1、一.工程概況..........................................................................................................................................21.工程名稱.....................................................................

2、.................................................................22.工程項(xiàng)目概述..............................................................................................................................23.工程水文地質(zhì)條件.........

3、.............................................................................................................24.工程場(chǎng)地周邊環(huán)境條件..................................................................................................

4、............3二.施工方案............................................................................................................................................31.采用大開(kāi)挖部分...................................................

5、.......................................................................31.1基坑開(kāi)挖...................................................................................................................................31.2基坑支護(hù)施工

6、順序...................................................................................................................41.3溝槽內(nèi)支護(hù)..............................................................................................

7、.................................41.3.1支護(hù)作業(yè)基本要求................................................................................................................41.3.2拆撐作業(yè)基本要求...............................................

8、.................................................................51.3.3基坑內(nèi)排水............................................................................................................................52.采用鋼板樁支護(hù)部分........

9、..........................................................................................................52.1溝槽基坑支護(hù)施工順序....................................................................................................

10、.......62.2施工準(zhǔn)備...................................................................................................................................62.3打支護(hù)樁..................................................................

11、.................................................................62.4打樁機(jī)械選擇...........................................................................................................................72.5打樁方式的選擇...........

12、............................................................................................................72.6打樁施工中常見(jiàn)問(wèn)題的分析及處理：...................................................................................72.7打樁深度、

13、開(kāi)挖寬度的確定...................................................................................................4三、基坑支護(hù)工程的現(xiàn)場(chǎng)監(jiān)測(cè)....................................................................................................

14、.........81基坑觀測(cè)的內(nèi)容..........................................................................................................................82基坑觀測(cè)點(diǎn)的布置......................................................................

15、................................................83監(jiān)測(cè)頻率......................................................................................................................................84鋼板樁的檢驗(yàn)與矯正.....................

16、.............................................................................................94.1鋼板樁檢驗(yàn)......................................................................................................................

17、.........94.2鋼板樁矯正.............................................................................................................................104.3鋼板樁允許偏差.................................................................

18、....................................................114.4鋼板樁的支撐.........................................................................................................................12四、基坑開(kāi)挖中出現(xiàn)的問(wèn)題及相應(yīng)的應(yīng)變措施..............

19、.................................................................131開(kāi)挖中可能出現(xiàn)的問(wèn)題............................................................................................................132安全、穩(wěn)定應(yīng)變措施......................

20、..........................................................................................143支撐.............................................................................................................................

21、.............14五、污水管道安裝...............................................................................................................................15六、溝槽回填..............................................................

22、.........................................................................15七、鋼板樁的拔除...............................................................................................................................161拔樁作業(yè)開(kāi)始時(shí)

23、的注意事項(xiàng)....................................................................................................162拔樁作業(yè)結(jié)束后的注意事項(xiàng)....................................................................................................

24、17八、機(jī)械設(shè)備及勞動(dòng)力配置...............................................................................................................171機(jī)械配置........................................................................................

25、............................................172勞動(dòng)力配置................................................................................................................................18九、施工進(jìn)度計(jì)劃..............................

26、.................................................................................................18十、安全措施...................................................................................................................

27、....................19松白路改造工程光明新區(qū)段Ⅱ標(biāo)深基坑專項(xiàng)施工方案深圳市路橋建設(shè)集團(tuán)公司3性。沿線無(wú)明顯大斷裂構(gòu)造與之相交，局部有小斷裂帶發(fā)育，成為地下水的良好通道，表現(xiàn)為涌水量大、分布集中且具承壓性。構(gòu)造裂隙水的復(fù)雜情況對(duì)橋梁工程影響較大。根據(jù)原施工圖設(shè)計(jì)現(xiàn)場(chǎng)鉆探揭露和室內(nèi)土工試驗(yàn)結(jié)果，路段內(nèi)分布的地層從上而下為：人工填土層(Qml)、埋藏植物層(Qpd)、第四系全新統(tǒng)沖洪積層(Q4alpl)、第四系全新統(tǒng)坡洪

28、積層(Q4dlpl)、第四系上更新統(tǒng)統(tǒng)沖洪積層(Q3alpl)、下伏基巖為三疊系砂質(zhì)泥巖(T)、加里東期混合花崗巖(Mγ3)。4.4.工程場(chǎng)地周邊環(huán)境條件工程場(chǎng)地周邊環(huán)境條件本工程位于深圳市寶安區(qū)光明街道，交通便利。各施工點(diǎn)均有道路可通車，沿路紅線內(nèi)建筑及構(gòu)筑物拆遷問(wèn)題也在進(jìn)行。二.施工方案施工方案1.1.采用大開(kāi)挖部分采用大開(kāi)挖部分原設(shè)計(jì)該路段均為輔道軟基換填段，換填深度為3.0m左右，故先挖除需換填的土方，然后整理場(chǎng)地。1.11.1