Shenzhen ndi umodzi mwamizinda yambiri yaku China yomwe ili panjira yofulumira kwambiri.Mosayembekezereka, kukula kwachangu kwa mafakitale ndi nyumba za mzindawu kwadzetsa mavuto ambiri azachilengedwe.The Hong Hua Ling Landfill ndi gawo lapadera lachitukuko cha Shenzhen, chifukwa malo otayirako samawonetsa zovuta zomwe zidachitika kale mumzindawu komanso momwe tsogolo lake likutetezedwa.
Hong Hua Ling wakhala akugwira ntchito kwa zaka zambiri, kuvomereza mitundu yambiri ya zinyalala, kuphatikizapo mitundu ya zinyalala zomwe zimaonedwa kuti ndizovuta kwambiri (mwachitsanzo, zinyalala zachipatala).Kuti akonze njira yakale imeneyi, kuwonjezereka kwamakono kunafunika.
Mapangidwe okulitsa malo otayirako 140,000m2 athandiza kuti malowa azitha kusamalira pafupifupi theka la zinyalala zonse za m'dera la Shenzhen's Longgang, kuphatikizapo kuvomereza zinyalala zokwana matani 1,600 tsiku lililonse.
KUPULUKA KWA NTCHITO KU SHENZHEN
Dongo lotukulidwali poyamba linapangidwa ndi mizere iwiri, koma kufufuza kwa nthaka kunapeza kuti dongo lomwe linalipo la 2.3m - 5.9m lokhala ndi mphamvu zochepa likhoza kukhala ngati chotchinga chachiwiri.Njira yoyamba, komabe, inkafunika kukhala yankho lapamwamba kwambiri la geosynthetic.
HDPE geomembrane anatchulidwa, ndi 1.5mm ndi 2.0mm wandiweyani geomembranes osankhidwa ntchito m'madera osiyanasiyana.Akatswiri a polojekitiyi adagwiritsa ntchito maupangiri ambiri popanga zisankho zakuthupi ndi makulidwe awo, kuphatikiza CJ/T-234 Guideline on High Density Polyethylene (HDPE) for Landfills ndi GB16889-2008 Standard for Pollution Control on the Landfill Site for Municipal Solid Waste.
Ma geomembranes a HDPE adagwiritsidwa ntchito ponseponse pamalo otalikirapo.
Pansi pake, liner yosalala idasankhidwa pomwe chojambulidwa, chopangidwa bwino cha geomembrane chasankhidwira madera otsetsereka pamwamba pa geomembrane yopangidwa ndi co-extruded kapena sprayed-on structured surface geomembrane.
Ubwino wa mawonekedwe amakangana ntchito ndi ia chifukwa cha kapangidwe ndi homogeneousness wa nembanemba pamwamba.Kugwiritsiridwa ntchito kwa HDPE geomembrane iyi kunaperekanso zopindulitsa zogwirira ntchito ndi zomangamanga zomwe gulu lopanga zomangamanga linkafuna: kukana kupsinjika kwakukulu, kutsika kwa Melt Flow Rate kuti athe kugwiritsira ntchito kuwotcherera mwamphamvu, kukana kwambiri kwa mankhwala, ndi zina zotero.
Ukonde wa ngalande unkagwiritsidwa ntchito ngati chigawo chodziŵira kuti madzi akutuluka komanso ngati mizere ya ngalandeyo pansi pa aggregate.Zigawo za ngalandezi zimakhalanso ndi ntchito ziwiri zoteteza geomembrane ya HDPE kuti isawonongeke.Chitetezo chowonjezera chinaperekedwa ndi wosanjikiza wolimba wa geotextile womwe uli pakati pa HDPE geomembrane ndi dongo lochindikala.
VUTO LAPALEKEZO
Ntchito yomanga ku Hong Hua Ling Landfill inachitidwa pa ndandanda yolimba kwambiri, chifukwa cha kukakamizidwa kwa dera lomwe likukula mofulumira kuti kuwonjezereka kwakukulu kwa nthaka kukugwira ntchito mwamsanga.
Ntchito zoyamba zidachitidwa ndi 50,000m2 ya geomembrane poyamba, kenako 250,000m2 yotsala ya geomembranes yofunikira idagwiritsidwa ntchito pambuyo pake.
Izi zidapanga chenjezo pomwe opanga osiyanasiyana opanga HDPE amafunikira kuwotcherera palimodzi.Mgwirizano mu Melt Flow Rate unali wovuta kwambiri, ndipo kusanthula kunapeza kuti ma MFRs a zipangizozo ndi ofanana mokwanira kuti ateteze mapanelo kusweka.Kuphatikiza apo, kuyezetsa kuthamanga kwa mpweya kunachitika pamalumikizidwe amagulu kuti atsimikizire kulimba kwa weld.
Mbali ina imene kontrakitala ndi mlangizi anayenera kusamala kwambiri ndi njira yomangira yomwe imagwiritsidwa ntchito ndi mapiri okhotakhota.Bajeti inali yoletsedwa, zomwe zikutanthauza kulamulira mwamphamvu kwa zipangizo.Gululo linapeza kuti kupanga malo otsetsereka ndi mapanelo ofanana ndi otsetsereka amatha kupulumutsa pazinthu, monga mipukutu ina yomwe idadulidwa ingagwiritsidwe ntchito pamapindikira atapatsidwa mapepalawo adadulidwa m'lifupi mwake ndikuwonongeka kochepa pa kudula.Choyipa cha njira iyi chinali chakuti pamafunika kuwotcherera kwambiri kumunda wa zida, koma ma welds onsewa adayang'aniridwa ndikutsimikiziridwa ndi gulu la zomangamanga ndi CQA kuti zitsimikizire kuti weld wabwino.
Kukula kwa malo otayirako ku Hong Hua Ling kudzapereka mphamvu zokwanira matani 2,080,000 osungira zinyalala.
Nkhani kuchokera: https://www.geosynthetica.net/landfill-expansion-shenzhen-hdpe-geomembrane/
Nthawi yotumiza: Sep-28-2022