【正文】 ..................................................................... 1 工程背景 ................................................................................................................... 4 鋼圍堰施工工藝簡介 ............................................................................................... 5 雙壁鋼圍堰受力分析 ............................................................................................... 8 第 2 章 圍堰結(jié)構(gòu)設(shè)計 —— 結(jié)構(gòu)力學(xué)方法 ....................................................................... 9 圍堰構(gòu)造 ................................................................................................................... 9 設(shè)計荷載 ................................................................................................................. 10 荷載種類 .......................................................................................................... 10 流水壓力 .................................................................................................... 10 靜水壓力 .................................................................................................... 10 波浪力 ........................................................................................................ 11 土壓力 ........................................................................................................ 11 計算工況 .......................................................................................................... 12 結(jié)構(gòu)設(shè)計 ................................................................................................................. 12 荷載組合 .......................................................................................................... 12 圍堰總體尺寸擬定 .......................................................................................... 12 工況 1 設(shè)計 ...................................................................................................... 13 隔艙板尺寸 ................................................................................................ 13 土壓力計算 ................................................................................................ 14 每個隔艙板的抗彎能力計算 .................................................................... 15 豎向隔艙鋼板工字型組合梁加勁肋布置 ................................................ 15 工況 2 設(shè)計 ...................................................................................................... 15 荷載計算 .................................................................................................... 15 隔艙板受力檢算 ........................................................................................ 16 內(nèi)支撐受力檢算 ........................................................................................ 17 水平環(huán)板受力檢算 .................................................................................... 18 水平桁架的斜桿受力計算 ........................................................................ 20 加勁肋受力驗算 ........................................................................................ 21 面板折算應(yīng)力驗算 .................................................................................... 22 檢算懸臂根部應(yīng)力 .................................................................................... 22 檢算承臺澆筑完成后可否拆除內(nèi)支撐 .................................................... 24 圍堰整體抗浮驗算 ................................................................................................. 25 圍堰下沉系數(shù)計算 .......................................................................................... 25 計 算圍堰自重 ............................................................................................ 25 計算鋼圍堰所受浮力 ................................................................................ 26 計算圍堰與土體摩阻力 ............................................................................ 27 豎向抗浮力計算 .............................................................................................. 27 鋼圍堰自重 ................................................................................................ 27 豎向抗浮力計算 ........................................................................................ 27 封底混凝土強度驗算 ...................................................................................... 27 封底混凝土彎曲應(yīng)力驗算 ........................................................................ 27 封底混凝土抗浮力驗算 ............................................................................ 28 第 3 章 圍堰施工工藝 ..................................................................................................... 29 圍堰加工工藝 ......................................................................................................... 29 雙壁鋼圍堰的錨碇系統(tǒng)布置 ................................................................................. 30 錨型選擇 .......................................................................................................... 30 錨重計算 .......................................................................................................... 31 錨錠系統(tǒng)布置簡介 .......................................................................................... 31 圍堰接高 ................................................................................................................. 34 圍堰下沉工藝 ......................................................................................................... 34 封底混凝土施工 ..................................................................................................... 35 圍堰的封底厚度分析 ...................................................................................... 35 封底混凝土施工工藝 ...................................................................................... 36 圍堰封底 .................................................................................................... 36 封底后抽水 ..............................................................................