Keɓewa yana nufin shimfiɗa takamaiman geosynthetics tsakanin nau'ikan geomaterials daban-daban guda biyu don guje wa haɗuwa. Geotextiles sune kayan rufewa na farko na zaɓi. Babban ayyuka da filayen aikace-aikacen fasahar keɓewar geotextile sun haɗa da abubuwa masu zuwa:
(1) A cikin aikin layin dogo, an saita geotextile tsakanin ballast da ƙasa mai tushe mai kyau; Kwanciyar geotextile tsakanin katifaren titin da aka girka da ƙasa mai laushi mai cike da tushe shine yanayin keɓewar geotextile.
(2) A cikin injiniyan ƙasa na babbar hanya, ana sanya geotextiles a tsakanin matashin matashin tsakuwa da tushe mai laushi, ko tsakanin magudanar ruwan magudanar ruwa da tushen ciko don guje wa haɗuwa da kayan ƙasa mai kyau da kuma tabbatar da kauri mai ƙira. -grained abu Layer. da cikakken aiki.
(3) A cikin wuraren da ke da babban matakin ruwa na ƙasa, fasahar keɓewar geotextile wani ma'auni ne mai inganci don sarrafa hanyar da layin dogo da ke jujjuya laka.
(4) Sanya geotextile a ƙarƙashin matashin tsakanin ginin ko tsari da tushe mai laushi na ƙasa na iya taka rawar keɓewar girgizar ƙasa.
(5) Katangar ruwa na geotextile na iya toshe tashar ruwa ta capillary. A wasu wuraren da ke da babban tebur na ruwa, ana iya amfani da shi don hana ƙasa salinization ko tushen sanyi.
Lokacin da aka yi amfani da geotextiles a cikin ƙirar keɓewar girgizar ƙasa, ba kawai matsalar “keɓewa” ce mai sauƙi ba. Daga rawar da aka ambata a sama na keɓewar keɓancewar geotextile, ya kuma haɗa da ayyukan juyar da tacewa, magudanar ruwa da ƙarfafa geotextiles a aikace-aikacen injiniya mai amfani. Don haka, lokacin amfani da fasahar keɓewar geotextile, ya zama dole a bincika takamaiman yanayin aikin injiniya daga fannoni da yawa. Bugu da ƙari, kayan aikin jiki da na injiniya na geotextile, yana da muhimmanci a yi la'akari da ko geotextile yana da buƙatar juyawa da magudanar ruwa.
Sauran abubuwan keɓantawar seismic da aka saba amfani da su sune geomembrane, haɗe-haɗe geotextile, haɗaɗɗen geomembrane, polyurethane da polyurea sabon Layer keɓewar geotextile, da dai sauransu. Geotextiles waɗanda aka ƙarfafa ta saƙa, waɗanda ba saƙa ko masana'anta ana kiran su hada-hadar geotextiles. Geotextile ne wanda ya ƙunshi abubuwa biyu ko fiye da haka. Ba wai kawai yana riƙe fa'idodin abu mai Layer guda ɗaya ba kafin haɗawa, amma kuma yana haɓaka lahaninsa zuwa digiri daban-daban. Lokacin da ake amfani da shi, abubuwan da ke cikin sa na iya ba da cikakkiyar wasa ga fa'idodin ƙarin ayyuka, kuma suna iya cika buƙatun na musamman na aikin.
Haɓaka saurin haɓaka kayan polymer ya aza harsashi don bullowar sabbin kayan keɓewar injiniyan farar hula. Polyurethane polymer abu ne polymer mai dauke da kungiyoyin urethane a kan babban sarkar kwayoyin. Toshe polymer wanda sarkar kwayar halitta ta ƙunshi yanki mai laushi da tsaka-tsakin tsaka-tsakin yanki mai wuya. Elastomer da aka samar da kayan polyurethane tare da kyawawan kaddarorin rheological bayan warkewa yana da ikon daidaitawa nakasawa, aikin haɗin gwiwa da rashin ƙarfi, kuma ƙarfin matsawa yana da girma kuma daidaitacce. Polyurea abu ne na polymer wanda aka samo ta hanyar amsawar bangaren isocyanate da bangaren amino fili. Kayan yana da matukar hydrophobic kuma yana da rashin jin daɗi ga zafi na yanayi. Har ma ana iya fesa shi a ruwa don samar da fim. Yana iya aiki kullum a ƙarƙashin matsananciyar yanayin muhalli. Sabili da haka, polyurethane da polyurea sun zama sabon nau'in kayan shinge a cikin maganin sababbin gadoji da cututtuka na hanya.
Lokacin aikawa: Maris-10-2022