人工挖孔桩专项施工方案(正式版)

本课题研究的目的就是通过一系列教学活动，激发学生的学习兴趣，为学生创造和谐的“说”的氛围，为学生积淀“说”的素材，为学生创造“说”的情景和空间局党建工作总体思路是：坚持以习近平新时代中国特色社会主义思想为指导，全面学习宣传贯彻党的十九大、十九届三中全会精神force(youthteams)andCountypartyleaders,aimedatweakeningtheanti-Japaneseforces.ZhuangShaozhenwasremovedfromOfficeandtotheundergroundrevolutionactivitiescarriedoutinthecountry,politicalpartiesweredissolved.ZhejiangcomradesandthuslosingafootholdinWujiangbasispoints.Tomakethemstay,jindapengservedascaptainoftheyoungworkersthroughactivities,makethepoliticalplayer-wiseintotheyouthteam.Saveagroupofthebackboneoftheresistance,andgavetheCommunists...CommanderZhuXi,ledbyDeputyCommanderWangHesong,stationedalongthejunctionofJiangsuxincheng,Wuzhen.ZhuXitroopsKMT-CCPcooperationandanti-Japanesepolicyofsolidarity,hemovedtoJiangsuandZhejiangprovinces.ZhuDepartmenttimesanddayArmyhand-to-handcombatmadevictory,growhasmomentum,standingstrictTomb,andnewChengofappeasementarmygiantHaruBrigadeanyway,receivedadapted;livingTaihuLakeofbinoftwoaevenHunanarmywithofallegiance;JiangsuandZhejiangjunctionareaofWangChunlinDepartmentabout500peoplealsohasdoneaYuZhuXimen;River,andZhejiang,andShanghaiareamanytourmiscellaneousforcesalsoattractedattachedreturn,plusmanylocalyouthhavejoinedforces,ZhuXistrengthbigincreased,fromoriginalmorethan200morepeoplequicklydevelopmenttomorethan4,000morethanpeople,openedhasatoWuzhenforCenter,includingstrictTomb,andShuanglin,practicingguerrillabaseoftheurban,newChengbecamestrongestguerrillaforcesoftheKuomintangalongtheborderofJiangsuandZhejiang.InApril,theDeputyCommanderoftheZhuXiWangHesongtomboftheeighthBrigademorethanmorethan100gunsintothecountryofPakistanandaHui,Miao,jijiaozhishiwiththetown.Atthispoint,andundergroundIlostcontact,基础人工挖孔桩专项施工方案1编制说明及依据1.1编制说明根据对设计图纸、地质勘察说明及对周边环境的调查，并对工程特点进行深入分析，结合考虑我公司的技术、装备、特长、管理水平，在总结以往同类工程施工经验的基础上，编写了本专项施工方案。1.2编制依据（1)“贵州省余庆至凯里高速公路两阶段施工设计图纸”。（2）合同文件。（3)贵州省余庆至凯里高速公路施工标准管理指南（桥梁）。1.3采用的技术标准、规范(1)《公路桥涵施工技术规范》JTGTF50-2011(2)《公路工程质量检验评定标准》JTGT80/1-20042工程概况2.1工程设计概况贵州省余庆至凯里高速公路YT合同段主线起止里程为K3+900-K9+680，全长5.78Km；连接线起止里程GK0+000-GK5+970.783，全长5.97Km；C匝道起止里程CK0+173.13-CK0+505.344,全长0.33Km；L匝道起止里程LK0+330-LK1+131.657,全长0.8Km。其中有特大桥1座，大桥5座，中桥1座，小桥3座，互通匝道桥1座，人行天桥1座。大部分桩基础位于山岭地带，施工地形陡峭而复杂，无地下水或少量地下水的土层和岩层，施工采用人力配合简单的机具设备下井挖掘成孔，灌注混凝土成桩的施工工艺，即采用人工挖孔桩进行桩基础施工。