Ukhula kunye nezihlahla zeyona ndawo iphambili ngaphakathi komda wokhetho lwe-TUNP. Ngexesha lovavanyo lwentsimi, zezinto ezichaphazela uzinzo ngokubanzi ze-tunnel akufuneki zivele kwaye zenzeke. Ukukhethwa kweetoti zentsimbi zentsimbi kubaluleke kakhulu, kwaye kukho imigaqo ethile ekufuneka ihlawulwe kwimisebenzi yokwakha ye-welding.
Kukho amanqaku aliqela ukuba anikele ingqalelo xa i-tunnel tun yensimbi ixhasa:
1. Kwimeko yomoya evulekileyo, inkxaso yentsimbi ye-Weldied inokwakha i-Shed. Lumka ungafumani mvula nekhephu kwi-shld.
2. Kubusika obubandayo, ukuba ipleyiti yentsimbi ingaphezulu kwe-9mm, inokubekwa kwi-welday kwizinto ezininzi. Oku kukuthintela ubushushu ukuba bangaphantsi kakhulu, kodwa ngokubanzi, i-welding kufuneka igqitywe ngexesha elinye kwaye ngokuqhubekayo. Xa i-welding, iziphene ezishiywe yi-welding kufuneka zicinywe kuqala, kwaye i-welding inokuqhubeka emva kokuba kungekho ngxaki.
I-3. Kwimeko yobushushu ephantsi, i-electros kunye neengcingo ezisetyenziselwa i-weldrogen ye-whdrogen kufuneka ibe ye-elektroni ye-whydrogen enamandla aphantsi kunye nobunzima obulungileyo phantsi kweemeko ezisemgangathweni.
4. Iintonga ze-welding ezisetyenziselwa i-welding ngaphantsi kwe-zeroding ezantsi, ezifuna ukubekwa kwibhokisi yokubhaka ene-80 ukuya kwi-100 degrees Celsius, kwaye isetyenziswe xa kufuneka. Ukuba i-electrode ibekwe ngaphantsi kwe-zero ngaphezulu kweeyure ezimbini, kufuneka iphinde ibhakwe, kodwa inani lamaxesha kufuneka lingaphantsi kathathu.
IXESHA LOKUQALA: APR-01-2022