【正文】 ............................................... 18 .......................................................................................................................................... 18 .............................................................................................................................. 18 ................................................................................................................................................... 19 第二章 路線方案比選 .................................................................................................................................... 20 第三章 二次襯砌內(nèi)力計算 ..................................................................................................... 21 ..................................................................................................................................................... 21 ..................................................................................................................................................... 21 ............................................................................................................................................. 22 .................................................................................................................................... 22 S及分段軸長△ S ..................................................................................................... 22 (截面 )中心幾何要素 ................................................................................................... 23 ..................................................................................................................................................... 24 ............................................................................................................................................. 24 — 主動荷載在基本結(jié)構(gòu)中引起的位移 .............................................................................. 26 ................................................................................................................................................. 29 ............................................................................................................................................. 32 ................................................................................................................................................. 32 .................................................................................. 33 ........................................................................................................................................ 34 畢業(yè)設(shè)計（論文）報告紙 共 83 頁 第 10 頁 .................................................................................................................................... 36 ....................................................................................................................................................... 36 第四章 通風(fēng)計算 .............................................................................................................................................. 38 ........................................................................................................................................ 38 CO排放量 ............................................................................................................................................. 38 CO 的需風(fēng)量 .................................................................................................................................. 40 ............................................................................................................................................. 41 ................................................................................................................................ 42 .................................................................................................................... 42 ..............................