Drum Cutter Yakashandiswa Kuchera Tunnels

Kuvakwa kwetunnel nguva dzose kwave kuri musimboti wezvirongwa zvokuvaka, uye kuvaka kwakaoma. Makore ekuma1960 asati asvika, musanganiswa wekuchera nekuputika wakashandiswa kugadzira tunzira. Izvo zvisingabatsiri zveiyi nzira zvinonyatsojeka, kuchengetedzwa kwekuputika hakuzivikanwi, huwandu hwakawanda hwekusvibiswa hunogadzirwa, uye chimiro chemugero wakaputika hachina kukwana, izvo zvisingagoni kunyatsodzorwa. Mushure memakore ekuma1960, mwero wekuvakwa kwetunnel mechanization wakavandudzwa zvikuru, uye kushandiswa kwedhiramu rekucheka kwakashandura zvachose nzira yekuchera nekuputika yekuchera tunnel.

Izvo zvakajairika kune dhiramu rinocheka rinoshandiswa kuchera tunnels. Iyo dhiramu yekucheka ine chaiyo kuvakwa uye inofambiswa ne hydraulic tekinoroji. Mazino ekucheka ari padhiramu rekucheka anodhumhana nepamusoro pekuvaka uye kucheka ivhu nematombo semhara dzakapinza, zvichipa nzira itsva uye ine hupfumi yekuvaka yekuchera tunnel. Kana mukati memugero wakaita sandstone, sedimentary rock, uye siltstone, kukurumidza kuchera kwezuva nezuva kwedhiramu cutter kunosvika 10 metres, uye kushanda kwekugaya kwakakwira zvakanyanya. Nerubatsiro rweYichen drum cutter, chirongwa chekuvaka tunnel chakapedzwa mumazuva makumi mana, izvo zvakapfupisa zvakanyanya nguva yekuvaka.