm lub manhole npog kom ntseeg tau tias tsis muaj qhov ntse ntse thaum lub sijhawm teeb tsa.
Cov lus qhia txog kev txhim kho thiab tu
Thaum txhim kho cov kav dej manhole npog, xyuas kom lub hauv paus manhole ruaj khov los tiv thaiv tilting lossis loosening. Tsis tu ncua xyuas lub manhole npog rau kev puas tsuaj los yog tshem tawm, thiab hloov los yog kho tam sim ntawd. Tsis tas li ntawd, cov qauv tiv thaiv -nplaum tuaj yeem raug ntxiv rau saum npoo ntawm lub manhole npog txhawm rau txhim kho kev nyab xeeb thaum taug kev hauv huab cua los nag.
