He mea hanga te geogrid muka karāhe mai i ngā miro muka karāhe kua whatuhia, kua pania hoki.

1. Tirohanga whānui o te mata whenua muka karāhe

He rauemi geosynthetic tino pai te muka karāhe e whakamahia ana mō te whakapakari i te papa rori, te whakapakari i ngā rori tawhito, te papa whenua me te turanga oneone ngohengohe. He hua pakari-haurua tēnei i hangaia mai i te muka karāhe kaha-kore-waikawa mā te hangarau whatu miro matatau o te ao hei hanga rauemi turanga mata, kātahi ka pania te mata. He mea hanga mai i ngā miro muka karāhe mā te whatu me te paninga.

2. Ngā āhuatanga o te matawhenua muka karāhe

（1) Ngā āhuatanga miihini

• He kaha kume teitei, he iti te roa: Ki te mea he rauemi mata te muka karāhe, he nui te ātete ki te whakarerekētanga, ā, he iti iho i te 3% te roa i te wā whati, e kore ai e ngāwari te roa me te whakarerekē i te wā e mau ana i ngā kaha o waho.
• Kāore e ngokingoki roa: Hei rauemi whakapakari, ka taea e ia te ātete i te whakarerekētanga i raro i te kawenga roa, ā, kāore te muka karāhe e ngokingoki, ka taea ai te whakarite i te mahi roa o te hua.
• Teitei o te ngāwari: He teitei tōna ngāwari, ā, ka taea te ātete i te whakarerekētanga ina pēhia, pērā i te pikau i ētahi taumahatanga i roto i ngā hanganga papa me te pupuri i te pumau o te hanganga.

（2) Te urutau ki te pāmahana

He pai te pumau o te wera: ko te pāmahana rewa o te muka karāhe he 1000 ℃. Mā tēnei ka pumau te mata whenua muka karāhe kia tu atu ki te wera i ngā taiao pāmahana teitei pērā i te whakatakoto papa, ā, ka taea hoki te whakamahi i ngā wāhi makariri rawa, e whakaatu ana i te ātete pai ki te pāmahana teitei me te pāmahana iti.

（3) Te whanaungatanga ki ētahi atu rauemi

• Te hototahitanga ki te ranunga uku: Ko te rauemi i whakamahia i roto i te tukanga whai muri i te maimoatanga he mea hanga mō te ranunga uku, kua pania katoatia ia muka, ā, he tino hototahi ki te uku, kāore e wehea mai i te ranunga uku i roto i te paparanga uku, engari he piripono te hononga.
• Te honohono me te here o te kirikiri: Nā tōna hanganga mata ka taea e te kirikiri i roto i te raima uku te uru atu mā roto, ka hanga he honohono ā-ringa. Mā tēnei momo honohono ka whakawhāitihia te nekehanga o te kirikiri, ka taea e te ranunga kirikiri te whakatutuki i tētahi āhua whakakī pai ake ina utaina, ka whakapai ake i te kaha kawe kawenga, te mahi whakawhiti kawenga, ā, ka whakaiti i te whakarerekētanga.

（4) Te pakari

• Te pumau ā-tinana me te matū: Whai muri i te paninga ki tētahi kaihoko motuhake i muri i te maimoatanga, ka taea e ia te ātete i ngā momo kakahu ā-tinana me te horo matū katoa, tae atu ki te horo koiora me te huringa āhuarangi, kia kore ai e pāngia tōna mahi.
• He ātete pai ki te kawakore me te ātete koroheketanga: I muri i te maimoatanga o te paninga mata, he pai te pakari i roto i ngā taiao rerekē, ā, ka taea te whai hua mō te wā roa.