Lub pas dej geomembrane
Kev Piav Qhia Luv:
- Cov geomembranes siv rau cov pas dej khaws dej yog ua los ntawm cov khoom siv polymer, feem ntau yog polyethylene (PE), polyvinyl chloride (PVC), thiab lwm yam. Cov ntaub ntawv no muaj cov dej permeability qis heev thiab tuaj yeem tiv thaiv dej kom tsis txhob nkag mus. Piv txwv li, polyethylene geomembrane yog tsim los ntawm cov tshuaj polymerization ntawm ethylene, thiab nws cov qauv molecular yog compact heev uas cov dej molecules tsis tuaj yeem hla dhau nws.
- Cov geomembranes siv rau cov pas dej khaws dej yog ua los ntawm cov khoom siv polymer, feem ntau yog polyethylene (PE), polyvinyl chloride (PVC), thiab lwm yam. Cov ntaub ntawv no muaj cov dej permeability qis heev thiab tuaj yeem tiv thaiv dej kom tsis txhob nkag mus. Piv txwv li, polyethylene geomembrane yog tsim los ntawm cov tshuaj polymerization ntawm ethylene, thiab nws cov qauv molecular yog compact heev uas cov dej molecules tsis tuaj yeem hla dhau nws.
1.Cov yam ntxwv ntawm kev ua tau zoo
- Kev Ua Haujlwm Tiv Thaiv Kev Ntsws:
Qhov no yog qhov kev ua tau zoo tshaj plaws ntawm geomembranes hauv kev siv cov pas dej khaws dej. Cov geomembranes zoo tuaj yeem muaj cov coefficient permeability ncav cuag 10⁻¹² - 10⁻¹³ cm / s, yuav luag tag nrho thaiv txoj kev hla dej. Piv nrog rau cov av nplaum tiv thaiv seepage ib txwm muaj, nws cov nyhuv tiv thaiv seepage yog qhov zoo tshaj plaws. Piv txwv li, nyob rau hauv tib lub taub hau dej siab, qhov ntau ntawm cov dej seeping los ntawm geomembrane tsuas yog ib feem ntawm qhov ntawd los ntawm cov av nplaum tiv thaiv seepage txheej. - Kev Ua Haujlwm Tiv Thaiv Kev Txhaum:
Thaum siv cov geomembranes ntawm cov pas dej khaws dej, lawv yuav raug cov khoom ntse xws li pob zeb thiab ceg ntoo hauv lub cev pas dej. Cov geomembranes zoo muaj lub zog tiv thaiv kev tho. Piv txwv li, qee cov geomembranes sib xyaw muaj cov txheej fiber sab hauv uas tuaj yeem tiv taus kev tho. Feem ntau hais lus, lub zog tiv thaiv kev tho ntawm cov geomembranes tsim nyog tuaj yeem ncav cuag 300 - 600N, kom ntseeg tau tias lawv yuav tsis yooj yim puas tsuaj hauv qhov chaw nyuaj ntawm lub cev pas dej. - Kev Tiv Thaiv Kev Laus:
Vim tias cov pas dej khaws dej muaj lub neej ntev, cov geomembranes yuav tsum muaj kev tiv thaiv kev laus zoo. Cov neeg sawv cev tiv thaiv kev laus raug ntxiv thaum lub sijhawm tsim cov geomembranes, ua rau lawv tswj tau kev ua haujlwm ruaj khov rau lub sijhawm ntev nyob rau hauv kev cuam tshuam ntawm cov yam ntxwv ib puag ncig xws li ultraviolet rays thiab kev hloov pauv kub. Piv txwv li, geomembranes ua tiav nrog cov qauv tshwj xeeb thiab cov txheej txheem tuaj yeem muaj lub neej ua haujlwm ntawm 30 - 50 xyoo sab nraum zoov. - Kev Hloov Kho Deformation:
Lub pas dej yuav raug qee qhov kev hloov pauv xws li kev sib sau ua ke thiab kev hloov chaw thaum lub sijhawm khaws dej. Geomembranes tuaj yeem hloov kho rau cov kev hloov pauv no yam tsis muaj kev tawg. Piv txwv li, lawv tuaj yeem ncab thiab khoov rau qee qhov nrog rau kev sib sau ua ke ntawm lub cev pas dej. Lawv lub zog tensile feem ntau tuaj yeem ncav cuag 10 - 30MPa, ua rau lawv tiv taus kev ntxhov siab los ntawm kev hloov pauv ntawm lub cev pas dej.
kev txawj ntse raws li qhov xav tau ntawm qhov project. Lub thickness ntawm geomembrane feem ntau yog 0.3mm txog 2.0mm.
