I-Shenzhen ingelinye lamadolobha amaningi ase-China asendleleni yokuthuthukisa esheshayo. Hhayi ngokungalindelekile, ukukhula okusheshayo kwezimboni nezindawo zokuhlala kwedolobha sekudale izinselelo eziningi zekhwalithi yezemvelo. I-Hong Hua Ling Landfill iyingxenye eyingqayizivele yentuthuko ye-Shenzhen, ngoba indawo yokulahla imfucumfucu ayibonisi nje kuphela izinselelo zemikhuba yangaphambilini yokulahlwa kwemfucuza yedolobha kodwa indlela ikusasa layo elivikelwa ngayo.
I-Hong Hua Ling isebenze iminyaka, yamukela izinhlobo eziningi zokulahlwa kwemfucuza, okuhlanganisa nezinhlobo zemfucuza ezibhekwa njengezizwela kakhulu (isb, imfucuza yezokwelapha). Ukuze kulungiswe le ndlela yakudala, kwadingeka ukwanda kwesimanje.
Idizayini eyalandela yokunwetshwa kwezindawo zokulahla udoti eyi-140,000m2 yenze isiza sikwazi ukuphatha cishe ingxenye yengqikithi yokulahlwa kukadoti endaweni yase-Shenzhen's Longgang, okuhlanganisa nokwamukela amathani ayi-1,600 emfucuza nsuku zonke.
UKWENZIWA KWENDAWO YOKULAHLA E-SHENZHEN
Isistimu yendawo enwetshiwe yaqale yaklanywa ngesisekelo esinemigqa emibili, kodwa ukuhlaziya umhlaba kwathola ukuthi ungqimba olukhona lobumba oluyi-2.3m – 5.9m olukwazi ukungena kancane lungasebenza njengesithiyo sesibili. Ulayini oyinhloko, nokho, wawudinga ukuba isixazululo se-geosynthetic sekhwalithi ephezulu.
I-HDPE geomembrane yashiwo, nama-geomembrane awugqinsi angu-1.5mm no-2.0mm akhethiwe ukuze asetshenziswe ezindaweni ezihlukahlukene. Onjiniyela bephrojekthi basebenzise imihlahlandlela eminingi ekwenzeni izinqumo zabo zesici nokuqina, okuhlanganisa i-CJ/T-234 Guideline on High Density Polyethylene (HDPE) Yezindawo Zokulahla Impahla kanye Nezinga le-GB16889-2008 Lokulawula Ukungcola Endaweni Yokulahla Imfucumfucu Yemfucuza Eqinile Kamasipala.
I-HDPE geomembranes isetshenziswe kuyo yonke indawo yokunwetshwa kwezindawo zokulahla imfucumfucu.
Phansi, ulayini obushelelezi wakhethwa kuyilapho indawo egqamile, ehlelekile ye-geomembrane ikhethwa ezindaweni ezitshekile ngaphezu kwe-geomembrane ehlanganisiwe noma efuthwe phezu kwendawo eyakhiwe.
Izinzuzo zokusebenza kokungqubuzana kwe-interface ia ngenxa yesakhiwo kanye nokufana kwe-membrane surface. Ukusetshenziswa kwale geomembrane ye-HDPE kuphinde kwahlinzeka ngezinzuzo zokusebenza nezokwakha ithimba lonjiniyela bokuklama elizifunayo: ukumelana nokucindezeleka okuphezulu, i-Melt Flow Rate ephezulu ukuze unike amandla ukusebenza okuqinile kokushisela, ukumelana namakhemikhali okuhle kakhulu, njll.
Inetha yokukhipha amanzi isetshenziswe njengesendlalelo sokuthola ukuvuza nanjengesendlalelo sokudonsa amanzi ngaphansi kwe-aggregate. Lezi zingqimba zokudonsa amanzi futhi zinomsebenzi ombaxambili wokuvikela i-HDPE geomembrane ekulimaleni okungaba khona kokubhoboza. Ukuvikelwa okwengeziwe kunikezwe isendlalelo se-geotextile esiqinile esiphakathi kwe-HDPE geomembrane kanye ne-subgrade yobumba obukhulu.
IZINSELELE EZINGAHLUKILE
Imisebenzi yokwakha endaweni yokulahla imfucumfucu yaseHong Hua Ling yenziwa ngesimiso esiqinile, ngenxa yengcindezi yokuthi indawo ekhula ngokushesha ibe nokunwetshwa okukhulu kwezindawo zokulahla imfucuza ngokushesha ngangokunokwenzeka.
Imisebenzi yokuqala yenziwa nge-50,000m2 ye-geomembrane kuqala, kwase kuthi u-250,000m2 osele we-geomembranes odingekayo wasetshenziswa kamuva.
Lokhu kudale iphuzu lokuqaphela lapho ukwakheka okuhlukile komkhiqizi we-HDPE kwakudingeka kuhlanganiswe ndawonye. Isivumelwano ku-Melt Flow Rate sasibucayi, futhi ukuhlaziya kwathola ukuthi ama-MFRs wezinto ezibonakalayo afana ngokwanele ukuvimbela amaphaneli ukuthi ahlukane. Ngaphezu kwalokho, ukuhlolwa komfutho womoya kwenziwa kumajoyinti ephaneli ukuze kuqinisekiswe ukuqina kwe-weld.
Enye indawo lapho usonkontileka nochwepheshe bekufanele banake kakhulu ibheka indlela yokwakha esetshenziswa nemithambeka egobile. Isabelomali besinomkhawulo, okusho ukulawulwa okuqinile kwezinto. Ithimba lithole ukuthi ukwakha umthambeko ngamaphaneli ahambisana nomthambeka kungasindisa ezintweni, njengoba amanye ama-rolls asikiwe angasetshenziswa ejikeni uma kunikezwe amaphaneli asikwa abe nobubanzi obufushane ngaphandle kokumosheka okuncane ekusikeni. Ububi bale ndlela kwakuwukuthi yayidinga ukushiselwa okukhulu kwempahla, kodwa lawa mashisela wonke ayeqashwe futhi aqinisekiswa ithimba lezokwakha kanye ne-CQA ukuze kuqinisekiswe izinga lokushisela.
Ukunwetshwa kweLandfill yaseHong Hua Ling kuzonikeza umthamo ophelele wamathani ayi-2,080,000 okugcina imfucuza.
Izindaba ezivela: https://www.geosynthetica.net/landfill-expansion-shenzhen-hdpe-geomembrane/
Isikhathi sokuthumela: Sep-28-2022