沉井頂管施工方案

1、沉井頂管專項方案目錄第一章工程概況............................................................................................................................41.1工程概況.......................................................................

2、....................................................41.2編制依據...........................................................................................................................5第二章地質條件.............................

3、...............................................................................................62.1工程地質性質...................................................................................................................

4、62.2地下水特征.......................................................................................................................6第三章工作井、接收井施工方案.............................................................................

5、...................73.1概述...................................................................................................................................73.2沉井施工流程......................................................

6、.............................................................73.3工程的特點和難點...........................................................................................................83.4沉井制作、接高、下沉分析........................

7、...................................................................93.4.1沉井制作時砂墊層和下臥層承載力驗算............................................................93.4.2沉井下沉穩定性驗算.......................................................

8、...................................103.4.3下沉系數分析......................................................................................................113.5沉井地基處理施工.........................................................

9、................................................143.5.1測量放線..............................................................................................................143.5.2基坑開挖........................................

10、......................................................................143.5.3鋪筑砂墊層、砼墊層..........................................................................................153.6沉井結構制作.................................

11、................................................................................153.6.1起重設備及腳手工程..........................................................................................153.6.2模板工程.......................

12、.......................................................................................163.6.3鋼筋工程..............................................................................................................183.6.4砼工程..

13、................................................................................................................193.6.5回填砂工程................................................................................................

14、..........193.7沉井下沉.........................................................................................................................193.7.1下沉施工.....................................................................

15、.........................................193.7.2沉井助沉措施......................................................................................................213.7.3下沉糾偏.....................................................

16、.........................................................223.8沉井封底、底板施工.....................................................................................................243.9騎馬式沉井施工方法..................................

17、...................................................................263.10鉆孔樁接收坑施工方案...............................................................................................283.10.1施工順序..............................

18、.................................................................................283.10.2鉆孔灌注樁施工...................................................................................................293.11旋噴樁施工..............

19、.....................................................................................................37第四章頂管施工方案............................................................................................................

20、......434.1施工準備.........................................................................................................................434.2施工現場組織.........................................................................

21、........................................434.2.1管線保護與地面監測措施.....................................................................................434.2.2周圍建筑物的保護..............................................................

22、...................................444.2.3施工組織準備.........................................................................................................444.3施工方法..........................................................

23、...............................................................454.3.1施工工藝流程.........................................................................................................45沉井頂管專項方案37.1施工總進度....................

24、.................................................................................................887.2保證工期措施................................................................................................................

25、.88第八章施工機械設備配置及布置..............................................................................................908.1投入施工的機械設備...............................................................................................

26、......908.2主要施工機械設備的布置.............................................................................................91第九章季節性施工措施.............................................................................................

27、.................929.1夏季施工措施.................................................................................................................929.2雨季施工措施....................................................................

28、.............................................92主要施工機械設備表..............................................................................................................93測量儀器設備表.............................................

29、.........................................................................94主要勞動力計劃表..................................................................................................................95工程施工進度橫道圖............

30、..................................................................................................95施工平面布置圖.................................................................................................................