【正文】 .................................. 4 系數(shù)選取 .................................................................................................................................................. 4 基坑支護(hù)計(jì)算分析 .................................................................................................................................. 5 （三）基坑支護(hù)順序的確定 ............................................................................................................................. 5 （四）自然放坡挖取第一 層土的邊坡支坡 .................................................................................................... 5 （五）水泥深層攪拌樁的施工流程與技術(shù)要點(diǎn) ............................................................................................ 5 施工工藝流程 .......................................................................................................................................... 5 施工技術(shù)要點(diǎn) .......................................................................................................................................... 6 （ 六）鉆（沖）孔灌注樁的施工流程與技術(shù)要點(diǎn) ....................................................................................... 6 鉆孔灌注樁的施工流程 ......................................................................................................................... 6 施工技術(shù)要點(diǎn) .......................................................................................................................................... 8 常見事故處理及預(yù)防措施 ................................................................................................................... 12 四、基坑工程施工 .................................................................................................................................................. 16 （一）基坑降、排水 ........................................................................................................................................ 16 （二）挖土要求 ................................................................................................................................................ 17 五、施工監(jiān)測(cè)設(shè)計(jì)方案 ......................................................................................................................................... 18 （一）水平位移監(jiān)測(cè) ........................................................................................................................................ 19 （二）沉降位移監(jiān)測(cè) ........................................................................................................................................ 19 （三）周邊及基坑內(nèi)土體情況監(jiān)測(cè) ............................................................................................................... 19 （四）監(jiān)測(cè)工作質(zhì)量的保證措施 ................................................................................................................... 19 （五）觀測(cè)要求 ................................................................................................................................................ 20 六、施工應(yīng)急預(yù)案 .................................................................................................................................................. 21 （一）支護(hù)結(jié)構(gòu)位移 ........................................................................................................................................ 21 （二）流砂、管涌 ............................................................................................................................................ 21 （三）支護(hù)結(jié)構(gòu)滲水 ........................................................................................................................................ 22 2 （四）支護(hù)結(jié)構(gòu)漏水 ........................................................................................................................................ 22 （五）截、排水措施 .....