???????????????????????????,??????,????????.???????????100m???????3.6m??3.4m,?????????????????????????????????????????????????????????????????????????????????????????????
????????dn3400mm,???3400mm,?9t,??2?10t????????????????????,??????????4.5t????????1.1,??????1.2,?????????4.5x1.1x1.2=5.94t,??????????
??????????????????
(1)??????????????9t,????88200n,???????,???????????,???1??,???b????,????2?,???????60°?
??????????????
??:s?????????,n;g?????,n;n???????;c?????,?1.2;h;?????,?1.1;k2??????,?1.2?
???????????????
??:d1???????mm;???????1770n/mm2??
???????????????????????32mm??????1770n/mm2?????????????3?0t????????????????16mm?
(2)?????(3)???1?????????p?69854?4n????????????
??:d2????????mm;p?????????n?
?????????????????????????????45mm??????????3.0t????????????????20mm? |
