【正文】 .....22 天然建筑材料 .........................................................................................................................................22 砂礫料 ...............................................................................................................................22 條石料 ...............................................................................................................................233 工程任務(wù)和規(guī)模 ............................................................................................................................................24 工程建設(shè)依據(jù) .........................................................................................................................................24 工程建設(shè)的必要性 .................................................................................................................................24 地區(qū)社會(huì)經(jīng)濟(jì)概況 ...........................................................................................................24 保護(hù)區(qū)社會(huì)經(jīng)濟(jì)概況 .......................................................................................................25 洪災(zāi)情況 ...........................................................................................................................25 防洪現(xiàn)狀 ...........................................................................................................................25 工程建設(shè)的必要性 ...........................................................................................................25 防洪任務(wù)和標(biāo)準(zhǔn) .....................................................................................................................................27 工程任務(wù) ...........................................................................................................................27 防洪標(biāo)準(zhǔn) ...........................................................................................................................27 渠線布置 ...........................................................................................................................284 工程設(shè)計(jì) ........................................................................................................................................................29 設(shè)計(jì)依據(jù) .................................................................................................................................................29 工程總布置 .............................................................................................................................................29 工程布置概況 ...................................................................................................................29 光明社區(qū)防洪渠 ...............................................................................................................30 4 三清社區(qū)防洪渠 ...............................................................................................................30 渠系建筑物 .......................................................................................................................30 工程設(shè)計(jì) .................................................................................................................................................30 防洪渠設(shè)計(jì) .......................................................................................................................31 擋土墻設(shè)計(jì) .......................................................................................................................32 整治涵管設(shè)計(jì) ...................................................................................................................32 消力池設(shè)計(jì) .......................................................................................................................32 人行橋設(shè)計(jì) .......................................................................................................................325 水土保持設(shè)計(jì)和環(huán)境保護(hù)設(shè)計(jì) ..................................................................................................................34 水土保持設(shè)計(jì) .........................................................................................................................................34 設(shè)計(jì)依據(jù) ...........................................................................................................................34 水土流失特點(diǎn)及預(yù)測(cè) .......................................................................................................34 水土保持措施 ...................................................................................................................35 水土保持投資估算及效益分析 .......................................................................................36 環(huán)境保護(hù)設(shè)計(jì) .........................................................................................................................................37 設(shè)計(jì)依據(jù) ...........................................................................................................................37 環(huán)境保護(hù)措施 ...................................................................................................................386 施工組織設(shè)計(jì) ................................................................................................................................................40 施工條件 ..................................................................................................................................................40 交通條件 ...........................................................................................................................40 建筑材料供應(yīng)條件 ...........................................................................................................40 施工用水及供電條件 .......................................................................................................40 其他條件 ...........................................................................................................................41 施工總體布置 ..........................................................................................................................................41 總布置原則 ..............