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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··········································3

1、深基坑概况·············································3b5E2RGbCAP 2、地质情况···············································4p1EanqFDPw 3、平面位置···············································4DXDiTa9E3d 1 / 14

二、编制依据··········································4 三、施工计划··········································5

1、施工时间安排···········································5RTCrpUDGiT 2、资源投入情况···········································55PCzVD7HxA 四、工艺方法··········································5

1、总体设想···············································5jLBHrnAILg 2、施工流程···············································6xHAQX74J0X 3、围堰施工···············································6LDAYtRyKfE 4、河边桥台开挖支护方法···································6 5、陆地基坑开挖支护方法···································7 6、钢板桩施工·············································7Zzz6ZB2Ltk 7、土方开挖···············································8dvzfvkwMI1 8、基坑排水···············································9rqyn14ZNXI 9、砼结构物施工···········································9EmxvxOtOco 10、钢板桩拔除············································9SixE2yXPq5 五、设计计算··········································9

1、陆地基坑围护计算·······································156ewMyirQFL 2、河边基坑围护计算······································18

六、安保措施··········································9

1、组织体系建设···········································9kavU42VRUs 2、沉降监测控制··········································10y6v3ALoS89 3、安全文明措施··········································10M2ub6vSTnP 2 / 14

七、其它事项·········································11

1、其它辅助方法··········································110YujCfmUCw 2、沉木河桥0#台第四幅基坑································11 3、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。eUts8ZQVRd 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；sQsAEJkW5T 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；GMsIasNXkA 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 中横河桥 结构物平面尺寸 5.8×32.5 5.8×32.5 5.8×25(7.35) 5.8×25(7.35) 5.8×12.35 5.8×13.70 5.8×12.70 5.8×12.35 5.8×12.35 5.8×13.70 5.8×12.70 开挖深度 4.8m 4.8m 4.9m 4.4m 4.9m 4.9m 4.6m 4.6m 4.8m 4.8m 4.9m 数量 1 1 1 1 1 1 1 1 1 1 1 墩位 0#台北侧（第一幅） 0#台北侧（第二幅） 0#台南侧（第三幅） 0#台南侧（第四幅） 3#台北侧（第一幅） 3#台北侧（第二幅） 3#台南侧（第三幅） 沉木河桥 3 / 14