常熟盾构施工方案

江苏常熟发电有限公司2×1000MW机组扩建取水工程进水隧道盾构推进工程施工方案编制：审核：批准：福建四海工程公司2009年8月江苏常熟发电有限公司2×1000MW机组扩建取水工程进水隧道盾构推进工程施工方案1目录编制说明···································································································1第一章工程概况·························································································21工程内容·······························································································2第二章地质和水文条件················································································31工程地质与水文地质条件·········································································32工程环境······························································································53工程特点、难点分析···············································································6第三章施工准备·························································································81施工进度计划························································································82施工人员组织························································································93机械设备组织·······················································································114工程、施工材料组织··············································································145施工场地布置·······················································································166生产设施布置·······················································································177开工前的质量准备工作···········································································17第四章盾构施工方案·················································································191测量方案······························································································192.盾构施工······························································································213隧道防水·····························································································374风险管理预案·······················································································415隧道施工质量标准·················································································43第五章质量保证措施·················································································441工程质量目标·······················································································442质量保证体系·······················································································443质量保证措施·······················································································45江苏常熟发电有限公司2×1000MW机组扩建取水工程进水隧道盾构推进工程施工方案2第六章安全保证措施·················································································601安全管理目标·······················································································602安全生产保证体系·················································································603安全生产规范性文件··············································································614专项安全生产措施·················································································615文明施工保证措施·················································································666工地卫生制度·······················································································67江苏常熟发电有限公司2×1000MW机组扩建取水工程进水隧道盾构推进工程施工方案1编制说明1编制依据本施工方案的编制依据为：《工程测量规范》GB50026-93《地下工程防水技术规范》GB50108-2001《建筑变形测量规程》JGJ/T8-97上海市标准《地基基础设计规范》DGJ08-11-1999上海市标准《盾构法隧道防水技术规程》DBJ08-50-96《上海市市政工程质量检验评定标准》第五分册隧道工程江苏常熟发电有限公司2×1000MW机组扩建进水隧道平面布置图F213902S－S5210江苏常熟发电有限公司2×1000MW机组扩建进水隧道标准段衬砌土建施工图F213902S－S5212江苏常熟发电有限公司2×1000MW机组扩建进水隧道特殊段衬砌土建施工图F213902S－S52142适用范围本施工方案适用范围包括江苏常熟发电有限公司2×1000MW机组扩建进水隧道的盾构推进、管片拼装；隧道防水等工程的施工组织、质量管理以及安全和文明施工等方面。江苏常熟发电有限公司2×1000MW机组扩建取水工程进水隧道盾构推进工程施工方案2第一章工程概况1工程内容江苏常熟发电有限公司2×1000MW机组扩建取水工程主要包括一座联体取水泵房、2条进水隧道及14根垂直顶升立管。取水泵房井位于长江防洪大堤内侧，距大堤外坡脚约12m。与进水隧道相连，同时进水间兼作进水隧道施工的工作井。本工程共2条钢筋混凝土进水隧道，进水隧道分别从取水泵房出发穿越长江大堤向长江延伸，采用盾构法施工。2×1000MW机组扩建工程进水隧道内径为φ4.2m，单根进水隧道投影长度长943.08m。在隧道端部分别设进水口，共计14只垂直顶升立管进水，立管内径1.43×1.43m，高11m。立管周围采用抛石稳管保护。隧道穿越长江大堤时需采取相应的保护措施，大堤沉降量应控制在2cm以内。大堤防浪墙顶设计标高7.3m，堤外长江潮水位：P0.1％=5.711m；P1％=4.891m；P97％=-1.631m；P99％=-1.741m江苏常熟发电有限公司2×1000MW机组扩建取水工程进水隧道盾构推进工程施工方案3第二章地质和水文条件1工程地质与水文地质条件本工程的水文地质情况大致如下。1.1水文条件（1）潮汐本工程位于长江入海口，本河段的潮位变化具有典型的长江河口段的特征，其潮汐特征如下：历年最高潮位：4.50m（1997.8.19）历年最低潮位：-1.53m（1990.12.1t）历年平均高潮位：1.71m历年平均低潮位：-0.56m历年平均潮差：2.19m历年最大潮差：4.90m历年最小潮差：0.01m（2）潮流本河段的感潮强度，全年内均为涨落潮双向流，据实测和计算，本河段平均潮流流量，在汛期约二倍于大通站的数值，流量可达10~11×104m3/s，在枯水期约五、六倍于大通站，流量可达5~6×104m3/s。平均落潮流速为：0.98m/s涨潮最大流速为：3.12m/s涨潮最小流速为：0.32m/s落潮最大流速为：2.78m/s落潮最小流速为：0.62m/s江苏常熟发电有限公司2×1000MW机组扩建取水工程进水隧道盾构推进工程施工方案41.2气象资料各气象要素如下：（1）历年平均气压：101650Pa（2）气温（℃）历年平均气温：15.5历年极端最高气温：38.0（1998年8月11日，15日）历年极端最低气温：-11.5（1977年1月31日）历年平均最高气温：19.9历年平均最低气温：11.9（3）相对湿度（％）历年年平均相对湿度：81历年最小相对湿度：10（1986年3月2日）历年平均绝对湿度：1640历年最大绝对湿度：4350（1993年1月7日）历年最小绝对湿度：80（1968年3月2日）（4）历年平均蒸发量12440mm历年平均降水量：1082.8历年最大年降水量：1506.8（1991年）历年最大月降水量：601.3（1993年8月）历年最大一次连续降水量：193.7（1992年3月13-28日）（5）风历年平均风速：3.3m/s历年实测十分钟平均最大风速：20.0m/sNW（1997年9月11日、1993年6月2日）历年全年主导风向：SSE、NNE（频率8％）历年夏季主导风向：SSE（频率14％）历年冬季主导风向：NW（频率11％）（6）日照历年平均日照时数：1939.gh历年平均日照百分率：