污水处理厂截污主干管工程深基坑支护专项施工方案

东莞市沙田镇福禄沙污水处理厂配套截污主干管工程基坑施工专项技术方案东莞市建工集团有限责任公司-1-目录一、编制依据·····························································-6-二、工程概况···························································-8-三、施工设计要求···················································-11-四、基坑支护结构设计原则及标准······························-12-五、支护方案的选取················································-13-六、施工准备·························································-13-1、人力资源···························································-13-2、机械设备···························································-14-3、技术准备···························································-15-4、物质准备···························································-15-5、现场准备···························································-15-7、施工测量与保护··················································-16-（1）施工测量前准备··············-16-（2）测量放线·················-16-（3）施工高程测量···············-17-（4）施工中标高控制··············-17-七、施工方案·······························································-18-（一）、基坑止水、导水、排水施工方案·····························-18-（1）、止水、排水、导水的目的·································-18-东莞市沙田镇福禄沙污水处理厂配套截污主干管工程基坑施工专项技术方案东莞市建工集团有限责任公司-2-（2）、施工技术措施················································-18-（3）、井点降水施工技术措施····································-20-（4）、降水监测·························································25（5）、地下水资源再利用·············································27（二）、（基坑）土方开挖施工方案·······································28（1）、开挖前准备······················································28（2）、土方开挖·························································28（3）、施工开挖注意事项·············································29（4）、余泥堆放及外运················································30（三）、支护施工方案······················································32（2）、施工安全措施···············-34-（3）、施工工艺和注意事项············-35-（五）、钻孔浇注桩支护施工方案·········-85-（六）需换填地段地基处理方案································-96-（1）、概述···················-96-（2）、碎石砂换填施工方法············-96-（3）、不良地基处理的建议············-96-八、基坑监测的重点及措施············································-98-（1）、监测目的······················································-98-东莞市沙田镇福禄沙污水处理厂配套截污主干管工程基坑施工专项技术方案东莞市建工集团有限责任公司-3-1、基坑监测：·················-98-2、基坑检测：·················-99-（2）、监测要求·····················································-100-（3）、监测基本方法···············································-101-1、坡顶水平位移监测··············-101-2、沉降观测··················-101-3、水位监测··················-102-4、监测周期及报告···············-102-5、通过监测建立预警系统············-103-6、监测项目的警告/警戒值············-103-7、监测频率··················-104-8、监控测量的程序···············-104-（4）、监测内容·····················································-105-1、监测项目、测点布置和精度要求········-105-序号······················-105-位置或监测对象·················-105-测试元件····················-105-监测精度····················-105-测点布置····················-105-东莞市沙田镇福禄沙污水处理厂配套截污主干管工程基坑施工专项技术方案东莞市建工集团有限责任公司-4-2、基坑监测项目················-106-监测项目····················-106-等级······················-106-支护结构侧移··················-106-建筑物、管线变形················-106-地下水位····················-106-锚杆拉力····················-106-支撑轴力或变形·················-106-桩墙内力····················-106-土体变形····················-106-土压力·····················-106-3、基坑围护结构的稳定性监测··········-106-（1）围护墙（桩）墙身倾斜变形监测（测斜）···-106-（2）围护结构顶部水平位移监测·········-107-（3）围护结构顶部垂直位移（沉降）监测·····-107-4、围护结构的土压力监测············-107-5、基坑回弹变形监测··············-108-6、地表变形监测················-108-（1）地表沉降监测···············-108-东莞市沙田镇福禄沙污水处理厂配套截污主干管工程基坑施工专项技术方案东莞市建工集团有限责任公司-5-（2）基坑周围土体水平位移监测·········-108-（3）地下管线、构筑物水平位移及沉降监测····-109-7、毗邻建筑物监测···············-109-（1）地下水位变化监测·············-109-（2）降水效果监测···············-109-（3）孔隙水压力监测··············-110-（4）、监控量测的数据分析和预测·····························-110-九、基坑使用维护安全措施············································-111-（1）、基坑维护重点···············································-111-（2）、基坑维护措施落实·········································-111-东莞市沙田镇福禄沙污水处理厂配套截污主干管工程基坑施工专项技术方案东莞市建工集团有限责任公司-6-一、编制依据1、《东莞市沙田镇福禄沙污水处理厂配套截污主干管工程施工图设计》2、中国市政工程东北设计研究院提供的《东莞市沙田镇福禄沙污水处理厂配套截污主干管工程岩土工程勘察报告》3、《沙田镇福禄沙污水处理厂配套截污主干管工程》招标文件。4、我公司企业标准、程序文件、作业指导书、成功管理经验等编制而成。5、国家及东莞市现行的相关标准、规范和规程、法律、法规及政府授权管理部门的规定及要求等。6、本方案编制主要引用以下规范和标准1,基坑锚管支护技术规程,CECS96：972,建筑基坑支护技术规程,JGJ120－993,混凝土结构工程施工质量验收规范,GB50024-20024,建筑地基基础工程施工质量验收规范,GB50202-20025,上层锚杆设计与施工规范,CECS22：906,钢结构设计规范,GB500017-20027,建筑地基处理技术规范,JGJ97-20028,建筑变形测量规范,GB500017-20039、中国市政工程东北设计研究院《东莞市东莞市沙田镇福禄沙污水处理厂配套截污主干管工程施工图设计》10、中国市政工程东北设计研究院《沙田镇福禄沙污水处理厂配套截污主干管工程地下管线探测技术报告》及图纸11,建筑基坑工程技术规范,YB9258－9712,建筑与市政降水工程技术,JGJ/T111-9813,混凝土结构工程施工及验收规范,GB50204-2002东莞市沙田镇福禄沙污水处理厂配套截污主干管工程基坑施工专项技术方案东莞市建工集团有限责任公司-7-14,工程测量规范及条文说明,GB50026-9315,建筑施工安全检查标准,JGJ59-9916,建筑机械使用安全技术规程,JGJ33-200117,施工现场临时用电安全技术规范,JGJ46-200518,建设工程施工现场供用电安全规范,GB50194-93东莞市沙田镇福禄沙污水处理厂配套截污主干管工程基坑施工专项技术方案东莞市建工集团有限责任公司-8-二、工程概况（一）、工程总述沙田镇福禄沙污水处理厂配套截污主干管工程位于东莞市沙田镇，工程名称：东莞市沙田镇污水处理厂截污主干管工程建设地点：东莞市沙田镇建设单位：东莞市环保产业促进中心；沙田镇人民政府设计单位：中国市政工程东北设计研究院质量标准：达到国家或行业质量检验评定的合格标准（二）、工程范围和内容：工程建设范围：东莞市沙田镇污水处理厂截污主干管工程（包括沟槽开挖、基坑支护、管道铺设、检查井、截流井、顶管的工作井及接收井、提升泵站等）。工程内容：本次截污主干