您好,欢迎访问三七文档
当前位置:首页 > 建筑/环境 > 给排水/暖通与智能化 > 倒虹吸混凝土浇筑专项施工方案
南水北调中线一期工程总干渠沙河~a河南(委托建管项目)as段第a施工标段合同编号:aNJ-a/CH/SGa倒虹吸混凝土浇筑专项施工方案批准:审核:编制:aaa有限公司南水北调中线一期工程a段a标项目经理部二Oaa月a五日目录11.2.3、出口段··························51.3、A沟排水倒虹吸1.工程概况····················31.1、A沟排水倒虹吸·························31.1.1、进口段··························31.1.2、管身段··························31.1.3、出口段··························31.2A沟排水倒虹吸··························41.2.1、进口段··························41.2.2、管身段···························4··································51.3.1、进口段··························61.3.2、管身段··························61.3.3、出口段··························62、编制依据·····························73、施工准备·····························74、施工方法·····························84.1进出口砼····························84.2管身段砼····························84.3进出口段砼···························94.3.1施工流程··························94.3.2砼分层分块·························94.3.3砼运输···························94.3.4砼浇筑···························94.4管身施工····························94.4.1施工流程··························94.4.2砼分层分块·························115、施工操作工艺···························115.1砼的拌制····························1125.2砼和运输····························115.3砼浇筑······························115.3.1浇筑前的准备工作······················115.3.2浇筑····························115.3.3振捣····························125.3.4养护····························126、质量管理·····························126.1质量目标····························126.2质量管理方针··························126.3对各工序实行严格的“三检”制度·················136.4砼工程质量技术保证措施·····················136.5质量检验过程··························147、砼质量常见通病的产生原因及防治和处理···············148、砼施工缝的处理··························169、混凝土养护····························1610、成品保护····························1611、安全措施····························1612、施工注意事项··························1613、混凝土浇筑进度计划························1713.1、大河刘沟排水倒虹吸混凝土浇筑开、竣工日期···········1713.2、大马村沟排水倒虹吸混凝土浇筑开、竣工日期···········1713.3、大关庄沟排水倒虹吸混凝土浇筑开、竣工日期···········17倒虹吸混凝土浇筑专项施工方案31.工程概况1.1、a排水倒虹吸a干渠桩号为aa,大地坐标为x=a7200.151,y=48a43.768(1度带)。交叉断面以a面积8.4km2,沟道50年一遇洪峰流量36m3/s,200年一遇洪峰流量52m3/s。工程修建后沟道50年一遇洪峰流量38m3/s、200年一遇洪峰流量45m3/s。大河刘沟排水倒虹吸总长240.229m,其中管身水平投影长151.229m,管身断面为2孔箱形,单孔过水断面2.5m×2.5m。本工程主要由进口连接段、管身段、出口消能防冲段等部分组成。1.1.1、进口段进口段总长35.00m,由护砌段、水平连接段组成。护砌段长15m,底宽由12m渐变为6.0m,边坡为1:2.0,底板高程119.50m,底板及边坡护砌厚均为0.3m,采用M7.5浆砌块石;为减少泥沙进入倒虹吸,在护砌段末端布置一高0.5m的拦砂坎,坎顶高程120.00m;水平连接段长20.00m,底板高程119.50m,底宽6.0m,底板厚0.5m,两侧采用C20混凝土圆弧型翼墙,翼墙采用悬臂式挡土墙,墙顶高程按200年一遇滞蓄洪水位加0.3m超高确定为123.85m,底板和翼墙均采用C20混凝土。水平连接段出口与倒虹吸进口相连。进口翼墙、底板与进口管身之间分缝中设两道橡胶止水带,一道密封胶。