【正文】 ..........5 水文 ...................................................................................................................7 泥沙 .................................................................................................................10 河勢分析及防洪影響評價(jià) .............................................................................11 內(nèi)河水位 .........................................................................................................20 地震烈度 .........................................................................................................20 水系概況 .........................................................................................................20第三章 工程地質(zhì) .....................................................................................................21 工程區(qū)地形地貌 .............................................................................................21 場地地基土層 .................................................................................................21 水文地質(zhì)條件 .................................................................................................22 地基土的液化判別 .........................................................................................22 地基土評價(jià) .....................................................................................................23第四章 工程任務(wù)和規(guī)模 .........................................................................................25XXX 長青沙閘遷建工程可行性研究報(bào)告南通和信工程勘測設(shè)計(jì)院有限公司 2 地區(qū)社會經(jīng)濟(jì)發(fā)展?fàn)顩r及工程建設(shè)的必要性 .............................................25 水文計(jì)算 .........................................................................................................27 工程規(guī)模 .........................................................................................................28 綜合利用 .........................................................................................................30第五章 工程布置及工程設(shè)計(jì) .................................................................................31 水閘及圍堤設(shè)計(jì)標(biāo)準(zhǔn) .....................................................................................31 工程的總體布置 .............................................................................................31 方案比選 .........................................................................................................35第六章 施工組織設(shè)計(jì) ...........................................................................................37 施工條件 .........................................................................................................37 施工工序 .........................................................................................................37 施工圍堰和排水 .............................................................................................38 主體工程 .........................................................................................................39 施工輔助企業(yè) .................................................................................................40 施工總布置 .....................................................................................................41 施工總進(jìn)度 .....................................................................................................41第七章 工程管理 .....................................................................................................43 管理機(jī)構(gòu) .........................................................................................................43 管理范圍 .........................................................................................................43 管理設(shè)施 .........................................................................................................43 運(yùn)行管理 .........................................................................................................43 工程觀測 .........................................................................................................44XXX 長青沙閘遷建工程可行性研究報(bào)告南通和信工程勘測設(shè)計(jì)院有限公司 3第八章 工程投資估算 .............................................................................................46 編制依據(jù) .........................................................................................................46 編制說明 .........................................................................................................46 概算總價(jià) .........................................................................................................46第九章 經(jīng)濟(jì)評價(jià) .....................................................................................................48 國民經(jīng)濟(jì)分析 .................................................................................................48 結(jié)論 .................................................................................................................50第十章 環(huán)境評價(jià) .....................................................................................................51 環(huán)境狀況 .......................................................................................................51 防洪工程對環(huán)境的改善 ...............................................................................51 防洪工程對環(huán)境的負(fù)面影響 .......................................................................53 施工期環(huán)境保護(hù) ...........................................................................................53 環(huán)評結(jié)論 .......................................................................................................54第十一章 工程招標(biāo) .................................................................................................55 招標(biāo)基本情況 ...............................................................................................55 招標(biāo)初步方案 ...............................................................................................56附件一、招標(biāo)基本情況表附件二、工程概算附件三、方案設(shè)計(jì)圖紙XXX 長青沙閘遷建工程可行性研究報(bào)告南通和信工程勘測設(shè)計(jì)院有限公司 1第 一 章 綜 合 說 明 工程概況長青沙位于 XXX 南端，系長江中沙洲。自 1964 年圍墾開發(fā)利用至今，已成為優(yōu)良糧種和綠色食品基地。長青沙原靠建在江堤上的六個(gè)鋼筋網(wǎng)水泥涵洞引排水，后因江堤加高培厚，鋼筋網(wǎng)水泥洞身不堪重負(fù)而斷裂。長青沙閘為長青沙島的農(nóng)田灌溉、抗旱排澇、防洪擋潮、水上運(yùn)輸做出巨大貢獻(xiàn)。新閘為單孔節(jié)制閘，閘孔凈寬 米，（廢黃河零點(diǎn)，下同）米，底板邊墩采用 U 型結(jié)構(gòu)，邊墩直接擋土。水閘上下