Hauv cov cheeb tsam txias, cov yam ntxwv ntawm pob txha tawg ntawm geomembranes yuav tsum tau txiav txim siab tag nrho. Feem ntau hais lus, cov ntaub ntawv geotechnical muaj peev xwm zam tau qhov kub tsis tshua muaj siab li (-45± 2) degree , thiab qhov nruab nrab txias tshaj plaws nyob rau sab qaum teb yog li ntawm -32 degree . Lub geomembrane tuaj yeem ua tau raws li qhov yuav tsum tau muaj ntawm qhov kub thiab txias tsis kam tiv thaiv kev tawg tsis muaj kev cuam tshuam. Raws li kev kuaj sim, geomembrane plasticity ploj mus thiab brittleness nce qis dua -5 degree . Cov ntaub ntawv qhia tias nws yooj yim tawg tom qab kev cuam tshuam. Cov hauv qab no yog cov kev ceev faj thiab luv luv txoj kev tsim kho geomembrane hauv lub caij ntuj no.
1. Vim muaj kev sib haum xeeb ntawm lub pas dej loj, kev sib haum xeeb ntawm txoj kab nqes pem hauv ntej ntawm txoj kab nqes hauv lub caij ntuj no lub sijhawm ua haujlwm ntawm lub pas dej hauv qab yuav tsum zam, ua rau cov pob txha tawg ntawm geomembrane. Yog li ntawd, lub pas dej da dej yuav tsum tau dov rau hauv cov khaubncaws sab nraud povtseg raws li tus qauv tsim, thiab dej yuav tsum tau tsau tom qab txhua txheej ntawm dov los xyuas kom meej tias lub pas dej ua ke yog compact.
2. Kev siv lub caij ntuj no impermeable geomembrane yog nkig, txhawm rau tiv thaiv lub caij ntuj no vim geomembrane cuam tshuam, geomembrane brittle so, ua rau dej to, yuav tsum zam lub caij ntuj no nteg geomembrane thiab tej zaum yuav ua rau geomembrane cuam tshuam, brittle break dam nto tsim.
3.Impermeable geomemebrane yuav tsum tau splicing los yog txuas nrog ib puag ncig pob zeb ntiv taw phaj, nws zoo ncaj qha cuam tshuam rau impermeable kev ua tau zoo ntawm geomembrane. Ua ntej nteg cov geomembrane, kev tsim kho ntawm cov txheej txheem ntawm cov pob zeb tsis sib xyaw yuav tsum tau ua ua ntej, thiab tom qab ntawd cov dov bale geomembrane yuav tsum tau nteg vertically raws lub pas dej ua ke los ntawm hauv qab mus rau sab saum toj. Lub nteg yuav tsum du thiab nruj yuav tsum yog nruab nrab, thiab li ntawm 1.5 feem pua ntawm qhov seem dav yuav tsum tau tshwj tseg kom tsis txhob muaj kev puas tsuaj.
4. Frost heaving kev puas tsuaj rau hauv ob sab phlu yog ib qho teeb meem tseem ceeb hauv kev tsim kho ntawm qhov chaw txias, uas cuam tshuam ncaj qha rau cov nyhuv anti-seepage thiab kev ua haujlwm zoo ntawm qhov project. txhawm rau tiv thaiv kev puas tsuaj rau hauv ob sab phlu, kev ntsuas dav dav yuav tsum tau coj los ntawm cov kev npaj thiab kev teeb tsa, kev tswj cov dej ntws thiab cov dej ntws tawm, kev tiv thaiv hluav taws xob thiab kev txuag hluav taws xob, cov qauv txheej txheem ntawm ntu, cov khoom siv hauv ob sab phlu, kev tswj xyuas thiab kev saib xyuas. Cov txiaj ntsig tau pom tias qhov tseem ceeb ntawm Frost Heave tsis ua haujlwm yog cov khoom siv hauv av, cov ntsiab lus ntawm cov av noo (cov ntsiab lus noo thiab cov dej hauv av) thiab qhov kub tsis zoo, uas yog qhov tseem ceeb. tsuav yog ib qho ntawm cov xwm txheej no raug tshem tawm, Frost Heave yuav tsis tshwm sim.
5. Rau cov qauv impermeable ntawm geomembrane nyob rau hauv kev sib cuag nrog dej rau ib ntev lub sij hawm nyob rau hauv cov cheeb tsam txias, thermal rwb thaiv tsev hauv ob sab phlu kuj siv tau, uas yog thermal rwb thaiv tsev sandwich yog teem ntawm geomembrane thiab tiv thaiv nto. Cov ntaub ntawv tsim nyog rau rwb thaiv tsev sandwich muaj xws li polystyrene rigid foam board, pumice pob zeb, ceramicized perlite thiab silica shale, thiab lwm yam polystyrene ua npuas ncauj board tau siv los ua thermal rwb thaiv tsev thiab antifreeze nqes hav tiv thaiv reservoir dam thiab thermal rwb thaiv tsev hauv ob sab phlu ntawm cov channel loj.