*******导流泄洪洞工程挑流鼻坎施工方案(桩号0+492~0+533.285)*********水库导流泄洪洞工程项目经理部2011年4月24日目录1、工程概况............................................................................................................................................12、材料....................................................................................................................................................13、施工总体布署....................................................................................................................................13.1施工道路.................................................................13.2施工用电.................................................................13.3施工用水.................................................................14、施工进度计划....................................................................................................................................25、人员配置............................................................................................................................................26、机械设备配置....................................................................................................................................27、施工方案............................................................................................................................................37.1、基坑开挖................................................................37.2、固结灌浆................................................................37.3、砼施工..................................................................47。3。1、砼浇筑工艺流程图.................................................47。3。2、施工分缝图.......................................................57。3。3、钢筋制作.........................................................57。3.4、模板制作..........................................................67.3。5、砼拌合、运输、浇筑、养护..........................................67。3。6、施工缝处理.......................................................78、质量控制及保证措施........................................................................................................................78。1、模板制作及安装.........................................................78.2、浇筑....................................................................78.3、砼夏季施工注意事项......................................................88。4、脱模、养护及缺陷处理...................................................89、安全措施............................................................................................................................................910、文明施工..........................................................................................................................................92挑流鼻坎施工方案1、工程概况*********导流泄洪洞工程位于大坝右岸,全长541.4m,由进口控制段、洞身段、出口段组成,进口段设放水塔。工程等级为Ⅲ等,工程规模为中型。出口位于坝轴线下游205m处,地板高程675。08m.出口消能段桩号0+492~0+530。2,采用挑流消能,平面扩散鼻坎形式,挑坎长21。8m,底宽4.5m。挑流鼻坎两侧为砼梯形挡墙,挡墙高10.12~7m,挡墙后面石渣回填。挑坎反弧半径40m,角度23°31′38″,坎顶高程678.2m。挑坎为U形整体式结构,底板采用HFC40高性能防冲抗磨混凝土,边墙采用C30钢筋混凝土...