Ko ngā whāinga matua o te whakapai ake i te mahi rū whenua o ngā paipa tuku wai e rua: ko te tuatahi kia whakarite i te kaha tuku wai, kia ārai i te ngaronga o te pēhanga wai i te wāhi nui, kia taea ai te tuku wai ki ngā whare ahi me ngā whare nui i roto i te āhuatanga ohorere; ko te tuarua kia whakaitihia te kino o te paipa kia tere ai te whakatika. Arā, ina pāngia e ngā āhuatanga rū whenua, me nui ake te urutau o te pūnaha tuku wai.
He mea nui te ārai i ngā pakaru o te puna wai matua kia mau tonu ai te mahi noa o te pūnaha tuku wai. Ko te pūnaha paipa PE4710 (he rite ki te PE100) te mea iti rawa te tūponotanga o te pakaru me te turuturu o tētahi paipa wai, ā, e āwhina ana ki te whakatutuki i ngā whāinga katoa o runga ake nei.
Ko te horapa o te ngaru me te whakarerekētanga tūturu o te whenua ngā tino take o te kino o ngā paipa huna. Nā te kaha o te tuaka me te ahotea piko, ka hua ake ngā taumahatanga tuaka me te piko i roto i te paipa i te nekehanga whenua. Ko ngā rauemi he pakari teitei (he ahotea whakaaetia teitei) he iti noa te kaha ki te whakarerekē. Ko ngā rauemi ngawari e tohuhia ana e te polyethylene (PE) (he ahotea whakaaetia iti) he pai te kaha ki te whakarerekē me te pakari.
Ko te kaha o te pūnaha paipa ki te ru whenua e whakaatahia ana e tōna ngāwari ki te urutau ki te taumahatanga o te mata. Ka taea e te ru whenua, te horapa rānei o ngā ngaru ru whenua te whakararu i te whenua kia kino ai ngā paipa tino ngoikore. Ko te ngatata o ngā hapa, te horo whenua, te hurihanga o te oneone hei paru me te hua o te taunga me/te horapa taha rānei, te totohu o te whenua me te hiki i te whenua, ka nui ake te taumahatanga o te whenua, ka hua ake he kino ki ngā wāhi nui o ngā paipa kua tanumia. Kei te Ripanga B-1 ngā raraunga taumahatanga whenua i kitea puta noa i te ao nā te rerekētanga tūturu o te whenua.
Ripanga B-1 Te taumahatanga whenua i kitea nā te rerekētanga tūturu o te whenua
Ko te whānuitanga o te taumahatanga whenua e hiahiatia ana mō ngā paipa kei waenganui i te 0.05% me te 4.5%. I roto i tētahi pūrongo i te tau 2008 a te American Electric Power Research Institute, i hoatu ngā inenga kaha taumahatanga o te rauemi PE4710. I te pāmahana 50°F (10°C), ko te taumahatanga hua kume toharite o te paipa PE4710 he 9.9%, ko te taumahatanga kume mutunga toharite he 206%. Ka neke te paipa polyethylene hei urupare ki te nekehanga whenua, kaua ki te ātete ki ngā kawenga ka pakaru pea ngā paipa pakari, pakarukaru rānei. I te nuinga o ngā huihuinga rū whenua, ka piko te paipa polyethylene kiato teitei (HDPE) kua whakarewaina (kua whakarewaina), engari e kore e whati, e wehe rānei (hononga kore-hiri), kia mau tonu ai te puna wai noa. Me mōhio ko ngā hononga katoa o ngā paipa PE me ētahi atu hanganga, ngā whakaurunga tāpiri me ngā wāhanga ka pāngia pea e ngā kawenga rerekē teitei ake. Me whakamahere me te hoahoa te hononga o ēnei wāhanga kia whakaitihia te tūponotanga o te pakaru.
Ko te taumahatanga hua kume o te paipa PE4710 e tata ana ki te rua o te taumahatanga whenua i puta mai i te rahinga mōrahi i kitea, ā, ko te taumahatanga mutunga o PE4710 e neke atu ana i te 40 ngā wā i te taumahatanga whenua tihi. Ko te mahi i whiwhihia mā te tatau ariā he rite ki te whakamahinga o te paipa polyethylene i roto i te rū whenua. I pai te mahi a te raina tuku wai HDPE i whakarewaina i roto i te rū whenua. E whakaatu ana te Ripanga B-2 i ngā kitenga wāhanga o ngā rū whenua o mua i Hapani (Omuro and Himono, 2018).
Ripanga B-2 Ngā raraunga i kitea i ngā wā o ngā rū whenua o mua i Hapani
Me aromatawai te mahi ru o ngā paipa, tae atu ki te pakari, te kaha totoro axial, te radius piko e whakaaetia ana, te kaha hononga, te pumau me te āhua o ngā paipa o nāianei. He maha ngā wheako ru e whakaatu ana ka taea e ngā paipa matua tuku wai HDPE, e ai ki ngā paerewa raupapa paipa ASTM, te pupuri i te mahi noa i raro i te nuinga o ngā āhuatanga kawenga ru. Mēnā he teitei ngā whakaritenga mahi ru o te paipa matua tuku wai, me whai whakaaro ki te whakamahinga o ngā paipa HDPE kua whakarewaina, nā te mea he pono ake te mahi ru o ngā paipa HDPE, ā, ka taea e rātou te urutau ki ngā momo taumahatanga o te whenua i puta mai i ngā rū whenua, me te pupuri i te mahi noa.
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Wā tuku: Maehe-06-2025
