温州市瓯海大道西段快速路工程Ⅲ标深基坑专项施工方案编制：审核：浙江奔腾建设工程有限公司温州市瓯海大道西段快速路工程Ⅲ标项目部2010年5月7日目录一、工程概况··········································31、深基坑概况·············································32、地质情况···············································43、平面位置···············································4二、编制依据··········································4三、施工计划··········································51、施工时间安排···········································52、资源投入情况···········································5四、工艺方法··········································51、总体设想···············································52、施工流程···············································63、围堰施工···············································64、河边桥台开挖支护方法···································65、陆地基坑开挖支护方法···································76、钢板桩施工·············································77、土方开挖···············································88、基坑排水···············································99、砼结构物施工···········································910、钢板桩拔除············································9五、设计计算··········································91、陆地基坑围护计算·······································152、河边基坑围护计算······································18六、安保措施··········································91、组织体系建设···········································92、沉降监测控制··········································103、安全文明措施··········································10七、其它事项·········································111、其它辅助方法··········································112、沉木河桥0#台第四幅基坑································113、加强与水务部门、地方政府的联系沟通····················12一、工程概况1、深基坑概况瓯海大道西段快速路工程Ш标段全长1061m（k4+124~k5+185）,主要为高架桥梁、地面桥和地面道路等，涉及深基坑的承台和桥台位于半塘河、沉木河、中横河等三座桥梁处。沉木河桥桥台基底标高-1.30m，老河道标高为+1.5m，台后标高为+3.6m。基坑开挖深度4.9m；中横河桥桥台基底标高-1.30m，老河道标高为+1.4m，台后标高为+3.4m。基坑开挖深度4.7m；半塘河桥台基底标高-1.30m，位于旱地，台后标高为+5.2m。基坑开挖深度6.5m；具体位置和开挖深度如下：部位结构物平面尺寸开挖深度数量墩位中横河桥5.8×32.54.8m15.8×32.54.8m15.8×25(7.35)4.9m15.8×25