进口段所有分缝中填充聚乙烯闭孔泡沫板,厚2cm。1.1.2、管身段倒虹吸管身由进口斜管段、水平管段、出口斜管段三部分组成,其水平投影长度分别为58.668m、38.115m和54.446m,总长151.229m;进、出口斜管段坡度分别为1:6和1:7,倒虹吸进口底高程119.50m,水平管段底高程109.722m,出口底板高程117.5m。管身纵向设12条沉陷缝,以适应地基不均匀沉陷及温度变化引起的管身伸缩。缝内设两道遇水膨胀橡胶止水带,迎水面设3cm厚密封胶,并以聚乙烯闭孔泡沫板填缝,管身接缝外侧采用长丝无纺土工布包裹,缝两侧宽各40cm。整个倒虹吸管身底部设厚10cm的C10砼垫层,以改善地基应力分布,也方便施工。水平段管顶埋深在总干渠渠底下2.0m。倒虹吸管身横向为2孔箱形钢筋砼结构,单孔孔口尺寸为2.5m×2.5m,顶板厚45cm,底板厚50cm,边墙厚40cm,中隔墙厚40cm。管身采用C30钢筋混凝土。1.1.3、出口段出口段总长54.00m,由消力池段、海漫段、防冲槽段组成。消力池段长18m,4宽5.35m,深1.0m,底板厚0.7m,底板上设垂直排水孔,下设0.2m粗砂垫层和土工布反滤层,两侧为悬臂式翼墙,采用C20混凝土;海漫段长36m,其中前17m为八字墙渐变段,底宽由5.35m变为12.00m,底部高程为118.50m,底板采用M7.5浆砌块石;后19m为梯形断面,边坡为1:2.0,底板及护坡均为0.3m厚的M7.5浆砌块石;为防止海漫底部遭受冲刷,在海漫末端设防冲槽,深2.0m。出口段除消力池底板与翼墙间的缝中设一道橡胶止水带外,其余分缝中填充聚乙烯闭孔泡沫板,厚2cm。a倒虹吸主要工程量表序号项目单位工程量备注1土方开挖m335457.22土方填筑m320993.95包括高塑性土、低压缩性土3砂石垫层、反滤m3542.624混凝土m32290.315钢筋(t)t187.876浆砌石m31110.371.2、a沟排水倒虹吸a面积7.3km2,交叉断面处总干渠桩号为Sa,大地坐标为:X=382a.274,Y=487a8.482。交叉断面天然状态下50年一遇洪峰流量32m3/s、200年一遇洪峰流量47m3/s;工程修建后50年一遇设计流量8m3/s、200年一遇校核流量16m3/s。建筑物总长185.96m,管身长107.06m,孔数1孔、单孔尺寸为2.0m×2.0m(宽×高)。大马村沟排水倒虹吸工程,由进口段连接段、管身段、出口消能防冲段组成。1.2.1、进口段进口连接段总长35.90m。其中靠近倒虹吸进口设10m长的水平段,底宽为5.0m,底部高程117.82m,前端以1:5的坡与沟底连接,沟底高程121.00m,采用浆砌石护砌;为便于与两岸联接并改善进流条件,设有半径为15.00m的圆弧翼墙,翼墙采用悬臂式挡土墙,墙顶高程123.82m;为减少清淤工作,在倒虹吸管身段前25.90m处布置一拦砂坎,坎顶高程为121.50m。1.2.2、管身段倒虹吸管身水平投影总长106.511m,管身由进口斜管段、水平管段和出口斜管段三部分组成,其中进口斜管段水平投影长42.744m,进口斜管段坡度为1:6,水平管5段长21.929m,出口斜管段长41.839m,出口斜管段坡度为1:6。倒虹吸进口底板高程117.82m,水平管段管底高程110.701m,出口底板高程117.67m。管身在开挖基面上平铺0.1m厚的C10素混凝土,涂抹沥青后再浇筑管身。管身由1孔2.0m×2.0m的钢筋混凝土箱涵构成;边墙厚0.40m,底板厚度0.50m,顶板厚度0.4m,倒虹吸管身段混凝土强度等级均采用C30。倒虹吸管采用分段现浇,相邻两段之间设伸缩沉降缝,缝内设止水,以适应建筑物因温度变化引起的变形和地基不均匀沉陷的影响。伸缩沉降缝缝宽20mm,管壁内设两道橡胶止水带,内侧采用30mm厚密封胶,填缝材料采用闭孔泡沫塑料板。1.2.3、出口段此段主要由出口消力池段、海漫段和防冲槽组成。出口消力池段紧接倒虹吸出口,长10.0m,底板高程117.67m,两岸为悬臂式挡土墙;海漫段为20m长斜坡段和6.0m长的水平段,斜坡段坡比为1:5,水平段底板高程121.50m,水平段为M7.5浆砌石护底,底板厚0.30m;为防止海漫底部遭受冲刷,在海漫末端设防冲槽,深2.0m。a沟倒虹吸主要工程量表序号项目单位工程量备注1土方开挖m337462.512土方填筑m319307.29包括高塑性土、低压缩性土3砂石垫层、反滤m3413.84混凝土m31350.025钢筋t95.166浆砌石m3634.31.3、a沟排水倒虹吸a1a74.7,交叉点处大地坐标为:X=3832a9.372,Y=485a1.349。天然情况下50年一遇沟道洪峰流量17m3/s、200年一遇沟道洪峰流量24m3/s;工程交叉处总干渠设计流量295m3/s,加大流量355m3/s。本倒虹吸50年一遇设计流量16.5m3/s、200年一遇校核流量23.5m3/s.建筑物总长210.5m,管身长120m,孔数1孔,孔径为2.5m×2.5m(宽×高)。a水倒虹吸主要由进口连接段、管身段、出口消能防冲段等部分组成,总长210.5m。其中进口连接段长41m,管身段长120m,出口消能防冲段长49.50m。61.3.1、进口段进口连接段总长41.00m。其中靠近倒虹吸进口设15m长的水平段,底宽为2.5m,底部高程117.33m,前端以1:4的坡与沟底连接,沟底高程122.5m;为便于与两岸联接设有半径为16.5m的圆弧翼墙,翼墙采用悬臂式挡土墙,墙顶高程124.13m;因地层为细砂,为防止建筑物淤积,在进水口三面设置拦砂坎,正面拦砂坎高程123.50m,两侧拦砂坎高程124.0m。1.3.2、管身段倒虹吸管身水平投影总长120m,管身由进口斜管段、水平管段和出口斜管段三部分组成,其中进口斜管段水平投影长51.14m,进口斜管段坡度为1:6.5,水
本文标题:倒虹吸混凝土浇筑专项施工方案
链接地址:https://www.777doc.com/doc-4967012 .html