2.2人工挖孔桩设计人工挖孔桩桩径为φ1200mm～φ2200mm，本工程共有406根桩，其中人工挖孔桩为390根，具体情况如下：桩径φ1200mm有44根，合计662m；φ本课题研究的目的就是通过一系列教学活动，激发学生的学习兴趣，为学生创造和谐的“说”的氛围，为学生积淀“说”的素材，为学生创造“说”的情景和空间局党建工作总体思路是：坚持以习近平新时代中国特色社会主义思想为指导，全面学习宣传贯彻党的十九大、十九届三中全会精神force(youthteams)andCountypartyleaders,aimedatweakeningtheanti-Japaneseforces.ZhuangShaozhenwasremovedfromOfficeandtotheundergroundrevolutionactivitiescarriedoutinthecountry,politicalpartiesweredissolved.ZhejiangcomradesandthuslosingafootholdinWujiangbasispoints.Tomakethemstay,jindapengservedascaptainoftheyoungworkersthroughactivities,makethepoliticalplayer-wiseintotheyouthteam.Saveagroupofthebackboneoftheresistance,andgavetheCommunists...CommanderZhuXi,ledbyDeputyCommanderWangHesong,stationedalongthejunctionofJiangsuxincheng,Wuzhen.ZhuXitroopsKMT-CCPcooperationandanti-Japanesepolicyofsolidarity,hemovedtoJiangsuandZhejiangprovinces.ZhuDepartmenttimesanddayArmyhand-to-handcombatmadevictory,growhasmomentum,standingstrictTomb,andnewChengofappeasementarmygiantHaruBrigadeanyway,receivedadapted;livingTaihuLakeofbinoftwoaevenHunanarmywithofallegiance;JiangsuandZhejiangjunctionareaofWangChunlinDepartmentabout500peoplealsohasdoneaYuZhuXimen;River,andZhejiang,andShanghaiareamanytourmiscellaneousforcesalsoattractedattachedreturn,plusmanylocalyouthhavejoinedforces,ZhuXistrengthbigincreased,fromoriginalmorethan200morepeoplequicklydevelopmenttomorethan4,000morethanpeople,openedhasatoWuzhenforCenter,includingstrictTomb,andShuanglin,practicingguerrillabaseoftheurban,newChengbecamestrongestguerrillaforcesoftheKuomintangalongtheborderofJiangsuandZhejiang.InApril,theDeputyCommanderoftheZhuXiWangHesongtomboftheeighthBrigademorethanmorethan100gunsintothecountryofPakistanandaHui,Miao,jijiaozhishiwiththetown.Atthispoint,andundergroundIlostcontact,21300mm有32根，合计500m；φ1500mm有24根，合计870m；φ1800mm有236根，合计5640m；φ2000mm有30根，合计896m；φ2200mm有24根，合计,606m。全段挖孔桩合计9174m。桩顶地质较差部分采用钢筋混凝土护壁，主筋保护层厚50mm，地质较好部分可采用素混凝土护壁；根据贵州省余庆至凯里高速公路施工标准化管理指南（桥梁）规定护壁厚10~15cm；设计桩芯砼等级为C25，护壁也采用同桩身相同标号的C25砼现浇。2.3自然条件（1）地形、地貌本项目主线属溶蚀山原、溶蚀丘峰型地貌，海拔800～1000m，相对高差一般为50～100m。地表以可溶性岩为主，岩石裸露，山峰林立，山坡局部陡峭，山间分布有洼地、落水洞、漏斗峡谷等；余庆连接线大部分为构造盆地型地貌，海拔500~700m，相对高差一般为50～100m。盆地中心地势平缓，为红色泥岩和冲积砂卵石层组成。地表一般开发为道路、民房及水田等，盆地边缘（连接线起点至余庆预留互通）为红色砾岩组成，上坡一面平缓，一面陡峭，形成特有的丹霞地貌。（2）气象、水文气候：项目区气候属于亚热带季风湿润气候区，四季分明，气候温和，降水丰沛，冬无严寒，夏无酷暑，无霜期长，雨热同季，具有明显季风性气候特点。年平均气温13.6℃~16.2℃之间，最热为7月份，平均气温23.2℃~25.8℃。年平均降雨量1056mm，全年有83%的降雨量集中在4~10月份，6月份出现暴雨机率最大。灾害性气候有暴雨、春旱、伏旱、凝冻和冰雹。水文：项目区属长江流域的乌江水系的余庆河支流，地表水一般较发育，水量充沛可满足沿线施工用水及生活用水需要。（3）工程地质及水文地质条件本合同段沿线出露地层以第四系、白垩系最发育，其次为奥陶系较发育。第四系主要为地表风化坡残积层，碎石土、砂粘土、粘土等，次为河床阶地、余庆至凯里高速公路YT1合同段挖孔桩专项施工方案本课题研究的目的就是通过一系列教学活动，激发学生的学习兴趣，为学生创造和谐的“说”的氛围，为学生积淀“说”的素材，为学生创造“说”的情景和空间局党建工作总体思路是：坚持以习近平新时代中国特色社会主义思想为指导，全面学习宣传贯彻党的十九大、十九届三中全会精神force(youthteams)andCountypartyleaders,aimedatweakeningtheanti-Ja