【正文】 ................................................ 5 二、施工部署 ......................................................................................... 6 施工現(xiàn)場(chǎng)總體布置 ........................................................................................... 6 現(xiàn)場(chǎng)組織機(jī)構(gòu) ................................................................................................... 7 總體方案及施工流程 ....................................................................................... 7 三、施工降水 ......................................................................................... 9 沉井降水計(jì)算 ................................................................................................... 9 降水的布置及施工 ......................................................................................... 10 降排水備用設(shè)備與備用電源 ......................................................................... 12 降排水監(jiān)測(cè)系統(tǒng)布置 ..................................................................................... 12 四、主要施工方案 ............................................................................... 14 （一） 施工測(cè)量 ................................................................................................. 14 （二）、沉井基坑 ................................................................................................. 15 持力層的穩(wěn)定性計(jì)算 ................................................................................... 15 砂墊層，混凝土墊層及定位墊木布置 .......................................................... 17 （三）、沉井制作 ................................................................................................. 18 制作流程及分縫布置 ................................................................................... 18 預(yù)埋件 ........................................................................................................ 21 砼工程 ........................................................................................................ 21 （四）、沉井下沉 ................................................................................................. 22 下沉計(jì)算 .................................................................................................... 23 準(zhǔn)備下沉 .................................................................................................... 25 沉井挖土 .................................................................................................... 26 終沉計(jì)算及終沉措施 ................................................................................... 26 沉井封底 .................................................................................................... 27 五、 施工中特殊地基及意外情況的應(yīng)急預(yù)案 .................................... 30 溝浜、暗浜的處理方案 ................................................................................. 30 沉井下沉?xí)r發(fā)生突沉、超沉的應(yīng)對(duì)預(yù)案 ..................................................... 30 產(chǎn)生傾斜、偏移原因及糾正措施 ................................................................. 32 六、施工進(jìn)度計(jì)劃 ............................................................................... 33 七、 施工機(jī)械設(shè)備配置 ........................................................................ 34 2 八、工程質(zhì)量、安全生產(chǎn)及文明施工保證措施 ................................. 35 （一）、工程質(zhì)量保證措施 ................................................................................. 35 沉井施工質(zhì)量標(biāo)準(zhǔn) ...................................................................................... 35 質(zhì)量保證措施 ............................................................................................. 35 （二）、安全生產(chǎn)保證措施 ................................................................................. 36 現(xiàn)場(chǎng)安全措施 ............................................................................................. 36 用電及機(jī)械設(shè)備 .......................................................................................... 36 操作中的安全措施及要求 ............................................................................ 37 （三）、文明施工及其它 ................................................................................... 37 九、污水泵房降水及穩(wěn)定計(jì)算 ............................................................ 38 降水計(jì)算 ......................................................................................................... 38 沉井基坑承載計(jì)算 ......................................................................................... 39 污水沉井下沉計(jì)算 ......................................................................................... 40 終沉穩(wěn)定計(jì)算 .....................................................................