15标围护方案.docx

15标围护方案.docx

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15标围护方案

竹园第一、第二污水处理厂提标改造（升级补量）工程ZY1.5标（出水及污泥处理构筑物等）围护施工方案

第一章综合说明..............................................................................................................................1

1、编制说明..............................................................................................................................1

1.1编制主要依据.................................................................................................................1

1.2其他参考文件.................................................................................................................1

2、工程概况..............................................................................................................................2

2.1工程概述.........................................................................................................................2

2.2主要工程内容.................................................................................................................2

2.3地理位置和项目环境......................................................................................................4

3、设计概况..............................................................................................................................5

3.1基坑围护设计概况..........................................................................................................5

4、工程目标..............................................................................................................................8

第二章施工总体部署......................................................................................................................9

第三章本工程特点、重点、难点及对策措施............................................................................10

1、基坑开挖难度大、安全风险高、工期紧任务重............................................................10

1.1基坑开挖涉及土层分析................................................................................................10

1.2基坑工程应控制风险点................................................................................................10

第四章施工技术............................................................................................................................12

1、施工测量............................................................................................................................12

1.1测量规范.......................................................................................................................12

1.2测量方法.......................................................................................................................12

1.3注意事项.......................................................................................................................13

2、基坑围护施工方案............................................................................................................13

2.1钻孔灌注桩施工...........................................................................................................13

2.2五轴水泥土搅拌桩施工................................................................................................19

2.3内插型钢水泥土搅拌墙施工........................................................................................22

2.4压密注浆地基加固施工................................................................................................25

2.5基坑支撑施工及拆除方案............................................................................................26

2.6应急措施.......................................................................................................................29

2.7双液注浆施工...............................................................................................................30

第五章质量、安全、文明施工及环境保护措施、创优计划....................................................31

1、质量保证措施和创优计划................................................................................................31

1.1质量管理措施...............................................................................................................31

1.2地基加固质量保证措施................................................................................................32

1.3水泥土搅拌墙冷缝等特殊情况处理............................................................................32

1.4五轴水泥土搅拌桩施工................................................................................................33

1.5格构柱定位、固定与吊装............................................................................................33

第六章施工进度计划及工期保证措施........................................................................................36

1、施工进度计划安排............................................................................................................36

1.1总进度计划编制指导思想............................................................................................36

1.2施工进度计划...............................................................................................................36

2、确保工期的技术保证措施...........................