- Kev Tiv Thaiv: Xyuas kom meej tias geomembrane muaj kev tiv thaiv zoo kom tiv thaiv dej hauv av kom tsis txhob nkag mus rau hauv qhov project.
2. Cov Ntsiab Lus Tseem Ceeb ntawm Kev Tsim Kho
- Kev Kho Mob Hauv Paus:
Ua ntej yuav tso geomembranes, lub hauv paus ntawm lub pas dej yuav tsum tiaj thiab khov kho. Yuav tsum tshem tawm cov khoom ntse, cov nroj tsuag, cov av xoob thiab cov pob zeb ntawm qhov chaw ntawm lub hauv paus. Piv txwv li, qhov yuam kev ntawm lub hauv paus feem ntau yuav tsum tau tswj kom tsis pub dhau ± 2cm. Qhov no tuaj yeem tiv thaiv geomembrane kom tsis txhob khawb thiab xyuas kom meej tias muaj kev sib cuag zoo ntawm geomembrane thiab lub hauv paus kom nws cov kev ua haujlwm tiv thaiv kev seepage tuaj yeem ua tau. - Txoj Kev Tso:
Feem ntau cov geomembranes raug txuas los ntawm kev vuam lossis kev sib txuas. Thaum vuam, nws yog qhov tsim nyog los xyuas kom meej tias qhov kub thiab txias vuam, qhov ceev thiab qhov siab vuam yog qhov tsim nyog. Piv txwv li, rau cov geomembranes cua sov-welded, qhov kub vuam feem ntau yog ntawm 200 - 300 ° C, qhov ceev vuam yog li 0.2 - 0.5m / min, thiab qhov siab vuam yog ntawm 0.1 - 0.3MPa kom ntseeg tau tias qhov zoo vuam thiab tiv thaiv cov teeb meem xau los ntawm kev vuam tsis zoo. - Kev Txuas Sab Nraud:
Qhov kev sib txuas ntawm geomembranes nrog lub hauv paus ntawm lub pas dej, cov roob ntawm ob sab ntawm lub pas dej, thiab lwm yam ntawm ntug ntawm lub pas dej yog qhov tseem ceeb heev. Feem ntau, yuav siv cov qhov anchoring, cov pob zeb capping, thiab lwm yam. Piv txwv li, ib qho anchoring trench nrog qhov tob ntawm 30 - 50cm yog teeb tsa ntawm lub hauv paus ntawm lub pas dej. Ntug ntawm geomembrane yog muab tso rau hauv qhov anchoring trench thiab kho nrog cov khoom siv av compacted lossis concrete kom ntseeg tau tias geomembrane txuas nrog cov qauv ib puag ncig thiab tiv thaiv peripheral leakage.
3. Kev Saib Xyuas thiab Kev Tshuaj Xyuas
- Kev Txij Nkawm Tsis Tu Ncua:
Nws yog ib qho tsim nyog yuav tsum tau kuaj xyuas tsis tu ncua seb puas muaj kev puas tsuaj, kua muag, qhov tho, thiab lwm yam ntawm qhov chaw ntawm geomembrane. Piv txwv li, thaum lub sijhawm ua haujlwm ntawm lub pas dej, cov neeg ua haujlwm saib xyuas tuaj yeem ua qhov kev kuaj xyuas ib hlis ib zaug, tsom mus rau kev kuaj xyuas geomembrane hauv thaj chaw uas qib dej hloov pauv ntau zaus thiab thaj chaw uas lub cev pas dej loj dua. - Cov Kev Tshuaj Xyuas:
Cov txheej txheem sim tsis ua puas tsuaj tuaj yeem siv tau, xws li txoj kev sim hluav taws xob. Hauv txoj kev no, qee qhov hluav taws xob raug siv rau ntawm qhov chaw ntawm geomembrane. Thaum muaj kev puas tsuaj rau geomembrane, cov hluav taws xob yuav tsim tawm, yog li cov ntsiab lus puas tsuaj tuaj yeem nrhiav tau sai. Tsis tas li ntawd, kuj tseem muaj txoj kev sim nqus tsev. Ib qho chaw kaw yog tsim ntawm geomembrane thiab lub cuab yeej sim, thiab qhov muaj nyob hauv geomembrane raug txiav txim siab los ntawm kev soj ntsuam qhov kev hloov pauv ntawm qib nqus tsev.
Cov khoom tsis
