Aikin Sabuntawa na 200KV Substation a Tianjin

Samfurin mu NPT3700 ana amfani da shi wajen sashen kudu na bututun ƙarƙashin ƙasa 3 # zuwa 2 # a wannan aikin, tare da jimillar tsawon mita 952. An gina mita 496 na farko ta hanyar hanyar jacking bututu, yayin da mita 456 na ƙarshe aka gina ta hanyar hanyar ƙasa mai kariya. Yana wucewa ta cikin tubalin mastar ƙarfin wuta biyu, bututun sharar gida guda biyu, da ramin ƙaton jirgin ƙasa na Nan Cao wanda yake da banbancin tsayi na 3.41m.
Wannan aikin shi ne aikin tashi ƙarfin wutar lantarki na farko a Arewacin China da ya yi amfani da hanyar gina "Pipe jacking-Shield tunneling", kuma shi ne mafi tsawon tazarar tashi bututu guda ɗaya a Arewacin China.

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